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Adapt H2PagingQueryProvider for H2 v2.x

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Issue #4047
This commit is contained in:
Henning Poettker
2022-01-17 23:30:32 +01:00
committed by Mahmoud Ben Hassine
parent baf80a7739
commit d23d4f9dde
4 changed files with 130 additions and 21 deletions
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17
spring-batch-infrastructure/src/main/java/org/springframework/batch/item/database/support/H2PagingQueryProvider.java
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@@ -1,5 +1,5 @@
/*
* Copyright 2006-2008 the original author or authors.
* Copyright 2006-2022 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -20,22 +20,23 @@ package org.springframework.batch.item.database.support;
* H2 implementation of a {@link org.springframework.batch.item.database.PagingQueryProvider} using database specific features.
*
* @author Dave Syer
* @author Henning Pöttker
* @since 2.1
*/
public class H2PagingQueryProvider extends AbstractSqlPagingQueryProvider {
@Override
public String generateFirstPageQuery(int pageSize) {
return SqlPagingQueryUtils.generateTopSqlQuery(this, false, buildTopClause(pageSize));
return SqlPagingQueryUtils.generateLimitSqlQuery(this, false, buildLimitClause(pageSize));
}
@Override
public String generateRemainingPagesQuery(int pageSize) {
return SqlPagingQueryUtils.generateTopSqlQuery(this, true, buildTopClause(pageSize));
return SqlPagingQueryUtils.generateLimitSqlQuery(this, true, buildLimitClause(pageSize));
}
private String buildTopClause(int pageSize) {
return new StringBuilder().append("TOP ").append(pageSize).toString();
private String buildLimitClause(int pageSize) {
return new StringBuilder().append("FETCH NEXT ").append(pageSize).append(" ROWS ONLY").toString();
}
@Override
@@ -44,8 +45,10 @@ public class H2PagingQueryProvider extends AbstractSqlPagingQueryProvider {
int offset = (page * pageSize) - 1;
offset = offset<0 ? 0 : offset;
String topClause = new StringBuilder().append("LIMIT ").append(offset).append(" 1").toString();
return SqlPagingQueryUtils.generateTopJumpToQuery(this, topClause);
String limitClause = new StringBuilder().append("OFFSET ")
.append(offset).append(" ROWS FETCH NEXT 1 ROWS ONLY")
.toString();
return SqlPagingQueryUtils.generateLimitJumpToQuery(this, limitClause);
}
}