def sync_table(mssql_conn, config, catalog_entry, state, columns):
mssql_conn = MSSQLConnection(config)
common.whitelist_bookmark_keys(BOOKMARK_KEYS, catalog_entry.tap_stream_id,
state)
catalog_metadata = metadata.to_map(catalog_entry.metadata)
stream_metadata = catalog_metadata.get((), {})
replication_key_metadata = stream_metadata.get("replication-key")
replication_key_state = singer.get_bookmark(state,
catalog_entry.tap_stream_id,
"replication_key")
replication_key_value = None
if replication_key_metadata == replication_key_state:
replication_key_value = singer.get_bookmark(
state, catalog_entry.tap_stream_id, "replication_key_value")
else:
state = singer.write_bookmark(state, catalog_entry.tap_stream_id,
"replication_key",
replication_key_metadata)
state = singer.clear_bookmark(state, catalog_entry.tap_stream_id,
"replication_key_value")
stream_version = common.get_stream_version(catalog_entry.tap_stream_id,
state)
state = singer.write_bookmark(state, catalog_entry.tap_stream_id,
"version", stream_version)
activate_version_message = singer.ActivateVersionMessage(
stream=catalog_entry.stream, version=stream_version)
singer.write_message(activate_version_message)
LOGGER.info("Beginning SQL")
with connect_with_backoff(mssql_conn) as open_conn:
with open_conn.cursor() as cur:
select_sql = common.generate_select_sql(catalog_entry, columns)
params = {}
if replication_key_value is not None:
if catalog_entry.schema.properties[
replication_key_metadata].format == "date-time":
replication_key_value = pendulum.parse(
replication_key_value)
select_sql += " WHERE \"{}\" >= %(replication_key_value)s ORDER BY \"{}\" ASC".format(
replication_key_metadata, replication_key_metadata)
params["replication_key_value"] = replication_key_value
elif replication_key_metadata is not None:
select_sql += " ORDER BY \"{}\" ASC".format(
replication_key_metadata)
common.sync_query(cur, catalog_entry, state, select_sql, columns,
stream_version, params)
def log_server_params(mssql_conn):
with connect_with_backoff(mssql_conn) as open_conn:
try:
with open_conn.cursor() as cur:
cur.execute("""SELECT @@VERSION as version, @@lock_timeout as lock_wait_timeout""")
row = cur.fetchone()
LOGGER.info(
"Server Parameters: " + "version: %s, " + "lock_timeout: %s, ", *row,
)
except:
LOGGER.warning("Encountered error checking server params. Error: (%s) %s", *e.args)
def sync_table(mssql_conn, catalog_entry, state, columns, stream_version):
common.whitelist_bookmark_keys(generate_bookmark_keys(catalog_entry),
catalog_entry.tap_stream_id, state)
bookmark = state.get('bookmarks', {}).get(catalog_entry.tap_stream_id, {})
version_exists = True if 'version' in bookmark else False
initial_full_table_complete = singer.get_bookmark(
state, catalog_entry.tap_stream_id, 'initial_full_table_complete')
state_version = singer.get_bookmark(state, catalog_entry.tap_stream_id,
'version')
activate_version_message = singer.ActivateVersionMessage(
stream=catalog_entry.stream, version=stream_version)
# For the initial replication, emit an ACTIVATE_VERSION message
# at the beginning so the records show up right away.
if not initial_full_table_complete and not (version_exists
and state_version is None):
singer.write_message(activate_version_message)
perform_resumable_sync = sync_is_resumable(mssql_conn, catalog_entry)
pk_clause = ""
with connect_with_backoff(mssql_conn) as open_conn:
with open_conn.cursor() as cur:
select_sql = common.generate_select_sql(catalog_entry, columns)
if perform_resumable_sync:
LOGGER.info(
"Full table sync is resumable based on primary key definition, will replicate incrementally"
)
state = update_incremental_full_table_state(
catalog_entry, state, cur)
pk_clause = generate_pk_clause(catalog_entry, state)
select_sql += pk_clause
params = {}
common.sync_query(cur, catalog_entry, state, select_sql, columns,
stream_version, params)
# clear max pk value and last pk fetched upon successful sync
singer.clear_bookmark(state, catalog_entry.tap_stream_id, 'max_pk_values')
singer.clear_bookmark(state, catalog_entry.tap_stream_id,
'last_pk_fetched')
singer.write_message(activate_version_message)
def sync_table(mssql_conn, config, catalog_entry, state, columns,
stream_version):
mssql_conn = MSSQLConnection(config)
common.whitelist_bookmark_keys(generate_bookmark_keys(catalog_entry),
catalog_entry.tap_stream_id, state)
bookmark = state.get("bookmarks", {}).get(catalog_entry.tap_stream_id, {})
version_exists = True if "version" in bookmark else False
initial_full_table_complete = singer.get_bookmark(
state, catalog_entry.tap_stream_id, "initial_full_table_complete")
state_version = singer.get_bookmark(state, catalog_entry.tap_stream_id,
"version")
activate_version_message = singer.ActivateVersionMessage(
stream=catalog_entry.stream, version=stream_version)
# For the initial replication, emit an ACTIVATE_VERSION message
# at the beginning so the records show up right away.
if not initial_full_table_complete and not (version_exists
and state_version is None):
singer.write_message(activate_version_message)
with connect_with_backoff(mssql_conn) as open_conn:
with open_conn.cursor() as cur:
select_sql = common.generate_select_sql(catalog_entry, columns)
params = {}
common.sync_query(cur, catalog_entry, state, select_sql, columns,
stream_version, params)
# clear max pk value and last pk fetched upon successful sync
singer.clear_bookmark(state, catalog_entry.tap_stream_id, "max_pk_values")
singer.clear_bookmark(state, catalog_entry.tap_stream_id,
"last_pk_fetched")
singer.write_message(activate_version_message)
def sync_is_resumable(mysql_conn, catalog_entry):
''' In order to resume a full table sync, a table requires
'''
database_name = common.get_database_name(catalog_entry)
key_properties = common.get_key_properties(catalog_entry)
if not key_properties:
return False
sql = """SELECT data_type
FROM information_schema.columns
WHERE table_schema = '{}'
AND table_name = '{}'
AND column_name = '{}'
"""
with connect_with_backoff(mysql_conn) as open_conn:
with open_conn.cursor() as cur:
for pk in key_properties:
cur.execute(sql.format(database_name, catalog_entry.table, pk))
result = cur.fetchone()
if not result:
raise Exception(
"Primary key column {} does not exist.".format(pk))
if result[0] not in RESUMABLE_PK_TYPES:
LOGGER.warn(
"Found primary key column %s with type %s. Will not be able "
+
"to resume interrupted FULL_TABLE sync using this key.",
pk, result[0])
return False
return True
def discover_catalog(mssql_conn, config):
"""Returns a Catalog describing the structure of the database."""
LOGGER.info("Preparing Catalog")
mssql_conn = MSSQLConnection(config)
filter_dbs_config = config.get("filter_dbs")
if filter_dbs_config:
filter_dbs_clause = ",".join(
["'{}'".format(db) for db in filter_dbs_config.split(",")])
table_schema_clause = "WHERE c.table_schema IN ({})".format(
filter_dbs_clause)
else:
table_schema_clause = """
WHERE c.TABLE_SCHEMA NOT IN (
'information_schema',
'performance_schema',
'sys'
)"""
with connect_with_backoff(mssql_conn) as open_conn:
cur = open_conn.cursor()
LOGGER.info("Fetching tables")
cur.execute("""SELECT TABLE_SCHEMA,
TABLE_NAME,
TABLE_TYPE
FROM INFORMATION_SCHEMA.TABLES c
{}
""".format(table_schema_clause))
table_info = {}
for (db, table, table_type) in cur.fetchall():
if db not in table_info:
table_info[db] = {}
table_info[db][table] = {
"row_count": None,
"is_view": table_type == "VIEW"
}
LOGGER.info("Tables fetched, fetching columns")
cur.execute("""with constraint_columns as (
select c.TABLE_SCHEMA
, c.TABLE_NAME
, c.COLUMN_NAME
from INFORMATION_SCHEMA.CONSTRAINT_COLUMN_USAGE c
join INFORMATION_SCHEMA.TABLE_CONSTRAINTS tc
on tc.TABLE_SCHEMA = c.TABLE_SCHEMA
and tc.TABLE_NAME = c.TABLE_NAME
and tc.CONSTRAINT_NAME = c.CONSTRAINT_NAME
and tc.CONSTRAINT_TYPE in ('PRIMARY KEY', 'UNIQUE'))
SELECT c.TABLE_SCHEMA,
c.TABLE_NAME,
c.COLUMN_NAME,
DATA_TYPE,
CHARACTER_MAXIMUM_LENGTH,
NUMERIC_PRECISION,
NUMERIC_SCALE,
case when cc.COLUMN_NAME is null then 0 else 1 end
FROM INFORMATION_SCHEMA.COLUMNS c
left join constraint_columns cc
on cc.TABLE_NAME = c.TABLE_NAME
and cc.TABLE_SCHEMA = c.TABLE_SCHEMA
and cc.COLUMN_NAME = c.COLUMN_NAME
{}
ORDER BY c.TABLE_SCHEMA, c.TABLE_NAME
""".format(table_schema_clause))
columns = []
rec = cur.fetchone()
while rec is not None:
columns.append(Column(*rec))
rec = cur.fetchone()
LOGGER.info("Columns Fetched")
entries = []
for (k, cols) in itertools.groupby(
columns, lambda c: (c.table_schema, c.table_name)):
cols = list(cols)
(table_schema, table_name) = k
schema = Schema(
type="object",
properties={c.column_name: schema_for_column(c)
for c in cols})
md = create_column_metadata(cols)
md_map = metadata.to_map(md)
md_map = metadata.write(md_map, (), "database-name", table_schema)
is_view = table_info[table_schema][table_name]["is_view"]
if table_schema in table_info and table_name in table_info[
table_schema]:
row_count = table_info[table_schema][table_name].get(
"row_count")
if row_count is not None:
md_map = metadata.write(md_map, (), "row-count", row_count)
md_map = metadata.write(md_map, (), "is-view", is_view)
key_properties = [
c.column_name for c in cols if c.is_primary_key == 1
]
md_map = metadata.write(md_map, (), "table-key-properties",
key_properties)
entry = CatalogEntry(
table=table_name,
stream=table_name,
metadata=metadata.to_list(md_map),
tap_stream_id=common.generate_tap_stream_id(
table_schema, table_name),
schema=schema,
)
entries.append(entry)
LOGGER.info("Catalog ready")
return Catalog(entries)
def discover_catalog(mssql_conn, config):
"""Returns a Catalog describing the structure of the database."""
LOGGER.info("Preparing Catalog")
mssql_conn = MSSQLConnection(config)
filter_dbs_config = config.get("filter_dbs")
if filter_dbs_config:
filter_dbs_clause = ",".join(["'{}'".format(db) for db in filter_dbs_config.split(",")])
table_schema_clause = "WHERE c.table_schema IN ({})".format(filter_dbs_clause)
else:
table_schema_clause = """
WHERE c.table_schema NOT IN (
'information_schema',
'performance_schema',
'sys'
)"""
with connect_with_backoff(mssql_conn) as open_conn:
cur = open_conn.cursor()
LOGGER.info("Fetching tables")
cur.execute(
"""SELECT table_schema,
table_name,
table_type
FROM information_schema.tables c
{}
""".format(
table_schema_clause
)
)
table_info = {}
for (db, table, table_type) in cur.fetchall():
if db not in table_info:
table_info[db] = {}
table_info[db][table] = {"row_count": None, "is_view": table_type == "VIEW"}
LOGGER.info("Tables fetched, fetching columns")
cur.execute(
"""with constraint_columns as (
select c.table_schema
, c.table_name
, c.column_name
from information_schema.constraint_column_usage c
join information_schema.table_constraints tc
on tc.table_schema = c.table_schema
and tc.table_name = c.table_name
and tc.constraint_name = c.constraint_name
and tc.constraint_type in ('PRIMARY KEY', 'UNIQUE'))
SELECT c.table_schema,
c.table_name,
c.column_name,
data_type,
character_maximum_length,
numeric_precision,
numeric_scale,
case when cc.column_name is null then 0 else 1 end
FROM information_schema.columns c
left join constraint_columns cc
on cc.table_name = c.table_name
and cc.table_schema = c.table_schema
and cc.column_name = c.column_name
{}
ORDER BY c.table_schema, c.table_name
""".format(
table_schema_clause
)
)
columns = []
rec = cur.fetchone()
while rec is not None:
columns.append(Column(*rec))
rec = cur.fetchone()
LOGGER.info("Columns Fetched")
entries = []
for (k, cols) in itertools.groupby(columns, lambda c: (c.table_schema, c.table_name)):
cols = list(cols)
(table_schema, table_name) = k
schema = Schema(
type="object", properties={c.column_name: schema_for_column(c) for c in cols}
)
md = create_column_metadata(cols)
md_map = metadata.to_map(md)
md_map = metadata.write(md_map, (), "database-name", table_schema)
is_view = table_info[table_schema][table_name]["is_view"]
if table_schema in table_info and table_name in table_info[table_schema]:
row_count = table_info[table_schema][table_name].get("row_count")
if row_count is not None:
md_map = metadata.write(md_map, (), "row-count", row_count)
md_map = metadata.write(md_map, (), "is-view", is_view)
key_properties = [c.column_name for c in cols if c.is_primary_key == 1]
md_map = metadata.write(md_map, (), "table-key-properties", key_properties)
entry = CatalogEntry(
table=table_name,
stream=table_name,
metadata=metadata.to_list(md_map),
tap_stream_id=common.generate_tap_stream_id(table_schema, table_name),
schema=schema,
)
entries.append(entry)
LOGGER.info("Catalog ready")
return Catalog(entries)
def discover(conn, config):
with connect_with_backoff(conn) as open_conn:
with open_conn.cursor() as cur:
cur.execute("""
SELECT TABLE_CATALOG, TABLE_SCHEMA, TABLE_NAME, TABLE_TYPE From INFORMATION_SCHEMA.TABLES
""")
table_info = {}
schemas = cur.fetchall()
for (db, schema, table, table_type) in schemas:
if db not in table_info:
table_info[db] = {}
if schema not in table_info[db]:
table_info[db][schema] = {}
table_info[db][schema][table] = {
# 'row_count': rows,
'is_view': table_type == 'VIEW'
}
cur.execute("""
SELECT
C.TABLE_SCHEMA, C.TABLE_NAME, C.COLUMN_NAME, C.DATA_TYPE, C.CHARACTER_MAXIMUM_LENGTH, C.NUMERIC_PRECISION,
C.NUMERIC_PRECISION, TC.CONSTRAINT_TYPE
FROM INFORMATION_SCHEMA.COLUMNS C
LEFT JOIN INFORMATION_SCHEMA.CONSTRAINT_COLUMN_USAGE CCU On C.COLUMN_NAME = CCU.COLUMN_NAME
LEFT JOIN INFORMATION_SCHEMA.TABLE_CONSTRAINTS TC ON CCU.CONSTRAINT_NAME = Tc.CONSTRAINT_NAME
ORDER BY C.TABLE_SCHEMA, C.TABLE_NAME
""")
# res = cur.fetchall()
columns = []
rec = cur.fetchone()
while rec is not None:
columns.append(Column(*rec))
rec = cur.fetchone()
entries = []
for (k, cols) in itertools.groupby(
columns, lambda c: (c.table_schema, c.table_name)):
cols = list(cols)
(table_schema, table_name) = k
schema = Schema(type='object',
properties={
c.column_name: schema_for_column(c)
for c in cols
})
md = create_column_metadata(cols)
md_map = metadata.to_map(md)
md_map = metadata.write(md_map, (), 'database-name',
table_schema)
is_view = table_info[db][table_schema][table_name]['is_view']
if table_schema in table_info and table_name in table_info[
table_schema]:
row_count = table_info[table_schema][table_name].get(
'row_count')
if row_count is not None:
md_map = metadata.write(md_map, (), 'row-count',
row_count)
md_map = metadata.write(md_map, (), 'is-view', is_view)
column_is_key_prop = lambda c, s: (
c.constraint_type == 'PRI' and s.properties[
c.column_name].inclusion != 'unsupported')
key_properties = [
c.column_name for c in cols
if column_is_key_prop(c, schema)
]
if not is_view:
md_map = metadata.write(md_map, (), 'table-key-properties',
key_properties)
entry = CatalogEntry(
table=table_name,
stream=table_name,
metadata=metadata.to_list(md_map),
tap_stream_id=common.generate_tap_stream_id(
table_schema, table_name),
schema=schema)
entries.append(entry)
return Catalog(entries)
raw_schemas = load_schemas()
streams = []
for schema_name, schema in raw_schemas.items():
# TODO: populate any metadata and stream's key properties here..
stream_metadata = []
stream_key_properties = []
# create and add catalog entry
catalog_entry = {
'stream': schema_name,
'tap_stream_id': schema_name,
'schema': schema,
'metadata': [],
'key_properties': []
}
streams.append(catalog_entry)
return {'streams': streams}
def runTest(self):
connection = test_utils.get_test_connection()
with connect_with_backoff(connection) as conn:
result = conn.execute_scalar('SELECT 1 + 1')
self.assertEqual(result, 2)
