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Overview
| Comment: | Add assert()s to verify that Table objects in the schema never use lookaside memory. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: | 736d6ea677f58e4aa2914fa79a3156b775c5a3f5 |
| User & Date: | drh 2012-05-15 12:49:32 |
Context
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2012-05-20
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| 20:23 | Fix a test case so that it works even with very long pathnames. check-in: ecd4a063 user: drh tags: trunk | |
| 20:14 | Check-in included unrelated debugging code by mistake. Was: Fix a test case in the shell1.test script so that it works even for very long pathnames. Closed-Leaf check-in: 0c0a0398 user: drh tags: mistake | |
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2012-05-17
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| 21:04 | Merge updates from trunk. check-in: 224c65e4 user: mistachkin tags: winrt | |
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2012-05-15
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| 17:15 | When a connection disconnects from a shared-cache database, only delete the in-memory schema if there are no other connections. check-in: 46f4eb54 user: dan tags: shared-schema | |
| 12:49 | Add assert()s to verify that Table objects in the schema never use lookaside memory. check-in: 736d6ea6 user: drh tags: trunk | |
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2012-05-14
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| 12:20 | Add an assert() that verifies that the statement pointer from the sqlite3_prepare() family of functions is always NULL if the routines return other than SQLITE_OK. check-in: 0bb1cfc6 user: drh tags: trunk | |
Changes
Changes to src/build.c.
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** Remove the memory data structures associated with the given
** Table. No changes are made to disk by this routine.
**
** This routine just deletes the data structure. It does not unlink
** the table data structure from the hash table. But it does destroy
** memory structures of the indices and foreign keys associated with
** the table.
*/
void sqlite3DeleteTable(sqlite3 *db, Table *pTable){
Index *pIndex, *pNext;
assert( !pTable || pTable->nRef>0 );
/* Do not delete the table until the reference count reaches zero. */
if( !pTable ) return;
if( ((!db || db->pnBytesFreed==0) && (--pTable->nRef)>0) ) return;
/* Delete all indices associated with this table. */
for(pIndex = pTable->pIndex; pIndex; pIndex=pNext){
pNext = pIndex->pNext;
assert( pIndex->pSchema==pTable->pSchema );
if( !db || db->pnBytesFreed==0 ){
char *zName = pIndex->zName;
................................................................................
#ifndef SQLITE_OMIT_CHECK
sqlite3ExprListDelete(db, pTable->pCheck);
#endif
#ifndef SQLITE_OMIT_VIRTUALTABLE
sqlite3VtabClear(db, pTable);
#endif
sqlite3DbFree(db, pTable);
}
/*
** Unlink the given table from the hash tables and the delete the
** table structure with all its indices and foreign keys.
*/
void sqlite3UnlinkAndDeleteTable(sqlite3 *db, int iDb, const char *zTabName){
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** Remove the memory data structures associated with the given ** Table. No changes are made to disk by this routine. ** ** This routine just deletes the data structure. It does not unlink ** the table data structure from the hash table. But it does destroy ** memory structures of the indices and foreign keys associated with ** the table. ** ** The db parameter is optional. It is needed if the Table object ** contains lookaside memory. (Table objects in the schema do not use ** lookaside memory, but some ephemeral Table objects do.) Or the ** db parameter can be used with db->pnBytesFreed to measure the memory ** used by the Table object. */ void sqlite3DeleteTable(sqlite3 *db, Table *pTable){ Index *pIndex, *pNext; TESTONLY( int nLookaside; ) /* Used to verify lookaside not used for schema */ assert( !pTable || pTable->nRef>0 ); /* Do not delete the table until the reference count reaches zero. */ if( !pTable ) return; if( ((!db || db->pnBytesFreed==0) && (--pTable->nRef)>0) ) return; /* Record the number of outstanding lookaside allocations in schema Tables ** prior to doing any free() operations. Since schema Tables do not use ** lookaside, this number should not change. */ TESTONLY( nLookaside = (db && (pTable->tabFlags & TF_Ephemeral)==0) ? db->lookaside.nOut : 0 ); /* Delete all indices associated with this table. */ for(pIndex = pTable->pIndex; pIndex; pIndex=pNext){ pNext = pIndex->pNext; assert( pIndex->pSchema==pTable->pSchema ); if( !db || db->pnBytesFreed==0 ){ char *zName = pIndex->zName; ................................................................................ #ifndef SQLITE_OMIT_CHECK sqlite3ExprListDelete(db, pTable->pCheck); #endif #ifndef SQLITE_OMIT_VIRTUALTABLE sqlite3VtabClear(db, pTable); #endif sqlite3DbFree(db, pTable); /* Verify that no lookaside memory was used by schema tables */ assert( nLookaside==0 || nLookaside==db->lookaside.nOut ); } /* ** Unlink the given table from the hash tables and the delete the ** table structure with all its indices and foreign keys. */ void sqlite3UnlinkAndDeleteTable(sqlite3 *db, int iDb, const char *zTabName){ |