/usr/share/pyshared/gluon/contrib/pymysql/cursors.py is in python-gluon 1.99.7-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 | # -*- coding: utf-8 -*-
import struct
import re
try:
import cStringIO as StringIO
except ImportError:
import StringIO
from err import Warning, Error, InterfaceError, DataError, \
DatabaseError, OperationalError, IntegrityError, InternalError, \
NotSupportedError, ProgrammingError
insert_values = re.compile(r'\svalues\s*(\(.+\))', re.IGNORECASE)
class Cursor(object):
'''
This is the object you use to interact with the database.
'''
def __init__(self, connection):
'''
Do not create an instance of a Cursor yourself. Call
connections.Connection.cursor().
'''
from weakref import proxy
self.connection = proxy(connection)
self.description = None
self.rownumber = 0
self.rowcount = -1
self.arraysize = 1
self._executed = None
self.messages = []
self.errorhandler = connection.errorhandler
self._has_next = None
self._rows = ()
def __del__(self):
'''
When this gets GC'd close it.
'''
self.close()
def close(self):
'''
Closing a cursor just exhausts all remaining data.
'''
if not self.connection:
return
try:
while self.nextset():
pass
except:
pass
self.connection = None
def _get_db(self):
if not self.connection:
self.errorhandler(self, ProgrammingError, "cursor closed")
return self.connection
def _check_executed(self):
if not self._executed:
self.errorhandler(self, ProgrammingError, "execute() first")
def setinputsizes(self, *args):
"""Does nothing, required by DB API."""
def setoutputsizes(self, *args):
"""Does nothing, required by DB API."""
def nextset(self):
''' Get the next query set '''
if self._executed:
self.fetchall()
del self.messages[:]
if not self._has_next:
return None
connection = self._get_db()
connection.next_result()
self._do_get_result()
return True
def execute(self, query, args=None):
''' Execute a query '''
from sys import exc_info
conn = self._get_db()
charset = conn.charset
del self.messages[:]
# TODO: make sure that conn.escape is correct
if args is not None:
query = query % conn.escape(args)
if isinstance(query, unicode):
query = query.encode(charset)
result = 0
try:
result = self._query(query)
except:
exc, value, tb = exc_info()
del tb
self.messages.append((exc,value))
self.errorhandler(self, exc, value)
self._executed = query
return result
def executemany(self, query, args):
''' Run several data against one query '''
del self.messages[:]
conn = self._get_db()
if not args:
return
charset = conn.charset
if isinstance(query, unicode):
query = query.encode(charset)
self.rowcount = sum([ self.execute(query, arg) for arg in args ])
return self.rowcount
def callproc(self, procname, args=()):
"""Execute stored procedure procname with args
procname -- string, name of procedure to execute on server
args -- Sequence of parameters to use with procedure
Returns the original args.
Compatibility warning: PEP-249 specifies that any modified
parameters must be returned. This is currently impossible
as they are only available by storing them in a server
variable and then retrieved by a query. Since stored
procedures return zero or more result sets, there is no
reliable way to get at OUT or INOUT parameters via callproc.
The server variables are named @_procname_n, where procname
is the parameter above and n is the position of the parameter
(from zero). Once all result sets generated by the procedure
have been fetched, you can issue a SELECT @_procname_0, ...
query using .execute() to get any OUT or INOUT values.
Compatibility warning: The act of calling a stored procedure
itself creates an empty result set. This appears after any
result sets generated by the procedure. This is non-standard
behavior with respect to the DB-API. Be sure to use nextset()
to advance through all result sets; otherwise you may get
disconnected.
"""
conn = self._get_db()
for index, arg in enumerate(args):
q = "SET @_%s_%d=%s" % (procname, index, conn.escape(arg))
if isinstance(q, unicode):
q = q.encode(conn.charset)
self._query(q)
self.nextset()
q = "CALL %s(%s)" % (procname,
','.join(['@_%s_%d' % (procname, i)
for i in range(len(args))]))
if isinstance(q, unicode):
q = q.encode(conn.charset)
self._query(q)
self._executed = q
return args
def fetchone(self):
''' Fetch the next row '''
self._check_executed()
if self._rows is None or self.rownumber >= len(self._rows):
return None
result = self._rows[self.rownumber]
self.rownumber += 1
return result
def fetchmany(self, size=None):
''' Fetch several rows '''
self._check_executed()
end = self.rownumber + (size or self.arraysize)
result = self._rows[self.rownumber:end]
if self._rows is None:
return None
self.rownumber = min(end, len(self._rows))
return result
def fetchall(self):
''' Fetch all the rows '''
self._check_executed()
if self._rows is None:
return None
if self.rownumber:
result = self._rows[self.rownumber:]
else:
result = self._rows
self.rownumber = len(self._rows)
return result
def scroll(self, value, mode='relative'):
self._check_executed()
if mode == 'relative':
r = self.rownumber + value
elif mode == 'absolute':
r = value
else:
self.errorhandler(self, ProgrammingError,
"unknown scroll mode %s" % mode)
if r < 0 or r >= len(self._rows):
self.errorhandler(self, IndexError, "out of range")
self.rownumber = r
def _query(self, q):
conn = self._get_db()
self._last_executed = q
conn.query(q)
self._do_get_result()
return self.rowcount
def _do_get_result(self):
conn = self._get_db()
self.rowcount = conn._result.affected_rows
self.rownumber = 0
self.description = conn._result.description
self.lastrowid = conn._result.insert_id
self._rows = conn._result.rows
self._has_next = conn._result.has_next
conn._result = None
def __iter__(self):
self._check_executed()
result = self.rownumber and self._rows[self.rownumber:] or self._rows
return iter(result)
Warning = Warning
Error = Error
InterfaceError = InterfaceError
DatabaseError = DatabaseError
DataError = DataError
OperationalError = OperationalError
IntegrityError = IntegrityError
InternalError = InternalError
ProgrammingError = ProgrammingError
NotSupportedError = NotSupportedError
|