#
-# 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
-from types import StringTypes, NoneType
+import types
import traceback
-import commands
+import subprocess
import re
from pprint import pformat
-from PLC.Debug import profile, log
+from PLC.Logger import logger
+from PLC.Debug import profile
from PLC.Faults import *
+from datetime import datetime as DateTimeType
class PostgreSQL:
def __init__(self, api):
self.connection.close()
self.connection = None
- # join insists on getting strings
- @classmethod
- def quote_string(self, value):
- return str(PostgreSQL.quote(value))
+ @staticmethod
+ # From pgdb, and simplify code
+ def _quote(x):
+ if isinstance(x, DateTimeType):
+ x = str(x)
+ elif isinstance(x, str):
+ x = x.encode( 'utf-8' )
+
+ if isinstance(x, bytes):
+ x = "'%s'" % str(x).replace("\\", "\\\\").replace("'", "''")
+ elif isinstance(x, (int, float)):
+ pass
+ elif x is None:
+ x = 'NULL'
+ elif isinstance(x, (list, tuple, set)):
+ x = 'ARRAY[%s]' % ', '.join([str(_quote(x)) for x in x])
+ elif hasattr(x, '__pg_repr__'):
+ x = x.__pg_repr__()
+ else:
+ raise PLCDBError('Cannot quote type %s' % type(x))
+ return x
+
- @classmethod
def quote(self, value):
"""
Returns quoted version of the specified value.
"""
-
- # The pgdb._quote function is good enough for general SQL
- # quoting, except for array types.
- if isinstance(value, (list, tuple, set)):
- return "ARRAY[%s]" % ", ".join(map (PostgreSQL.quote_string, value))
- else:
- return pgdb._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):
# None is converted to the unquoted string NULL
- if isinstance(value, NoneType):
+ if isinstance(value, type(None)):
conversion = "s"
# True and False are also converted to unquoted strings
elif isinstance(value, bool):
conversion = "s"
elif isinstance(value, float):
conversion = "f"
- elif not isinstance(value, StringTypes):
+ elif not isinstance(value, str):
conversion = "d"
else:
conversion = "s"
return self.rowcount
def next_id(self, table_name, primary_key):
- sequence = "%(table_name)s_%(primary_key)s_seq" % locals()
- sql = "SELECT nextval('%(sequence)s')" % locals()
- rows = self.selectall(sql, hashref = False)
- if rows:
- return rows[0][0]
-
- return None
+ sequence = "%(table_name)s_%(primary_key)s_seq" % locals()
+ sql = "SELECT nextval('%(sequence)s')" % locals()
+ rows = self.selectall(sql, hashref = False)
+ if rows:
+ return rows[0][0]
+
+ return None
def last_insert_id(self, table_name, primary_key):
if isinstance(self.lastrowid, int):
return None
- # modified for psycopg2-2.0.7
+ # modified for psycopg2-2.0.7
# executemany is undefined for SELECT's
# see http://www.python.org/dev/peps/pep-0249/
# accepts either None, a single dict, a tuple of single dict - in which case it execute's
if not params:
if self.debug:
- print >> log,'execute0',query
+ logger.debug('execute0: {}'.format(query))
cursor.execute(query)
- elif isinstance(params,dict):
+ elif isinstance(params, dict):
if self.debug:
- print >> log,'execute-dict: params',params,'query',query%params
- cursor.execute(query,params)
+ logger.debug('execute-dict: params {} query {}'
+ .format(params, query%params))
+ cursor.execute(query, params)
elif isinstance(params,tuple) and len(params)==1:
if self.debug:
- print >> log,'execute-tuple',query%params[0]
+ logger.debug('execute-tuple {}'.format(query%params[0]))
cursor.execute(query,params[0])
else:
param_seq=(params,)
if self.debug:
for params in param_seq:
- print >> log,'executemany',query%params
+ logger.debug('executemany {}'.format(query%params))
cursor.executemany(query, param_seq)
(self.rowcount, self.description, self.lastrowid) = \
(cursor.rowcount, cursor.description, cursor.lastrowid)
- except Exception, e:
+ except Exception as e:
try:
self.rollback()
except:
pass
- uuid = commands.getoutput("uuidgen")
- print >> log, "Database error %s:" % uuid
- print >> log, e
- print >> log, "Query:"
- print >> log, query
- print >> log, "Params:"
- print >> log, pformat(params)
+ uuid = subprocess.getoutput("uuidgen")
+ message = "Database error {}: - Query {} - Params {}".format(uuid, query, pformat(params))
+ logger.exception(message)
raise PLCDBError("Please contact " + \
self.api.config.PLC_NAME + " Support " + \
"<" + self.api.config.PLC_MAIL_SUPPORT_ADDRESS + ">" + \
# Return each row as a dictionary keyed on field name
# (like DBI selectrow_hashref()).
labels = [column[0] for column in self.description]
- rows = [dict(zip(labels, row)) for row in rows]
+ rows = [dict(list(zip(labels, row))) for row in rows]
if key_field is not None and key_field in labels:
# Return rows as a dictionary keyed on the specified field
"""
if hasattr(self, 'fields_cache'):
- if self.fields_cache.has_key((table, notnull, hasdef)):
+ if (table, notnull, hasdef) in self.fields_cache:
return self.fields_cache[(table, notnull, hasdef)]
else:
self.fields_cache = {}
git://git.onelab.eu / plcapi.git / blobdiff