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Merge the latest trunk changes into tree-explain branch.

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FossilOrigin-Name: 1a360da0f8314f232c224c71829646bc7558892b
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drh
2011-12-10 14:44:31 +00:00
parent 4e2a9c3272 3a0c9c0298
commit a5eec8c8c3
20 changed files with 411 additions and 115 deletions
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24
src/expr.c
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@@ -1375,6 +1375,15 @@ static int isCandidateForInOpt(Select *p){
}
#endif /* SQLITE_OMIT_SUBQUERY */
/*
** Code an OP_Once instruction and allocate space for its flag. Return the
** address of the new instruction.
*/
int sqlite3CodeOnce(Parse *pParse){
Vdbe *v = sqlite3GetVdbe(pParse); /* Virtual machine being coded */
return sqlite3VdbeAddOp1(v, OP_Once, pParse->nOnce++);
}
/*
** This function is used by the implementation of the IN (...) operator.
** It's job is to find or create a b-tree structure that may be used
@@ -1435,6 +1444,7 @@ int sqlite3FindInIndex(Parse *pParse, Expr *pX, int *prNotFound){
int eType = 0; /* Type of RHS table. IN_INDEX_* */
int iTab = pParse->nTab++; /* Cursor of the RHS table */
int mustBeUnique = (prNotFound==0); /* True if RHS must be unique */
Vdbe *v = sqlite3GetVdbe(pParse); /* Virtual machine being coded */
assert( pX->op==TK_IN );
@@ -1445,7 +1455,6 @@ int sqlite3FindInIndex(Parse *pParse, Expr *pX, int *prNotFound){
p = (ExprHasProperty(pX, EP_xIsSelect) ? pX->x.pSelect : 0);
if( ALWAYS(pParse->nErr==0) && isCandidateForInOpt(p) ){
sqlite3 *db = pParse->db; /* Database connection */
Vdbe *v = sqlite3GetVdbe(pParse); /* Virtual machine being coded */
Table *pTab; /* Table <table>. */
Expr *pExpr; /* Expression <column> */
int iCol; /* Index of column <column> */
@@ -1470,10 +1479,9 @@ int sqlite3FindInIndex(Parse *pParse, Expr *pX, int *prNotFound){
*/
assert(v);
if( iCol<0 ){
int iMem = ++pParse->nMem;
int iAddr;
iAddr = sqlite3VdbeAddOp1(v, OP_Once, iMem);
iAddr = sqlite3CodeOnce(pParse);
sqlite3OpenTable(pParse, iTab, iDb, pTab, OP_OpenRead);
eType = IN_INDEX_ROWID;
@@ -1499,12 +1507,11 @@ int sqlite3FindInIndex(Parse *pParse, Expr *pX, int *prNotFound){
&& sqlite3FindCollSeq(db, ENC(db), pIdx->azColl[0], 0)==pReq
&& (!mustBeUnique || (pIdx->nColumn==1 && pIdx->onError!=OE_None))
){
int iMem = ++pParse->nMem;
int iAddr;
char *pKey;
pKey = (char *)sqlite3IndexKeyinfo(pParse, pIdx);
iAddr = sqlite3VdbeAddOp1(v, OP_Once, iMem);
iAddr = sqlite3CodeOnce(pParse);
sqlite3VdbeAddOp4(v, OP_OpenRead, iTab, pIdx->tnum, iDb,
pKey,P4_KEYINFO_HANDOFF);
@@ -1514,6 +1521,7 @@ int sqlite3FindInIndex(Parse *pParse, Expr *pX, int *prNotFound){
sqlite3VdbeJumpHere(v, iAddr);
if( prNotFound && !pTab->aCol[iCol].notNull ){
*prNotFound = ++pParse->nMem;
sqlite3VdbeAddOp2(v, OP_Null, 0, *prNotFound);
}
}
}
@@ -1529,6 +1537,7 @@ int sqlite3FindInIndex(Parse *pParse, Expr *pX, int *prNotFound){
eType = IN_INDEX_EPH;
if( prNotFound ){
*prNotFound = rMayHaveNull = ++pParse->nMem;
sqlite3VdbeAddOp2(v, OP_Null, 0, *prNotFound);
}else{
testcase( pParse->nQueryLoop>(double)1 );
pParse->nQueryLoop = (double)1;
@@ -1601,9 +1610,8 @@ int sqlite3CodeSubselect(
** If all of the above are false, then we can run this code just once
** save the results, and reuse the same result on subsequent invocations.
*/
if( !ExprHasAnyProperty(pExpr, EP_VarSelect) && !pParse->pTriggerTab ){
int mem = ++pParse->nMem;
testAddr = sqlite3VdbeAddOp1(v, OP_Once, mem);
if( !ExprHasAnyProperty(pExpr, EP_VarSelect) ){
testAddr = sqlite3CodeOnce(pParse);
}
#ifndef SQLITE_OMIT_EXPLAIN