From 8305e6bf42b72cf4de069949fddefad112d44264 Mon Sep 17 00:00:00 2001
From: riverchu <churiver@outlook.com>
Date: Wed, 14 Jul 2021 15:20:27 +0800
Subject: [PATCH] Add new comma expression

---
 clause/select.go | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/clause/select.go b/clause/select.go
index b93b8769..d8e9f801 100644
--- a/clause/select.go
+++ b/clause/select.go
@@ -43,3 +43,17 @@ func (s Select) MergeClause(clause *Clause) {
 		clause.Expression = s
 	}
 }
+
+// CommaExpression represents a group of expressions separated by commas.
+type CommaExpression struct {
+	Exprs []Expression
+}
+
+func (comma CommaExpression) Build(builder Builder) {
+	for idx, expr := range comma.Exprs {
+		if idx > 0 {
+			_, _ = builder.WriteString(", ")
+		}
+		expr.Build(builder)
+	}
+}