From 15b60462a2c7cfd0577252efbb86c154a2f796b0 Mon Sep 17 00:00:00 2001
From: jackyin <648588267@qq.com>
Date: Tue, 21 May 2024 21:51:43 +0800
Subject: [PATCH] driver/pgsql: optimize regex for version matching (#3583)

---
 contrib/drivers/pgsql/pgsql_tables.go | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/contrib/drivers/pgsql/pgsql_tables.go b/contrib/drivers/pgsql/pgsql_tables.go
index a00cc3410..1cdb7d5d3 100644
--- a/contrib/drivers/pgsql/pgsql_tables.go
+++ b/contrib/drivers/pgsql/pgsql_tables.go
@@ -32,6 +32,8 @@ WHERE
 ORDER BY
 	c.relname
 `
+
+	versionRegex = regexp.MustCompile(`PostgreSQL (\d+\.\d+)`)
 )
 
 func init() {
@@ -90,7 +92,7 @@ func (d *Driver) version(ctx context.Context, link gdb.Link) string {
 	}
 	if len(result) > 0 {
 		if v, ok := result[0]["version"]; ok {
-			matches := regexp.MustCompile(`PostgreSQL (\d+\.\d+)`).FindStringSubmatch(v.String())
+			matches := versionRegex.FindStringSubmatch(v.String())
 			if len(matches) >= 2 {
 				return matches[1]
 			}