From a9689a925e09b1bfb638019b3413a28d8f8738b8 Mon Sep 17 00:00:00 2001
From: Looly <loolly@aliyun.com>
Date: Tue, 9 May 2023 10:07:09 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BC=98=E5=8C=96count=E6=9F=A5=E8=AF=A2?=
 =?UTF-8?q?=E5=85=BC=E5=AE=B9informix?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 CHANGELOG.md                                              | 3 ++-
 hutool-db/src/main/java/cn/hutool/db/dialect/Dialect.java | 4 +++-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2ca05792a..ea32dfcd2 100755
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,11 +2,12 @@
 # 🚀Changelog
 
 -------------------------------------------------------------------------------------------------------------
-# 5.8.19.M1 (2023-05-05)
+# 5.8.19.M1 (2023-05-09)
 
 ### 🐣新特性
 * 【db    】      优化HttpRequest.toString()内容打印（issue#3072@Github）
 * 【poi   】      优化Sax方式读取时空白行返回0，修改为返回-1（issue#I6WYF6@Gitee）
+* 【db    】      优化count查询兼容informix（issue#I713XQ@Gitee）
 
 ### 🐞Bug修复
 * 【core  】      修复URLUtil.decode无法解码UTF-16问题（issue#3063@Github）
diff --git a/hutool-db/src/main/java/cn/hutool/db/dialect/Dialect.java b/hutool-db/src/main/java/cn/hutool/db/dialect/Dialect.java
index 7f0ca07a5..4d234c049 100644
--- a/hutool-db/src/main/java/cn/hutool/db/dialect/Dialect.java
+++ b/hutool-db/src/main/java/cn/hutool/db/dialect/Dialect.java
@@ -148,8 +148,10 @@ public interface Dialect extends Serializable {
 	 * @since 5.7.2
 	 */
 	default PreparedStatement psForCount(Connection conn, SqlBuilder sqlBuilder) throws SQLException {
+		// https://gitee.com/dromara/hutool/issues/I713XQ
+		// 为了兼容informix等数据库，此处使用count(*)而非count(1)
 		sqlBuilder = sqlBuilder
-				.insertPreFragment("SELECT count(1) from(")
+				.insertPreFragment("SELECT count(*) from(")
 				// issue#I3IJ8X@Gitee，在子查询时需设置单独别名，此处为了防止和用户的表名冲突，使用自定义的较长别名
 				.append(") hutool_alias_count_");
 		return psForPage(conn, sqlBuilder, null);