def processAlgorithm(self, feedback):
database = self.getParameterValue(self.DATABASE)
uri = QgsDataSourceUri(database)
if uri.database() is "":
if "|layerid" in database:
database = database[: database.find("|layerid")]
uri = QgsDataSourceUri("dbname='%s'" % (database))
self.db = spatialite.GeoDB(uri)
sql = self.getParameterValue(self.SQL).replace("\n", " ")
try:
self.db._exec_sql_and_commit(str(sql))
except spatialite.DbError as e:
raise GeoAlgorithmExecutionException(self.tr("Error executing SQL:\n%s") % str(e))
def processAlgorithm(self, progress):
database = self.getParameterValue(self.DATABASE)
uri = QgsDataSourceUri(database)
if uri.database() is '':
if '|layerid' in database:
database = database[:database.find('|layerid')]
uri = QgsDataSourceUri('dbname=\'%s\'' % (database))
self.db = spatialite.GeoDB(uri)
sql = self.getParameterValue(self.SQL).replace('\n', ' ')
try:
self.db._exec_sql_and_commit(str(sql))
except spatialite.DbError as e:
raise GeoAlgorithmExecutionException(
self.tr('Error executing SQL:\n%s') % str(e))
def copy(self, target_path, copied_files, keep_existent=False):
"""
Copy a layer to a new path and adjust its datasource.
:param layer: The layer to copy
:param target_path: A path to a folder into which the data will be copied
:param keep_existent: if True and target file already exists, keep it as it is
"""
if not self.is_file:
# Copy will also be called on non-file layers like WMS. In this case, just do nothing.
return
layer_name_suffix = ''
# Shapefiles and GeoPackages have the path in the source
uri_parts = self.layer.source().split('|', 1)
file_path = uri_parts[0]
if len(uri_parts) > 1:
layer_name_suffix = uri_parts[1]
# Spatialite have the path in the table part of the uri
uri = QgsDataSourceUri(self.layer.dataProvider().dataSourceUri())
if os.path.isfile(file_path):
source_path, file_name = os.path.split(file_path)
basename, extensions = get_file_extension_group(file_name)
for ext in extensions:
dest_file = os.path.join(target_path, basename + ext)
if os.path.exists(os.path.join(source_path, basename + ext)) and \
(keep_existent is False or not os.path.isfile(dest_file)):
shutil.copy(os.path.join(source_path, basename + ext), dest_file)
new_source = os.path.join(target_path, file_name)
if layer_name_suffix:
new_source = new_source + '|' + layer_name_suffix
self._change_data_source(new_source)
# Spatialite files have a uri
else:
file_path = uri.database()
if os.path.isfile(file_path):
source_path, file_name = os.path.split(file_path)
basename, extensions = get_file_extension_group(file_name)
for ext in extensions:
dest_file = os.path.join(target_path, basename + ext)
if os.path.exists(os.path.join(source_path, basename + ext)) and \
(keep_existent is False or not os.path.isfile(dest_file)):
shutil.copy(os.path.join(source_path, basename + ext),
dest_file)
uri.setDatabase(os.path.join(target_path, file_name))
self._change_data_source(uri.uri())
return copied_files
def processAlgorithm(self, parameters, context, feedback):
database = self.parameterAsVectorLayer(parameters, self.DATABASE, context)
databaseuri = database.dataProvider().dataSourceUri()
uri = QgsDataSourceUri(databaseuri)
if uri.database() is '':
if '|layerid' in databaseuri:
databaseuri = databaseuri[:databaseuri.find('|layerid')]
uri = QgsDataSourceUri('dbname=\'%s\'' % (databaseuri))
db = spatialite.GeoDB(uri)
sql = self.parameterAsString(parameters, self.SQL, context).replace('\n', ' ')
try:
db._exec_sql_and_commit(str(sql))
except spatialite.DbError as e:
raise GeoAlgorithmExecutionException(
self.tr('Error executing SQL:\n{0}').format(str(e)))
return {}
def addConnectionConfig(cls, conn_name, uri):
"""Necessary to allow db_manager to have the list of connections get from settings."""
uri = QgsDataSourceUri(uri)
settings = QgsSettings()
baseKey = "/PostgreSQL/connections/"
baseKey += conn_name
settings.setValue(baseKey + "/service", uri.service())
settings.setValue(baseKey + "/host", uri.host())
settings.setValue(baseKey + "/port", uri.port())
settings.setValue(baseKey + "/database", uri.database())
if uri.username():
settings.setValue(baseKey + "/username", uri.username())
if uri.password():
settings.setValue(baseKey + "/password", uri.password())
if uri.authConfigId():
settings.setValue(baseKey + "/authcfg", uri.authConfigId())
if uri.sslMode():
settings.setValue(baseKey + "/sslmode", uri.sslMode())
def getConnectionParameterFromDbLayer(layer: QgsMapLayer) -> Dict[str,str]:
'''
Get connection parameters
from the layer datasource
'''
connectionParams = None
if layer.providerType() == 'postgres':
dbType = 'postgis'
else:
dbType = 'spatialite'
src = layer.source()
try:
uri = QgsDataSourceUri(src)
except:
uri = QgsDataSourceURI(src)
# TODO Use immutable namedtuple
connectionParams = {
'service' : uri.service(),
'dbname' : uri.database(),
'host' : uri.host(),
'port': uri.port(),
'user' : uri.username(),
'password': uri.password(),
'sslmode' : uri.sslMode(),
'key': uri.keyColumn(),
'estimatedmetadata' : str(uri.useEstimatedMetadata()),
'checkPrimaryKeyUnicity' : '',
'srid' : uri.srid(),
'type': uri.wkbType(),
'schema': uri.schema(),
'table' : uri.table(),
'geocol' : uri.geometryColumn(),
'sql' : uri.sql(),
'dbType': dbType
}
return connectionParams
def consolidateVectorLayer(self, layer):
newPath = self.layerTreePath(layer)
if not os.path.isdir(newPath):
os.makedirs(newPath)
exportLayer = False
providerType = layer.providerType()
if providerType == 'ogr':
self._processGdalDatasource(layer, newPath)
elif providerType in ('gpx', 'delimitedtext'):
layerFile, layerName = self._filePathFromUri(layer.source())
self._copyLayerFiles(layerFile, newPath)
newDirectory = newPath.replace(self.baseDirectory, '.')
newSource = '{dirName}/{fileName}?{layer}'.format(dirName=newDirectory, fileName=os.path.split(layerFile)[1], layer=layerName)
self.updateLayerSource(layer.id(), newSource)
elif providerType == 'spatialite':
uri = QgsDataSourceUri(layer.source())
layerFile = uri.database()
self._copyLayerFiles(layerFile, newPath)
newDirectory = newPath.replace(self.baseDirectory, '.')
uri.setDatabase('./{dirName}/{fileName}'.format(dirName=newDirectory, fileName=os.path.split(layerFile)[1]))
self.updateLayerSource(layer.id(), uri.uri())
elif providerType == 'memory':
exportLayer = True
elif providerType in ('DB2', 'mssql', 'oracle', 'postgres', 'wfs'):
if 'exportRemote' in self.settings and self.settings['exportRemote']:
exportLayer = True
else:
QgsMessageLog.logMessage(self.tr('Layers from the "{provider}" provider are currently not supported.'.format(provider=providerType)), 'QConsolidate', Qgis.Info)
if exportLayer:
filePath = os.path.join(newPath, self.safeName(layer.name()))
ok, filePath = self.exportVectorLayer(layer, filePath)
if ok:
newSource = filePath.replace(self.baseDirectory, '.')
self.updateLayerSource(layer.id(), newSource, 'ogr')
def ogrConnectionStringAndFormatFromLayer(layer):
provider = layer.dataProvider().name()
if provider == 'spatialite':
# dbname='/geodata/osm_ch.sqlite' table="places" (Geometry) sql=
regex = re.compile("dbname='(.+)'")
r = regex.search(str(layer.source()))
ogrstr = r.groups()[0]
format = 'SQLite'
elif provider == 'postgres':
# dbname='ktryjh_iuuqef' host=spacialdb.com port=9999
# user='******' password='******' sslmode=disable
# key='gid' estimatedmetadata=true srid=4326 type=MULTIPOLYGON
# table="t4" (geom) sql=
dsUri = QgsDataSourceUri(layer.dataProvider().dataSourceUri())
conninfo = dsUri.connectionInfo()
conn = None
ok = False
while not conn:
try:
conn = psycopg2.connect(dsUri.connectionInfo())
except psycopg2.OperationalError:
(ok, user, passwd) = QgsCredentials.instance().get(conninfo, dsUri.username(), dsUri.password())
if not ok:
break
dsUri.setUsername(user)
dsUri.setPassword(passwd)
if not conn:
raise RuntimeError('Could not connect to PostgreSQL database - check connection info')
if ok:
QgsCredentials.instance().put(conninfo, user, passwd)
ogrstr = "PG:%s" % dsUri.connectionInfo()
format = 'PostgreSQL'
elif provider == 'mssql':
#'dbname=\'db_name\' host=myHost estimatedmetadata=true
# srid=27700 type=MultiPolygon table="dbo"."my_table"
# #(Shape) sql='
dsUri = layer.dataProvider().uri()
ogrstr = 'MSSQL:'
ogrstr += 'database={0};'.format(dsUri.database())
ogrstr += 'server={0};'.format(dsUri.host())
if dsUri.username() != "":
ogrstr += 'uid={0};'.format(dsUri.username())
else:
ogrstr += 'trusted_connection=yes;'
if dsUri.password() != '':
ogrstr += 'pwd={0};'.format(dsUri.password())
ogrstr += 'tables={0}'.format(dsUri.table())
format = 'MSSQL'
elif provider == "oracle":
# OCI:user/password@host:port/service:table
dsUri = QgsDataSourceUri(layer.dataProvider().dataSourceUri())
ogrstr = "OCI:"
if dsUri.username() != "":
ogrstr += dsUri.username()
if dsUri.password() != "":
ogrstr += "/" + dsUri.password()
delim = "@"
if dsUri.host() != "":
ogrstr += delim + dsUri.host()
delim = ""
if dsUri.port() != "" and dsUri.port() != '1521':
ogrstr += ":" + dsUri.port()
ogrstr += "/"
if dsUri.database() != "":
ogrstr += dsUri.database()
elif dsUri.database() != "":
ogrstr += delim + dsUri.database()
if ogrstr == "OCI:":
raise RuntimeError('Invalid oracle data source - check connection info')
ogrstr += ":"
if dsUri.schema() != "":
ogrstr += dsUri.schema() + "."
ogrstr += dsUri.table()
format = 'OCI'
else:
ogrstr = str(layer.source()).split("|")[0]
path, ext = os.path.splitext(ogrstr)
format = QgsVectorFileWriter.driverForExtension(ext)
return ogrstr, '"' + format + '"'
def ogrConnectionStringAndFormat(uri, context):
"""Generates OGR connection string and format string from layer source
Returned values are a tuple of the connection string and format string
"""
ogrstr = None
format = None
layer = QgsProcessingUtils.mapLayerFromString(uri, context, False)
if layer is None:
path, ext = os.path.splitext(uri)
format = QgsVectorFileWriter.driverForExtension(ext)
return '"' + uri + '"', '"' + format + '"'
provider = layer.dataProvider().name()
if provider == 'spatialite':
# dbname='/geodata/osm_ch.sqlite' table="places" (Geometry) sql=
regex = re.compile("dbname='(.+)'")
r = regex.search(str(layer.source()))
ogrstr = r.groups()[0]
format = 'SQLite'
elif provider == 'postgres':
# dbname='ktryjh_iuuqef' host=spacialdb.com port=9999
# user='******' password='******' sslmode=disable
# key='gid' estimatedmetadata=true srid=4326 type=MULTIPOLYGON
# table="t4" (geom) sql=
dsUri = QgsDataSourceUri(layer.dataProvider().dataSourceUri())
conninfo = dsUri.connectionInfo()
conn = None
ok = False
while not conn:
try:
conn = psycopg2.connect(dsUri.connectionInfo())
except psycopg2.OperationalError:
(ok, user, passwd) = QgsCredentials.instance().get(conninfo, dsUri.username(), dsUri.password())
if not ok:
break
dsUri.setUsername(user)
dsUri.setPassword(passwd)
if not conn:
raise RuntimeError('Could not connect to PostgreSQL database - check connection info')
if ok:
QgsCredentials.instance().put(conninfo, user, passwd)
ogrstr = "PG:%s" % dsUri.connectionInfo()
format = 'PostgreSQL'
elif provider == "oracle":
# OCI:user/password@host:port/service:table
dsUri = QgsDataSourceUri(layer.dataProvider().dataSourceUri())
ogrstr = "OCI:"
if dsUri.username() != "":
ogrstr += dsUri.username()
if dsUri.password() != "":
ogrstr += "/" + dsUri.password()
delim = "@"
if dsUri.host() != "":
ogrstr += delim + dsUri.host()
delim = ""
if dsUri.port() != "" and dsUri.port() != '1521':
ogrstr += ":" + dsUri.port()
ogrstr += "/"
if dsUri.database() != "":
ogrstr += dsUri.database()
elif dsUri.database() != "":
ogrstr += delim + dsUri.database()
if ogrstr == "OCI:":
raise RuntimeError('Invalid oracle data source - check connection info')
ogrstr += ":"
if dsUri.schema() != "":
ogrstr += dsUri.schema() + "."
ogrstr += dsUri.table()
format = 'OCI'
else:
ogrstr = str(layer.source()).split("|")[0]
path, ext = os.path.splitext(ogrstr)
format = QgsVectorFileWriter.driverForExtension(ext)
return '"' + ogrstr + '"', '"' + format + '"'
def processAlgorithm(self, progress):
database = self.getParameterValue(self.DATABASE)
uri = QgsDataSourceUri(database)
if uri.database() is '':
if '|layerid' in database:
database = database[:database.find('|layerid')]
uri = QgsDataSourceUri('dbname=\'%s\'' % (database))
db = spatialite.GeoDB(uri)
overwrite = self.getParameterValue(self.OVERWRITE)
createIndex = self.getParameterValue(self.CREATEINDEX)
convertLowerCase = self.getParameterValue(self.LOWERCASE_NAMES)
dropStringLength = self.getParameterValue(self.DROP_STRING_LENGTH)
forceSinglePart = self.getParameterValue(self.FORCE_SINGLEPART)
primaryKeyField = self.getParameterValue(self.PRIMARY_KEY) or 'id'
encoding = self.getParameterValue(self.ENCODING)
layerUri = self.getParameterValue(self.INPUT)
layer = dataobjects.getObjectFromUri(layerUri)
table = self.getParameterValue(self.TABLENAME)
if table:
table.strip()
if not table or table == '':
table = layer.name()
table = table.replace(' ', '').lower()
providerName = 'spatialite'
geomColumn = self.getParameterValue(self.GEOMETRY_COLUMN)
if not geomColumn:
geomColumn = 'the_geom'
options = {}
if overwrite:
options['overwrite'] = True
if convertLowerCase:
options['lowercaseFieldNames'] = True
geomColumn = geomColumn.lower()
if dropStringLength:
options['dropStringConstraints'] = True
if forceSinglePart:
options['forceSinglePartGeometryType'] = True
# Clear geometry column for non-geometry tables
if not layer.hasGeometryType():
geomColumn = None
uri = db.uri
uri.setDataSource('', table, geomColumn, '', primaryKeyField)
if encoding:
layer.setProviderEncoding(encoding)
(ret, errMsg) = QgsVectorLayerImport.importLayer(
layer,
uri.uri(),
providerName,
self.crs,
False,
False,
options,
)
if ret != 0:
raise GeoAlgorithmExecutionException(
self.tr('Error importing to Spatialite\n%s' % errMsg))
if geomColumn and createIndex:
db.create_spatial_index(table, geomColumn)
def __init__(self, destination, encoding, fields, geometryType,
crs, options=None):
self.destination = destination
self.isNotFileBased = False
self.layer = None
self.writer = None
if encoding is None:
settings = QSettings()
encoding = settings.value('/Processing/encoding', 'System', str)
if self.destination.startswith(self.MEMORY_LAYER_PREFIX):
self.isNotFileBased = True
uri = QgsWkbTypes.displayString(geometryType) + "?uuid=" + str(uuid.uuid4())
if crs.isValid():
uri += '&crs=' + crs.authid()
fieldsdesc = []
for f in fields:
qgsfield = _toQgsField(f)
fieldsdesc.append('field=%s:%s' % (qgsfield.name(),
TYPE_MAP_MEMORY_LAYER.get(qgsfield.type(), "string")))
if fieldsdesc:
uri += '&' + '&'.join(fieldsdesc)
self.layer = QgsVectorLayer(uri, self.destination, 'memory')
self.writer = self.layer.dataProvider()
elif self.destination.startswith(self.POSTGIS_LAYER_PREFIX):
self.isNotFileBased = True
uri = QgsDataSourceUri(self.destination[len(self.POSTGIS_LAYER_PREFIX):])
connInfo = uri.connectionInfo()
(success, user, passwd) = QgsCredentials.instance().get(connInfo, None, None)
if success:
QgsCredentials.instance().put(connInfo, user, passwd)
else:
raise GeoAlgorithmExecutionException("Couldn't connect to database")
try:
db = postgis.GeoDB(host=uri.host(), port=int(uri.port()),
dbname=uri.database(), user=user, passwd=passwd)
except postgis.DbError as e:
raise GeoAlgorithmExecutionException(
"Couldn't connect to database:\n%s" % e.message)
def _runSQL(sql):
try:
db._exec_sql_and_commit(str(sql))
except postgis.DbError as e:
raise GeoAlgorithmExecutionException(
'Error creating output PostGIS table:\n%s' % e.message)
fields = [_toQgsField(f) for f in fields]
fieldsdesc = ",".join('%s %s' % (f.name(),
TYPE_MAP_POSTGIS_LAYER.get(f.type(), "VARCHAR"))
for f in fields)
_runSQL("CREATE TABLE %s.%s (%s)" % (uri.schema(), uri.table().lower(), fieldsdesc))
if geometryType != QgsWkbTypes.NullGeometry:
_runSQL("SELECT AddGeometryColumn('{schema}', '{table}', 'the_geom', {srid}, '{typmod}', 2)".format(
table=uri.table().lower(), schema=uri.schema(), srid=crs.authid().split(":")[-1],
typmod=QgsWkbTypes.displayString(geometryType).upper()))
self.layer = QgsVectorLayer(uri.uri(), uri.table(), "postgres")
self.writer = self.layer.dataProvider()
elif self.destination.startswith(self.SPATIALITE_LAYER_PREFIX):
self.isNotFileBased = True
uri = QgsDataSourceUri(self.destination[len(self.SPATIALITE_LAYER_PREFIX):])
try:
db = spatialite.GeoDB(uri=uri)
except spatialite.DbError as e:
raise GeoAlgorithmExecutionException(
"Couldn't connect to database:\n%s" % e.message)
def _runSQL(sql):
try:
db._exec_sql_and_commit(str(sql))
except spatialite.DbError as e:
raise GeoAlgorithmExecutionException(
'Error creating output Spatialite table:\n%s' % str(e))
fields = [_toQgsField(f) for f in fields]
fieldsdesc = ",".join('%s %s' % (f.name(),
TYPE_MAP_SPATIALITE_LAYER.get(f.type(), "VARCHAR"))
for f in fields)
_runSQL("DROP TABLE IF EXISTS %s" % uri.table().lower())
_runSQL("CREATE TABLE %s (%s)" % (uri.table().lower(), fieldsdesc))
if geometryType != QgsWkbTypes.NullGeometry:
_runSQL("SELECT AddGeometryColumn('{table}', 'the_geom', {srid}, '{typmod}', 2)".format(
table=uri.table().lower(), srid=crs.authid().split(":")[-1],
typmod=QgsWkbTypes.displayString(geometryType).upper()))
self.layer = QgsVectorLayer(uri.uri(), uri.table(), "spatialite")
self.writer = self.layer.dataProvider()
else:
formats = QgsVectorFileWriter.supportedFiltersAndFormats()
OGRCodes = {}
for (key, value) in list(formats.items()):
extension = str(key)
extension = extension[extension.find('*.') + 2:]
extension = extension[:extension.find(' ')]
OGRCodes[extension] = value
OGRCodes['dbf'] = "DBF file"
extension = self.destination[self.destination.rfind('.') + 1:]
if extension not in OGRCodes:
extension = 'shp'
self.destination = self.destination + '.shp'
if geometryType == QgsWkbTypes.NoGeometry:
if extension == 'shp':
extension = 'dbf'
self.destination = self.destination[:self.destination.rfind('.')] + '.dbf'
if extension not in self.nogeometry_extensions:
raise GeoAlgorithmExecutionException(
"Unsupported format for tables with no geometry")
qgsfields = QgsFields()
for field in fields:
qgsfields.append(_toQgsField(field))
# use default dataset/layer options
dataset_options = QgsVectorFileWriter.defaultDatasetOptions(OGRCodes[extension])
layer_options = QgsVectorFileWriter.defaultLayerOptions(OGRCodes[extension])
self.writer = QgsVectorFileWriter(self.destination, encoding,
qgsfields, geometryType, crs, OGRCodes[extension],
dataset_options, layer_options)
class GeoDB(object):
@classmethod
def from_name(cls, conn_name):
uri = uri_from_name(conn_name)
return cls(uri=uri)
def __init__(self,
host=None,
port=None,
dbname=None,
user=None,
passwd=None,
service=None,
uri=None):
# Regular expression for identifiers without need to quote them
self.re_ident_ok = re.compile(r"^\w+$")
port = str(port)
if uri:
self.uri = uri
else:
self.uri = QgsDataSourceUri()
if service:
self.uri.setConnection(service, dbname, user, passwd)
else:
self.uri.setConnection(host, port, dbname, user, passwd)
conninfo = self.uri.connectionInfo(False)
err = None
for i in range(4):
expandedConnInfo = self.uri.connectionInfo(True)
try:
self.con = psycopg2.connect(expandedConnInfo)
if err is not None:
QgsCredentials.instance().put(conninfo,
self.uri.username(),
self.uri.password())
break
except psycopg2.OperationalError as e:
if i == 3:
raise DbError(str(e))
err = str(e)
user = self.uri.username()
password = self.uri.password()
(ok, user, password) = QgsCredentials.instance().get(
conninfo, user, password, err)
if not ok:
raise DbError(
QCoreApplication.translate("PostGIS",
'Action canceled by user'))
if user:
self.uri.setUsername(user)
if password:
self.uri.setPassword(password)
finally:
# remove certs (if any) of the expanded connectionInfo
expandedUri = QgsDataSourceUri(expandedConnInfo)
sslCertFile = expandedUri.param("sslcert")
if sslCertFile:
sslCertFile = sslCertFile.replace("'", "")
os.remove(sslCertFile)
sslKeyFile = expandedUri.param("sslkey")
if sslKeyFile:
sslKeyFile = sslKeyFile.replace("'", "")
os.remove(sslKeyFile)
sslCAFile = expandedUri.param("sslrootcert")
if sslCAFile:
sslCAFile = sslCAFile.replace("'", "")
os.remove(sslCAFile)
self.has_postgis = self.check_postgis()
def get_info(self):
c = self.con.cursor()
self._exec_sql(c, 'SELECT version()')
return c.fetchone()[0]
def check_postgis(self):
"""Check whether postgis_version is present in catalog.
"""
c = self.con.cursor()
self._exec_sql(
c,
"SELECT COUNT(*) FROM pg_proc WHERE proname = 'postgis_version'")
return c.fetchone()[0] > 0
def get_postgis_info(self):
"""Returns tuple about PostGIS support:
- lib version
- installed scripts version
- released scripts version
- geos version
- proj version
- whether uses stats
"""
c = self.con.cursor()
self._exec_sql(
c, 'SELECT postgis_lib_version(), postgis_scripts_installed(), \
postgis_scripts_released(), postgis_geos_version(), \
postgis_proj_version(), postgis_uses_stats()')
return c.fetchone()
def list_schemas(self):
"""Get list of schemas in tuples: (oid, name, owner, perms).
"""
c = self.con.cursor()
sql = "SELECT oid, nspname, pg_get_userbyid(nspowner), nspacl \
FROM pg_namespace \
WHERE nspname !~ '^pg_' AND nspname != 'information_schema'"
self._exec_sql(c, sql)
return c.fetchall()
def list_geotables(self, schema=None):
"""Get list of tables with schemas, whether user has privileges,
whether table has geometry column(s) etc.
Geometry_columns:
- f_table_schema
- f_table_name
- f_geometry_column
- coord_dimension
- srid
- type
"""
c = self.con.cursor()
if schema:
schema_where = " AND nspname = '%s' " % self._quote_unicode(schema)
else:
schema_where = \
" AND (nspname != 'information_schema' AND nspname !~ 'pg_') "
# LEFT OUTER JOIN: like LEFT JOIN but if there are more matches,
# for join, all are used (not only one)
# First find out whether PostGIS is enabled
if not self.has_postgis:
# Get all tables and views
sql = """SELECT pg_class.relname, pg_namespace.nspname,
pg_class.relkind, pg_get_userbyid(relowner),
reltuples, relpages, NULL, NULL, NULL, NULL
FROM pg_class
JOIN pg_namespace ON pg_namespace.oid = pg_class.relnamespace
WHERE pg_class.relkind IN ('v', 'r', 'm', 'p')""" \
+ schema_where + 'ORDER BY nspname, relname'
else:
# Discovery of all tables and whether they contain a
# geometry column
sql = """SELECT pg_class.relname, pg_namespace.nspname,
pg_class.relkind, pg_get_userbyid(relowner),
reltuples, relpages, pg_attribute.attname,
pg_attribute.atttypid::regtype, NULL, NULL
FROM pg_class
JOIN pg_namespace ON pg_namespace.oid = pg_class.relnamespace
LEFT OUTER JOIN pg_attribute ON
pg_attribute.attrelid = pg_class.oid AND
(pg_attribute.atttypid = 'geometry'::regtype
OR pg_attribute.atttypid IN
(SELECT oid FROM pg_type
WHERE typbasetype='geometry'::regtype))
WHERE pg_class.relkind IN ('v', 'r', 'm', 'p') """ \
+ schema_where + 'ORDER BY nspname, relname, attname'
self._exec_sql(c, sql)
items = c.fetchall()
# Get geometry info from geometry_columns if exists
if self.has_postgis:
sql = """SELECT relname, nspname, relkind,
pg_get_userbyid(relowner), reltuples, relpages,
geometry_columns.f_geometry_column,
geometry_columns.type,
geometry_columns.coord_dimension,
geometry_columns.srid
FROM pg_class
JOIN pg_namespace ON relnamespace=pg_namespace.oid
LEFT OUTER JOIN geometry_columns ON
relname=f_table_name AND nspname=f_table_schema
WHERE relkind IN ('r','v','m','p') """ \
+ schema_where + 'ORDER BY nspname, relname, \
f_geometry_column'
self._exec_sql(c, sql)
# Merge geometry info to "items"
for (i, geo_item) in enumerate(c.fetchall()):
if geo_item[7]:
items[i] = geo_item
return items
def get_table_rows(self, table, schema=None):
c = self.con.cursor()
self._exec_sql(
c, 'SELECT COUNT(*) FROM %s' % self._table_name(schema, table))
return c.fetchone()[0]
def get_table_fields(self, table, schema=None):
"""Return list of columns in table"""
c = self.con.cursor()
schema_where = (" AND nspname='%s' " % self._quote_unicode(schema)
if schema is not None else '')
sql = """SELECT a.attnum AS ordinal_position,
a.attname AS column_name,
t.typname AS data_type,
a.attlen AS char_max_len,
a.atttypmod AS modifier,
a.attnotnull AS notnull,
a.atthasdef AS hasdefault,
adef.adsrc AS default_value
FROM pg_class c
JOIN pg_attribute a ON a.attrelid = c.oid
JOIN pg_type t ON a.atttypid = t.oid
JOIN pg_namespace nsp ON c.relnamespace = nsp.oid
LEFT JOIN pg_attrdef adef ON adef.adrelid = a.attrelid
AND adef.adnum = a.attnum
WHERE
c.relname = '%s' %s AND
a.attnum > 0
ORDER BY a.attnum""" \
% (self._quote_unicode(table), schema_where)
self._exec_sql(c, sql)
attrs = []
for row in c.fetchall():
attrs.append(TableAttribute(row))
return attrs
def get_table_indexes(self, table, schema=None):
"""Get info about table's indexes. ignore primary key and unique
index, they get listed in constraints.
"""
c = self.con.cursor()
schema_where = (" AND nspname='%s' " % self._quote_unicode(schema)
if schema is not None else '')
sql = """SELECT relname, indkey
FROM pg_class, pg_index
WHERE pg_class.oid = pg_index.indexrelid AND pg_class.oid IN (
SELECT indexrelid
FROM pg_index, pg_class
JOIN pg_namespace nsp ON pg_class.relnamespace = nsp.oid
WHERE pg_class.relname='%s' %s AND
pg_class.oid=pg_index.indrelid
AND indisunique != 't' AND indisprimary != 't' )""" \
% (self._quote_unicode(table), schema_where)
self._exec_sql(c, sql)
indexes = []
for row in c.fetchall():
indexes.append(TableIndex(row))
return indexes
def get_table_constraints(self, table, schema=None):
c = self.con.cursor()
schema_where = (" AND nspname='%s' " % self._quote_unicode(schema)
if schema is not None else '')
sql = """SELECT c.conname, c.contype, c.condeferrable, c.condeferred,
array_to_string(c.conkey, ' '), c.consrc, t2.relname,
c.confupdtype, c.confdeltype, c.confmatchtype,
array_to_string(c.confkey, ' ')
FROM pg_constraint c
LEFT JOIN pg_class t ON c.conrelid = t.oid
LEFT JOIN pg_class t2 ON c.confrelid = t2.oid
JOIN pg_namespace nsp ON t.relnamespace = nsp.oid
WHERE t.relname = '%s' %s """ \
% (self._quote_unicode(table), schema_where)
self._exec_sql(c, sql)
constrs = []
for row in c.fetchall():
constrs.append(TableConstraint(row))
return constrs
def get_view_definition(self, view, schema=None):
"""Returns definition of the view."""
schema_where = (" AND nspname='%s' " % self._quote_unicode(schema)
if schema is not None else '')
sql = """SELECT pg_get_viewdef(c.oid)
FROM pg_class c
JOIN pg_namespace nsp ON c.relnamespace = nsp.oid
WHERE relname='%s' %s AND relkind IN ('v','m')""" \
% (self._quote_unicode(view), schema_where)
c = self.con.cursor()
self._exec_sql(c, sql)
return c.fetchone()[0]
def add_geometry_column(self,
table,
geom_type,
schema=None,
geom_column='the_geom',
srid=-1,
dim=2):
# Use schema if explicitly specified
if schema:
schema_part = "'%s', " % self._quote_unicode(schema)
else:
schema_part = ''
sql = "SELECT AddGeometryColumn(%s'%s', '%s', %d, '%s', %d)" % (
schema_part,
self._quote_unicode(table),
self._quote_unicode(geom_column),
srid,
self._quote_unicode(geom_type),
dim,
)
self._exec_sql_and_commit(sql)
def delete_geometry_column(self, table, geom_column, schema=None):
"""Use PostGIS function to delete geometry column correctly."""
if schema:
schema_part = "'%s', " % self._quote_unicode(schema)
else:
schema_part = ''
sql = "SELECT DropGeometryColumn(%s'%s', '%s')" % (
schema_part, self._quote_unicode(table),
self._quote_unicode(geom_column))
self._exec_sql_and_commit(sql)
def delete_geometry_table(self, table, schema=None):
"""Delete table with one or more geometries using PostGIS function."""
if schema:
schema_part = "'%s', " % self._quote_unicode(schema)
else:
schema_part = ''
sql = "SELECT DropGeometryTable(%s'%s')" % (schema_part,
self._quote_unicode(table))
self._exec_sql_and_commit(sql)
def create_table(self, table, fields, pkey=None, schema=None):
"""Create ordinary table.
'fields' is array containing instances of TableField
'pkey' contains name of column to be used as primary key
"""
if len(fields) == 0:
return False
table_name = self._table_name(schema, table)
sql = 'CREATE TABLE %s (%s' % (table_name, fields[0].field_def())
for field in fields[1:]:
sql += ', %s' % field.field_def()
if pkey:
sql += ', PRIMARY KEY (%s)' % self._quote(pkey)
sql += ')'
self._exec_sql_and_commit(sql)
return True
def delete_table(self, table, schema=None):
"""Delete table from the database."""
table_name = self._table_name(schema, table)
sql = 'DROP TABLE %s' % table_name
self._exec_sql_and_commit(sql)
def empty_table(self, table, schema=None):
"""Delete all rows from table."""
table_name = self._table_name(schema, table)
sql = 'DELETE FROM %s' % table_name
self._exec_sql_and_commit(sql)
def rename_table(self, table, new_table, schema=None):
"""Rename a table in database."""
table_name = self._table_name(schema, table)
sql = 'ALTER TABLE %s RENAME TO %s' % (table_name,
self._quote(new_table))
self._exec_sql_and_commit(sql)
# Update geometry_columns if PostGIS is enabled
if self.has_postgis:
sql = "UPDATE geometry_columns SET f_table_name='%s' \
WHERE f_table_name='%s'" \
% (self._quote_unicode(new_table), self._quote_unicode(table))
if schema is not None:
sql += " AND f_table_schema='%s'" % self._quote_unicode(schema)
self._exec_sql_and_commit(sql)
def create_view(self, name, query, schema=None):
view_name = self._table_name(schema, name)
sql = 'CREATE VIEW %s AS %s' % (view_name, query)
self._exec_sql_and_commit(sql)
def delete_view(self, name, schema=None):
view_name = self._table_name(schema, name)
sql = 'DROP VIEW %s' % view_name
self._exec_sql_and_commit(sql)
def rename_view(self, name, new_name, schema=None):
"""Rename view in database."""
self.rename_table(name, new_name, schema)
def create_schema(self, schema):
"""Create a new empty schema in database."""
sql = 'CREATE SCHEMA %s' % self._quote(schema)
self._exec_sql_and_commit(sql)
def delete_schema(self, schema):
"""Drop (empty) schema from database."""
sql = 'DROP SCHEMA %s' % self._quote(schema)
self._exec_sql_and_commit(sql)
def rename_schema(self, schema, new_schema):
"""Rename a schema in database."""
sql = 'ALTER SCHEMA %s RENAME TO %s' % (self._quote(schema),
self._quote(new_schema))
self._exec_sql_and_commit(sql)
# Update geometry_columns if PostGIS is enabled
if self.has_postgis:
sql = \
"UPDATE geometry_columns SET f_table_schema='%s' \
WHERE f_table_schema='%s'" \
% (self._quote_unicode(new_schema), self._quote_unicode(schema))
self._exec_sql_and_commit(sql)
def table_add_column(self, table, field, schema=None):
"""Add a column to table (passed as TableField instance)."""
table_name = self._table_name(schema, table)
sql = 'ALTER TABLE %s ADD %s' % (table_name, field.field_def())
self._exec_sql_and_commit(sql)
def table_delete_column(self, table, field, schema=None):
"""Delete column from a table."""
table_name = self._table_name(schema, table)
sql = 'ALTER TABLE %s DROP %s' % (table_name, self._quote(field))
self._exec_sql_and_commit(sql)
def table_column_rename(self, table, name, new_name, schema=None):
"""Rename column in a table."""
table_name = self._table_name(schema, table)
sql = 'ALTER TABLE %s RENAME %s TO %s' % (
table_name, self._quote(name), self._quote(new_name))
self._exec_sql_and_commit(sql)
# Update geometry_columns if PostGIS is enabled
if self.has_postgis:
sql = "UPDATE geometry_columns SET f_geometry_column='%s' \
WHERE f_geometry_column='%s' AND f_table_name='%s'" \
% (self._quote_unicode(new_name), self._quote_unicode(name),
self._quote_unicode(table))
if schema is not None:
sql += " AND f_table_schema='%s'" % self._quote(schema)
self._exec_sql_and_commit(sql)
def table_column_set_type(self, table, column, data_type, schema=None):
"""Change column type."""
table_name = self._table_name(schema, table)
sql = 'ALTER TABLE %s ALTER %s TYPE %s' % (
table_name, self._quote(column), data_type)
self._exec_sql_and_commit(sql)
def table_column_set_default(self, table, column, default, schema=None):
"""Change column's default value.
If default=None drop default value.
"""
table_name = self._table_name(schema, table)
if default:
sql = 'ALTER TABLE %s ALTER %s SET DEFAULT %s' % (
table_name, self._quote(column), default)
else:
sql = 'ALTER TABLE %s ALTER %s DROP DEFAULT' % (
table_name, self._quote(column))
self._exec_sql_and_commit(sql)
def table_column_set_null(self, table, column, is_null, schema=None):
"""Change whether column can contain null values."""
table_name = self._table_name(schema, table)
sql = 'ALTER TABLE %s ALTER %s ' % (table_name, self._quote(column))
if is_null:
sql += 'DROP NOT NULL'
else:
sql += 'SET NOT NULL'
self._exec_sql_and_commit(sql)
def table_add_primary_key(self, table, column, schema=None):
"""Add a primery key (with one column) to a table."""
table_name = self._table_name(schema, table)
sql = 'ALTER TABLE %s ADD PRIMARY KEY (%s)' % (table_name,
self._quote(column))
self._exec_sql_and_commit(sql)
def table_add_unique_constraint(self, table, column, schema=None):
"""Add a unique constraint to a table."""
table_name = self._table_name(schema, table)
sql = 'ALTER TABLE %s ADD UNIQUE (%s)' % (table_name,
self._quote(column))
self._exec_sql_and_commit(sql)
def table_delete_constraint(self, table, constraint, schema=None):
"""Delete constraint in a table."""
table_name = self._table_name(schema, table)
sql = 'ALTER TABLE %s DROP CONSTRAINT %s' % (table_name,
self._quote(constraint))
self._exec_sql_and_commit(sql)
def table_move_to_schema(self, table, new_schema, schema=None):
if new_schema == schema:
return
table_name = self._table_name(schema, table)
sql = 'ALTER TABLE %s SET SCHEMA %s' % (table_name,
self._quote(new_schema))
self._exec_sql_and_commit(sql)
# Update geometry_columns if PostGIS is enabled
if self.has_postgis:
sql = "UPDATE geometry_columns SET f_table_schema='%s' \
WHERE f_table_name='%s'" \
% (self._quote_unicode(new_schema), self._quote_unicode(table))
if schema is not None:
sql += " AND f_table_schema='%s'" % self._quote_unicode(schema)
self._exec_sql_and_commit(sql)
def create_index(self, table, name, column, schema=None):
"""Create index on one column using default options."""
table_name = self._table_name(schema, table)
idx_name = self._quote(name)
sql = 'CREATE INDEX %s ON %s (%s)' % (idx_name, table_name,
self._quote(column))
self._exec_sql_and_commit(sql)
def create_spatial_index(self, table, schema=None, geom_column='the_geom'):
table_name = self._table_name(schema, table)
idx_name = self._quote(u"sidx_%s_%s" % (table, geom_column))
sql = 'CREATE INDEX %s ON %s USING GIST(%s)' % (
idx_name, table_name, self._quote(geom_column))
self._exec_sql_and_commit(sql)
def delete_index(self, name, schema=None):
index_name = self._table_name(schema, name)
sql = 'DROP INDEX %s' % index_name
self._exec_sql_and_commit(sql)
def get_database_privileges(self):
"""DB privileges: (can create schemas, can create temp. tables).
"""
sql = "SELECT has_database_privilege('%(d)s', 'CREATE'), \
has_database_privilege('%(d)s', 'TEMP')" \
% {'d': self._quote_unicode(self.uri.database())}
c = self.con.cursor()
self._exec_sql(c, sql)
return c.fetchone()
def get_schema_privileges(self, schema):
"""Schema privileges: (can create new objects, can access objects
in schema)."""
sql = "SELECT has_schema_privilege('%(s)s', 'CREATE'), \
has_schema_privilege('%(s)s', 'USAGE')" \
% {'s': self._quote_unicode(schema)}
c = self.con.cursor()
self._exec_sql(c, sql)
return c.fetchone()
def get_table_privileges(self, table, schema=None):
"""Table privileges: (select, insert, update, delete).
"""
t = self._table_name(schema, table)
sql = """SELECT has_table_privilege('%(t)s', 'SELECT'),
has_table_privilege('%(t)s', 'INSERT'),
has_table_privilege('%(t)s', 'UPDATE'),
has_table_privilege('%(t)s', 'DELETE')""" \
% {'t': self._quote_unicode(t)}
c = self.con.cursor()
self._exec_sql(c, sql)
return c.fetchone()
def vacuum_analyze(self, table, schema=None):
"""Run VACUUM ANALYZE on a table."""
t = self._table_name(schema, table)
# VACUUM ANALYZE must be run outside transaction block - we
# have to change isolation level
self.con.set_isolation_level(
psycopg2.extensions.ISOLATION_LEVEL_AUTOCOMMIT)
c = self.con.cursor()
self._exec_sql(c, 'VACUUM ANALYZE %s' % t)
self.con.set_isolation_level(
psycopg2.extensions.ISOLATION_LEVEL_READ_COMMITTED)
def sr_info_for_srid(self, srid):
if not self.has_postgis:
return 'Unknown'
try:
c = self.con.cursor()
self._exec_sql(
c,
"SELECT srtext FROM spatial_ref_sys WHERE srid = '%d'" % srid)
srtext = c.fetchone()[0]
# Try to extract just SR name (should be quoted in double
# quotes)
x = re.search('"([^"]+)"', srtext)
if x is not None:
srtext = x.group()
return srtext
except DbError:
return 'Unknown'
def insert_table_row(self, table, values, schema=None, cursor=None):
"""Insert a row with specified values to a table.
If a cursor is specified, it doesn't commit (expecting that
there will be more inserts) otherwise it commits immediately.
"""
t = self._table_name(schema, table)
sql = ''
for value in values:
# TODO: quote values?
if sql:
sql += ', '
sql += value
sql = 'INSERT INTO %s VALUES (%s)' % (t, sql)
if cursor:
self._exec_sql(cursor, sql)
else:
self._exec_sql_and_commit(sql)
def _exec_sql(self, cursor, sql):
try:
cursor.execute(sql)
except psycopg2.Error as e:
raise DbError(str(e),
e.cursor.query.decode(e.cursor.connection.encoding))
def _exec_sql_and_commit(self, sql):
"""Tries to execute and commit some action, on error it rolls
back the change.
"""
try:
c = self.con.cursor()
self._exec_sql(c, sql)
self.con.commit()
except DbError:
self.con.rollback()
raise
def _quote(self, identifier):
"""Quote identifier if needed."""
# Make sure it's python unicode string
identifier = str(identifier)
# Is it needed to quote the identifier?
if self.re_ident_ok.match(identifier) is not None:
return identifier
# It's needed - let's quote it (and double the double-quotes)
return u'"%s"' % identifier.replace('"', '""')
def _quote_unicode(self, txt):
"""Make the string safe - replace ' with ''.
"""
# make sure it's python unicode string
txt = str(txt)
return txt.replace("'", "''")
def _table_name(self, schema, table):
if not schema:
return self._quote(table)
else:
return u'%s.%s' % (self._quote(schema), self._quote(table))
class GeoDB(object):
@classmethod
def from_name(cls, conn_name):
uri = uri_from_name(conn_name)
return cls(uri=uri)
def __init__(self, host=None, port=None, dbname=None, user=None,
passwd=None, service=None, uri=None):
# Regular expression for identifiers without need to quote them
self.re_ident_ok = re.compile(r"^\w+$")
port = str(port)
if uri:
self.uri = uri
else:
self.uri = QgsDataSourceUri()
if service:
self.uri.setConnection(service, dbname, user, passwd)
else:
self.uri.setConnection(host, port, dbname, user, passwd)
conninfo = self.uri.connectionInfo(False)
err = None
for i in range(4):
expandedConnInfo = self.uri.connectionInfo(True)
try:
self.con = psycopg2.connect(expandedConnInfo)
if err is not None:
QgsCredentials.instance().put(conninfo,
self.uri.username(),
self.uri.password())
break
except psycopg2.OperationalError as e:
if i == 3:
raise QgsProcessingException(str(e))
err = str(e)
user = self.uri.username()
password = self.uri.password()
(ok, user, password) = QgsCredentials.instance().get(conninfo,
user,
password,
err)
if not ok:
raise QgsProcessingException(QCoreApplication.translate("PostGIS", 'Action canceled by user'))
if user:
self.uri.setUsername(user)
if password:
self.uri.setPassword(password)
finally:
# remove certs (if any) of the expanded connectionInfo
expandedUri = QgsDataSourceUri(expandedConnInfo)
sslCertFile = expandedUri.param("sslcert")
if sslCertFile:
sslCertFile = sslCertFile.replace("'", "")
os.remove(sslCertFile)
sslKeyFile = expandedUri.param("sslkey")
if sslKeyFile:
sslKeyFile = sslKeyFile.replace("'", "")
os.remove(sslKeyFile)
sslCAFile = expandedUri.param("sslrootcert")
if sslCAFile:
sslCAFile = sslCAFile.replace("'", "")
os.remove(sslCAFile)
self.has_postgis = self.check_postgis()
def get_info(self):
c = self.con.cursor()
self._exec_sql(c, 'SELECT version()')
return c.fetchone()[0]
def check_postgis(self):
"""Check whether postgis_version is present in catalog.
"""
c = self.con.cursor()
self._exec_sql(c,
"SELECT COUNT(*) FROM pg_proc WHERE proname = 'postgis_version'")
return c.fetchone()[0] > 0
def get_postgis_info(self):
"""Returns tuple about PostGIS support:
- lib version
- installed scripts version
- released scripts version
- geos version
- proj version
- whether uses stats
"""
c = self.con.cursor()
self._exec_sql(c,
'SELECT postgis_lib_version(), postgis_scripts_installed(), \
postgis_scripts_released(), postgis_geos_version(), \
postgis_proj_version(), postgis_uses_stats()')
return c.fetchone()
def list_schemas(self):
"""Get list of schemas in tuples: (oid, name, owner, perms).
"""
c = self.con.cursor()
sql = "SELECT oid, nspname, pg_get_userbyid(nspowner), nspacl \
FROM pg_namespace \
WHERE nspname !~ '^pg_' AND nspname != 'information_schema'"
self._exec_sql(c, sql)
return c.fetchall()
def list_geotables(self, schema=None):
"""Get list of tables with schemas, whether user has privileges,
whether table has geometry column(s) etc.
Geometry_columns:
- f_table_schema
- f_table_name
- f_geometry_column
- coord_dimension
- srid
- type
"""
c = self.con.cursor()
if schema:
schema_where = " AND nspname = '%s' " % self._quote_unicode(schema)
else:
schema_where = \
" AND (nspname != 'information_schema' AND nspname !~ 'pg_') "
# LEFT OUTER JOIN: like LEFT JOIN but if there are more matches,
# for join, all are used (not only one)
# First find out whether PostGIS is enabled
if not self.has_postgis:
# Get all tables and views
sql = """SELECT pg_class.relname, pg_namespace.nspname,
pg_class.relkind, pg_get_userbyid(relowner),
reltuples, relpages, NULL, NULL, NULL, NULL
FROM pg_class
JOIN pg_namespace ON pg_namespace.oid = pg_class.relnamespace
WHERE pg_class.relkind IN ('v', 'r', 'm', 'p')""" \
+ schema_where + 'ORDER BY nspname, relname'
else:
# Discovery of all tables and whether they contain a
# geometry column
sql = """SELECT pg_class.relname, pg_namespace.nspname,
pg_class.relkind, pg_get_userbyid(relowner),
reltuples, relpages, pg_attribute.attname,
pg_attribute.atttypid::regtype, NULL, NULL
FROM pg_class
JOIN pg_namespace ON pg_namespace.oid = pg_class.relnamespace
LEFT OUTER JOIN pg_attribute ON
pg_attribute.attrelid = pg_class.oid AND
(pg_attribute.atttypid = 'geometry'::regtype
OR pg_attribute.atttypid IN
(SELECT oid FROM pg_type
WHERE typbasetype='geometry'::regtype))
WHERE pg_class.relkind IN ('v', 'r', 'm', 'p') """ \
+ schema_where + 'ORDER BY nspname, relname, attname'
self._exec_sql(c, sql)
items = c.fetchall()
# Get geometry info from geometry_columns if exists
if self.has_postgis:
sql = """SELECT relname, nspname, relkind,
pg_get_userbyid(relowner), reltuples, relpages,
geometry_columns.f_geometry_column,
geometry_columns.type,
geometry_columns.coord_dimension,
geometry_columns.srid
FROM pg_class
JOIN pg_namespace ON relnamespace=pg_namespace.oid
LEFT OUTER JOIN geometry_columns ON
relname=f_table_name AND nspname=f_table_schema
WHERE relkind IN ('r','v','m','p') """ \
+ schema_where + 'ORDER BY nspname, relname, \
f_geometry_column'
self._exec_sql(c, sql)
# Merge geometry info to "items"
for (i, geo_item) in enumerate(c.fetchall()):
if geo_item[7]:
items[i] = geo_item
return items
def get_table_rows(self, table, schema=None):
c = self.con.cursor()
self._exec_sql(c, 'SELECT COUNT(*) FROM %s' % self._table_name(schema,
table))
return c.fetchone()[0]
def get_table_fields(self, table, schema=None):
"""Return list of columns in table"""
c = self.con.cursor()
schema_where = (" AND nspname='%s' "
% self._quote_unicode(schema) if schema is not None else ''
)
sql = """SELECT a.attnum AS ordinal_position,
a.attname AS column_name,
t.typname AS data_type,
a.attlen AS char_max_len,
a.atttypmod AS modifier,
a.attnotnull AS notnull,
a.atthasdef AS hasdefault,
adef.adsrc AS default_value
FROM pg_class c
JOIN pg_attribute a ON a.attrelid = c.oid
JOIN pg_type t ON a.atttypid = t.oid
JOIN pg_namespace nsp ON c.relnamespace = nsp.oid
LEFT JOIN pg_attrdef adef ON adef.adrelid = a.attrelid
AND adef.adnum = a.attnum
WHERE
c.relname = '%s' %s AND
a.attnum > 0
ORDER BY a.attnum""" \
% (self._quote_unicode(table), schema_where)
self._exec_sql(c, sql)
attrs = []
for row in c.fetchall():
attrs.append(TableAttribute(row))
return attrs
def get_table_indexes(self, table, schema=None):
"""Get info about table's indexes. ignore primary key and unique
index, they get listed in constraints.
"""
c = self.con.cursor()
schema_where = (" AND nspname='%s' "
% self._quote_unicode(schema) if schema is not None else ''
)
sql = """SELECT relname, indkey
FROM pg_class, pg_index
WHERE pg_class.oid = pg_index.indexrelid AND pg_class.oid IN (
SELECT indexrelid
FROM pg_index, pg_class
JOIN pg_namespace nsp ON pg_class.relnamespace = nsp.oid
WHERE pg_class.relname='%s' %s AND
pg_class.oid=pg_index.indrelid
AND indisunique != 't' AND indisprimary != 't' )""" \
% (self._quote_unicode(table), schema_where)
self._exec_sql(c, sql)
indexes = []
for row in c.fetchall():
indexes.append(TableIndex(row))
return indexes
def get_table_constraints(self, table, schema=None):
c = self.con.cursor()
schema_where = (" AND nspname='%s' "
% self._quote_unicode(schema) if schema is not None else ''
)
sql = """SELECT c.conname, c.contype, c.condeferrable, c.condeferred,
array_to_string(c.conkey, ' '), c.consrc, t2.relname,
c.confupdtype, c.confdeltype, c.confmatchtype,
array_to_string(c.confkey, ' ')
FROM pg_constraint c
LEFT JOIN pg_class t ON c.conrelid = t.oid
LEFT JOIN pg_class t2 ON c.confrelid = t2.oid
JOIN pg_namespace nsp ON t.relnamespace = nsp.oid
WHERE t.relname = '%s' %s """ \
% (self._quote_unicode(table), schema_where)
self._exec_sql(c, sql)
constrs = []
for row in c.fetchall():
constrs.append(TableConstraint(row))
return constrs
def get_view_definition(self, view, schema=None):
"""Returns definition of the view."""
schema_where = (" AND nspname='%s' "
% self._quote_unicode(schema) if schema is not None else ''
)
sql = """SELECT pg_get_viewdef(c.oid)
FROM pg_class c
JOIN pg_namespace nsp ON c.relnamespace = nsp.oid
WHERE relname='%s' %s AND relkind IN ('v','m')""" \
% (self._quote_unicode(view), schema_where)
c = self.con.cursor()
self._exec_sql(c, sql)
return c.fetchone()[0]
def add_geometry_column(self, table, geom_type, schema=None,
geom_column='the_geom', srid=-1, dim=2):
# Use schema if explicitly specified
if schema:
schema_part = "'%s', " % self._quote_unicode(schema)
else:
schema_part = ''
sql = "SELECT AddGeometryColumn(%s'%s', '%s', %d, '%s', %d)" % (
schema_part,
self._quote_unicode(table),
self._quote_unicode(geom_column),
srid,
self._quote_unicode(geom_type),
dim,
)
self._exec_sql_and_commit(sql)
def delete_geometry_column(self, table, geom_column, schema=None):
"""Use PostGIS function to delete geometry column correctly."""
if schema:
schema_part = "'%s', " % self._quote_unicode(schema)
else:
schema_part = ''
sql = "SELECT DropGeometryColumn(%s'%s', '%s')" % (schema_part,
self._quote_unicode(table), self._quote_unicode(geom_column))
self._exec_sql_and_commit(sql)
def delete_geometry_table(self, table, schema=None):
"""Delete table with one or more geometries using PostGIS function."""
if schema:
schema_part = "'%s', " % self._quote_unicode(schema)
else:
schema_part = ''
sql = "SELECT DropGeometryTable(%s'%s')" % (schema_part,
self._quote_unicode(table))
self._exec_sql_and_commit(sql)
def create_table(self, table, fields, pkey=None, schema=None):
"""Create ordinary table.
'fields' is array containing instances of TableField
'pkey' contains name of column to be used as primary key
"""
if len(fields) == 0:
return False
table_name = self._table_name(schema, table)
sql = 'CREATE TABLE %s (%s' % (table_name, fields[0].field_def())
for field in fields[1:]:
sql += ', %s' % field.field_def()
if pkey:
sql += ', PRIMARY KEY (%s)' % self._quote(pkey)
sql += ')'
self._exec_sql_and_commit(sql)
return True
def delete_table(self, table, schema=None):
"""Delete table from the database."""
table_name = self._table_name(schema, table)
sql = 'DROP TABLE %s' % table_name
self._exec_sql_and_commit(sql)
def empty_table(self, table, schema=None):
"""Delete all rows from table."""
table_name = self._table_name(schema, table)
sql = 'DELETE FROM %s' % table_name
self._exec_sql_and_commit(sql)
def rename_table(self, table, new_table, schema=None):
"""Rename a table in database."""
table_name = self._table_name(schema, table)
sql = 'ALTER TABLE %s RENAME TO %s' % (table_name,
self._quote(new_table))
self._exec_sql_and_commit(sql)
# Update geometry_columns if PostGIS is enabled
if self.has_postgis:
sql = "UPDATE geometry_columns SET f_table_name='%s' \
WHERE f_table_name='%s'" \
% (self._quote_unicode(new_table), self._quote_unicode(table))
if schema is not None:
sql += " AND f_table_schema='%s'" % self._quote_unicode(schema)
self._exec_sql_and_commit(sql)
def create_view(self, name, query, schema=None):
view_name = self._table_name(schema, name)
sql = 'CREATE VIEW %s AS %s' % (view_name, query)
self._exec_sql_and_commit(sql)
def delete_view(self, name, schema=None):
view_name = self._table_name(schema, name)
sql = 'DROP VIEW %s' % view_name
self._exec_sql_and_commit(sql)
def rename_view(self, name, new_name, schema=None):
"""Rename view in database."""
self.rename_table(name, new_name, schema)
def create_schema(self, schema):
"""Create a new empty schema in database."""
sql = 'CREATE SCHEMA %s' % self._quote(schema)
self._exec_sql_and_commit(sql)
def delete_schema(self, schema):
"""Drop (empty) schema from database."""
sql = 'DROP SCHEMA %s' % self._quote(schema)
self._exec_sql_and_commit(sql)
def rename_schema(self, schema, new_schema):
"""Rename a schema in database."""
sql = 'ALTER SCHEMA %s RENAME TO %s' % (self._quote(schema),
self._quote(new_schema))
self._exec_sql_and_commit(sql)
# Update geometry_columns if PostGIS is enabled
if self.has_postgis:
sql = \
"UPDATE geometry_columns SET f_table_schema='%s' \
WHERE f_table_schema='%s'" \
% (self._quote_unicode(new_schema), self._quote_unicode(schema))
self._exec_sql_and_commit(sql)
def table_add_column(self, table, field, schema=None):
"""Add a column to table (passed as TableField instance)."""
table_name = self._table_name(schema, table)
sql = 'ALTER TABLE %s ADD %s' % (table_name, field.field_def())
self._exec_sql_and_commit(sql)
def table_delete_column(self, table, field, schema=None):
"""Delete column from a table."""
table_name = self._table_name(schema, table)
sql = 'ALTER TABLE %s DROP %s' % (table_name, self._quote(field))
self._exec_sql_and_commit(sql)
def table_column_rename(self, table, name, new_name, schema=None):
"""Rename column in a table."""
table_name = self._table_name(schema, table)
sql = 'ALTER TABLE %s RENAME %s TO %s' % (table_name,
self._quote(name), self._quote(new_name))
self._exec_sql_and_commit(sql)
# Update geometry_columns if PostGIS is enabled
if self.has_postgis:
sql = "UPDATE geometry_columns SET f_geometry_column='%s' \
WHERE f_geometry_column='%s' AND f_table_name='%s'" \
% (self._quote_unicode(new_name), self._quote_unicode(name),
self._quote_unicode(table))
if schema is not None:
sql += " AND f_table_schema='%s'" % self._quote(schema)
self._exec_sql_and_commit(sql)
def table_column_set_type(self, table, column, data_type, schema=None):
"""Change column type."""
table_name = self._table_name(schema, table)
sql = 'ALTER TABLE %s ALTER %s TYPE %s' % (table_name,
self._quote(column), data_type)
self._exec_sql_and_commit(sql)
def table_column_set_default(self, table, column, default, schema=None):
"""Change column's default value.
If default=None drop default value.
"""
table_name = self._table_name(schema, table)
if default:
sql = 'ALTER TABLE %s ALTER %s SET DEFAULT %s' % (table_name,
self._quote(column), default)
else:
sql = 'ALTER TABLE %s ALTER %s DROP DEFAULT' % (table_name,
self._quote(column))
self._exec_sql_and_commit(sql)
def table_column_set_null(self, table, column, is_null, schema=None):
"""Change whether column can contain null values."""
table_name = self._table_name(schema, table)
sql = 'ALTER TABLE %s ALTER %s ' % (table_name, self._quote(column))
if is_null:
sql += 'DROP NOT NULL'
else:
sql += 'SET NOT NULL'
self._exec_sql_and_commit(sql)
def table_add_primary_key(self, table, column, schema=None):
"""Add a primery key (with one column) to a table."""
table_name = self._table_name(schema, table)
sql = 'ALTER TABLE %s ADD PRIMARY KEY (%s)' % (table_name,
self._quote(column))
self._exec_sql_and_commit(sql)
def table_add_unique_constraint(self, table, column, schema=None):
"""Add a unique constraint to a table."""
table_name = self._table_name(schema, table)
sql = 'ALTER TABLE %s ADD UNIQUE (%s)' % (table_name,
self._quote(column))
self._exec_sql_and_commit(sql)
def table_delete_constraint(self, table, constraint, schema=None):
"""Delete constraint in a table."""
table_name = self._table_name(schema, table)
sql = 'ALTER TABLE %s DROP CONSTRAINT %s' % (table_name,
self._quote(constraint))
self._exec_sql_and_commit(sql)
def table_move_to_schema(self, table, new_schema, schema=None):
if new_schema == schema:
return
table_name = self._table_name(schema, table)
sql = 'ALTER TABLE %s SET SCHEMA %s' % (table_name,
self._quote(new_schema))
self._exec_sql_and_commit(sql)
# Update geometry_columns if PostGIS is enabled
if self.has_postgis:
sql = "UPDATE geometry_columns SET f_table_schema='%s' \
WHERE f_table_name='%s'" \
% (self._quote_unicode(new_schema), self._quote_unicode(table))
if schema is not None:
sql += " AND f_table_schema='%s'" % self._quote_unicode(schema)
self._exec_sql_and_commit(sql)
def create_index(self, table, name, column, schema=None):
"""Create index on one column using default options."""
table_name = self._table_name(schema, table)
idx_name = self._quote(name)
sql = 'CREATE INDEX %s ON %s (%s)' % (idx_name, table_name,
self._quote(column))
self._exec_sql_and_commit(sql)
def create_spatial_index(self, table, schema=None, geom_column='the_geom'):
table_name = self._table_name(schema, table)
idx_name = self._quote(u"sidx_%s_%s" % (table, geom_column))
sql = 'CREATE INDEX %s ON %s USING GIST(%s)' % (idx_name, table_name,
self._quote(geom_column))
self._exec_sql_and_commit(sql)
def delete_index(self, name, schema=None):
index_name = self._table_name(schema, name)
sql = 'DROP INDEX %s' % index_name
self._exec_sql_and_commit(sql)
def get_database_privileges(self):
"""DB privileges: (can create schemas, can create temp. tables).
"""
sql = "SELECT has_database_privilege('%(d)s', 'CREATE'), \
has_database_privilege('%(d)s', 'TEMP')" \
% {'d': self._quote_unicode(self.uri.database())}
c = self.con.cursor()
self._exec_sql(c, sql)
return c.fetchone()
def get_schema_privileges(self, schema):
"""Schema privileges: (can create new objects, can access objects
in schema)."""
sql = "SELECT has_schema_privilege('%(s)s', 'CREATE'), \
has_schema_privilege('%(s)s', 'USAGE')" \
% {'s': self._quote_unicode(schema)}
c = self.con.cursor()
self._exec_sql(c, sql)
return c.fetchone()
def get_table_privileges(self, table, schema=None):
"""Table privileges: (select, insert, update, delete).
"""
t = self._table_name(schema, table)
sql = """SELECT has_table_privilege('%(t)s', 'SELECT'),
has_table_privilege('%(t)s', 'INSERT'),
has_table_privilege('%(t)s', 'UPDATE'),
has_table_privilege('%(t)s', 'DELETE')""" \
% {'t': self._quote_unicode(t)}
c = self.con.cursor()
self._exec_sql(c, sql)
return c.fetchone()
def vacuum_analyze(self, table, schema=None):
"""Run VACUUM ANALYZE on a table."""
t = self._table_name(schema, table)
# VACUUM ANALYZE must be run outside transaction block - we
# have to change isolation level
self.con.set_isolation_level(
psycopg2.extensions.ISOLATION_LEVEL_AUTOCOMMIT)
c = self.con.cursor()
self._exec_sql(c, 'VACUUM ANALYZE %s' % t)
self.con.set_isolation_level(
psycopg2.extensions.ISOLATION_LEVEL_READ_COMMITTED)
def sr_info_for_srid(self, srid):
if not self.has_postgis:
return 'Unknown'
try:
c = self.con.cursor()
self._exec_sql(c,
"SELECT srtext FROM spatial_ref_sys WHERE srid = '%d'"
% srid)
srtext = c.fetchone()[0]
# Try to extract just SR name (should be quoted in double
# quotes)
x = re.search('"([^"]+)"', srtext)
if x is not None:
srtext = x.group()
return srtext
except DbError:
return 'Unknown'
def insert_table_row(self, table, values, schema=None, cursor=None):
"""Insert a row with specified values to a table.
If a cursor is specified, it doesn't commit (expecting that
there will be more inserts) otherwise it commits immediately.
"""
t = self._table_name(schema, table)
sql = ''
for value in values:
# TODO: quote values?
if sql:
sql += ', '
sql += value
sql = 'INSERT INTO %s VALUES (%s)' % (t, sql)
if cursor:
self._exec_sql(cursor, sql)
else:
self._exec_sql_and_commit(sql)
def _exec_sql(self, cursor, sql):
try:
cursor.execute(sql)
except psycopg2.Error as e:
raise QgsProcessingException(str(e) + ' QUERY: ' +
e.cursor.query.decode(e.cursor.connection.encoding))
def _exec_sql_and_commit(self, sql):
"""Tries to execute and commit some action, on error it rolls
back the change.
"""
try:
c = self.con.cursor()
self._exec_sql(c, sql)
self.con.commit()
except DbError:
self.con.rollback()
raise
def _quote(self, identifier):
"""Quote identifier if needed."""
# Make sure it's python unicode string
identifier = str(identifier)
# Is it needed to quote the identifier?
if self.re_ident_ok.match(identifier) is not None:
return identifier
# It's needed - let's quote it (and double the double-quotes)
return u'"%s"' % identifier.replace('"', '""')
def _quote_unicode(self, txt):
"""Make the string safe - replace ' with ''.
"""
# make sure it's python unicode string
txt = str(txt)
return txt.replace("'", "''")
def _table_name(self, schema, table):
if not schema:
return self._quote(table)
else:
return u'%s.%s' % (self._quote(schema), self._quote(table))
def ogrConnectionStringAndFormat(uri, context):
"""Generates OGR connection string and format string from layer source
Returned values are a tuple of the connection string and format string
"""
ogrstr = None
format = None
layer = QgsProcessingUtils.mapLayerFromString(uri, context, False)
if layer is None:
path, ext = os.path.splitext(uri)
format = QgsVectorFileWriter.driverForExtension(ext)
return '"' + uri + '"', '"' + format + '"'
provider = layer.dataProvider().name()
if provider == 'spatialite':
# dbname='/geodata/osm_ch.sqlite' table="places" (Geometry) sql=
regex = re.compile("dbname='(.+)'")
r = regex.search(str(layer.source()))
ogrstr = r.groups()[0]
format = 'SQLite'
elif provider == 'postgres':
# dbname='ktryjh_iuuqef' host=spacialdb.com port=9999
# user='******' password='******' sslmode=disable
# key='gid' estimatedmetadata=true srid=4326 type=MULTIPOLYGON
# table="t4" (geom) sql=
dsUri = QgsDataSourceUri(layer.dataProvider().dataSourceUri())
conninfo = dsUri.connectionInfo()
conn = None
ok = False
while not conn:
try:
conn = psycopg2.connect(dsUri.connectionInfo())
except psycopg2.OperationalError:
(ok, user, passwd) = QgsCredentials.instance().get(
conninfo, dsUri.username(), dsUri.password())
if not ok:
break
dsUri.setUsername(user)
dsUri.setPassword(passwd)
if not conn:
raise RuntimeError(
'Could not connect to PostgreSQL database - check connection info'
)
if ok:
QgsCredentials.instance().put(conninfo, user, passwd)
ogrstr = "PG:%s" % dsUri.connectionInfo()
format = 'PostgreSQL'
elif provider == "oracle":
# OCI:user/password@host:port/service:table
dsUri = QgsDataSourceUri(layer.dataProvider().dataSourceUri())
ogrstr = "OCI:"
if dsUri.username() != "":
ogrstr += dsUri.username()
if dsUri.password() != "":
ogrstr += "/" + dsUri.password()
delim = "@"
if dsUri.host() != "":
ogrstr += delim + dsUri.host()
delim = ""
if dsUri.port() != "" and dsUri.port() != '1521':
ogrstr += ":" + dsUri.port()
ogrstr += "/"
if dsUri.database() != "":
ogrstr += dsUri.database()
elif dsUri.database() != "":
ogrstr += delim + dsUri.database()
if ogrstr == "OCI:":
raise RuntimeError(
'Invalid oracle data source - check connection info')
ogrstr += ":"
if dsUri.schema() != "":
ogrstr += dsUri.schema() + "."
ogrstr += dsUri.table()
format = 'OCI'
else:
ogrstr = str(layer.source()).split("|")[0]
path, ext = os.path.splitext(ogrstr)
format = QgsVectorFileWriter.driverForExtension(ext)
return '"' + ogrstr + '"', '"' + format + '"'
def ogrConnectionString(uri):
"""Generates OGR connection sting from layer source
"""
ogrstr = None
layer = dataobjects.getObjectFromUri(uri, False)
if layer is None:
return '"' + uri + '"'
provider = layer.dataProvider().name()
if provider == "spatialite":
# dbname='/geodata/osm_ch.sqlite' table="places" (Geometry) sql=
regex = re.compile("dbname='(.+)'")
r = regex.search(str(layer.source()))
ogrstr = r.groups()[0]
elif provider == "postgres":
# dbname='ktryjh_iuuqef' host=spacialdb.com port=9999
# user='******' password='******' sslmode=disable
# key='gid' estimatedmetadata=true srid=4326 type=MULTIPOLYGON
# table="t4" (geom) sql=
dsUri = QgsDataSourceUri(layer.dataProvider().dataSourceUri())
conninfo = dsUri.connectionInfo()
conn = None
ok = False
while not conn:
try:
conn = psycopg2.connect(dsUri.connectionInfo())
except psycopg2.OperationalError:
(ok, user, passwd) = QgsCredentials.instance().get(conninfo, dsUri.username(), dsUri.password())
if not ok:
break
dsUri.setUsername(user)
dsUri.setPassword(passwd)
if not conn:
raise RuntimeError("Could not connect to PostgreSQL database - check connection info")
if ok:
QgsCredentials.instance().put(conninfo, user, passwd)
ogrstr = "PG:%s" % dsUri.connectionInfo()
elif provider == "oracle":
# OCI:user/password@host:port/service:table
dsUri = QgsDataSourceUri(layer.dataProvider().dataSourceUri())
ogrstr = "OCI:"
if dsUri.username() != "":
ogrstr += dsUri.username()
if dsUri.password() != "":
ogrstr += "/" + dsUri.password()
delim = "@"
if dsUri.host() != "":
ogrstr += delim + dsUri.host()
delim = ""
if dsUri.port() != "" and dsUri.port() != "1521":
ogrstr += ":" + dsUri.port()
ogrstr += "/"
if dsUri.database() != "":
ogrstr += dsUri.database()
elif dsUri.database() != "":
ogrstr += delim + dsUri.database()
if ogrstr == "OCI:":
raise RuntimeError("Invalid oracle data source - check connection info")
ogrstr += ":"
if dsUri.schema() != "":
ogrstr += dsUri.schema() + "."
ogrstr += dsUri.table()
else:
ogrstr = str(layer.source()).split("|")[0]
return '"' + ogrstr + '"'
def ogrConnectionString(uri):
"""Generates OGR connection sting from layer source
"""
ogrstr = None
layer = dataobjects.getObjectFromUri(uri, False)
if layer is None:
return '"' + uri + '"'
provider = layer.dataProvider().name()
if provider == 'spatialite':
# dbname='/geodata/osm_ch.sqlite' table="places" (Geometry) sql=
regex = re.compile("dbname='(.+)'")
r = regex.search(unicode(layer.source()))
ogrstr = r.groups()[0]
elif provider == 'postgres':
# dbname='ktryjh_iuuqef' host=spacialdb.com port=9999
# user='******' password='******' sslmode=disable
# key='gid' estimatedmetadata=true srid=4326 type=MULTIPOLYGON
# table="t4" (geom) sql=
dsUri = QgsDataSourceUri(layer.dataProvider().dataSourceUri())
conninfo = dsUri.connectionInfo()
conn = None
ok = False
while not conn:
try:
conn = psycopg2.connect(dsUri.connectionInfo())
except psycopg2.OperationalError:
(ok, user, passwd) = QgsCredentials.instance().get(
conninfo, dsUri.username(), dsUri.password())
if not ok:
break
dsUri.setUsername(user)
dsUri.setPassword(passwd)
if not conn:
raise RuntimeError(
'Could not connect to PostgreSQL database - check connection info'
)
if ok:
QgsCredentials.instance().put(conninfo, user, passwd)
ogrstr = "PG:%s" % dsUri.connectionInfo()
elif provider == "oracle":
# OCI:user/password@host:port/service:table
dsUri = QgsDataSourceUri(layer.dataProvider().dataSourceUri())
ogrstr = "OCI:"
if dsUri.username() != "":
ogrstr += dsUri.username()
if dsUri.password() != "":
ogrstr += "/" + dsUri.password()
delim = "@"
if dsUri.host() != "":
ogrstr += delim + dsUri.host()
delim = ""
if dsUri.port() != "" and dsUri.port() != '1521':
ogrstr += ":" + dsUri.port()
ogrstr += "/"
if dsUri.database() != "":
ogrstr += dsUri.database()
elif dsUri.database() != "":
ogrstr += delim + dsUri.database()
if ogrstr == "OCI:":
raise RuntimeError(
'Invalid oracle data source - check connection info')
ogrstr += ":"
if dsUri.schema() != "":
ogrstr += dsUri.schema() + "."
ogrstr += dsUri.table()
else:
ogrstr = unicode(layer.source()).split("|")[0]
return '"' + ogrstr + '"'
def ogrConnectionStringAndFormatFromLayer(layer):
provider = layer.dataProvider().name()
if provider == 'spatialite':
# dbname='/geodata/osm_ch.sqlite' table="places" (Geometry) sql=
regex = re.compile("dbname='(.+)'")
r = regex.search(str(layer.source()))
ogrstr = r.groups()[0]
format = 'SQLite'
elif provider == 'postgres':
# dbname='ktryjh_iuuqef' host=spacialdb.com port=9999
# user='******' password='******' sslmode=disable
# key='gid' estimatedmetadata=true srid=4326 type=MULTIPOLYGON
# table="t4" (geom) sql=
dsUri = QgsDataSourceUri(layer.dataProvider().dataSourceUri())
conninfo = dsUri.connectionInfo()
conn = None
ok = False
while not conn:
try:
conn = psycopg2.connect(dsUri.connectionInfo())
except psycopg2.OperationalError:
(ok, user, passwd) = QgsCredentials.instance().get(
conninfo, dsUri.username(), dsUri.password())
if not ok:
break
dsUri.setUsername(user)
dsUri.setPassword(passwd)
if not conn:
raise RuntimeError(
'Could not connect to PostgreSQL database - check connection info'
)
if ok:
QgsCredentials.instance().put(conninfo, user, passwd)
ogrstr = "PG:%s" % dsUri.connectionInfo()
format = 'PostgreSQL'
elif provider == 'mssql':
#'dbname=\'db_name\' host=myHost estimatedmetadata=true
# srid=27700 type=MultiPolygon table="dbo"."my_table"
# #(Shape) sql='
dsUri = layer.dataProvider().uri()
ogrstr = 'MSSQL:'
ogrstr += 'database={0};'.format(dsUri.database())
ogrstr += 'server={0};'.format(dsUri.host())
if dsUri.username() != "":
ogrstr += 'uid={0};'.format(dsUri.username())
else:
ogrstr += 'trusted_connection=yes;'
if dsUri.password() != '':
ogrstr += 'pwd={0};'.format(dsUri.password())
ogrstr += 'tables={0}'.format(dsUri.table())
format = 'MSSQL'
elif provider == "oracle":
# OCI:user/password@host:port/service:table
dsUri = QgsDataSourceUri(layer.dataProvider().dataSourceUri())
ogrstr = "OCI:"
if dsUri.username() != "":
ogrstr += dsUri.username()
if dsUri.password() != "":
ogrstr += "/" + dsUri.password()
delim = "@"
if dsUri.host() != "":
ogrstr += delim + dsUri.host()
delim = ""
if dsUri.port() != "" and dsUri.port() != '1521':
ogrstr += ":" + dsUri.port()
ogrstr += "/"
if dsUri.database() != "":
ogrstr += dsUri.database()
elif dsUri.database() != "":
ogrstr += delim + dsUri.database()
if ogrstr == "OCI:":
raise RuntimeError(
'Invalid oracle data source - check connection info')
ogrstr += ":"
if dsUri.schema() != "":
ogrstr += dsUri.schema() + "."
ogrstr += dsUri.table()
format = 'OCI'
else:
ogrstr = str(layer.source()).split("|")[0]
path, ext = os.path.splitext(ogrstr)
format = QgsVectorFileWriter.driverForExtension(ext)
return ogrstr, '"' + format + '"'
def processAlgorithm(self, parameters, context, feedback):
database = self.parameterAsVectorLayer(parameters, self.DATABASE,
context)
databaseuri = database.dataProvider().dataSourceUri()
uri = QgsDataSourceUri(databaseuri)
if uri.database() is '':
if '|layername' in databaseuri:
databaseuri = databaseuri[:databaseuri.find('|layername')]
elif '|layerid' in databaseuri:
databaseuri = databaseuri[:databaseuri.find('|layerid')]
uri = QgsDataSourceUri('dbname=\'%s\'' % (databaseuri))
db = spatialite.GeoDB(uri)
overwrite = self.parameterAsBool(parameters, self.OVERWRITE, context)
createIndex = self.parameterAsBool(parameters, self.CREATEINDEX,
context)
convertLowerCase = self.parameterAsBool(parameters,
self.LOWERCASE_NAMES, context)
dropStringLength = self.parameterAsBool(parameters,
self.DROP_STRING_LENGTH,
context)
forceSinglePart = self.parameterAsBool(parameters,
self.FORCE_SINGLEPART, context)
primaryKeyField = self.parameterAsString(parameters, self.PRIMARY_KEY,
context) or 'id'
encoding = self.parameterAsString(parameters, self.ENCODING, context)
source = self.parameterAsSource(parameters, self.INPUT, context)
table = self.parameterAsString(parameters, self.TABLENAME, context)
if table:
table.strip()
if not table or table == '':
table = source.sourceName()
table = table.replace('.', '_')
table = table.replace(' ', '').lower()
providerName = 'spatialite'
geomColumn = self.parameterAsString(parameters, self.GEOMETRY_COLUMN,
context)
if not geomColumn:
geomColumn = 'geom'
options = {}
if overwrite:
options['overwrite'] = True
if convertLowerCase:
options['lowercaseFieldNames'] = True
geomColumn = geomColumn.lower()
if dropStringLength:
options['dropStringConstraints'] = True
if forceSinglePart:
options['forceSinglePartGeometryType'] = True
# Clear geometry column for non-geometry tables
if source.wkbType() == QgsWkbTypes.NoGeometry:
geomColumn = None
uri = db.uri
uri.setDataSource('', table, geomColumn, '', primaryKeyField)
if encoding:
options['fileEncoding'] = encoding
exporter = QgsVectorLayerExporter(uri.uri(), providerName,
source.fields(), source.wkbType(),
source.sourceCrs(), overwrite,
options)
if exporter.errorCode() != QgsVectorLayerExporter.NoError:
raise QgsProcessingException(
self.tr('Error importing to Spatialite\n{0}').format(
exporter.errorMessage()))
features = source.getFeatures()
total = 100.0 / source.featureCount() if source.featureCount() else 0
for current, f in enumerate(features):
if feedback.isCanceled():
break
if not exporter.addFeature(f, QgsFeatureSink.FastInsert):
feedback.reportError(exporter.errorMessage())
feedback.setProgress(int(current * total))
exporter.flushBuffer()
if exporter.errorCode() != QgsVectorLayerExporter.NoError:
raise QgsProcessingException(
self.tr('Error importing to Spatialite\n{0}').format(
exporter.errorMessage()))
if geomColumn and createIndex:
db.create_spatial_index(table, geomColumn)
return {}
def __init__(self,
destination,
encoding,
fields,
geometryType,
crs,
options=None):
self.destination = destination
self.isNotFileBased = False
self.layer = None
self.writer = None
if encoding is None:
settings = QSettings()
encoding = settings.value('/Processing/encoding',
'System',
type=str)
if self.destination.startswith(self.MEMORY_LAYER_PREFIX):
self.isNotFileBased = True
uri = GEOM_TYPE_MAP[geometryType] + "?uuid=" + unicode(
uuid.uuid4())
if crs.isValid():
uri += '&crs=' + crs.authid()
fieldsdesc = []
for f in fields:
qgsfield = _toQgsField(f)
fieldsdesc.append(
'field=%s:%s' %
(qgsfield.name(),
TYPE_MAP_MEMORY_LAYER.get(qgsfield.type(), "string")))
if fieldsdesc:
uri += '&' + '&'.join(fieldsdesc)
self.layer = QgsVectorLayer(uri, self.destination, 'memory')
self.writer = self.layer.dataProvider()
elif self.destination.startswith(self.POSTGIS_LAYER_PREFIX):
self.isNotFileBased = True
uri = QgsDataSourceUri(
self.destination[len(self.POSTGIS_LAYER_PREFIX):])
connInfo = uri.connectionInfo()
(success, user,
passwd) = QgsCredentials.instance().get(connInfo, None, None)
if success:
QgsCredentials.instance().put(connInfo, user, passwd)
else:
raise GeoAlgorithmExecutionException(
"Couldn't connect to database")
# fix_print_with_import
print(uri.uri())
try:
db = postgis.GeoDB(host=uri.host(),
port=int(uri.port()),
dbname=uri.database(),
user=user,
passwd=passwd)
except postgis.DbError as e:
raise GeoAlgorithmExecutionException(
"Couldn't connect to database:\n%s" % e.message)
def _runSQL(sql):
try:
db._exec_sql_and_commit(unicode(sql))
except postgis.DbError as e:
raise GeoAlgorithmExecutionException(
'Error creating output PostGIS table:\n%s' % e.message)
fields = [_toQgsField(f) for f in fields]
fieldsdesc = ",".join(
'%s %s' %
(f.name(), TYPE_MAP_POSTGIS_LAYER.get(f.type(), "VARCHAR"))
for f in fields)
_runSQL("CREATE TABLE %s.%s (%s)" %
(uri.schema(), uri.table().lower(), fieldsdesc))
if geometryType != QgsWkbTypes.NullGeometry:
_runSQL(
"SELECT AddGeometryColumn('{schema}', '{table}', 'the_geom', {srid}, '{typmod}', 2)"
.format(table=uri.table().lower(),
schema=uri.schema(),
srid=crs.authid().split(":")[-1],
typmod=GEOM_TYPE_MAP[geometryType].upper()))
self.layer = QgsVectorLayer(uri.uri(), uri.table(), "postgres")
self.writer = self.layer.dataProvider()
elif self.destination.startswith(self.SPATIALITE_LAYER_PREFIX):
self.isNotFileBased = True
uri = QgsDataSourceUri(
self.destination[len(self.SPATIALITE_LAYER_PREFIX):])
# fix_print_with_import
print(uri.uri())
try:
db = spatialite.GeoDB(uri=uri)
except spatialite.DbError as e:
raise GeoAlgorithmExecutionException(
"Couldn't connect to database:\n%s" % e.message)
def _runSQL(sql):
try:
db._exec_sql_and_commit(unicode(sql))
except spatialite.DbError as e:
raise GeoAlgorithmExecutionException(
'Error creating output Spatialite table:\n%s' %
unicode(e))
fields = [_toQgsField(f) for f in fields]
fieldsdesc = ",".join(
'%s %s' %
(f.name(), TYPE_MAP_SPATIALITE_LAYER.get(f.type(), "VARCHAR"))
for f in fields)
_runSQL("DROP TABLE IF EXISTS %s" % uri.table().lower())
_runSQL("CREATE TABLE %s (%s)" % (uri.table().lower(), fieldsdesc))
if geometryType != QgsWkbTypes.NullGeometry:
_runSQL(
"SELECT AddGeometryColumn('{table}', 'the_geom', {srid}, '{typmod}', 2)"
.format(table=uri.table().lower(),
srid=crs.authid().split(":")[-1],
typmod=GEOM_TYPE_MAP[geometryType].upper()))
self.layer = QgsVectorLayer(uri.uri(), uri.table(), "spatialite")
self.writer = self.layer.dataProvider()
else:
formats = QgsVectorFileWriter.supportedFiltersAndFormats()
OGRCodes = {}
for (key, value) in formats.items():
extension = unicode(key)
extension = extension[extension.find('*.') + 2:]
extension = extension[:extension.find(' ')]
OGRCodes[extension] = value
OGRCodes['dbf'] = "DBF file"
extension = self.destination[self.destination.rfind('.') + 1:]
if extension not in OGRCodes:
extension = 'shp'
self.destination = self.destination + '.shp'
if geometryType == QgsWkbTypes.NoGeometry:
if extension == 'shp':
extension = 'dbf'
self.destination = self.destination[:self.destination.
rfind('.')] + '.dbf'
if extension not in self.nogeometry_extensions:
raise GeoAlgorithmExecutionException(
"Unsupported format for tables with no geometry")
qgsfields = QgsFields()
for field in fields:
qgsfields.append(_toQgsField(field))
# use default dataset/layer options
dataset_options = QgsVectorFileWriter.defaultDatasetOptions(
OGRCodes[extension])
layer_options = QgsVectorFileWriter.defaultLayerOptions(
OGRCodes[extension])
self.writer = QgsVectorFileWriter(self.destination, encoding,
qgsfields, geometryType, crs,
OGRCodes[extension],
dataset_options, layer_options)
def processAlgorithm(self, parameters, context, feedback):
database = self.parameterAsVectorLayer(parameters, self.DATABASE, context)
databaseuri = database.dataProvider().dataSourceUri()
uri = QgsDataSourceUri(databaseuri)
if uri.database() is '':
if '|layerid' in databaseuri:
databaseuri = databaseuri[:databaseuri.find('|layerid')]
uri = QgsDataSourceUri('dbname=\'%s\'' % (databaseuri))
db = spatialite.GeoDB(uri)
overwrite = self.parameterAsBool(parameters, self.OVERWRITE, context)
createIndex = self.parameterAsBool(parameters, self.CREATEINDEX, context)
convertLowerCase = self.parameterAsBool(parameters, self.LOWERCASE_NAMES, context)
dropStringLength = self.parameterAsBool(parameters, self.DROP_STRING_LENGTH, context)
forceSinglePart = self.parameterAsBool(parameters, self.FORCE_SINGLEPART, context)
primaryKeyField = self.parameterAsString(parameters, self.PRIMARY_KEY, context) or 'id'
encoding = self.parameterAsString(parameters, self.ENCODING, context)
source = self.parameterAsSource(parameters, self.INPUT, context)
table = self.parameterAsString(parameters, self.TABLENAME, context)
if table:
table.strip()
if not table or table == '':
table = source.sourceName()
table = table.replace('.', '_')
table = table.replace(' ', '').lower()
providerName = 'spatialite'
geomColumn = self.parameterAsString(parameters, self.GEOMETRY_COLUMN, context)
if not geomColumn:
geomColumn = 'geom'
options = {}
if overwrite:
options['overwrite'] = True
if convertLowerCase:
options['lowercaseFieldNames'] = True
geomColumn = geomColumn.lower()
if dropStringLength:
options['dropStringConstraints'] = True
if forceSinglePart:
options['forceSinglePartGeometryType'] = True
# Clear geometry column for non-geometry tables
if source.wkbType() == QgsWkbTypes.NoGeometry:
geomColumn = None
uri = db.uri
uri.setDataSource('', table, geomColumn, '', primaryKeyField)
if encoding:
options['fileEncoding'] = encoding
exporter = QgsVectorLayerExporter(uri.uri(), providerName, source.fields(),
source.wkbType(), source.sourceCrs(), overwrite, options)
if exporter.errorCode() != QgsVectorLayerExporter.NoError:
raise QgsProcessingException(
self.tr('Error importing to Spatialite\n{0}').format(exporter.errorMessage()))
features = source.getFeatures()
total = 100.0 / source.featureCount() if source.featureCount() else 0
for current, f in enumerate(features):
if feedback.isCanceled():
break
if not exporter.addFeature(f, QgsFeatureSink.FastInsert):
feedback.reportError(exporter.errorMessage())
feedback.setProgress(int(current * total))
exporter.flushBuffer()
if exporter.errorCode() != QgsVectorLayerExporter.NoError:
raise QgsProcessingException(
self.tr('Error importing to Spatialite\n{0}').format(exporter.errorMessage()))
if geomColumn and createIndex:
db.create_spatial_index(table, geomColumn)
return {}
def processAlgorithm(self, parameters, context, feedback):
database = self.getParameterValue(self.DATABASE)
uri = QgsDataSourceUri(database)
if uri.database() is '':
if '|layerid' in database:
database = database[:database.find('|layerid')]
uri = QgsDataSourceUri('dbname=\'%s\'' % (database))
db = spatialite.GeoDB(uri)
overwrite = self.getParameterValue(self.OVERWRITE)
createIndex = self.getParameterValue(self.CREATEINDEX)
convertLowerCase = self.getParameterValue(self.LOWERCASE_NAMES)
dropStringLength = self.getParameterValue(self.DROP_STRING_LENGTH)
forceSinglePart = self.getParameterValue(self.FORCE_SINGLEPART)
primaryKeyField = self.getParameterValue(self.PRIMARY_KEY) or 'id'
encoding = self.getParameterValue(self.ENCODING)
layerUri = self.getParameterValue(self.INPUT)
layer = QgsProcessingUtils.mapLayerFromString(layerUri, context)
table = self.getParameterValue(self.TABLENAME)
if table:
table.strip()
if not table or table == '':
table = layer.name()
table = table.replace(' ', '').lower()
providerName = 'spatialite'
geomColumn = self.getParameterValue(self.GEOMETRY_COLUMN)
if not geomColumn:
geomColumn = 'the_geom'
options = {}
if overwrite:
options['overwrite'] = True
if convertLowerCase:
options['lowercaseFieldNames'] = True
geomColumn = geomColumn.lower()
if dropStringLength:
options['dropStringConstraints'] = True
if forceSinglePart:
options['forceSinglePartGeometryType'] = True
# Clear geometry column for non-geometry tables
if not layer.hasGeometryType():
geomColumn = None
uri = db.uri
uri.setDataSource('', table, geomColumn, '', primaryKeyField)
if encoding:
layer.setProviderEncoding(encoding)
(ret, errMsg) = QgsVectorLayerExporter.exportLayer(
layer,
uri.uri(),
providerName,
self.crs,
False,
options,
)
if ret != 0:
raise GeoAlgorithmExecutionException(
self.tr('Error importing to Spatialite\n{0}').format(errMsg))
if geomColumn and createIndex:
db.create_spatial_index(table, geomColumn)