# Mark Huang <mlhuang@cs.princeton.edu>
# Copyright (C) 2006 The Trustees of Princeton University
#
-# $Id: PostgreSQL.py,v 1.14 2007/02/11 18:34:06 mlhuang Exp $
+# $Id$
+# $URL$
#
import psycopg2
from PLC.Debug import profile, log
from PLC.Faults import *
-if not psycopg2:
- is8bit = re.compile("[\x80-\xff]").search
-
- def unicast(typecast):
- """
- pgdb returns raw UTF-8 strings. This function casts strings that
- appear to contain non-ASCII characters to unicode objects.
- """
-
- def wrapper(*args, **kwds):
- value = typecast(*args, **kwds)
-
- # pgdb always encodes unicode objects as UTF-8 regardless of
- # the DB encoding (and gives you no option for overriding
- # the encoding), so always decode 8-bit objects as UTF-8.
- if isinstance(value, str) and is8bit(value):
- value = unicode(value, "utf-8")
-
- return value
-
- return wrapper
-
- pgdb.pgdbTypeCache.typecast = unicast(pgdb.pgdbTypeCache.typecast)
-
class PostgreSQL:
def __init__(self, api):
self.api = api
self.debug = False
+# self.debug = True
self.connection = None
def cursor(self):
if self.connection is None:
# (Re)initialize database connection
- if psycopg2:
- try:
- # Try UNIX socket first
- self.connection = psycopg2.connect(user = self.api.config.PLC_DB_USER,
- password = self.api.config.PLC_DB_PASSWORD,
- database = self.api.config.PLC_DB_NAME)
- except psycopg2.OperationalError:
- # Fall back on TCP
- self.connection = psycopg2.connect(user = self.api.config.PLC_DB_USER,
- password = self.api.config.PLC_DB_PASSWORD,
- database = self.api.config.PLC_DB_NAME,
- host = self.api.config.PLC_DB_HOST,
- port = self.api.config.PLC_DB_PORT)
- self.connection.set_client_encoding("UNICODE")
- else:
- self.connection = pgdb.connect(user = self.api.config.PLC_DB_USER,
- password = self.api.config.PLC_DB_PASSWORD,
- host = "%s:%d" % (api.config.PLC_DB_HOST, api.config.PLC_DB_PORT),
- database = self.api.config.PLC_DB_NAME)
+ try:
+ # Try UNIX socket first
+ self.connection = psycopg2.connect(user = self.api.config.PLC_DB_USER,
+ password = self.api.config.PLC_DB_PASSWORD,
+ database = self.api.config.PLC_DB_NAME)
+ except psycopg2.OperationalError:
+ # Fall back on TCP
+ self.connection = psycopg2.connect(user = self.api.config.PLC_DB_USER,
+ password = self.api.config.PLC_DB_PASSWORD,
+ database = self.api.config.PLC_DB_NAME,
+ host = self.api.config.PLC_DB_HOST,
+ port = self.api.config.PLC_DB_PORT)
+ self.connection.set_client_encoding("UNICODE")
(self.rowcount, self.description, self.lastrowid) = \
(None, None, None)
self.connection.close()
self.connection = None
+ # join insists on getting strings
+ @classmethod
+ def quote_string(self, value):
+ return str(PostgreSQL.quote(value))
+
+ @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, self.quote, value)
+ return "ARRAY[%s]" % ", ".join(map (PostgreSQL.quote_string, value))
else:
return pgdb._quote(value)
- quote = classmethod(quote)
-
+ @classmethod
def param(self, name, value):
# None is converted to the unquoted string NULL
if isinstance(value, NoneType):
return '%(' + name + ')' + conversion
- param = classmethod(param)
-
def begin_work(self):
# Implicit in pgdb.connect()
pass
cursor.close()
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
+
def last_insert_id(self, table_name, primary_key):
if isinstance(self.lastrowid, int):
sql = "SELECT %s FROM %s WHERE oid = %d" % \
return None
+ # 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
+ # or a tuple of several dicts, in which case it executemany's
def execute(self, query, params = None):
- return self.execute_array(query, (params,))
- def execute_array(self, query, param_seq):
cursor = self.cursor()
try:
- if self.debug:
- for params in param_seq:
- if params:
- print >> log, query % params
- else:
- print >> log, query
# psycopg2 requires %()s format for all parameters,
# regardless of type.
+ # this needs to be done carefully though as with pattern-based filters
+ # we might have percents embedded in the query
+ # so e.g. GetPersons({'email':'*fake*'}) was resulting in .. LIKE '%sake%'
if psycopg2:
query = re.sub(r'(%\([^)]*\)|%)[df]', r'\1s', query)
-
- cursor.executemany(query, param_seq)
+ # rewrite wildcards set by Filter.py as '***' into '%'
+ query = query.replace ('***','%')
+
+ if not params:
+ if self.debug:
+ print >> log,'execute0',query
+ cursor.execute(query)
+ elif isinstance(params,dict):
+ if self.debug:
+ print >> log,'execute-dict: params',params,'query',query%params
+ cursor.execute(query,params)
+ elif isinstance(params,tuple) and len(params)==1:
+ if self.debug:
+ print >> log,'execute-tuple',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
+ cursor.executemany(query, param_seq)
(self.rowcount, self.description, self.lastrowid) = \
(cursor.rowcount, cursor.description, cursor.lastrowid)
except Exception, e:
print >> log, "Query:"
print >> log, query
print >> log, "Params:"
- print >> log, pformat(param_seq[0])
+ print >> log, pformat(params)
raise PLCDBError("Please contact " + \
self.api.config.PLC_NAME + " Support " + \
"<" + self.api.config.PLC_MAIL_SUPPORT_ADDRESS + ">" + \
cursor = self.execute(query, params)
rows = cursor.fetchall()
cursor.close()
-
+ self.commit()
if hashref or key_field is not None:
# Return each row as a dictionary keyed on field name
# (like DBI selectrow_hashref()).
git://git.onelab.eu / plcapi.git / blobdiff