Merging upstream version 3.46.0.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 7 insertions, 4 deletions

diff --git a/src/whereexpr.c b/src/whereexpr.c
index daf3d5d..5465dc9 100644
--- a/src/whereexpr.c
+++ b/src/whereexpr.c
@@ -989,7 +989,7 @@ static SQLITE_NOINLINE int exprMightBeIndexed2(
         if( pIdx->aiColumn[i]!=XN_EXPR ) continue;
         assert( pIdx->bHasExpr );
         if( sqlite3ExprCompareSkip(pExpr,pIdx->aColExpr->a[i].pExpr,iCur)==0
-          && pExpr->op!=TK_STRING
+         && !sqlite3ExprIsConstant(0,pIdx->aColExpr->a[i].pExpr)
         ){
           aiCurCol[0] = iCur;
           aiCurCol[1] = XN_EXPR;
@@ -1638,6 +1638,7 @@ void SQLITE_NOINLINE sqlite3WhereAddLimit(WhereClause *pWC, Select *p){
         continue;
       }
       if( pWC->a[ii].leftCursor!=iCsr ) return;
+      if( pWC->a[ii].prereqRight!=0 ) return;
     }
 
     /* Check condition (5). Return early if it is not met. */
@@ -1652,12 +1653,14 @@ void SQLITE_NOINLINE sqlite3WhereAddLimit(WhereClause *pWC, Select *p){
 
     /* All conditions are met. Add the terms to the where-clause object. */
     assert( p->pLimit->op==TK_LIMIT );
-    whereAddLimitExpr(pWC, p->iLimit, p->pLimit->pLeft,
-                      iCsr, SQLITE_INDEX_CONSTRAINT_LIMIT);
-    if( p->iOffset>0 ){
+    if( p->iOffset!=0 && (p->selFlags & SF_Compound)==0 ){
       whereAddLimitExpr(pWC, p->iOffset, p->pLimit->pRight,
                         iCsr, SQLITE_INDEX_CONSTRAINT_OFFSET);
     }
+    if( p->iOffset==0 || (p->selFlags & SF_Compound)==0 ){
+      whereAddLimitExpr(pWC, p->iLimit, p->pLimit->pLeft,
+                        iCsr, SQLITE_INDEX_CONSTRAINT_LIMIT);
+    }
   }
 }