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914 lines (777 loc) · 29.7 KB
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# Copyright 2018 SAP SE or an SAP affiliate company.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#
# See the License for the specific language governing permissions and
# limitations under the License.
#
# While not a requirement of the license, if you do modify this file, we
# would appreciate hearing about it. Please email sqlany_interfaces@sap.com
"""SQLAnydb - A DB API v2.0 compatible interface to SQL Anywhere.
This package provides a DB API v2.0 interface
http://www.python.org/dev/peps/pep-0249
to the sqlanywhere dbcapi library.
"""
__version__ = '1.0.14'
import os
import sys
import atexit
import time
import logging
import struct
try:
import exceptions
# pre 3.0
Exception = exceptions.StandardError
bytes = str
str = unicode
v3list = lambda x: x
except:
# 3.0 or later
xrange = range
v3list = list
import codecs
from ctypes import *
from struct import pack, unpack, calcsize
lg = logging.getLogger(__name__)
API_VERSION = 1
API_VERSION_EX = 2
# NB: The following must match those in sacapi.h for the specified API_VERSION!
A_INVALID_TYPE = 0
A_BINARY = 1
A_STRING = 2
A_DOUBLE = 3
A_VAL64 = 4
A_UVAL64 = 5
A_VAL32 = 6
A_UVAL32 = 7
A_VAL16 = 8
A_UVAL16 = 9
A_VAL8 = 10
A_UVAL8 = 11
DT_NOTYPE = 0
DT_DATE = 384
DT_TIME = 388
DT_TIMESTAMP = 392
DT_DATETIMEX = 396
DT_VARCHAR = 448
DT_FIXCHAR = 452
DT_LONGVARCHAR = 456
DT_STRING = 460
DT_DOUBLE = 480
DT_FLOAT = 482
DT_DECIMAL = 484
DT_INT = 496
DT_SMALLINT = 500
DT_BINARY = 524
DT_LONGBINARY = 528
DT_TINYINT = 604
DT_BIGINT = 608
DT_UNSINT = 612
DT_UNSSMALLINT = 616
DT_UNSBIGINT = 620
DT_BIT = 624
DT_LONGNVARCHAR = 640
DD_INVALID = 0x0
DD_INPUT = 0x1
DD_OUTPUT = 0x2
DD_INPUT_OUTPUT = 0x3
class DataValue(Structure):
"""Must match a_sqlany_data_value."""
_fields_ = [("buffer", POINTER(c_char)),
("buffer_size", c_size_t),
("length", POINTER(c_size_t)),
("type", c_int),
("is_null", POINTER(c_int))]
class BindParam(Structure):
"""Must match a_sqlany_bind_param."""
_fields_ = [("direction", c_int),
("value", DataValue),
("name", c_char_p)]
class ColumnInfo(Structure):
"""Must match a_sqlany_column_info."""
_fields_ = [("name", c_char_p),
("type", c_int),
("native_type", c_int),
("precision", c_short),
("scale", c_short),
("max_size", c_size_t),
("nullable", c_int32)]
class DataInfo(Structure):
"""Must match a_sqlany_data_info."""
_fields_ = [("index", c_int),
("type", c_int),
("is_null", c_int),
("data_size", c_size_t)]
def init_sacapi(api):
sacapi_i32 = c_int32
sacapi_bool = sacapi_i32
sacapi_u32 = c_uint32
p_sacapi_u32 = POINTER(sacapi_u32)
p_sqlany_interface_context = c_void_p
p_sqlany_connection = c_void_p
p_sqlany_stmt = c_void_p
p_sqlany_bind_param = c_void_p
p_sqlany_bind_param_info = c_void_p
p_sqlany_data_value = c_void_p
p_sqlany_data_info = c_void_p
p_sqlany_column_info = c_void_p
def defun(name, *types):
try:
setattr(api, name, CFUNCTYPE(*types)((name, api),))
except:
pass
defun("sqlany_init",
sacapi_bool, c_char_p, sacapi_u32, p_sacapi_u32)
defun("sqlany_init_ex",
p_sqlany_interface_context, c_char_p, sacapi_u32, p_sacapi_u32)
defun("sqlany_fini",
None)
defun("sqlany_fini_ex",
None, p_sqlany_interface_context)
defun("sqlany_new_connection",
p_sqlany_connection)
defun("sqlany_new_connection_ex",
p_sqlany_connection, p_sqlany_interface_context)
defun("sqlany_free_connection",
None, p_sqlany_connection)
defun("sqlany_make_connection",
p_sqlany_connection, c_void_p)
defun("sqlany_make_connection_ex",
p_sqlany_connection, p_sqlany_interface_context, c_void_p)
defun("sqlany_connect",
sacapi_bool, p_sqlany_connection, c_char_p)
defun("sqlany_disconnect",
sacapi_bool, p_sqlany_connection)
defun("sqlany_cancel",
None, p_sqlany_connection)
defun("sqlany_execute_immediate",
sacapi_bool, p_sqlany_connection, c_char_p)
defun("sqlany_prepare",
p_sqlany_stmt, p_sqlany_connection, c_char_p)
defun("sqlany_free_stmt",
None, p_sqlany_stmt)
defun("sqlany_num_params",
sacapi_i32, p_sqlany_stmt)
defun("sqlany_describe_bind_param",
sacapi_bool, p_sqlany_stmt, sacapi_u32, p_sqlany_bind_param)
defun("sqlany_bind_param",
sacapi_bool, p_sqlany_stmt, sacapi_u32, p_sqlany_bind_param)
defun("sqlany_send_param_data",
sacapi_bool, p_sqlany_stmt, sacapi_u32, c_void_p, c_size_t)
defun("sqlany_reset",
sacapi_bool, p_sqlany_stmt)
defun("sqlany_get_bind_param_info",
sacapi_bool, p_sqlany_stmt, sacapi_u32, p_sqlany_bind_param_info)
defun("sqlany_execute",
sacapi_bool, p_sqlany_stmt)
defun("sqlany_execute_direct",
p_sqlany_stmt, p_sqlany_connection, c_char_p)
defun("sqlany_fetch_absolute",
sacapi_bool, p_sqlany_stmt, sacapi_i32)
defun("sqlany_fetch_next",
sacapi_bool, p_sqlany_stmt)
defun("sqlany_get_next_result",
sacapi_bool, p_sqlany_stmt)
defun("sqlany_affected_rows",
sacapi_i32, p_sqlany_stmt)
defun("sqlany_num_cols",
sacapi_i32, p_sqlany_stmt)
defun("sqlany_num_rows",
sacapi_i32, p_sqlany_stmt)
defun("sqlany_get_column",
sacapi_bool, p_sqlany_stmt, sacapi_u32, p_sqlany_data_value)
defun("sqlany_get_data",
sacapi_i32, p_sqlany_stmt, sacapi_u32, c_size_t, c_void_p, c_size_t)
defun("sqlany_get_data_info",
sacapi_bool, p_sqlany_stmt, sacapi_u32, p_sqlany_data_info)
defun("sqlany_get_column_info",
sacapi_bool, p_sqlany_stmt, sacapi_u32, p_sqlany_column_info)
defun("sqlany_commit",
sacapi_bool, p_sqlany_connection)
defun("sqlany_rollback",
sacapi_bool, p_sqlany_connection)
defun("sqlany_client_version",
sacapi_bool, c_void_p, c_size_t)
defun("sqlany_client_version_ex",
sacapi_bool, p_sqlany_interface_context, c_void_p, c_size_t)
defun("sqlany_error",
sacapi_i32, p_sqlany_connection, c_void_p, c_size_t)
defun("sqlany_sqlstate",
c_size_t, p_sqlany_connection, c_void_p, c_size_t)
defun("sqlany_clear_error",
None, p_sqlany_connection)
return api
# NB: The preceding must match those in sacapi.h for the specified API_VERSION!
class DBAPISet(frozenset):
"""A special type of set for which A == x is true if A is a
DBAPISet and x is a member of that set."""
def __eq__(self, other):
if isinstance(other, DBAPISet):
return frozenset.__eq__(self, other)
else:
return other in self
def __ne__(self, other):
return not self == other
def __hash__(self):
return frozenset.__hash__(self)
STRING = DBAPISet([DT_VARCHAR,
DT_FIXCHAR,
DT_LONGVARCHAR,
DT_STRING,
DT_LONGNVARCHAR])
BINARY = DBAPISet([DT_BINARY,
DT_LONGBINARY])
NUMBER = DBAPISet([DT_DOUBLE,
DT_FLOAT,
DT_DECIMAL,
DT_INT,
DT_SMALLINT,
DT_TINYINT])
DATE = DBAPISet([DT_DATE])
TIME = DBAPISet([DT_TIME])
TIMESTAMP = DBAPISet([DT_TIMESTAMP,
DT_DATETIMEX])
DATETIME = TIMESTAMP
ROWID = DBAPISet()
ToPyType = {DT_DATE : DATE,
DT_TIME : TIME,
DT_TIMESTAMP : TIMESTAMP,
DT_DATETIMEX : TIMESTAMP,
DT_VARCHAR : STRING,
DT_FIXCHAR : STRING,
DT_LONGVARCHAR : STRING,
DT_STRING : STRING,
DT_DOUBLE : NUMBER,
DT_FLOAT : NUMBER,
DT_DECIMAL : NUMBER,
DT_INT : NUMBER,
DT_SMALLINT : NUMBER,
DT_BINARY : BINARY,
DT_LONGBINARY : BINARY,
DT_TINYINT : NUMBER,
DT_BIGINT : NUMBER,
DT_UNSINT : NUMBER,
DT_UNSSMALLINT : NUMBER,
DT_UNSBIGINT : NUMBER,
DT_BIT : NUMBER,
DT_LONGNVARCHAR : STRING}
class Error(Exception):
def __init__(self,err,sqlcode=0):
self._errortext = err
self._errorcode = sqlcode
@property
def errortext(self): return self._errortext
@property
def errorcode(self): return self._errorcode
def __repr__(self):
return "%s(%s, %s)" % (self.__class__.__name__, repr(self.errortext),
repr(self.errorcode))
def __str__(self):
return repr((self.errortext, self.errorcode))
class Warning(Exception):
"""Raise for important warnings like data truncation while inserting."""
def __init__(self,err,sqlcode=0):
self._errortext = err
self._errorcode = sqlcode
@property
def errortext(self): return self._errortext
@property
def errorcode(self): return self._errorcode
def __repr__(self):
return "%s(%s, %s)" % (self.__class__.__name__, repr(self.errortext),
repr(self.errorcode))
def __str__(self):
return repr((self.errortext, self.errorcode))
class InterfaceError(Error):
"""Raise for interface, not database, related errors."""
def __init__(self, *args):
super(InterfaceError,self).__init__(*args)
class DatabaseError(Error):
def __init__(self, *args):
super(DatabaseError,self).__init__(*args)
class InternalError(DatabaseError):
"""Raise for internal errors: cursor not valid, etc."""
def __init__(self, *args):
super(InternalError,self).__init__(*args)
class OperationalError(DatabaseError):
"""Raise for database related errors, not under programmer's control:
unexpected disconnect, memory allocation error, etc."""
def __init__(self, *args):
super(OperationalError,self).__init__(*args)
class ProgrammingError(DatabaseError):
"""Raise for programming errors: table not found, incorrect syntax, etc."""
def __init__(self, *args):
super(ProgrammingError,self).__init__(*args)
class IntegrityError(DatabaseError):
"""Raise for database constraint failures: missing primary key, etc."""
def __init__(self, *args):
super(IntegrityError,self).__init__(*args)
class DataError(DatabaseError):
def __init__(self, *args):
super(DataError,self).__init__(*args)
class NotSupportedError(DatabaseError):
"""Raise for methods or APIs not supported by database."""
def __init__(self, *args):
super(NotSupportedError,self).__init__(*args)
def standardErrorHandler(connection, cursor, errorclass, errorvalue, sqlcode=0):
error=(errorclass, errorvalue)
if connection:
connection.messages.append(error)
if cursor:
cursor.messages.append(error)
if errorclass != Warning:
raise errorclass(errorvalue,sqlcode)
# format types indexed by A_* values
format = 'xxxdqQiIhHbB'
def mk_valueof(raw, char_set):
def valueof(data):
if data.is_null.contents:
return None
elif data.type in raw:
return data.buffer[:data.length.contents.value]
elif data.type in (A_STRING,):
return data.buffer[:data.length.contents.value].decode(char_set)
else:
fmt = format[data.type]
return unpack(fmt, data.buffer[:calcsize(fmt)])[0]
return valueof
def mk_assign(char_set):
def assign(param, value):
is_null = value is None
param.value.is_null = pointer(c_int(is_null))
if is_null and param.direction == DD_INPUT:
value = 0
if param.value.type == A_INVALID_TYPE:
if is_null and param.direction == DD_INPUT:
param.value.type = A_STRING
elif isinstance(value, int):
if value >= 0:
param.value.type = A_UVAL64
else:
param.value.type = A_VAL64
elif isinstance(value, float):
param.value.type = A_DOUBLE
elif isinstance(value, Binary):
param.value.type = A_BINARY
else:
param.value.type = A_STRING
fmt = format[param.value.type]
if fmt == 'x':
if isinstance(value, bytes):
pass
elif isinstance(value, str):
value = value.encode(char_set)
else:
value = str(value).encode(char_set)
size = length = len(value)
if param.direction != DD_INPUT:
if size < param.value.buffer_size:
size = param.value.buffer_size
buffer = create_string_buffer(value)
else:
buffer = create_string_buffer(pack(fmt, value))
size = length = calcsize(fmt)
param.value.buffer = cast(buffer, POINTER(c_char))
param.value.buffer_size = c_size_t(size)
param.value.length = pointer(c_size_t(length))
return assign
threadsafety = 1
apilevel = '2.0'
paramstyle = 'qmark'
__all__ = [ 'threadsafety', 'apilevel', 'paramstyle', 'connect']
def find_dbcapi_path():
for p in sys.path:
if os.path.isdir(p):
for f in os.listdir(p):
if f.lower() == 'dbcapi.dll':
return p
return None
def load_library(*names):
if sys.version_info >= (3, 8) and sys.platform == 'win32' and os.getenv('SQLANY_API_DLL') is None:
dbcapi_dir = None
if os.getenv('IQDIR17') is not None or os.getenv('SQLANY17') is not None:
if os.getenv('IQDIR17') is not None:
iqpath = os.getenv('IQDIR17')
else:
iqpath = os.getenv('SQLANY17')
pointersize = struct.calcsize("P") * 8
if pointersize == 64:
dbcapi_dir = os.path.join(iqpath, 'bin64')
else:
dbcapi_dir = os.path.join(iqpath, 'bin32')
else:
dbcapi_dir = find_dbcapi_path()
if dbcapi_dir is None:
raise InterfaceError("Could not find dbcapi.dll. Please append the directory that contains dbcapi.dll to PYTHONPATH")
else:
os.add_dll_directory( dbcapi_dir )
for name in names:
if name is None or name == '':
continue
try:
dll = cdll.LoadLibrary(name)
lg.debug("Successfully loaded dbcapi library '%s' with name '%s'", dll, name)
return init_sacapi(dll)
except OSError as ose:
continue
raise InterfaceError("Could not load dbcapi. Tried: " + ','.join(map(str, names)))
class Root(object):
connections = []
def __init__(self, name):
lg.debug("Attempting to load dbcapi library")
self.api = load_library(os.getenv( 'SQLANY_API_DLL', None ), 'dbcapi.dll', 'libdbcapi_r.so',
'libdbcapi_r.dylib')
ver = c_uint(0)
try:
self.api.sqlany_init_ex.restype = POINTER(c_int)
lg.debug("Attempting to initalize dbcapi context (self.api.sqlany_init_ex) with arguments:" \
" app name: '%s', api version: '%s'",
name, API_VERSION_EX)
context = self.api.sqlany_init_ex(name.encode('utf-8'), API_VERSION_EX, byref(ver))
if not context:
lg.error("Failed to initalize dbcapi context (self.api.sqlany_init_ex returned NULL)," \
"perhaps you are missing some required sqlanywhere libaries?")
raise InterfaceError("Failed to initalize dbcapi context, dbcapi version %d required." \
" Perhaps you are missing some sqlanywhere libaries?" %
API_VERSION_EX)
else:
lg.debug("Initalization of dbcapi context successful, max api version supported: %s", ver)
def new_connection():
return self.api.sqlany_new_connection_ex(context)
self.api.sqlany_new_connection = new_connection
def fini():
self.api.sqlany_fini_ex(context)
self.api.sqlany_fini = fini
def client_version():
length = 1000
buffer = create_string_buffer(length)
ret = self.api.sqlany_client_version_ex(context, buffer, length)
if ret:
vers = buffer.value
else:
vers = None
return vers
self.api.sqlany_client_version = client_version
except InterfaceError:
raise
except:
if (not self.api.sqlany_init(name.encode('utf-8'), API_VERSION, byref(ver))):
raise InterfaceError("dbcapi version %d required." %
API_VERSION)
self.api.sqlany_new_connection.restype = POINTER(c_int)
# Need to set return type to some pointer type other than void
# to avoid automatic conversion to a (32 bit) int.
self.api.sqlany_prepare.restype = POINTER(c_int)
atexit.register(self.__del__)
def __del__(self):
# close all outstanding connections
myconn = self.connections[:]
for conn in myconn:
conn.close()
# if we fail to load the library, then we won't get a chance
# to even set the 'api' instance variable
if hasattr(self, "api") and self.api:
lg.debug("__del__ called on sqlany.Root object, finalizng dbcapi context")
self.api.sqlany_fini()
self.api = None
def add_conn(self, conn):
self.connections.append(conn)
def remove_conn(self, conn):
self.connections.remove(conn);
def connect(*args, **kwargs):
"""Constructor for creating a connection to a database."""
return Connection(args, kwargs)
class Connection(object):
# cache the api object so we don't have to load and unload every single time
cls_parent = None
def __init__(self, args, kwargs, parent = None):
# make it so we don't load Root() and therefore the
# dbcapi C library just on import
if parent == None:
# cache the Root() object so we don't load it every time
if Connection.cls_parent == None:
parent = Connection.cls_parent = Root("PYTHON")
else:
parent = Connection.cls_parent
self.Error = Error
self.Warning = Warning
self.InterfaceError = InterfaceError
self.DatabaseError = DatabaseError
self.InternalError = InternalError
self.OperationalError = OperationalError
self.ProgrammingError = ProgrammingError
self.IntegrityError = IntegrityError
self.DataError = DataError
self.NotSupportedError = NotSupportedError
self.errorhandler = None
self.messages = []
self.cursors = set()
self.parent, self.api = parent, parent.api
self.c = self.api.sqlany_new_connection();
params = ';'.join(kw+'='+arg for kw, arg in v3list(list(kwargs.items())))
char_set = 'utf-8'
if isinstance(params, str):
params = params.encode(char_set)
if self.api.sqlany_connect(self.c, params):
self.valueof = mk_valueof((A_BINARY, A_STRING), char_set)
self.assign = mk_assign(char_set)
self.char_set = char_set
cur = self.cursor()
try:
cur.execute("select connection_property('CharSet')")
char_set = cur.fetchone()[0]
if isinstance(char_set, bytes):
char_set = char_set.decode()
# iso_1 means iso-8859-1 in sql anywhere
# details see: http://infocenter.sybase.com/help/index.jsp?topic=/com.sybase.help.sqlanywhere.12.0.1/dbadmin/determining-locale-natlang.html
if(char_set=='iso_1'):
char_set = 'iso-8859-1'
if codecs.lookup(char_set):
self.valueof = mk_valueof((A_BINARY,), char_set)
self.assign = mk_assign(char_set)
self.char_set = char_set
finally:
cur.close()
parent.add_conn(self)
else:
error = self.error()
self.api.sqlany_free_connection(self.c)
self.c = None
self.handleerror(*error)
def __del__(self):
# if we fail to load the library, then we won't get a chance
# to even set the 'c' instance variable
if hasattr(self, "c") and self.c:
self.close()
def handleerror(self, errorclass, errorvalue, sqlcode):
if errorclass:
eh = self.errorhandler or standardErrorHandler
eh(self, None, errorclass, errorvalue, sqlcode)
def con(self):
if not self.c:
self.handleerror(InterfaceError, "not connected", -101)
return self.c
def commit(self):
self.messages = []
return self.api.sqlany_commit(self.con())
def rollback(self):
self.messages = []
return self.api.sqlany_rollback(self.con())
def cancel(self):
self.messages = []
try:
return self.api.sqlany_cancel(self.con())
except AttributeError:
self.handleerror(InterfaceError, "cancel not supported", -1965)
def mk_error():
buf = create_string_buffer(256)
buf_size = sizeof(buf)
def error(self):
rc = self.api.sqlany_error(self.con(), buf, buf_size)
if rc == 0:
return (None, None, 0)
elif rc > 0:
return (Warning, buf.value, rc)
elif rc in (-193,-194,-195,-196):
return (IntegrityError, buf.value, rc)
else:
return (OperationalError, buf.value, rc)
return error
error = mk_error()
def clear_error(self):
return self.api.sqlany_clear_error(self.con())
def close(self):
self.messages = []
c = self.con()
if self.c != None:
for x in self.cursors:
x.close(remove=False)
self.cursors = None
self.api.sqlany_disconnect(c)
self.api.sqlany_free_connection(c)
self.parent.remove_conn(self)
self.c = None
def cursor(self):
self.messages = []
x = Cursor(self)
self.cursors.add(x)
return x
def __enter__(self): return self.cursor()
def __exit__(self, exc, value, tb):
if exc:
self.rollback()
else:
self.commit()
class Cursor(object):
class TypeConverter(object):
def __init__(self,types):
def find_converter(t):
return CONVERSION_CALLBACKS.get(t, lambda x: x)
self.converters = v3list(list(map(find_converter, types)))
def gen(self,values):
for converter, value in zip(self.converters, values):
yield converter(value)
def __init__(self, parent):
self.messages = []
self.parent, self.api = parent, parent.api
self.valueof = self.parent.valueof
self.assign = self.parent.assign
self.char_set = self.parent.char_set
self.errorhandler = self.parent.errorhandler
self.arraysize = 1
self.converter = None
self.rowcount = -1
self.__stmt = None
self.description = None
def handleerror(self, errorclass, errorvalue, sqlcode):
if errorclass:
eh = self.errorhandler or standardErrorHandler
eh(self.parent, self, errorclass, errorvalue, sqlcode)
def __stmt_get(self):
if self.__stmt is None:
self.handleerror(InterfaceError, "no statement")
elif not self.__stmt:
self.handleerror(*self.parent.error())
return self.__stmt
def __stmt_set(self, value):
self.__stmt = value
stmt = property(__stmt_get, __stmt_set)
def __del__(self):
self.close()
def con(self):
if not self.parent:
self.handleerror(InterfaceError, "not connected", -101)
return self.parent.con()
def get_stmt(self):
return self.stmt
def new_statement(self, operation):
self.free_statement()
self.stmt = self.api.sqlany_prepare(self.con(), operation)
def free_statement(self):
if self.__stmt:
self.api.sqlany_free_stmt(self.stmt)
self.stmt = None
self.description = None
self.converter = None
self.rowcount = -1
def close(self, remove=True):
p = self.parent
if p:
self.parent = None
if remove:
p.cursors.remove(self)
self.free_statement()
def columns(self):
info = ColumnInfo()
for i in range(self.api.sqlany_num_cols(self.get_stmt())):
self.api.sqlany_get_column_info(self.get_stmt(), i, byref(info))
yield ((info.name.decode('utf-8'),
ToPyType[info.native_type],
None,
info.max_size,
info.precision,
info.scale,
info.nullable),
info.native_type)
def executemany(self, operation, seq_of_parameters):
self.messages = []
def bind(k, col):
param = BindParam()
self.api.sqlany_describe_bind_param(self.stmt, k, byref(param))
(self.assign)(param, col)
self.api.sqlany_bind_param(self.stmt, k, byref(param))
return param
try:
if isinstance(operation, str):
operation = operation.encode(self.char_set)
self.new_statement(operation)
bind_count = self.api.sqlany_num_params(self.stmt)
self.rowcount = 0
for parameters in seq_of_parameters:
parms = [bind(k, col)
for k, col in enumerate(parameters[:bind_count])]
if not self.api.sqlany_execute(self.stmt):
self.handleerror(*self.parent.error())
try:
self.description, types = v3list(list(zip(*self.columns())))
rowcount = self.api.sqlany_num_rows(self.stmt)
self.converter = self.TypeConverter(types)
except ValueError:
rowcount = self.api.sqlany_affected_rows(self.stmt)
self.description = None
self.converter = None
if rowcount < 0:
# Can happen if number of rows is only an estimate
self.rowcount = -1
elif self.rowcount >= 0:
self.rowcount += rowcount
except:
self.rowcount = -1
raise
return [(self.valueof)(param.value) for param in parms]
def execute(self, operation, parameters = ()):
self.executemany(operation, [parameters])
def callproc(self, procname, parameters = ()):
stmt = 'call '+procname+'('+','.join(len(parameters)*('?',))+')'
return self.executemany(stmt, [parameters])
def values(self):
value = DataValue()
for i in range(self.api.sqlany_num_cols(self.get_stmt())):
rc = self.api.sqlany_get_column(self.get_stmt(), i, byref(value))
if rc < 0:
# print "truncation of column %d"%i
self.handleerror(*self.parent.error())
yield (self.valueof)(value)
def rows(self):
if not self.description:
self.handleerror(InterfaceError, "no result set", -872)
while self.api.sqlany_fetch_next(self.get_stmt()):
self.handleerror(*self.parent.error())
yield tuple(self.converter.gen(v3list(list(self.values()))))
self.handleerror(*self.parent.error())
def fetchmany(self, size=None):
if size is None:
size = self.arraysize
return [row for i,row in zip(range(size), self.rows())]
def fetchone(self):
rows = self.fetchmany(size=1)
if rows:
return rows[0]
return None
def fetchall(self):
return list(self.rows())
def nextset(self):
self.messages = []
return self.api.sqlany_get_next_result(self.get_stmt()) or None
def setinputsizes(self, sizes):
self.messages = []
pass
def setoutputsize(self, sizes, column):
self.messages = []
pass
def Date(*ymd):
return "%04d/%02d/%02d"%ymd
def Time(*hms):
return "%02d:%02d:%02d"%hms
def Timestamp(*ymdhms):
return "%04d/%02d/%02d %02d:%02d:%02d"%ymdhms
def DateFromTicks(ticks):
return Date(*time.localtime(ticks)[:3])
def TimeFromTicks(ticks):
return Time(*time.localtime(ticks)[3:6])
def TimestampFromTicks(ticks):
return Timestamp(*time.localtime(ticks)[:6])
class Binary( bytes ):
pass
CONVERSION_CALLBACKS = {}
def register_converter(datatype, callback):
CONVERSION_CALLBACKS[datatype] = callback