1 /***************************************************************************
2 * Copyright (C) 2007 by www.databasecache.com *
3 * Contact: praba_tuty@databasecache.com *
5 * This program is free software; you can redistribute it and/or modify *
6 * it under the terms of the GNU General Public License as published by *
7 * the Free Software Foundation; either version 2 of the License, or *
8 * (at your option) any later version. *
10 * This program is distributed in the hope that it will be useful, *
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13 * GNU General Public License for more details. *
15 ***************************************************************************/
20 #include<Transaction.h>
23 #include<CatalogTables.h>
26 #include<DatabaseManagerImpl.h>
51 TupleIterator(Predicate
*p
, ScanType t
, IndexInfo
*i
, void *cptr
, int pslot
)
52 { bIter
= NULL
; pred_
= p
; scanType_
= t
; info
= i
; chunkPtr_
= cptr
; procSlot
=pslot
;}
56 if (bIter
) delete bIter
;
65 class TableImpl
:public Table
72 //This is pointer to the pointer stored in the
73 //Transaction manager.
74 //If the transaction commits/aborts this pointer changes
75 //and this will get that newly allocated transaction
77 char tblName_
[IDENTIFIER_LENGTH
];
79 size_t length_
; //length of the tuple
82 void *curTuple_
; //holds the current tuple ptr. moved during fetch() calls
86 //ChunkIterator *iter;
96 char** indexPtr_
; // array of index ptrs to the catalog table for the indexes of this table.
98 int useIndex_
;//offet in the above array indexPtr_ for scan
104 //Either one of the below is populated based on the no of fields and
105 //is used for tuple insertions
106 bool isIntUsedForNULL
;
114 //copy Values from binded buffer to tuple pointed by arg
115 DbRetVal
copyValuesFromBindBuffer(void *tuple
, bool isInsert
=true);
116 DbRetVal
copyValuesToBindBuffer(void *tuple
);
117 void setNullBit(int fldpos
);
119 DbRetVal
insertIndexNode(Transaction
*trans
, void *indexPtr
, IndexInfo
*info
, void *tuple
);
120 DbRetVal
updateIndexNode(Transaction
*trans
, void *indexPtr
, IndexInfo
*info
, void *tuple
);
121 DbRetVal
deleteIndexNode(Transaction
*trans
, void *indexPtr
, IndexInfo
*info
, void *tuple
);
123 DbRetVal
createPlan();
124 Chunk
* getSystemTableChunk(CatalogTableID id
)
126 return sysDB_
->getSystemDatabaseChunk(id
);
130 TableImpl() { db_
= NULL
; chunkPtr_
= NULL
; iter
= NULL
;
131 idxInfo
= NULL
; indexPtr_
= NULL
; scanType_
= unknownScan
;
132 pred_
= NULL
; useIndex_
= -1; numFlds_
= 0;
133 iNullInfo
= 0; cNullInfo
= NULL
; isIntUsedForNULL
= true;
134 iNotNullInfo
= 0; cNotNullInfo
= NULL
;
135 isPlanCreated
= false; undoFlag
= true;}
138 void setDB(Database
*db
) { db_
= db
; }
139 void setSystemDB(Database
*db
) { sysDB_
= db
; }
140 void setLockManager(LockManager
*lmgr
) { lMgr_
= lmgr
; }
141 void setTrans(Transaction
**t
) { trans
= t
; }
143 DataType
getFieldType(const char *name
)
144 { return fldList_
.getFieldType(name
); }
145 int getFieldOffset(const char *name
)
146 { return fldList_
.getFieldOffset(name
); }
147 size_t getFieldLength(const char *name
)
148 { return fldList_
.getFieldLength(name
); }
150 DbRetVal
getFieldInfo(const char *fieldName
, FieldInfo
*&info
)
151 { return fldList_
.getFieldInfo(fieldName
, info
); }
153 List
getFieldNameList();
156 void setCondition(Condition
*p
)
157 { isPlanCreated
= false; if (p
) pred_
= p
->getPredicate(); else pred_
= NULL
;}
160 DbRetVal
bindFld(const char *name
, void *val
);
162 void markFldNull(const char *name
);
163 void markFldNull(int colpos
);
164 bool isFldNull(const char *name
);
165 bool isFldNull(int colpos
);
168 void clearFldNull(const char *name
);
169 void clearFldNull(int colpos
);
172 DbRetVal
insertTuple();
173 DbRetVal
updateTuple();
175 DbRetVal
deleteTuple();
182 void* fetch(DbRetVal
&rv
);
184 void* fetchNoBind(DbRetVal
&rv
);
194 DbRetVal
lock(bool shared
);
197 DbRetVal
setUndoLogging(bool flag
) { undoFlag
= flag
; }
199 void printSQLIndexString();
200 char* getName() { return tblName_
; }
201 void setTableInfo(char *name
, int tblid
, size_t length
,
202 int numFld
, int numIdx
, void *chunk
);
203 friend class DatabaseManagerImpl
;