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Improvements to the EXPLAIN QUERY PLAN output for EXISTS-to-JOIN.

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FossilOrigin-Name: 6b1ecbaa2ee405be040901dceac45d027d35c313622748ba4dbbd404e297a7fa
This commit is contained in:
drh
2025-07-06 01:19:09 +00:00
parent 8bc112e3e4
commit c701d17366
5 changed files with 16 additions and 22 deletions
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14
src/wherecode.c
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@@ -126,7 +126,6 @@ void sqlite3WhereAddExplainText(
#endif
{
VdbeOp *pOp = sqlite3VdbeGetOp(pParse->pVdbe, addr);
SrcItem *pItem = &pTabList->a[pLevel->iFrom];
sqlite3 *db = pParse->db; /* Database handle */
int isSearch; /* True for a SEARCH. False for SCAN. */
@@ -135,7 +134,6 @@ void sqlite3WhereAddExplainText(
#if defined(SQLITE_DEBUG) && !defined(SQLITE_OMIT_EXPLAIN)
char *zMsg; /* Text to add to EQP output */
#endif
const char *zFormat;
StrAccum str; /* EQP output string */
char zBuf[100]; /* Initial space for EQP output string */
@@ -150,14 +148,10 @@ void sqlite3WhereAddExplainText(
sqlite3StrAccumInit(&str, db, zBuf, sizeof(zBuf), SQLITE_MAX_LENGTH);
str.printfFlags = SQLITE_PRINTF_INTERNAL;
if( pItem->fg.fromExists ){
zFormat = "SINGLETON %S";
}else if( isSearch ){
zFormat = "SEARCH %S";
}else{
zFormat = "SCAN %S";
}
sqlite3_str_appendf(&str, zFormat, pItem);
sqlite3_str_appendf(&str, "%s %S%s",
isSearch ? "SEARCH" : "SCAN",
pItem,
pItem->fg.fromExists ? " EXISTS" : "");
if( (flags & (WHERE_IPK|WHERE_VIRTUALTABLE))==0 ){
const char *zFmt = 0;
Index *pIdx;