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Fixes to EXPLAIN QUERY PLAN output. Change weights back to something closer

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to what they are in legacy.  More test case fixes.

FossilOrigin-Name: 36373b85f9a97840aa06e24ae31c12fcfbae084e
This commit is contained in:
drh
2013-06-11 02:32:50 +00:00
parent 8636e9c55c
commit 8a4380d761
9 changed files with 36 additions and 37 deletions
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7
src/select.c
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@@ -3884,11 +3884,10 @@ static void explainSimpleCount(
Index *pIdx /* Index used to optimize scan, or NULL */
){
if( pParse->explain==2 ){
char *zEqp = sqlite3MPrintf(pParse->db, "SCAN TABLE %s %s%s(~%d rows)",
char *zEqp = sqlite3MPrintf(pParse->db, "SCAN TABLE %s%s%s",
pTab->zName,
pIdx ? "USING COVERING INDEX " : "",
pIdx ? pIdx->zName : "",
pTab->nRowEst
pIdx ? " USING COVERING INDEX " : "",
pIdx ? pIdx->zName : ""
);
sqlite3VdbeAddOp4(
pParse->pVdbe, OP_Explain, pParse->iSelectId, 0, 0, zEqp, P4_DYNAMIC

2
src/where.c
View File

@@ -4308,7 +4308,7 @@ static int whereLoopAddBtreeIndex(
}else{
/* Each row involves a step of the index, then a binary search of
** the main table */
WhereCost rStepAndSearch = rLogSize>80 ? rLogSize-80 : 1;
WhereCost rStepAndSearch = whereCostAdd(10, rLogSize>17 ? rLogSize-17 : 1);
pNew->rRun = whereCostAdd(pNew->rRun, rStepAndSearch);
}
/* TBD: Adjust nOut for additional constraints */