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Performance optimization (and size reduction) in sqlite3TriggerList() for the

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common case where there are no TEMP triggers.

FossilOrigin-Name: 0defaf730bdc82212a5d3feeb2e16f16423b1691b0aaa7da1787eb82ea39ae9e
This commit is contained in:
drh 2021-01-29 13:47:36 +00:00
parent 16cd8b96d3
commit f54a80fe5c
3 changed files with 20 additions and 17 deletions
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13
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@ -1,5 +1,5 @@
C Fix\san\sissue\swith\sIN\soperator\soptimization\sintroduced\sby\ncheck-in\s[4a43430fd23f8835]\sand\sdescribed\sby\sticket\s[ee51301f316c09e9].
D 2021-01-27T19:15:06.983
C Performance\soptimization\s(and\ssize\sreduction)\sin\ssqlite3TriggerList()\sfor\sthe\ncommon\scase\swhere\sthere\sare\sno\sTEMP\striggers.
D 2021-01-29T13:47:36.426
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F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@ -607,7 +607,7 @@ F src/test_wsd.c 41cadfd9d97fe8e3e4e44f61a4a8ccd6f7ca8fe9
F src/threads.c 4ae07fa022a3dc7c5beb373cf744a85d3c5c6c3c
F src/tokenize.c c64c49d7c2ec4490c2fef1f24350167ba16b03b0c6cee58ad1a1d70a4325d4e9
F src/treeview.c 4b92992176fb2caefbe06ba5bd06e0e0ebcde3d5564758da672631f17aa51cda
F src/trigger.c 29680c54c1aa088fa1b4d50137d75669a40d5ef814394e321fab1e547868e3d3
F src/trigger.c 731ea5ed6b308574b7dc2a5d2a9187ef5510a3692cc1ea06a34608a084b8f376
F src/update.c 9f126204a6acb96bbe47391ae48e0fc579105d8e76a6d9c4fab3271367476580
F src/upsert.c df8f1727d62b5987c4fd302cd4d7c0c84ae57cd65683c5a34a740dfe24039235
F src/utf.c ee39565f0843775cc2c81135751ddd93eceb91a673ea2c57f61c76f288b041a0
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2
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@ -1 +1 @@
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22
src/trigger.c
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@ -48,28 +48,32 @@ void sqlite3DeleteTriggerStep(sqlite3 *db, TriggerStep *pTriggerStep){
** pTab as well as the triggers lised in pTab->pTrigger.
*/
Trigger *sqlite3TriggerList(Parse *pParse, Table *pTab){
Schema * const pTmpSchema = pParse->db->aDb[1].pSchema;
Trigger *pList = 0; /* List of triggers to return */
Schema *pTmpSchema; /* Schema of the pTab table */
Trigger *pList; /* List of triggers to return */
HashElem *p; /* Loop variable for TEMP triggers */
if( pParse->disableTriggers ){
return 0;
}
pTmpSchema = pParse->db->aDb[1].pSchema;
p = sqliteHashFirst(&pTmpSchema->trigHash);
if( p==0 ){
return pTab->pTrigger;
}
pList = pTab->pTrigger;
if( pTmpSchema!=pTab->pSchema ){
HashElem *p;
assert( sqlite3SchemaMutexHeld(pParse->db, 0, pTmpSchema) );
for(p=sqliteHashFirst(&pTmpSchema->trigHash); p; p=sqliteHashNext(p)){
while( p ){
Trigger *pTrig = (Trigger *)sqliteHashData(p);
if( pTrig->pTabSchema==pTab->pSchema
&& 0==sqlite3StrICmp(pTrig->table, pTab->zName)
){
pTrig->pNext = (pList ? pList : pTab->pTrigger);
pTrig->pNext = pList;
pList = pTrig;
}
p = sqliteHashNext(p);
}
}
return (pList ? pList : pTab->pTrigger);
return pList;
}
/*