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Omit unnecessary calls to table locking routines in the common case when

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there is no shared cache.

FossilOrigin-Name: f94f3021cde1d46373ee8fc8e5028d7507a937240c59cf0d0d19ab22acbd3c41
This commit is contained in:
drh
2023-06-20 17:45:19 +00:00
parent c439b9e0c6
commit 40ee72947e
4 changed files with 17 additions and 13 deletions
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8
src/insert.c
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@@ -35,8 +35,10 @@ void sqlite3OpenTable(
assert( pParse->pVdbe!=0 );
v = pParse->pVdbe;
assert( opcode==OP_OpenWrite || opcode==OP_OpenRead );
sqlite3TableLock(pParse, iDb, pTab->tnum,
(opcode==OP_OpenWrite)?1:0, pTab->zName);
if( !pParse->db->noSharedCache ){
sqlite3TableLock(pParse, iDb, pTab->tnum,
(opcode==OP_OpenWrite)?1:0, pTab->zName);
}
if( HasRowid(pTab) ){
sqlite3VdbeAddOp4Int(v, opcode, iCur, pTab->tnum, iDb, pTab->nNVCol);
VdbeComment((v, "%s", pTab->zName));
@@ -2675,7 +2677,7 @@ int sqlite3OpenTableAndIndices(
*piDataCur = iDataCur;
if( HasRowid(pTab) && (aToOpen==0 || aToOpen[0]) ){
sqlite3OpenTable(pParse, iDataCur, iDb, pTab, op);
}else{
}else if( pParse->db->noSharedCache==0 ){
sqlite3TableLock(pParse, iDb, pTab->tnum, op==OP_OpenWrite, pTab->zName);
}
*piIdxCur = iBase;