mirror of
https://github.com/gnustep/libs-gdl2.git
synced 2025-02-23 19:30:54 +00:00
565696cba9
o renamed _useAliases to _flags.useAliases o added _flags.hasOuterJoin o call qualifier -sqlStringForSQLExpression: instead of switching on qualifier class in -sqlStringForArrayOfQualifiers:operation: o asserts o fill _contextStack o added outer joins checks in -_flattenRelPath:entity: (Used in Postgresql) * EOAdaptors/Postgres95/Postgres95SQLExpression.m: o subclass joinExpression to avoid building join expression (it's now build in -tableListWithRootEntity o sublass -tableListWithRootEntity to add joins in it. git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gdl2/trunk@18225 72102866-910b-0410-8b05-ffd578937521
616 lines
21 KiB
Objective-C
616 lines
21 KiB
Objective-C
/**
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Postgres95SQLExpression.m <title>Postgres95SQLExpression</title>
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Copyright (C) 2000-2002 Free Software Foundation, Inc.
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Author: Mirko Viviani <mirko.viviani@rccr.cremona.it>
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Date: February 2000
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$Revision$
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$Date$
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<abstract></abstract>
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This file is part of the GNUstep Database Library.
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This product includes software developed by Turbocat's Development.
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<license>
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; see the file COPYING.LIB.
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If not, write to the Free Software Foundation,
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59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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</license>
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**/
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#include "config.h"
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RCS_ID("$Id$")
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#ifndef NeXT_Foundation_LIBRARY
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#include <Foundation/NSUtilities.h>
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#include <Foundation/NSException.h>
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#else
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#include <Foundation/Foundation.h>
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#endif
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#ifndef GNUSTEP
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#include <GNUstepBase/GNUstep.h>
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#endif
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#include <EOControl/EONull.h>
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#include <EOControl/EONSAddOns.h>
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#include <EOControl/EODebug.h>
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#include <EOAccess/EOAttribute.h>
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#include <EOAccess/EOEntity.h>
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#include <EOAccess/EOModel.h>
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#include <EOAccess/EOSchemaGeneration.h>
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#include <Postgres95EOAdaptor/Postgres95SQLExpression.h>
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#include <Postgres95EOAdaptor/Postgres95Adaptor.h>
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#include <Postgres95EOAdaptor/Postgres95Values.h>
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@interface EOSQLExpression (Privat)
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//Ayers: Review (Don't rely on privat method)
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- (NSString*) _aliasForRelatedAttribute: (EOAttribute *)attr
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relationshipPath: (NSString *)keyPath;
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@end
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@implementation Postgres95SQLExpression
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+ (NSString *)formatValue: (id)value
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forAttribute: (EOAttribute *)attribute
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{
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NSString *formatted = nil;
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NSString *externalType;
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NSMutableString *string;
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const char *tempString;
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int i, dif;
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EOFLOGObjectFnStart();
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EOFLOGObjectLevelArgs(@"EOSQLExpression", @"value=%@ class=%@", value,
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[value class]);
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EOFLOGObjectLevelArgs(@"EOSQLExpression",
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@"[EONull null] %p=%@ [EONull null] class=%@",
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[EONull null],
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[EONull null],
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[[EONull null] class]);
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EOFLOGObjectLevelArgs(@"EOSQLExpression",
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@"[value isEqual:[EONull null]]=%s",
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([value isEqual: [EONull null]] ? "YES" : "NO"));
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externalType = [attribute externalType];
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if (!value)
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{
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EOFLOGObjectLevelArgs(@"EOSQLExpression",
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@"NULL case - value=%@ class=%@",
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value, [value class]);
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formatted = @"NULL";
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}
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else if ([value isEqual: [EONull null]])
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{
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EOFLOGObjectLevelArgs(@"EOSQLExpression",
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@"EONULL case - value=%@ class=%@",
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value, [value class]);
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formatted = [value sqlString];
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}
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else if ([externalType hasPrefix: @"int"]
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|| [externalType hasPrefix: @"bigint"])
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{
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EOFLOGObjectLevelArgs(@"EOSQLExpression",
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@"int case - value=%@ class=%@",
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value, [value class]);
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formatted = [NSString stringWithFormat: @"%@", value];
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// value was for example 0 length string
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if ([formatted length] == 0)
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formatted = @"NULL";
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}
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else if ([externalType hasPrefix: @"float"])
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{
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EOFLOGObjectLevelArgs(@"EOSQLExpression",
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@"float case - value=%@ class=%@",
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value, [value class]);
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formatted = [NSString stringWithFormat: @"%@", value];
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// value was for example 0 length string
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if ([formatted length] == 0)
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formatted=@"NULL";
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}
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else if ([externalType hasPrefix: @"bool"])
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{
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EOFLOGObjectLevelArgs(@"EOSQLExpression",
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@"BOOL case - value=%@ class=%@",
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value, [value class]);
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if ([value isKindOfClass: [NSNumber class]] == YES)
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{
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BOOL boolValue = [value boolValue];
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if (boolValue == NO)
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formatted = @"'f'";
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else
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formatted = @"'t'";
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}
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else
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{
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EOFLOGObjectLevelArgs(@"EOSQLExpression",
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@"BOOL case/NSString - value=%@ class=%@",
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value, [value class]);
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formatted = [NSString stringWithFormat: @"'%@'", value];
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// value was for example 0 length string
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if ([formatted length] == 0)
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formatted = @"NULL";
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}
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}
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else if ([externalType isEqualToString: @"oid"])
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{
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EOFLOGObjectLevelArgs(@"EOSQLExpression",
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@"OID case - value=%@ class=%@",
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value, [value class]);
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formatted = [NSString stringWithFormat: @"%@", value];
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// value was for example 0 length string
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if ([formatted length] == 0)
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formatted=@"NULL";
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}
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else if ([externalType isEqualToString: @"money"])
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{
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EOFLOGObjectLevelArgs(@"EOSQLExpression",
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@"Money case - value=%@ class=%@",
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value, [value class]);
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formatted = [NSString stringWithFormat: @"'$%@'", value];
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// value was for example 0 length string
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if ([formatted length] == 3) // only '$'
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formatted = @"NULL";
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}
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else if (([externalType isEqualToString: @"abstime"])
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/*|| ([externalType isEqualToString: @"datetime"])*//* stephane@sente.ch: datetime does not exist */
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|| ([externalType isEqualToString: @"timestamp"]))
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{
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EOFLOGObjectLevelArgs(@"EOSQLExpression",
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@"Time case - value=%@ class=%@",
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value, [value class]);
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if ([[value description] length] == 0)
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{
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NSWarnLog(@"empty description for %p %@ of class %@",
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value, value, [value class]);
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}
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// Value can also be a string...
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if ([value isKindOfClass:[NSDate class]])
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{
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formatted = [NSString stringWithFormat: @"'%@'",
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[value
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descriptionWithCalendarFormat:
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[NSCalendarDate postgres95Format]//@"%d/%m/%Y %H:%M:%S"
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timeZone: nil
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locale: nil]];
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}
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else
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formatted = [NSString stringWithFormat: @"'%@'",value];
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}
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else
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{
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int length = 0;
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EOFLOGObjectLevelArgs(@"EOSQLExpression",
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@"other case - value=%@ class=%@",
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value, [value class]);
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string = [NSMutableString stringWithFormat: @"%@", value];
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EOFLOGObjectLevelArgs(@"EOSQLExpression", @"string %p='%@'",
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string, string);
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length=[string cStringLength];
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tempString = [string cString];
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EOFLOGObjectLevelArgs(@"EOSQLExpression", @"string '%@' tempString=%s",
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string, tempString);
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for (i = 0, dif = 0; i < length; i++)
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{
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switch (tempString[i])
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{
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case '\\':
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case '\'':
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[string insertString: @"\\" atIndex: dif + i];
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dif++;
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break;
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case '_':
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[string insertString: @"\\" atIndex: dif + i];
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dif++;
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break;
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default:
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break;
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}
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}
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EOFLOGObjectLevelArgs(@"EOSQLExpression", @"string '%@' tempString=%s",
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string, tempString);
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formatted = [NSString stringWithFormat: @"'%@'", string];
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EOFLOGObjectLevelArgs(@"EOSQLExpression", @"formatted %p=%@",
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formatted, formatted);
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}
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EOFLOGObjectLevelArgs(@"EOSQLExpression", @"formatted=%@", formatted);
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EOFLOGObjectFnStop();
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return formatted;
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}
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- (NSString *)externalNameQuoteCharacter
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{
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if ([EOSQLExpression useQuotedExternalNames])
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return @"'";
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else
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return @"";
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}
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- (NSString *)lockClause
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{
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return @"FOR UPDATE";
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}
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- (NSString *)assembleSelectStatementWithAttributes: (NSArray *)attributes
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lock: (BOOL)lock
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qualifier: (EOQualifier *)qualifier
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fetchOrder: (NSArray *)fetchOrder
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selectString: (NSString *)selectString
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columnList: (NSString *)columnList
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tableList: (NSString *)tableList
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whereClause: (NSString *)whereClause
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joinClause: (NSString *)joinClause
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orderByClause: (NSString *)orderByClause
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lockClause: (NSString *)lockClause
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{
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//OK
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NSMutableString *sqlString = nil;
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EOFLOGObjectFnStart();
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EOFLOGObjectLevelArgs(@"EOSQLExpression", @"selectString=%@", selectString);
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EOFLOGObjectLevelArgs(@"EOSQLExpression", @"columnList=%@", columnList);
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EOFLOGObjectLevelArgs(@"EOSQLExpression", @"tableList=%@", tableList);
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sqlString = [NSMutableString stringWithFormat: @"%@ %@ FROM %@",
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selectString,
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columnList,
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tableList];
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if (whereClause && joinClause)
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[sqlString appendFormat: @" WHERE (%@) AND (%@)",
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whereClause,
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joinClause];
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else if (whereClause || joinClause)
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[sqlString appendFormat: @" WHERE %@",
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(whereClause ? whereClause : joinClause)];
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if (orderByClause)
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[sqlString appendFormat: @" ORDER BY %@", orderByClause];
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if (lockClause)
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[sqlString appendFormat: @" %@", lockClause];
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EOFLOGObjectFnStop();
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return sqlString;
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}
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+ (NSArray *)dropTableStatementsForEntityGroup:(NSArray *)entityGroup
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{
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EOEntity *entity;
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NSArray *newArray;
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int version;
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EOFLOGClassFnStartOrCond(@"EOSQLExpression");
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entity = [entityGroup objectAtIndex: 0];
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version = [[[[entity model] connectionDictionary]
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objectForKey: @"databaseVersion"] parsedFirstVersionSubstring];
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if (version == 0)
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{
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version = postgresClientVersion();
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}
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if (version < 70300)
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{
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newArray = [super dropTableStatementsForEntityGroup: entityGroup];
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}
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else
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{
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newArray = [NSArray arrayWithObject: [self expressionForString:
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[NSString stringWithFormat: @"DROP TABLE %@ CASCADE",
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[entity externalName]]]];
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}
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EOFLOGClassFnStopOrCond(@"EOSQLExpression");
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return newArray;
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}
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- (void)prepareConstraintStatementForRelationship: (EORelationship *)relationship
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sourceColumns: (NSArray *)sourceColumns
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destinationColumns: (NSArray *)destinationColumns
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{
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// We redefine this method to add "DEFERRABLE INITIALLY DEFERRED": it is needed
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// to be able to insert rows into table related to other table rows, before these
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// other rows have been inserted (relationship might be bidirectional, or it might
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// simply be an operation order problem)
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// Q: shouldn't we move this into EOSQLExpression.m?
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[super prepareConstraintStatementForRelationship:relationship sourceColumns:sourceColumns destinationColumns:destinationColumns];
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ASSIGN(_statement, [_statement stringByAppendingString:@" DEFERRABLE INITIALLY DEFERRED"]);
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}
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/** Build join expression for all used relationships (call this) after all other query parts construction) **/
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- (void)joinExpression
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{
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int contextStackCount=0;
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EOFLOGObjectFnStart();
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contextStackCount=[_contextStack count];
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if (contextStackCount>1 && _flags.hasOuterJoin)
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{
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// No join clause in postgresql, joins are added in -tableList...
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if (_joinClauseString)
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DESTROY(_joinClauseString);
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}
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else
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[super joinExpression];
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EOFLOGObjectFnStop();
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}
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- (NSString *)tableListWithRootEntity: (EOEntity*)entity
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{
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int contextStackCount=0;
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NSString *finalEntitiesString=nil;
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EOFLOGObjectFnStart();
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EOFLOGObjectLevelArgs(@"EOSQLExpression", @"entity=%@", entity);
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EOFLOGObjectLevelArgs(@"EOSQLExpression", @"_aliasesByRelationshipPath=%@",
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_aliasesByRelationshipPath);
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contextStackCount=[_contextStack count];
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if (contextStackCount>1 && _flags.hasOuterJoin)
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{
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// joins are added here and not in join clause.
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NSMutableString *entitiesString = [NSMutableString string];
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NSString *relationshipPath = nil ;
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EOEntity *currentEntity = nil;
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int i = 0;
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int relPathIndex = 0;
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BOOL useAliases=[self useAliases];
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for(relPathIndex=0;relPathIndex<contextStackCount;relPathIndex++)
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{
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relationshipPath = [_contextStack objectAtIndex:relPathIndex];
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currentEntity = entity;
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if ([relationshipPath isEqualToString: @""])
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{
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NSString *externalName = [currentEntity externalName];
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EOFLOGObjectLevelArgs(@"EOSQLExpression",
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@"entity %p named %@: externalName=%@",
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currentEntity, [currentEntity name],
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externalName);
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NSAssert1([externalName length]>0,@"No external name for entity %@",
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[currentEntity name]);
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[entitiesString appendString: externalName];
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EOFLOGObjectLevelArgs(@"EOSQLExpression", @"entitiesString=%@", entitiesString);
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if (useAliases)
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[entitiesString appendFormat: @" %@",
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[_aliasesByRelationshipPath
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objectForKey: relationshipPath]];
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EOFLOGObjectLevelArgs(@"EOSQLExpression", @"entitiesString=%@", entitiesString);
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}
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else
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{
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NSEnumerator *defEnum = nil;
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NSArray *defArray = nil;
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NSString *relationshipString;
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NSString *externalName = nil;
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EORelationship *rel = nil;
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EOQualifier *auxiliaryQualifier = nil;
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NSArray *joins = nil;
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int i, count=0;
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NSMutableString* joinOn=[NSMutableString string];
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EOJoinSemantic joinSemantic;
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NSString* joinOp = nil;
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defArray = [relationshipPath componentsSeparatedByString: @"."];
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defEnum = [defArray objectEnumerator];
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// Get the relationship for this path (non flattened by design)
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rel = [entity relationshipForPath: relationshipPath];
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EOFLOGObjectLevelArgs(@"EOSQLExpression", @"rel=%@", rel);
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NSAssert2(rel, @"No relationship for path %@ in entity %@",
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relationshipPath,
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[entity name]);
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//Get the auxiliary qualifier for this relationship
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auxiliaryQualifier = [rel auxiliaryQualifier];
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if (auxiliaryQualifier)
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{
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NSEmitTODO(); //TODO
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[self notImplemented:_cmd];
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}
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while ((relationshipString = [defEnum nextObject]))
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{
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// use anyRelationshipNamed: to find hidden relationship too
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EORelationship *relationship=[currentEntity
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anyRelationshipNamed: relationshipString];
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NSAssert2(relationship,@"No relationship named %@ in entity %@",
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relationshipString,
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[currentEntity name]);
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NSAssert2(currentEntity,@"No destination entity. Entity %@ relationship = %@",
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[currentEntity name],
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relationship);
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currentEntity = [relationship destinationEntity];
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}
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externalName = [currentEntity externalName];
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EOFLOGObjectLevelArgs(@"EOSQLExpression",
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@"entity %p named %@: externalName=%@",
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currentEntity, [currentEntity name],
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externalName);
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NSAssert1([externalName length]>0,@"No external name for entity %@",
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[currentEntity name]);
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joinSemantic = [rel joinSemantic];
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switch (joinSemantic)
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{
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case EOInnerJoin:
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joinOp = @"INNER JOIN";
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break;
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case EOLeftOuterJoin:
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joinOp = @"LEFT OUTER JOIN";
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break;
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case EORightOuterJoin:
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joinOp = @"RIGHT OUTER JOIN";
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break;
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case EOFullOuterJoin:
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joinOp = @"FULL OUTER JOIN";
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break;
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}
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// Get relationship joins
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joins = [rel joins];
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count = [joins count];
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EOFLOGObjectLevelArgs(@"EOSQLExpression", @"joins=%@", joins);
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// Iterate on each join
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for (i = 0; i < count; i++)
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{
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NSString *sourceRelationshipPath = nil;
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NSArray *sourceRelationshipPathArray;
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//Get the join
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EOJoin *join=[joins objectAtIndex:i];
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// Get source and destination attributes
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EOAttribute *sourceAttribute = [join sourceAttribute];
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EOAttribute *destinationAttribute = [join destinationAttribute];
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NSString *sourceAttributeAlias = nil;
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NSString *destinationAttributeAlias = nil;
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// Build the source relationshipPath
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sourceRelationshipPathArray =
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[relationshipPath componentsSeparatedByString: @"."];
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|
sourceRelationshipPathArray =
|
|
[sourceRelationshipPathArray
|
|
subarrayWithRange:
|
|
NSMakeRange(0,[sourceRelationshipPathArray count] - 1)];
|
|
sourceRelationshipPath = [sourceRelationshipPathArray
|
|
componentsJoinedByString: @"."];
|
|
|
|
EOFLOGObjectLevelArgs(@"EOSQLExpression", @"sourceRelationshipPath=%@", sourceRelationshipPath);
|
|
|
|
// Get the alias for sourceAttribute
|
|
sourceAttributeAlias = [self
|
|
_aliasForRelatedAttribute:
|
|
sourceAttribute
|
|
relationshipPath:
|
|
sourceRelationshipPath];
|
|
|
|
EOFLOGObjectLevelArgs(@"EOSQLExpression", @"sourceAttributeAlias=%@", sourceAttributeAlias);
|
|
|
|
// Get the alias for destinationAttribute
|
|
destinationAttributeAlias =
|
|
[self _aliasForRelatedAttribute: destinationAttribute
|
|
relationshipPath: relationshipPath];
|
|
|
|
EOFLOGObjectLevelArgs(@"EOSQLExpression", @"addJoin=%@ %d %@",
|
|
sourceAttributeAlias,
|
|
(int)joinSemantic,
|
|
destinationAttributeAlias);
|
|
|
|
|
|
if (i>0)
|
|
[joinOn appendString:@", "];
|
|
joinOn = [NSString stringWithFormat: @"%@ = %@",
|
|
sourceAttributeAlias,
|
|
destinationAttributeAlias];
|
|
|
|
EOFLOGObjectLevelArgs(@"EOSQLExpression", @"joinOn=%@", joinOn);
|
|
}
|
|
|
|
[entitiesString appendFormat:@" %@ %@",
|
|
joinOp,
|
|
externalName];
|
|
|
|
EOFLOGObjectLevelArgs(@"EOSQLExpression", @"entitiesString=%@", entitiesString);
|
|
|
|
if (useAliases)
|
|
{
|
|
NSString *alias = [_aliasesByRelationshipPath
|
|
objectForKey: relationshipPath];
|
|
|
|
[entitiesString appendFormat: @" %@",alias];
|
|
|
|
EOFLOGObjectLevelArgs(@"EOSQLExpression",
|
|
@"appending alias %@ in entitiesString",
|
|
alias);
|
|
}
|
|
EOFLOGObjectLevelArgs(@"EOSQLExpression", @"entitiesString=%@", entitiesString);
|
|
|
|
[entitiesString appendFormat:@" on (%@) ",joinOn];
|
|
|
|
EOFLOGObjectLevelArgs(@"EOSQLExpression", @"entitiesString=%@", entitiesString);
|
|
}
|
|
|
|
i++;
|
|
}
|
|
finalEntitiesString=entitiesString;
|
|
}
|
|
else
|
|
finalEntitiesString=[super tableListWithRootEntity:entity];
|
|
|
|
EOFLOGObjectLevelArgs(@"EOSQLExpression",
|
|
@"finalEntitiesString=%@",
|
|
finalEntitiesString);
|
|
|
|
EOFLOGObjectFnStop();
|
|
|
|
return finalEntitiesString;
|
|
}
|
|
|
|
@end
|