add constant

pingcap · Dec 18, 2019 · a166fb1 · a166fb1
1 parent 151336c
commit a166fb1
Showing 1 changed file with 7 additions and 5 deletions.
diff --git a/ast/misc.go b/ast/misc.go
@@ -63,11 +63,12 @@ const (
 	RepeatableRead  = "REPEATABLE-READ"
 
 	// Valid formats for explain statement.
-	ExplainFormatROW  = "row"
-	ExplainFormatDOT  = "dot"
-	ExplainFormatHint = "hint"
-	PumpType          = "PUMP"
-	DrainerType       = "DRAINER"
+	ExplainFormatROW   = "row"
+	ExplainFormatDOT   = "dot"
+	ExplainFormatHint  = "hint"
+	ExplainFormatTrace = "opt_trace"
+	PumpType           = "PUMP"
+	DrainerType        = "DRAINER"
 )
 
 // Transaction mode constants.
@@ -82,6 +83,7 @@ var (
 		ExplainFormatROW,
 		ExplainFormatDOT,
 		ExplainFormatHint,
+		ExplainFormatTrace,
 	}
 )