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Completely remove the column cache logic, which has been a persistent source

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of bugs for many years.  We recent enhancements to the performance of the
OP_Column opcode, the removing the column cache actually makes speed-check.sh
run faster.  It also saves about 1,800 bytes of code space.

FossilOrigin-Name: 3f5f60cd7529330209027fdae8129cca420cec1050eae50a7750d0b715b56972
This commit is contained in:
drh
2018-08-03 23:04:16 +00:00
parent a4b5fb55f3
commit 02ceed058a
13 changed files with 26 additions and 336 deletions
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3
src/where.c
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@@ -802,7 +802,6 @@ static void constructAutomaticIndex(
VdbeComment((v, "for %s", pTable->zName));
/* Fill the automatic index with content */
sqlite3ExprCachePush(pParse);
pTabItem = &pWC->pWInfo->pTabList->a[pLevel->iFrom];
if( pTabItem->fg.viaCoroutine ){
int regYield = pTabItem->regReturn;
@@ -839,7 +838,6 @@ static void constructAutomaticIndex(
sqlite3VdbeChangeP5(v, SQLITE_STMTSTATUS_AUTOINDEX);
sqlite3VdbeJumpHere(v, addrTop);
sqlite3ReleaseTempReg(pParse, regRecord);
sqlite3ExprCachePop(pParse);
/* Jump here when skipping the initialization */
sqlite3VdbeJumpHere(v, addrInit);
@@ -5077,7 +5075,6 @@ void sqlite3WhereEnd(WhereInfo *pWInfo){
/* Generate loop termination code.
*/
VdbeModuleComment((v, "End WHERE-core"));
sqlite3ExprCacheClear(pParse);
for(i=pWInfo->nLevel-1; i>=0; i--){
int addr;
pLevel = &pWInfo->a[i];