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Avoid redundant register loads during index key generation when doing a

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DELETE or INTEGRITY_CHECK on a table with multiple indices.

FossilOrigin-Name: 8f6e6149a165f516be6395fd753e163d52ffd52e
This commit is contained in:
drh
2014-01-04 19:27:05 +00:00
parent 61019c7883
commit 1c2c0b776f
7 changed files with 40 additions and 19 deletions
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7
src/pragma.c
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@@ -1881,8 +1881,10 @@ void sqlite3Pragma(
for(x=sqliteHashFirst(pTbls); x && !isQuick; x=sqliteHashNext(x)){
Table *pTab = sqliteHashData(x);
Index *pIdx, *pPk;
Index *pPrior = 0;
int loopTop;
int iDataCur, iIdxCur;
int r1 = -1;
if( pTab->pIndex==0 ) continue;
pPk = HasRowid(pTab) ? 0 : sqlite3PrimaryKeyIndex(pTab);
@@ -1901,9 +1903,10 @@ void sqlite3Pragma(
loopTop = sqlite3VdbeAddOp2(v, OP_AddImm, 7, 1);
for(j=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, j++){
int jmp2, jmp3, jmp4;
int r1;
if( pPk==pIdx ) continue;
r1 = sqlite3GenerateIndexKey(pParse, pIdx, iDataCur, 0, 0, &jmp3);
r1 = sqlite3GenerateIndexKey(pParse, pIdx, iDataCur, 0, 0, &jmp3,
pPrior, r1);
pPrior = pIdx;
sqlite3VdbeAddOp2(v, OP_AddImm, 8+j, 1); /* increment entry count */
jmp2 = sqlite3VdbeAddOp4Int(v, OP_Found, iIdxCur+j, 0, r1,
pIdx->nColumn);