1 files changed, 15 insertions, 1 deletions
diff --git a/src/expr.c b/src/expr.c
index b0c61f00f..a4407f4a8 100644
--- a/src/expr.c
+++ b/src/expr.c
@@ -5028,7 +5028,21 @@ int sqlite3ExprCompare(Parse *pParse, Expr *pA, Expr *pB, int iTab){
      && (combinedFlags & EP_Reduced)==0
     ){
       if( pA->iColumn!=pB->iColumn ) return 2;
-      if( pA->op2!=pB->op2 && (pA->op!=TK_FUNCTION || iTab<0) ) return 2;
+      if( pA->op2!=pB->op2 ){
+        if( pA->op==TK_TRUTH ) return 2;
+        if( pA->op==TK_FUNCTION && iTab<0 ){
+          /* Ex: CREATE TABLE t1(a CHECK( a<julianday('now') ));
+          **     INSERT INTO t1(a) VALUES(julianday('now')+10);
+          ** Without this test, sqlite3ExprCodeAtInit() will run on the
+          ** the julianday() of INSERT first, and remember that expression.
+          ** Then sqlite3ExprCodeInit() will see the julianday() in the CHECK
+          ** constraint as redundant, reusing the one from the INSERT, even
+          ** though the julianday() in INSERT lacks the critical NC_IsCheck
+          ** flag.  See ticket [830277d9db6c3ba1] (2019-10-30)
+          */
+          return 2;
+        }
+      }
       if( pA->op!=TK_IN && pA->iTable!=pB->iTable && pA->iTable!=iTab ){
         return 2;
       }