def load_data(dsn, threads):
""" Copy data into the word and placex table.
"""
sel = selectors.DefaultSelector()
# Then copy data from place to placex in <threads - 1> chunks.
place_threads = max(1, threads - 1)
for imod in range(place_threads):
conn = DBConnection(dsn)
conn.connect()
conn.perform(
pysql.SQL("""INSERT INTO placex ({columns})
SELECT {columns} FROM place
WHERE osm_id % {total} = {mod}
AND NOT (class='place' and (type='houses' or type='postcode'))
AND ST_IsValid(geometry)
""").format(columns=_COPY_COLUMNS,
total=pysql.Literal(place_threads),
mod=pysql.Literal(imod)))
sel.register(conn, selectors.EVENT_READ, conn)
# Address interpolations go into another table.
conn = DBConnection(dsn)
conn.connect()
conn.perform(
"""INSERT INTO location_property_osmline (osm_id, address, linegeo)
SELECT osm_id, address, geometry FROM place
WHERE class='place' and type='houses' and osm_type='W'
and ST_GeometryType(geometry) = 'ST_LineString'
""")
sel.register(conn, selectors.EVENT_READ, conn)
# Now wait for all of them to finish.
todo = place_threads + 1
while todo > 0:
for key, _ in sel.select(1):
conn = key.data
sel.unregister(conn)
conn.wait()
conn.close()
todo -= 1
print('.', end='', flush=True)
print('\n')
with connect(dsn) as conn:
with conn.cursor() as cur:
cur.execute('ANALYSE')
def load_data(dsn, data_dir, threads):
""" Copy data into the word and placex table.
"""
# Pre-calculate the most important terms in the word list.
db_utils.execute_file(dsn, data_dir / 'words.sql')
sel = selectors.DefaultSelector()
# Then copy data from place to placex in <threads - 1> chunks.
place_threads = max(1, threads - 1)
for imod in range(place_threads):
conn = DBConnection(dsn)
conn.connect()
conn.perform("""INSERT INTO placex ({0})
SELECT {0} FROM place
WHERE osm_id % {1} = {2}
AND NOT (class='place' and type='houses')
AND ST_IsValid(geometry)
""".format(_COPY_COLUMNS, place_threads, imod))
sel.register(conn, selectors.EVENT_READ, conn)
# Address interpolations go into another table.
conn = DBConnection(dsn)
conn.connect()
conn.perform("""INSERT INTO location_property_osmline (osm_id, address, linegeo)
SELECT osm_id, address, geometry FROM place
WHERE class='place' and type='houses' and osm_type='W'
and ST_GeometryType(geometry) = 'ST_LineString'
""")
sel.register(conn, selectors.EVENT_READ, conn)
# Now wait for all of them to finish.
todo = place_threads + 1
while todo > 0:
for key, _ in sel.select(1):
conn = key.data
sel.unregister(conn)
conn.wait()
conn.close()
todo -= 1
print('.', end='', flush=True)
print('\n')
with connect(dsn) as conn:
with conn.cursor() as cur:
cur.execute('ANALYSE')
def add_tiger_data(data_dir, config, threads):
""" Import tiger data from directory or tar file `data dir`.
"""
dsn = config.get_libpq_dsn()
sql_files, tar = handle_tarfile_or_directory(data_dir)
if not sql_files:
return
with connect(dsn) as conn:
sql = SQLPreprocessor(conn, config)
sql.run_sql_file(conn, 'tiger_import_start.sql')
# Reading sql_files and then for each file line handling
# sql_query in <threads - 1> chunks.
sel = selectors.DefaultSelector()
place_threads = max(1, threads - 1)
# Creates a pool of database connections
for _ in range(place_threads):
conn = DBConnection(dsn)
conn.connect()
sel.register(conn, selectors.EVENT_WRITE, conn)
for sql_file in sql_files:
if not tar:
file = open(sql_file)
else:
file = tar.extractfile(sql_file)
handle_threaded_sql_statements(sel, file)
# Unregistering pool of database connections
handle_unregister_connection_pool(sel, place_threads)
if tar:
tar.close()
print('\n')
LOG.warning("Creating indexes on Tiger data")
with connect(dsn) as conn:
sql = SQLPreprocessor(conn, config)
sql.run_sql_file(conn, 'tiger_import_finish.sql')
