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libs-gdl2/EOAdaptors/PostgreSQLAdaptor/PostgreSQLExpression.m
Sebastian Reitenbach 2d60697be7 * nearly every file 
get rid of RCSID/RCS_ID

as shortly discussed with David and Manuel



git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gdl2/trunk@37928 72102866-910b-0410-8b05-ffd578937521
2014-05-30 17:37:46 +00:00

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/**
PostgreSQLExpression.m <title>PostgreSQLExpression</title>
Copyright (C) 2000-2002,2003,2004,2005 Free Software Foundation, Inc.
Author: Mirko Viviani <mirko.viviani@gmail.com>
Date: February 2000
$Revision$
$Date$
<abstract></abstract>
This file is part of the GNUstep Database Library.
This product includes software developed by Turbocat's Development.
<license>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 3 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; see the file COPYING.LIB.
If not, write to the Free Software Foundation,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
</license>
**/
#include "config.h"
#ifdef GNUSTEP
#include <Foundation/NSData.h>
#include <Foundation/NSDebug.h>
#include <Foundation/NSDecimal.h>
#include <Foundation/NSDecimalNumber.h>
#include <Foundation/NSDictionary.h>
#include <Foundation/NSEnumerator.h>
#include <Foundation/NSException.h>
#else
#include <Foundation/Foundation.h>
#endif
#ifndef GNUSTEP
#include <GNUstepBase/GNUstep.h>
#include <GNUstepBase/NSDebug+GNUstepBase.h>
#include <GNUstepBase/NSObject+GNUstepBase.h>
#endif
#include <EOControl/EONull.h>
#include <EOControl/EONSAddOns.h>
#include <EOControl/EODebug.h>
#include <EOAccess/EOAttribute.h>
#include <EOAccess/EOEntity.h>
#include <EOAccess/EOModel.h>
#include <EOAccess/EOSchemaGeneration.h>
#include "PostgreSQLExpression.h"
#include "PostgreSQLAdaptor.h"
#include "PostgreSQLCompatibility.h"
#include "PostgreSQLPrivate.h"
/* These methods are undocumented but exist in GDL2 and WO4.5.
Ayers: Review (Don't rely on them) */
@interface EOEntity (Undocumented)
- (EORelationship *)relationshipForPath: (NSString *)path;
@end
@interface EOSQLExpression (PrivatUndocumented)
- (NSString*) _aliasForRelatedAttribute: (EOAttribute *)attr
relationshipPath: (NSString *)keyPath;
@end
@implementation PostgreSQLExpression
+ (void) initialize
{
static BOOL initialized=NO;
if (!initialized)
{
initialized=YES;
PSQLA_PrivInit();
};
};
+ (NSString *)formatValue: (id)value
forAttribute: (EOAttribute *)attribute
{
NSString *formatted = nil;
NSString *externalType;
EOFLOGObjectFnStart();
EOFLOGObjectLevelArgs(@"EOSQLExpression", @"value=%@ class=%@", value,
[value class]);
EOFLOGObjectLevelArgs(@"EOSQLExpression",
@"[EONull null] %p=%@ [EONull null] class=%@",
[EONull null],
[EONull null],
[[EONull null] class]);
EOFLOGObjectLevelArgs(@"EOSQLExpression",
@"[value isEqual:[EONull null]]=%s",
([value isEqual: [EONull null]] ? "YES" : "NO"));
externalType = [attribute externalType];
if ((!value) || ((value==[EONull null])))
{
return @"NULL";
}
else if ([externalType hasPrefix: @"int"]
|| [externalType hasPrefix: @"bigint"])
{
formatted = [NSString stringWithFormat: @"%@", value];
// value was for example 0 length string
if ([formatted length] == 0)
formatted = @"NULL";
}
else if ([externalType hasPrefix: @"float"])
{
/*
* 12345.67 has a precision of 7 and a scale of 2.
*/
return [NSString stringWithFormat:@"%@",value];
/*
unsigned short precision=[attribute precision];
int scale=[attribute scale];
// As far as I understand, we need to try to do complex things if precision!=0 or scale!=0
if (precision==0 && scale==0)
{
// just convert it to string...
formatted = [NSString stringWithFormat: @"%@", value];
}
else
{
NSDecimalNumber* decimalValue=nil;
if ([value isKindOfClass: PSQLA_NSDecimalNumberClass] == NO)
{
if ([value isKindOfClass: PSQLA_NSStringClass] == YES)
{
decimalValue = AUTORELEASE([PSQLA_alloc(NSDecimalNumber)
initWithString:value]);
}
else if ([value respondsToSelector: @selector(doubleValue)])
{
decimalValue = AUTORELEASE([PSQLA_alloc(NSDecimalNumber)
initWithDouble:[value doubleValue]]);
}
else if ([value respondsToSelector: @selector(floatValue)])
{
decimalValue = AUTORELEASE([PSQLA_alloc(NSDecimalNumber)
initWithFloat:[value floatValue]]);
}
else if ([value respondsToSelector: @selector(intValue)])
{
decimalValue = AUTORELEASE([PSQLA_alloc(NSDecimalNumber)
initWithInt:[value intValue]]);
}
if (decimalValue)
{
NSDecimal decimal;
NSDecimalNumberHandler* handler=[NSDecimalNumberHandler decimalNumberHandlerWithRoundingMode:NSRoundPlain // Is Plain OK ?
scale:scale
raiseOnExactness:YES
raiseOnOverflow:YES
raiseOnUnderflow:YES
raiseOnDivideByZero:YES];
decimalValue=[decimalValue decimalNumberByRoundingAccordingToBehavior:handler];
decimal=[decimalValue decimalValue];
formatted=NSDecimalString(&decimal,nil);
}
else
{
// Not supported type: just convert it to string...
formatted = [NSString stringWithFormat: @"%@", value];
};
};
};
// value was for example 0 length string
if ([formatted length] == 0)
formatted=@"NULL";
*/
}
else if ([externalType hasPrefix: @"bool"])
{
if ([value isKindOfClass: PSQLA_NSNumberClass] == YES)
{
BOOL boolValue = [value boolValue];
if (boolValue == NO)
formatted = @"'f'";
else
formatted = @"'t'";
}
else
{
EOFLOGObjectLevelArgs(@"EOSQLExpression",
@"BOOL case/NSString - value=%@ class=%@",
value, [value class]);
formatted = [NSString stringWithFormat: @"'%@'", value];
// value was for example 0 length string
if ([formatted length] == 0)
formatted = @"NULL";
}
}
else if ([externalType isEqualToString: @"oid"])
{
EOFLOGObjectLevelArgs(@"EOSQLExpression",
@"OID case - value=%@ class=%@",
value, [value class]);
formatted = [NSString stringWithFormat: @"%@", value];
// value was for example 0 length string
if ([formatted length] == 0)
formatted=@"NULL";
}
else if ([externalType isEqualToString: @"money"])
{
EOFLOGObjectLevelArgs(@"EOSQLExpression",
@"Money case - value=%@ class=%@",
value, [value class]);
formatted = [NSString stringWithFormat: @"'$%@'", value];
// value was for example 0 length string
if ([formatted length] == 3) // only '$'
formatted = @"NULL";
}
else if (([externalType isEqualToString: @"abstime"])
/*|| ([externalType isEqualToString: @"datetime"])*//* stephane@sente.ch: datetime does not exist */
|| ([externalType isEqualToString: @"timestamp"]))
{
EOFLOGObjectLevelArgs(@"EOSQLExpression",
@"Time case - value=%@ class=%@",
value, [value class]);
if ([[value description] length] == 0)
{
NSWarnLog(@"empty description for %p %@ of class %@",
value, value, [value class]);
}
// Value can also be a string...
if ([value isKindOfClass: PSQLA_NSDateClass])
{
NSString *format;
format = [value descriptionWithCalendarFormat:
PSQLA_postgresCalendarFormat
timeZone: nil
locale: nil];
formatted = [NSString stringWithFormat: @"'%@'", format];
}
else
formatted = [NSString stringWithFormat: @"'%@'",value];
}
else if ([externalType isEqualToString: @"bytea"])
{
unsigned char *escapedString;
size_t newLength;
EOFLOGObjectLevelArgs(@"EOSQLExpression",
@"bytea case - value=%@ class=%@",
value, [value class]);
escapedString = PQescapeBytea ((unsigned char *)[value bytes],
[value length],
&newLength);
/* Note that the value returned in newLength is unreliable. */
formatted = [NSString stringWithFormat: @"'%s'", escapedString];
if (escapedString)
{
PQfreemem (escapedString);
}
}
else // String...
{
NSMutableString *string = [NSMutableString stringWithFormat:@"%@", value];
unsigned i, dif;
unsigned length = [string length];
if (length > 0)
{
unichar tempString[length];
[string getCharacters:tempString];
for (i = 0, dif = 0; i < length; i++)
{
switch (tempString[i])
{
case '\'':
[string insertString: @"'" atIndex: dif + i];
dif++;
break;
case '\\':
[string insertString: @"\\" atIndex: dif + i];
dif++;
break;
default:
break;
}
}
}
formatted = [NSString stringWithFormat: @"'%@'", string];
}
EOFLOGObjectLevelArgs(@"EOSQLExpression", @"formatted=%@", formatted);
EOFLOGObjectFnStop();
return formatted;
}
- (NSString *)lockClause
{
return @"FOR UPDATE";
}
- (NSString *)assembleSelectStatementWithAttributes: (NSArray *)attributes
lock: (BOOL)lock
qualifier: (EOQualifier *)qualifier
fetchOrder: (NSArray *)fetchOrder
selectString: (NSString *)selectString
columnList: (NSString *)columnList
tableList: (NSString *)tableList
whereClause: (NSString *)whereClause
joinClause: (NSString *)joinClause
orderByClause: (NSString *)orderByClause
lockClause: (NSString *)lockClause
{
//OK
NSMutableString *sqlString = nil;
EOFLOGObjectFnStart();
EOFLOGObjectLevelArgs(@"EOSQLExpression", @"selectString=%@", selectString);
EOFLOGObjectLevelArgs(@"EOSQLExpression", @"columnList=%@", columnList);
EOFLOGObjectLevelArgs(@"EOSQLExpression", @"tableList=%@", tableList);
sqlString = [NSMutableString stringWithFormat: @"%@ %@ FROM %@",
selectString,
columnList,
tableList];
if (whereClause && joinClause)
[sqlString appendFormat: @" WHERE (%@) AND (%@)",
whereClause,
joinClause];
else if (whereClause || joinClause)
[sqlString appendFormat: @" WHERE %@",
(whereClause ? whereClause : joinClause)];
if (orderByClause)
[sqlString appendFormat: @" ORDER BY %@", orderByClause];
if (lockClause)
[sqlString appendFormat: @" %@", lockClause];
EOFLOGObjectFnStop();
return sqlString;
}
+ (NSArray *)createDatabaseStatementsForConnectionDictionary: (NSDictionary *)connDict
administrativeConnectionDictionary: (NSDictionary *)admConnDict
{
NSArray *newArray;
NSString *databaseName;
NSString *stmt;
EOSQLExpression *expr;
databaseName = [connDict objectForKey: @"databaseName"];
expr = [self expressionForString: nil];
databaseName = [expr sqlStringForSchemaObjectName: databaseName];
stmt = [NSString stringWithFormat:@"CREATE DATABASE %@", databaseName];
[expr setStatement: stmt];
newArray = [NSArray arrayWithObject: expr];
return newArray;
}
+ (NSArray *)dropDatabaseStatementsForConnectionDictionary: (NSDictionary *)connDict
administrativeConnectionDictionary: (NSDictionary *)admConnDict
{
NSArray *newArray;
NSString *databaseName;
NSString *stmt;
EOSQLExpression *expr;
databaseName = [connDict objectForKey: @"databaseName"];
expr = [self expressionForString: nil];
databaseName = [expr sqlStringForSchemaObjectName: databaseName];
stmt = [NSString stringWithFormat:@"DROP DATABASE %@", databaseName];
[expr setStatement: stmt];
newArray = [NSArray arrayWithObject: expr];
return newArray;
}
+ (NSArray *)dropTableStatementsForEntityGroup:(NSArray *)entityGroup
{
EOEntity *entity;
NSArray *newArray;
int version;
EOFLOGClassFnStartOrCond(@"EOSQLExpression");
entity = [entityGroup objectAtIndex: 0];
version = [[[[entity model] connectionDictionary]
objectForKey: @"databaseVersion"] parsedFirstVersionSubstring];
if (version == 0)
{
version = postgresClientVersion();
}
if (version < 70300)
{
newArray = [super dropTableStatementsForEntityGroup: entityGroup];
}
else
{
EOSQLExpression *sqlExp;
NSString *tableName;
NSString *stmt;
if ([entity isAbstractEntity])
{
return [NSArray array];
}
sqlExp = [self expressionForString: nil];
tableName = [entity externalName];
tableName = [sqlExp sqlStringForSchemaObjectName: tableName];
stmt = [NSString stringWithFormat: @"DROP TABLE %@ CASCADE", tableName];
[sqlExp setStatement: stmt];
newArray = [NSArray arrayWithObject: sqlExp];
}
EOFLOGClassFnStopOrCond(@"EOSQLExpression");
return newArray;
}
- (void)prepareConstraintStatementForRelationship: (EORelationship *)relationship
sourceColumns: (NSArray *)sourceColumns
destinationColumns: (NSArray *)destinationColumns
{
// We redefine this method to add "DEFERRABLE INITIALLY DEFERRED": it is needed
// to be able to insert rows into table related to other table rows, before these
// other rows have been inserted (relationship might be bidirectional, or it might
// simply be an operation order problem)
// Q: shouldn't we move this into EOSQLExpression.m?
[super prepareConstraintStatementForRelationship:relationship sourceColumns:sourceColumns destinationColumns:destinationColumns];
ASSIGN(_statement, [_statement stringByAppendingString:@" DEFERRABLE INITIALLY DEFERRED"]);
}
/** Build join expression for all used relationships (call this) after all other query parts construction) **/
- (void)joinExpression
{
int contextStackCount=0;
EOFLOGObjectFnStart();
contextStackCount=[_contextStack count];
if (contextStackCount>1 && _flags.hasOuterJoin)
{
// No join clause in postgresql, joins are added in -tableList...
if (_joinClauseString)
DESTROY(_joinClauseString);
}
else
[super joinExpression];
EOFLOGObjectFnStop();
}
- (NSString *)tableListWithRootEntity: (EOEntity*)entity
{
int contextStackCount=0;
NSString *finalEntitiesString=nil;
EOFLOGObjectFnStart();
EOFLOGObjectLevelArgs(@"EOSQLExpression", @"entity=%@", entity);
EOFLOGObjectLevelArgs(@"EOSQLExpression", @"_aliasesByRelationshipPath=%@",
_aliasesByRelationshipPath);
EOFLOGObjectLevelArgs(@"EOSQLExpression", @"_flags.hasOuterJoin=%d",
_flags.hasOuterJoin);
contextStackCount=[_contextStack count];
if (contextStackCount>1 && _flags.hasOuterJoin)
{
// joins are added here and not in join clause.
NSMutableString *entitiesString = [NSMutableString string];
NSString *relationshipPath = nil ;
EOEntity *currentEntity = nil;
int i = 0;
int relPathIndex = 0;
BOOL useAliases=[self useAliases];
for(relPathIndex=0;relPathIndex<contextStackCount;relPathIndex++)
{
relationshipPath = [_contextStack objectAtIndex:relPathIndex];
currentEntity = entity;
if ([relationshipPath isEqualToString: @""])
{
NSString *tableName = [currentEntity externalName];
tableName = [self sqlStringForSchemaObjectName: tableName];
EOFLOGObjectLevelArgs(@"EOSQLExpression",
@"entity %p named %@: "
@"externalName=%@ tableName=%@",
currentEntity, [currentEntity name],
[currentEntity externalName], tableName);
NSAssert1([[currentEntity externalName] length]>0,
@"No external name for entity %@",
[currentEntity name]);
[entitiesString appendString: tableName];
EOFLOGObjectLevelArgs(@"EOSQLExpression",
@"entitiesString=%@", entitiesString);
if (useAliases)
[entitiesString appendFormat: @" %@",
[_aliasesByRelationshipPath
objectForKey: relationshipPath]];
EOFLOGObjectLevelArgs(@"EOSQLExpression",
@"entitiesString=%@", entitiesString);
}
else
{
NSEnumerator *defEnum = nil;
NSArray *defArray = nil;
NSString *relationshipString;
NSString *tableName = nil;
EORelationship *rel = nil;
EOQualifier *auxiliaryQualifier = nil;
NSArray *joins = nil;
int i, count=0;
NSMutableString* joinOn=[NSMutableString string];
EOJoinSemantic joinSemantic;
NSString* joinOp = nil;
defArray = [relationshipPath componentsSeparatedByString: @"."];
defEnum = [defArray objectEnumerator];
// Get the relationship for this path (non flattened by design)
rel = [entity relationshipForPath: relationshipPath];
EOFLOGObjectLevelArgs(@"EOSQLExpression", @"rel=%@", rel);
NSAssert2(rel, @"No relationship for path %@ in entity %@",
relationshipPath,
[entity name]);
//Get the auxiliary qualifier for this relationship
auxiliaryQualifier = [rel auxiliaryQualifier];
if (auxiliaryQualifier)
{
NSEmitTODO(); //TODO
[self notImplemented:_cmd];
}
while ((relationshipString = [defEnum nextObject]))
{
// use anyRelationshipNamed: to find hidden relationship too
EORelationship *relationship=[currentEntity
anyRelationshipNamed: relationshipString];
NSAssert2(relationship,@"No relationship named %@ in entity %@",
relationshipString,
[currentEntity name]);
NSAssert2(currentEntity,@"No destination entity. Entity %@ relationship = %@",
[currentEntity name],
relationship);
currentEntity = [relationship destinationEntity];
}
tableName = [currentEntity externalName];
tableName = [self sqlStringForSchemaObjectName: tableName];
EOFLOGObjectLevelArgs(@"EOSQLExpression",
@"entity %p named %@: "
@"externalName=%@ tableName=%@",
currentEntity, [currentEntity name],
[currentEntity externalName], tableName);
NSAssert1([[currentEntity externalName] length]>0,
@"No external name for entity %@",
[currentEntity name]);
joinSemantic = [rel joinSemantic];
switch (joinSemantic)
{
case EOInnerJoin:
joinOp = @"INNER JOIN";
break;
case EOLeftOuterJoin:
joinOp = @"LEFT OUTER JOIN";
break;
case EORightOuterJoin:
joinOp = @"RIGHT OUTER JOIN";
break;
case EOFullOuterJoin:
joinOp = @"FULL OUTER JOIN";
break;
}
// Get relationship joins
joins = [rel joins];
count = [joins count];
EOFLOGObjectLevelArgs(@"EOSQLExpression", @"joins=%@", joins);
// Iterate on each join
for (i = 0; i < count; i++)
{
NSString *sourceRelationshipPath = nil;
NSArray *sourceRelationshipPathArray;
//Get the join
EOJoin *join=[joins objectAtIndex:i];
// Get source and destination attributes
EOAttribute *sourceAttribute = [join sourceAttribute];
EOAttribute *destinationAttribute = [join destinationAttribute];
NSString *sourceAttributeAlias = nil;
NSString *destinationAttributeAlias = nil;
// Build the source relationshipPath
sourceRelationshipPathArray =
[relationshipPath componentsSeparatedByString: @"."];
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,
tableName];
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;
}
// PostgreSQL like seems buggy:
// see http://www.postgresql.org/docs/7.4/interactive/functions-matching.html
// for exemple "ab" doesn't match [_]b
+ (NSString *)sqlPatternFromShellPattern: (NSString *)pattern
{
NSString* sqlPattern=nil;
int patternLength=[pattern length];
if (patternLength==0)
sqlPattern=pattern;
else
{
const char *s, *p, *init = [pattern cString];
NSString *tmp;
NSMutableString *str = [NSMutableString stringWithCapacity:
patternLength];
IMP appendStringIMP = [str methodForSelector:@selector(appendString:)];
for (s = p = init; *s; s++)
{
switch (*s)
{
case '*':
if (s != p)
{
tmp = [(PSQLA_alloc(NSString)) initWithCString: p
length: s-p];
PSQLA_AppendStringWithImp(str, appendStringIMP, tmp);
[tmp release];
}
[str appendString: @"%"];
p = s+1;
break;
case '?':
if (s != p)
{
tmp = [(PSQLA_alloc(NSString)) initWithCString: p
length: s-p];
PSQLA_AppendStringWithImp(str, appendStringIMP, tmp);
[tmp release];
}
(*appendStringIMP)(str,@selector(appendString:),@"_");
p = s+1;
break;
case '%':
if (s != p)
{
tmp = [(PSQLA_alloc(NSString)) initWithCString: p
length: s-p];
PSQLA_AppendStringWithImp(str, appendStringIMP, tmp);
[tmp release];
}
if (s != init && *(s-1) == '[' && *(s+1) == ']')
{
(*appendStringIMP)(str,@selector(appendString:),@"%]");
p = s+2; s++;
}
else
{
(*appendStringIMP)(str,@selector(appendString:),@"[%]");
p = s+1;
}
break;
/*PostgreSQLql doesn't want [_] but want _
case '_':
if (s != p)
(*appendStringIMP)(str,@selector(appendString:),
(*stringWithCString_lengthIMP)
(PSQLA_NSStringClass,PSQLA_stringWithCString_lengthSEL,p,s-p));
if (s != init && *(s-1) == '[' && *(s+1) == ']')
{
(*appendStringIMP)(str,@selector(appendString:),@"_]");
p = s+2; p++;
}
else
{
(*appendStringIMP)(str,@selector(appendString:),@"[_]");
p = s+1;
}
break;
*/
}
}
if (*p)
(*appendStringIMP)(str,@selector(appendString:),[NSString stringWithCString:p]);
sqlPattern=str;
};
EOFLOGObjectLevelArgs(@"EOSQLExpression", @"pattern=%@ => %@",
pattern,sqlPattern);
return sqlPattern;
}
+ (NSString *)sqlPatternFromShellPattern: (NSString *)pattern
withEscapeCharacter: (unichar)escapeCharacter
{
const char *s, *p, *init = [pattern cString];
NSString *tmp;
NSMutableString *str = [NSMutableString stringWithCapacity:
[pattern length]];
IMP appendStringIMP = [str methodForSelector:@selector(appendString:)];
for (s = p = init; *s; s++)
{
switch (*s)
{
case '*':
if (s != p)
{
tmp = [(PSQLA_alloc(NSString)) initWithCString: p
length: s-p];
PSQLA_AppendStringWithImp(str, appendStringIMP, tmp);
[tmp release];
}
PSQLA_AppendStringWithImp(str,appendStringIMP,@"%");
p = s+1;
break;
case '?':
if (s != p)
{
tmp = [(PSQLA_alloc(NSString)) initWithCString: p
length: s-p];
PSQLA_AppendStringWithImp(str, appendStringIMP, tmp);
[tmp release];
}
PSQLA_AppendStringWithImp(str,appendStringIMP,@"_");
p = s+1;
break;
case '%':
if (s != p)
{
tmp = [(PSQLA_alloc(NSString)) initWithCString: p
length: s-p];
PSQLA_AppendStringWithImp(str, appendStringIMP, tmp);
[tmp release];
}
if (s != init && *(s-1) == '[' && *(s+1) == ']')
{
PSQLA_AppendStringWithImp(str,appendStringIMP,@"%]");
p = s+2; s++;
}
else
{
PSQLA_AppendStringWithImp(str,appendStringIMP,@"[%]");
p = s+1;
}
break;
/*PostgreSQLql doesn't want [_] but want _
case '_':
if (s != p)
PSQLA_AppendStringWithImp(str,appendStringIMP,
(*stringWithCString_lengthIMP)
(PSQLA_NSStringClass,PSQLA_stringWithCString_lengthSEL,p,s-p));
if (s != init && *(s-1) == '[' && *(s+1) == ']')
{
PSQLA_AppendStringWithImp(str,appendStringIMP,@"_]");
p = s+2; p++;
}
else
{
PSQLA_AppendStringWithImp(str,appendStringIMP,@"[_]");
p = s+1;
}
break;
*/
}
}
if (*p)
PSQLA_AppendStringWithImp(str,appendStringIMP,[NSString stringWithCString:p]);
return str;
}
- (NSString *)columnTypeStringForAttribute:(EOAttribute *)attribute
{
NSString *extType = [attribute externalType];
NSString *columnTypeString = nil;
if ([extType isEqualToString: @"text"])
{
columnTypeString = [NSString stringWithFormat: @"%@", extType];
}
else
{
columnTypeString = [super columnTypeStringForAttribute: attribute];
}
return columnTypeString;
}
@end
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