#
-# PostgreSQL database interface. Sort of like DBI(3) (Database
-# independent interface for Perl).
+# PostgreSQL database interface.
+# Sort of like DBI(3) (Database independent interface for Perl).
#
# Mark Huang <mlhuang@cs.princeton.edu>
# Copyright (C) 2006 The Trustees of Princeton University
#
-# $Id$
-# $URL$
-#
import psycopg2
import psycopg2.extensions
# UNICODEARRAY not exported yet
psycopg2.extensions.register_type(psycopg2._psycopg.UNICODEARRAY)
-import pgdb
import types
from types import StringTypes, NoneType
import traceback
from PLC.Faults import *
from datetime import datetime as DateTimeType
-# From pgdb
-def _quote(x):
- if isinstance(x, DateTimeType):
- x = str(x)
- elif isinstance(x, unicode):
- x = x.encode( 'utf-8' )
-
- if isinstance(x, types.StringType):
- x = "'%s'" % str(x).replace("\\", "\\\\").replace("'", "''")
- elif isinstance(x, (types.IntType, types.LongType, types.FloatType)):
- pass
- elif x is None:
- x = 'NULL'
- elif isinstance(x, (types.ListType, types.TupleType, set)):
- x = 'ARRAY[%s]' % ', '.join(map(lambda x: str(_quote(x)), x))
- elif hasattr(x, '__pg_repr__'):
- x = x.__pg_repr__()
- else:
- raise pgdb.InterfaceError, 'do not know how to handle type %s' % type(x)
- return x
-
class PostgreSQL:
def __init__(self, api):
self.api = api
self.connection.close()
self.connection = None
- @classmethod
+ @staticmethod
+ # From pgdb, and simplify code
+ def _quote(x):
+ if isinstance(x, DateTimeType):
+ x = str(x)
+ elif isinstance(x, unicode):
+ x = x.encode( 'utf-8' )
+
+ if isinstance(x, types.StringType):
+ x = "'%s'" % str(x).replace("\\", "\\\\").replace("'", "''")
+ elif isinstance(x, (types.IntType, types.LongType, types.FloatType)):
+ pass
+ elif x is None:
+ x = 'NULL'
+ elif isinstance(x, (types.ListType, types.TupleType, set)):
+ x = 'ARRAY[%s]' % ', '.join(map(lambda x: str(_quote(x)), x))
+ elif hasattr(x, '__pg_repr__'):
+ x = x.__pg_repr__()
+ else:
+ raise PLCDBError, 'Cannot quote type %s' % type(x)
+ return x
+
+
def quote(self, value):
"""
Returns quoted version of the specified value.
"""
- return _quote(value)
+ return PostgreSQL._quote (value)
+
+# following is an unsuccessful attempt to re-use lib code as much as possible
+# def quote(self, value):
+# # The pgdb._quote function is good enough for general SQL
+# # quoting, except for array types.
+# if isinstance (value, (types.ListType, types.TupleType, set)):
+# 'ARRAY[%s]' % ', '.join( [ str(self.quote(x)) for x in value ] )
+# else:
+# try:
+# # up to PyGreSQL-3.x, function was pgdb._quote
+# import pgdb
+# return pgdb._quote(value)
+# except:
+# # with PyGreSQL-4.x, use psycopg2's adapt
+# from psycopg2.extensions import adapt
+# return adapt (value)
@classmethod
def param(self, name, value):