/usr/lib/python3/dist-packages/trytond/backend/postgresql/database.py is in tryton-server 4.6.3-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# this repository contains the full copyright notices and license terms.
import time
import logging
import os
import urllib.request, urllib.parse, urllib.error
import json
from decimal import Decimal
from threading import RLock
try:
from psycopg2cffi import compat
compat.register()
except ImportError:
pass
from psycopg2 import connect, Binary
from psycopg2.pool import ThreadedConnectionPool, PoolError
from psycopg2.extensions import cursor
from psycopg2.extensions import ISOLATION_LEVEL_REPEATABLE_READ
from psycopg2.extensions import ISOLATION_LEVEL_AUTOCOMMIT
from psycopg2.extensions import register_type, register_adapter
from psycopg2.extensions import UNICODE, AsIs
try:
from psycopg2.extensions import PYDATE, PYDATETIME, PYTIME, PYINTERVAL
except ImportError:
PYDATE, PYDATETIME, PYTIME, PYINTERVAL = None, None, None, None
from psycopg2 import IntegrityError as DatabaseIntegrityError
from psycopg2 import OperationalError as DatabaseOperationalError
from psycopg2.extras import register_default_json, register_default_jsonb
from sql import Flavor
from trytond.backend.database import DatabaseInterface, SQLType
from trytond.config import config, parse_uri
from trytond.protocols.jsonrpc import JSONDecoder
__all__ = ['Database', 'DatabaseIntegrityError', 'DatabaseOperationalError']
logger = logging.getLogger(__name__)
os.environ['PGTZ'] = os.environ.get('TZ', '')
def unescape_quote(s):
if s.startswith('"') and s.endswith('"'):
return s.strip('"').replace('""', '"')
return s
def replace_special_values(s, **mapping):
for name, value in mapping.items():
s = s.replace('$' + name, value)
return s
class LoggingCursor(cursor):
def execute(self, sql, args=None):
if logger.isEnabledFor(logging.DEBUG):
logger.debug(self.mogrify(sql, args))
cursor.execute(self, sql, args)
class Database(DatabaseInterface):
_lock = RLock()
_databases = {}
_connpool = None
_list_cache = None
_list_cache_timestamp = None
_version_cache = {}
_search_path = None
_current_user = None
_has_returning = None
flavor = Flavor(ilike=True)
TYPES_MAPPING = {
'INTEGER': SQLType('INT4', 'INT4'),
'BIGINT': SQLType('INT8', 'INT8'),
'FLOAT': SQLType('FLOAT8', 'FLOAT8'),
'BLOB': SQLType('BYTEA', 'BYTEA'),
'DATETIME': SQLType('TIMESTAMP', 'TIMESTAMP(0)'),
'TIMESTAMP': SQLType('TIMESTAMP', 'TIMESTAMP(6)'),
}
def __new__(cls, name='template1'):
with cls._lock:
if name in cls._databases:
return cls._databases[name]
inst = DatabaseInterface.__new__(cls, name=name)
logger.info('connect to "%s"', name)
minconn = config.getint('database', 'minconn', default=1)
maxconn = config.getint('database', 'maxconn', default=64)
inst._connpool = ThreadedConnectionPool(
minconn, maxconn, cls.dsn(name),
cursor_factory=LoggingCursor)
cls._databases[name] = inst
return inst
@classmethod
def dsn(cls, name):
uri = parse_uri(config.get('database', 'uri'))
host = uri.hostname and "host=%s" % uri.hostname or ''
port = uri.port and "port=%s" % uri.port or ''
name = "dbname=%s" % name
user = uri.username and "user=%s" % uri.username or ''
password = ("password=%s" % urllib.parse.unquote_plus(uri.password)
if uri.password else '')
return '%s %s %s %s %s' % (host, port, name, user, password)
def connect(self):
return self
def get_connection(self, autocommit=False, readonly=False):
for count in range(config.getint('database', 'retry'), -1, -1):
try:
conn = self._connpool.getconn()
break
except PoolError:
if count and not self._connpool.closed:
logger.info('waiting a connection')
time.sleep(1)
continue
raise
if autocommit:
conn.set_isolation_level(ISOLATION_LEVEL_AUTOCOMMIT)
else:
conn.set_isolation_level(ISOLATION_LEVEL_REPEATABLE_READ)
if readonly:
cursor = conn.cursor()
cursor.execute('SET TRANSACTION READ ONLY')
return conn
def put_connection(self, connection, close=False):
self._connpool.putconn(connection, close=close)
def close(self):
with self._lock:
self._connpool.closeall()
self._databases.pop(self.name)
@classmethod
def create(cls, connection, database_name, template='template0'):
cursor = connection.cursor()
cursor.execute('CREATE DATABASE "' + database_name + '" '
'TEMPLATE "' + template + '" ENCODING \'unicode\'')
connection.commit()
cls._list_cache = None
def drop(self, connection, database_name):
cursor = connection.cursor()
cursor.execute('DROP DATABASE "' + database_name + '"')
self.__class__._list_cache = None
def get_version(self, connection):
if self.name not in self._version_cache:
cursor = connection.cursor()
cursor.execute('SHOW server_version_num')
version, = cursor.fetchone()
major, rest = divmod(int(version), 10000)
minor, patch = divmod(rest, 100)
self._version_cache[self.name] = (major, minor, patch)
return self._version_cache[self.name]
def list(self):
now = time.time()
timeout = config.getint('session', 'timeout')
res = self.__class__._list_cache
if res and abs(self.__class__._list_cache_timestamp - now) < timeout:
return res
connection = self.get_connection()
try:
cursor = connection.cursor()
cursor.execute('SELECT datname FROM pg_database '
'WHERE datistemplate = false ORDER BY datname')
res = []
for db_name, in cursor:
try:
with connect(self.dsn(db_name)) as conn:
if self._test(conn):
res.append(db_name)
except Exception:
continue
finally:
self.put_connection(connection)
self.__class__._list_cache = res
self.__class__._list_cache_timestamp = now
return res
def init(self):
from trytond.modules import get_module_info
connection = self.get_connection()
try:
cursor = connection.cursor()
sql_file = os.path.join(os.path.dirname(__file__), 'init.sql')
with open(sql_file) as fp:
for line in fp.read().split(';'):
if (len(line) > 0) and (not line.isspace()):
cursor.execute(line)
for module in ('ir', 'res'):
state = 'not activated'
if module in ('ir', 'res'):
state = 'to activate'
info = get_module_info(module)
cursor.execute('SELECT NEXTVAL(\'ir_module_id_seq\')')
module_id = cursor.fetchone()[0]
cursor.execute('INSERT INTO ir_module '
'(id, create_uid, create_date, name, state) '
'VALUES (%s, %s, now(), %s, %s)',
(module_id, 0, module, state))
for dependency in info.get('depends', []):
cursor.execute('INSERT INTO ir_module_dependency '
'(create_uid, create_date, module, name) '
'VALUES (%s, now(), %s, %s)',
(0, module_id, dependency))
connection.commit()
finally:
self.put_connection(connection)
def test(self):
connection = self.get_connection()
is_tryton_database = self._test(connection)
self.put_connection(connection)
return is_tryton_database
@classmethod
def _test(cls, connection):
cursor = connection.cursor()
cursor.execute('SELECT 1 FROM information_schema.tables '
'WHERE table_name IN %s',
(('ir_model', 'ir_model_field', 'ir_ui_view', 'ir_ui_menu',
'res_user', 'res_group', 'ir_module',
'ir_module_dependency', 'ir_translation',
'ir_lang'),))
return len(cursor.fetchall()) != 0
def nextid(self, connection, table):
cursor = connection.cursor()
cursor.execute("SELECT NEXTVAL('" + table + "_id_seq')")
return cursor.fetchone()[0]
def setnextid(self, connection, table, value):
cursor = connection.cursor()
cursor.execute("SELECT SETVAL('" + table + "_id_seq', %d)" % value)
def currid(self, connection, table):
cursor = connection.cursor()
cursor.execute('SELECT last_value FROM "' + table + '_id_seq"')
return cursor.fetchone()[0]
def lock(self, connection, table):
cursor = connection.cursor()
cursor.execute('LOCK "%s" IN EXCLUSIVE MODE NOWAIT' % table)
def has_constraint(self):
return True
def has_multirow_insert(self):
return True
def get_table_schema(self, connection, table_name):
cursor = connection.cursor()
for schema in self.search_path:
cursor.execute('SELECT 1 '
'FROM information_schema.tables '
'WHERE table_name = %s AND table_schema = %s',
(table_name, schema))
if cursor.rowcount:
return schema
@property
def current_user(self):
if self._current_user is None:
connection = self.get_connection()
try:
cursor = connection.cursor()
cursor.execute('SELECT current_user')
self._current_user = cursor.fetchone()[0]
finally:
self.put_connection(connection)
return self._current_user
@property
def search_path(self):
if self._search_path is None:
connection = self.get_connection()
try:
cursor = connection.cursor()
cursor.execute('SHOW search_path')
path, = cursor.fetchone()
special_values = {
'user': self.current_user,
}
self._search_path = [
unescape_quote(replace_special_values(
p.strip(), **special_values))
for p in path.split(',')]
finally:
self.put_connection(connection)
return self._search_path
def has_returning(self):
if self._has_returning is None:
connection = self.get_connection()
try:
# RETURNING clause is available since PostgreSQL 8.2
self._has_returning = self.get_version(connection) >= (8, 2)
finally:
self.put_connection(connection)
return self._has_returning
def has_select_for(self):
return True
def has_window_functions(self):
return True
@classmethod
def has_sequence(cls):
return True
def sql_type(self, type_):
if type_ in self.TYPES_MAPPING:
return self.TYPES_MAPPING[type_]
if type_.startswith('VARCHAR'):
return SQLType('VARCHAR', type_)
return SQLType(type_, type_)
def sql_format(self, type_, value):
if type_ == 'BLOB':
if value is not None:
return Binary(value)
return value
def sequence_exist(self, connection, name):
cursor = connection.cursor()
for schema in self.search_path:
cursor.execute('SELECT 1 '
'FROM information_schema.sequences '
'WHERE sequence_name = %s AND sequence_schema = %s',
(name, schema))
if cursor.rowcount:
return True
return False
def sequence_create(
self, connection, name, number_increment=1, start_value=1):
cursor = connection.cursor()
param = self.flavor.param
cursor.execute(
'CREATE SEQUENCE "%s" '
'INCREMENT BY %s '
'START WITH %s'
% (name, param, param),
(number_increment, start_value))
def sequence_update(
self, connection, name, number_increment=1, start_value=1):
cursor = connection.cursor()
param = self.flavor.param
cursor.execute(
'ALTER SEQUENCE "%s" '
'INCREMENT BY %s '
'RESTART WITH %s'
% (name, param, param),
(number_increment, start_value))
def sequence_rename(self, connection, old_name, new_name):
cursor = connection.cursor()
if (self.sequence_exist(connection, old_name)
and not self.sequence_exist(connection, new_name)):
cursor.execute('ALTER TABLE "%s" RENAME TO "%s"'
% (old_name, new_name))
def sequence_delete(self, connection, name):
cursor = connection.cursor()
cursor.execute('DROP SEQUENCE "%s"' % name)
def sequence_next_number(self, connection, name):
cursor = connection.cursor()
version = self.get_version(connection)
if version >= (10, 0):
cursor.execute(
'SELECT increment_by '
'FROM pg_sequences '
'WHERE sequencename=%s '
% self.flavor.param,
(name,))
increment, = cursor.fetchone()
cursor.execute(
'SELECT CASE WHEN NOT is_called THEN last_value '
'ELSE last_value + %s '
'END '
'FROM "%s"' % (self.flavor.param, name),
(increment,))
else:
cursor.execute(
'SELECT CASE WHEN NOT is_called THEN last_value '
'ELSE last_value + increment_by '
'END '
'FROM "%s"' % name)
return cursor.fetchone()[0]
register_type(UNICODE)
if PYDATE:
register_type(PYDATE)
if PYDATETIME:
register_type(PYDATETIME)
if PYTIME:
register_type(PYTIME)
if PYINTERVAL:
register_type(PYINTERVAL)
register_adapter(float, lambda value: AsIs(repr(value)))
register_adapter(Decimal, lambda value: AsIs(str(value)))
def convert_json(value):
return json.loads(value, object_hook=JSONDecoder())
register_default_json(loads=convert_json)
register_default_jsonb(loads=convert_json)
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