comment

Signed-off-by: Andres Taylor <[email protected]>
vitessio · Dec 10, 2024 · a48ced7 · a48ced7
1 parent 7be85da
commit a48ced7
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/go/vt/sqlparser/cow.go → go/vt/sqlparser/copy_on_write.go b/go/vt/sqlparser/cow.go → go/vt/sqlparser/copy_on_write.go
@@ -53,6 +53,9 @@ func CopyOnRewrite(
 	return out
 }
 
+// CopyAndReplaceExpr traverses a syntax tree recursively, starting with root,
+// and replaceFn is called for each node that is an Expr. If replaceFn returns
+// true, the node is replaced with the returned node.
 func CopyAndReplaceExpr(node SQLNode, replaceFn func(node Expr) (Expr, bool)) SQLNode {
 	var replace Expr
 	pre := func(node, _ SQLNode) bool {