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Add code to maintain indexes with expression arguments across DELETE, INSERT,

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and UPDATE statements.  Legacy tests pass, but the new code paths are still
largely untested.  The query planner currently makes no effort to use
expression indexes.

FossilOrigin-Name: efaabdb71626bdc03768e87e186c72f6f3da75b2
This commit is contained in:
drh
2015-08-25 16:57:52 +00:00
parent a514b8eb0c
commit 1f9ca2c84c
14 changed files with 146 additions and 67 deletions
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8
src/update.c
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@@ -272,7 +272,9 @@ void sqlite3Update(
/* There is one entry in the aRegIdx[] array for each index on the table
** being updated. Fill in aRegIdx[] with a register number that will hold
** the key for accessing each index.
** the key for accessing each index.
**
** FIXME: Be smarter about omitting indexes that use expressions.
*/
for(j=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, j++){
int reg;
@@ -281,7 +283,8 @@ void sqlite3Update(
}else{
reg = 0;
for(i=0; i<pIdx->nKeyCol; i++){
if( aXRef[pIdx->aiColumn[i]]>=0 ){
i16 iIdxCol = pIdx->aiColumn[i];
if( iIdxCol<0 || aXRef[iIdxCol]>=0 ){
reg = ++pParse->nMem;
break;
}
@@ -381,6 +384,7 @@ void sqlite3Update(
if( pWInfo==0 ) goto update_cleanup;
okOnePass = sqlite3WhereOkOnePass(pWInfo, aiCurOnePass);
for(i=0; i<nPk; i++){
assert( pPk->aiColumn[i]>=(-1) );
sqlite3ExprCodeGetColumnOfTable(v, pTab, iDataCur, pPk->aiColumn[i],
iPk+i);
}