planner: fix generated column causes a server crash (pingcap#16376)

m4ver1k · Apr 15, 2020 · 7e71069 · 7e71069
1 parent 5f05854
commit 7e71069
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Showing 2 changed files with 10 additions and 1 deletion.
diff --git a/expression/integration_test.go b/expression/integration_test.go
@@ -6010,3 +6010,12 @@ func (s *testIntegrationSuite) TestIssue15790(c *C) {
 	tk.MustQuery("SELECT * FROM t0 WHERE -10000000000000000000 | t0.c0 UNION all SELECT * FROM t0;").Check(testkit.Rows("0", "0"))
 	tk.MustExec("drop table t0;")
 }
+
+func (s *testIntegrationSuite) TestIssue15992(c *C) {
+	tk := testkit.NewTestKitWithInit(c, s.store)
+	tk.MustExec("use test;")
+	tk.MustExec("CREATE TABLE t0(c0 INT, c1 INT AS (c0));")
+	tk.MustExec("CREATE INDEX i0 ON t0(c1);")
+	tk.MustQuery("SELECT t0.c0 FROM t0 UNION ALL SELECT 0 FROM t0;").Check(testkit.Rows())
+	tk.MustExec("drop table t0;")
+}
diff --git a/planner/core/logical_plan_builder.go b/planner/core/logical_plan_builder.go
@@ -2824,7 +2824,7 @@ func (b *PlanBuilder) buildDataSource(ctx context.Context, tn *ast.TableName, as
 				if err != nil {
 					return nil, err
 				}
-				colExpr.VirtualExpr = expr
+				colExpr.VirtualExpr = expr.Clone()
 			}
 		}
 	}