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Experimental code to measure memory consumed by database schemas and prepared statements.

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FossilOrigin-Name: 9aa30342f4de4eff630520ea8e07ad253d3f0877
This commit is contained in:
dan
2010-07-24 11:28:28 +00:00
parent 5419ee5f2f
commit d46def77db
14 changed files with 430 additions and 97 deletions
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30
src/fkey.c
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@@ -1158,28 +1158,30 @@ void sqlite3FkDelete(sqlite3 *db, Table *pTab){
for(pFKey=pTab->pFKey; pFKey; pFKey=pNext){
/* Remove the FK from the fkeyHash hash table. */
if( pFKey->pPrevTo ){
pFKey->pPrevTo->pNextTo = pFKey->pNextTo;
}else{
void *data = (void *)pFKey->pNextTo;
const char *z = (data ? pFKey->pNextTo->zTo : pFKey->zTo);
sqlite3HashInsert(&pTab->pSchema->fkeyHash, z, sqlite3Strlen30(z), data);
}
if( pFKey->pNextTo ){
pFKey->pNextTo->pPrevTo = pFKey->pPrevTo;
if( !db || db->pnBytesFreed==0 ){
if( pFKey->pPrevTo ){
pFKey->pPrevTo->pNextTo = pFKey->pNextTo;
}else{
void *p = (void *)pFKey->pNextTo;
const char *z = (p ? pFKey->pNextTo->zTo : pFKey->zTo);
sqlite3HashInsert(&pTab->pSchema->fkeyHash, z, sqlite3Strlen30(z), p);
}
if( pFKey->pNextTo ){
pFKey->pNextTo->pPrevTo = pFKey->pPrevTo;
}
}
/* EV: R-30323-21917 Each foreign key constraint in SQLite is
** classified as either immediate or deferred.
*/
assert( pFKey->isDeferred==0 || pFKey->isDeferred==1 );
/* Delete any triggers created to implement actions for this FK. */
#ifndef SQLITE_OMIT_TRIGGER
fkTriggerDelete(db, pFKey->apTrigger[0]);
fkTriggerDelete(db, pFKey->apTrigger[1]);
#endif
/* EV: R-30323-21917 Each foreign key constraint in SQLite is
** classified as either immediate or deferred.
*/
assert( pFKey->isDeferred==0 || pFKey->isDeferred==1 );
pNext = pFKey->pNextFrom;
sqlite3DbFree(db, pFKey);
}