model: add in union flag (#351)

Signed-off-by: Lonng <heng@lonng.org>
pingcap · Jun 12, 2019 · 939965d · 939965d
1 parent 2bb2c0e
commit 939965d
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/model/flags.go b/model/flags.go
@@ -40,4 +40,6 @@ const (
 	FlagIgnoreZeroInDate = 1 << 7
 	// FlagDividedByZeroAsWarning indicates if DividedByZero should be returned as warning.
 	FlagDividedByZeroAsWarning = 1 << 8
+	// FlagInUnionStmt indicates if this is a UNION statement.
+	FlagInUnionStmt = 1 << 9
 )