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Improve EXPLAIN QUERY PLAN output and comments on bytecode listings by

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distinguishing between "subquery" and "join" and using consistent names
across EQP and bytecode.

FossilOrigin-Name: a2d3ee92420ec564e31eb0005367cf7ff3d00bfaed5a98ffdbe17c91c95d9d97
This commit is contained in:
drh
2022-04-22 17:36:10 +00:00
parent 67f70bea06
commit da653b897d
7 changed files with 32 additions and 23 deletions
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4
src/select.c
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@@ -5555,8 +5555,10 @@ int sqlite3ExpandSubquery(Parse *pParse, SrcItem *pFrom){
pTab->nTabRef = 1;
if( pFrom->zAlias ){
pTab->zName = sqlite3DbStrDup(pParse->db, pFrom->zAlias);
}else if( pSel->selFlags & SF_NestedFrom ){
pTab->zName = sqlite3MPrintf(pParse->db, "(join-%u)", pSel->selId);
}else{
pTab->zName = sqlite3MPrintf(pParse->db, "subquery_%u", pSel->selId);
pTab->zName = sqlite3MPrintf(pParse->db, "(subquery-%u)", pSel->selId);
}
while( pSel->pPrior ){ pSel = pSel->pPrior; }
sqlite3ColumnsFromExprList(pParse, pSel->pEList,&pTab->nCol,&pTab->aCol);