+# SPDX-License-Identifier: GPL-2.0-only
+#
+# This file is part of Nominatim. (https://nominatim.org)
+#
+# Copyright (C) 2022 by the Nominatim developer community.
+# For a full list of authors see the git log.
"""
Preprocessing of SQL files.
"""
+from typing import Set, Dict, Any, cast
import jinja2
+from nominatim.db.connection import Connection
+from nominatim.db.async_connection import WorkerPool
+from nominatim.config import Configuration
-def _get_partitions(conn):
+def _get_partitions(conn: Connection) -> Set[int]:
""" Get the set of partitions currently in use.
"""
with conn.cursor() as cur:
return partitions
-def _get_tables(conn):
+def _get_tables(conn: Connection) -> Set[str]:
""" Return the set of tables currently in use.
- Only includes non-partitioned
"""
with conn.cursor() as cur:
cur.execute("SELECT tablename FROM pg_tables WHERE schemaname = 'public'")
return set((row[0] for row in list(cur)))
+def _get_middle_db_format(conn: Connection, tables: Set[str]) -> str:
+ """ Returns the version of the slim middle tables.
+ """
+ if 'osm2pgsql_properties' not in tables:
+ return '1'
+
+ with conn.cursor() as cur:
+ cur.execute("SELECT value FROM osm2pgsql_properties WHERE property = 'db_format'")
+ row = cur.fetchone()
+
+ return cast(str, row[0]) if row is not None else '1'
-def _setup_tablespace_sql(config):
+
+def _setup_tablespace_sql(config: Configuration) -> Dict[str, str]:
""" Returns a dict with tablespace expressions for the different tablespace
kinds depending on whether a tablespace is configured or not.
"""
out = {}
for subset in ('ADDRESS', 'SEARCH', 'AUX'):
for kind in ('DATA', 'INDEX'):
- tspace = getattr(config, 'TABLESPACE_{}_{}'.format(subset, kind))
+ tspace = getattr(config, f'TABLESPACE_{subset}_{kind}')
if tspace:
- tspace = 'TABLESPACE "{}"'.format(tspace)
- out['{}_{}'.format(subset.lower, kind.lower())] = tspace
+ tspace = f'TABLESPACE "{tspace}"'
+ out[f'{subset.lower()}_{kind.lower()}'] = tspace
return out
-def _setup_postgres_sql(conn):
- """ Set up a dictionary with various Postgresql/Postgis SQL terms which
- are dependent on the database version in use.
- """
- out = {}
- pg_version = conn.server_version_tuple()
- # CREATE INDEX IF NOT EXISTS was introduced in PG9.5.
- # Note that you need to ignore failures on older versions when
- # using this construct.
- out['if_index_not_exists'] = ' IF NOT EXISTS ' if pg_version >= (9, 5, 0) else ''
-
- return out
-
-
-def _setup_postgresql_features(conn):
+def _setup_postgresql_features(conn: Connection) -> Dict[str, Any]:
""" Set up a dictionary with various optional Postgresql/Postgis features that
depend on the database version.
"""
pg_version = conn.server_version_tuple()
+ postgis_version = conn.postgis_version_tuple()
+ pg11plus = pg_version >= (11, 0, 0)
+ ps3 = postgis_version >= (3, 0)
return {
- 'has_index_non_key_column' : pg_version >= (11, 0, 0)
+ 'has_index_non_key_column': pg11plus,
+ 'spgist_geom' : 'SPGIST' if pg11plus and ps3 else 'GIST'
}
-class SQLPreprocessor: # pylint: disable=too-few-public-methods
+class SQLPreprocessor:
""" A environment for preprocessing SQL files from the
lib-sql directory.
and follows its syntax.
"""
- def __init__(self, conn, config):
+ def __init__(self, conn: Connection, config: Configuration) -> None:
self.env = jinja2.Environment(autoescape=False,
loader=jinja2.FileSystemLoader(str(config.lib_dir.sql)))
- db_info = {}
+ db_info: Dict[str, Any] = {}
db_info['partitions'] = _get_partitions(conn)
db_info['tables'] = _get_tables(conn)
db_info['reverse_only'] = 'search_name' not in db_info['tables']
db_info['tablespace'] = _setup_tablespace_sql(config)
+ db_info['middle_db_format'] = _get_middle_db_format(conn, db_info['tables'])
self.env.globals['config'] = config
self.env.globals['db'] = db_info
- self.env.globals['sql'] = _setup_postgres_sql(conn)
self.env.globals['postgres'] = _setup_postgresql_features(conn)
- self.env.globals['modulepath'] = config.DATABASE_MODULE_PATH or \
- str((config.project_dir / 'module').resolve())
- def run_sql_file(self, conn, name, **kwargs):
+ def run_string(self, conn: Connection, template: str, **kwargs: Any) -> None:
+ """ Execute the given SQL template string on the connection.
+ The keyword arguments may supply additional parameters
+ for preprocessing.
+ """
+ sql = self.env.from_string(template).render(**kwargs)
+
+ with conn.cursor() as cur:
+ cur.execute(sql)
+ conn.commit()
+
+
+ def run_sql_file(self, conn: Connection, name: str, **kwargs: Any) -> None:
""" Execute the given SQL file on the connection. The keyword arguments
may supply additional parameters for preprocessing.
"""
with conn.cursor() as cur:
cur.execute(sql)
conn.commit()
+
+
+ def run_parallel_sql_file(self, dsn: str, name: str, num_threads: int = 1,
+ **kwargs: Any) -> None:
+ """ Execute the given SQL files using parallel asynchronous connections.
+ The keyword arguments may supply additional parameters for
+ preprocessing.
+
+ After preprocessing the SQL code is cut at lines containing only
+ '---'. Each chunk is sent to one of the `num_threads` workers.
+ """
+ sql = self.env.get_template(name).render(**kwargs)
+
+ parts = sql.split('\n---\n')
+
+ with WorkerPool(dsn, num_threads) as pool:
+ for part in parts:
+ pool.next_free_worker().perform(part)
projects / nominatim.git / blobdiff