From ccf4726ae0530695bd55903a989bbd6afae1dd5c Mon Sep 17 00:00:00 2001
From: Julien Lancelot <julien.lancelot@sonarsource.com>
Date: Fri, 10 Oct 2014 08:59:32 +0200
Subject: [PATCH] SONAR-5605 MySQL: configure driver to use server side cursor
 and not client side cursor

---
 .../java/org/sonar/server/db/migrations/SelectImpl.java    | 7 +------
 sonar-application/src/main/assembly/conf/sonar.properties  | 2 +-
 .../src/main/java/org/sonar/application/JdbcSettings.java  | 1 +
 .../test/java/org/sonar/application/JdbcSettingsTest.java  | 4 ++--
 4 files changed, 5 insertions(+), 9 deletions(-)

diff --git a/server/sonar-server/src/main/java/org/sonar/server/db/migrations/SelectImpl.java b/server/sonar-server/src/main/java/org/sonar/server/db/migrations/SelectImpl.java
index b49fc88edee..d0724aaa813 100644
--- a/server/sonar-server/src/main/java/org/sonar/server/db/migrations/SelectImpl.java
+++ b/server/sonar-server/src/main/java/org/sonar/server/db/migrations/SelectImpl.java
@@ -21,7 +21,6 @@ package org.sonar.server.db.migrations;
 
 import org.apache.commons.dbutils.DbUtils;
 import org.sonar.core.persistence.Database;
-import org.sonar.core.persistence.dialect.MySql;
 
 import java.sql.Connection;
 import java.sql.PreparedStatement;
@@ -83,11 +82,7 @@ class SelectImpl extends BaseSqlStatement<Select> implements Select {
 
   static SelectImpl create(Database db, Connection connection, String sql) throws SQLException {
     PreparedStatement pstmt = connection.prepareStatement(sql, ResultSet.TYPE_FORWARD_ONLY, ResultSet.CONCUR_READ_ONLY);
-    if (db.getDialect().getId().equals(MySql.ID)) {
-      pstmt.setFetchSize(Integer.MIN_VALUE);
-    } else {
-      pstmt.setFetchSize(1000);
-    }
+    pstmt.setFetchSize(1000);
     return new SelectImpl(pstmt);
   }
 }
diff --git a/sonar-application/src/main/assembly/conf/sonar.properties b/sonar-application/src/main/assembly/conf/sonar.properties
index e3477959f1b..0c70358e1c1 100644
--- a/sonar-application/src/main/assembly/conf/sonar.properties
+++ b/sonar-application/src/main/assembly/conf/sonar.properties
@@ -28,7 +28,7 @@
 
 
 #----- MySQL 5.x
-#sonar.jdbc.url=jdbc:mysql://localhost:3306/sonar?useUnicode=true&characterEncoding=utf8&rewriteBatchedStatements=true&useConfigs=maxPerformance
+#sonar.jdbc.url=jdbc:mysql://localhost:3306/sonar?useUnicode=true&characterEncoding=utf8&rewriteBatchedStatements=true&useConfigs=maxPerformance&useCursorFetch=true
 
 
 #----- Oracle 10g/11g
diff --git a/sonar-application/src/main/java/org/sonar/application/JdbcSettings.java b/sonar-application/src/main/java/org/sonar/application/JdbcSettings.java
index 20e32cacd02..2ce07111978 100644
--- a/sonar-application/src/main/java/org/sonar/application/JdbcSettings.java
+++ b/sonar-application/src/main/java/org/sonar/application/JdbcSettings.java
@@ -98,6 +98,7 @@ public class JdbcSettings {
     if (Provider.mysql.equals(provider)) {
       checkRequiredParameter(url, "useUnicode=true");
       checkRequiredParameter(url, "characterEncoding=utf8");
+      checkRequiredParameter(url, "useCursorFetch=true");
       checkRecommendedParameter(url, "rewriteBatchedStatements=true");
       checkRecommendedParameter(url, "useConfigs=maxPerformance");
     }
diff --git a/sonar-application/src/test/java/org/sonar/application/JdbcSettingsTest.java b/sonar-application/src/test/java/org/sonar/application/JdbcSettingsTest.java
index ad603c4e453..e1cdeffa94e 100644
--- a/sonar-application/src/test/java/org/sonar/application/JdbcSettingsTest.java
+++ b/sonar-application/src/test/java/org/sonar/application/JdbcSettingsTest.java
@@ -64,11 +64,11 @@ public class JdbcSettingsTest {
 
     // minimal -> ok
     settings.checkUrlParameters(JdbcSettings.Provider.mysql,
-      "jdbc:mysql://localhost:3306/sonar?useUnicode=true&characterEncoding=utf8");
+      "jdbc:mysql://localhost:3306/sonar?useUnicode=true&characterEncoding=utf8&useCursorFetch=true");
 
     // full -> ok
     settings.checkUrlParameters(JdbcSettings.Provider.mysql,
-      "jdbc:mysql://localhost:3306/sonar?useUnicode=true&characterEncoding=utf8&rewriteBatchedStatements=true&useConfigs=maxPerformance");
+      "jdbc:mysql://localhost:3306/sonar?useUnicode=true&characterEncoding=utf8&rewriteBatchedStatements=true&useConfigs=maxPerformance&useCursorFetch=true");
 
     // missing required -> ko
     try {
-- 
2.39.5