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-rw-r--r--src/expr.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/expr.c b/src/expr.c
index d0282f714..afa9ba00f 100644
--- a/src/expr.c
+++ b/src/expr.c
@@ -6478,7 +6478,11 @@ static int sqlite3ExprIsIIF(sqlite3 *db, const Expr *pExpr){
if( (z[0]!='i' && z[0]!='I') ) return 0;
if( pExpr->x.pList==0 ) return 0;
pDef = sqlite3FindFunction(db, z, pExpr->x.pList->nExpr, ENC(db), 0);
+#ifdef SQLITE_ENABLE_UNKNOWN_SQL_FUNCTION
+ if( pDef==0 ) return 0;
+#else
if( NEVER(pDef==0) ) return 0;
+#endif
if( (pDef->funcFlags & SQLITE_FUNC_INLINE)==0 ) return 0;
if( NEVER(SQLITE_PTR_TO_INT(pDef->pUserData)!=INLINEFUNC_iif) ) return 0;
}else if( pExpr->op==TK_CASE ){