From 97451ba2294ef73d76d0aa7073327c85a1bf60a5 Mon Sep 17 00:00:00 2001
From: Cai Yudong <yudong.cai@zilliz.com>
Date: Mon, 27 Sep 2021 23:58:02 +0800
Subject: [PATCH] [skip ci] Add comments for parse bool node (#8552)

Signed-off-by: yudong.cai <yudong.cai@zilliz.com>
---
 internal/proxy/plan_parser.go | 1 +
 1 file changed, 1 insertion(+)

diff --git a/internal/proxy/plan_parser.go b/internal/proxy/plan_parser.go
index 81c80a6f61..ae0d43edd4 100644
--- a/internal/proxy/plan_parser.go
+++ b/internal/proxy/plan_parser.go
@@ -258,6 +258,7 @@ func getLogicalOpType(opStr string) planpb.BinaryExpr_BinaryOp {
 func parseBoolNode(nodeRaw *ant_ast.Node) *ant_ast.BoolNode {
 	switch node := (*nodeRaw).(type) {
 	case *ant_ast.IdentifierNode:
+		// bool node only accept value 'true' or 'false'
 		val := strings.ToLower(node.Value)
 		if val == "true" {
 			return &ant_ast.BoolNode{