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Enhancements to the new sqlite3_stmt_explain() interface implementation and

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documentation.

FossilOrigin-Name: dc98ac6b6de27fc096a715e650067154a545709cf1eecd6c2722ab30a91c2d1d
This commit is contained in:
drh
2023-07-29 15:31:48 +00:00
parent 104e225074
commit 0c6b869263
4 changed files with 23 additions and 18 deletions
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13
src/vdbeapi.c
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@@ -1863,11 +1863,16 @@ int sqlite3_stmt_isexplain(sqlite3_stmt *pStmt){
int sqlite3_stmt_explain(sqlite3_stmt *pStmt, int eMode){
Vdbe *v = (Vdbe*)pStmt;
int rc;
if( v->eVdbeState!=VDBE_READY_STATE ) return SQLITE_BUSY;
if( v->explain==eMode ) return SQLITE_OK;
if( v->zSql==0 || eMode<0 || eMode>2 ) return SQLITE_ERROR;
sqlite3_mutex_enter(v->db->mutex);
if( v->nMem>=10 && (eMode!=2 || v->haveEqpOps) ){
if( v->explain==eMode ){
rc = SQLITE_OK;
}else if( eMode<0 || eMode>2 ){
rc = SQLITE_ERROR;
}else if( (v->prepFlags & SQLITE_PREPARE_SAVESQL)==0 ){
rc = SQLITE_ERROR;
}else if( v->eVdbeState!=VDBE_READY_STATE ){
rc = SQLITE_BUSY;
}else if( v->nMem>=10 && (eMode!=2 || v->haveEqpOps) ){
/* No reprepare necessary */
v->explain = eMode;
rc = SQLITE_OK;