com.jn.sqlhelper.dialect.internal.InformixDialect Maven / Gradle / Ivy
/*
* Copyright 2019 the original author or authors.
*
* Licensed under the LGPL, Version 3.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at http://www.gnu.org/licenses/lgpl-3.0.html
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.jn.sqlhelper.dialect.internal;
import com.jn.langx.annotation.Name;
import com.jn.sqlhelper.dialect.annotation.Driver;
import com.jn.sqlhelper.dialect.internal.limit.LimitOnlyLimitHandler;
import com.jn.sqlhelper.dialect.internal.limit.SkipLimitHandler;
import com.jn.sqlhelper.dialect.internal.urlparser.InformixUrlParser;
/**
* https://www.ibm.com/support/knowledgecenter/en/SSGU8G_11.50.0/com.ibm.sqls.doc/ids_sqs_0987.htm
*/
@Name("informix")
@Driver("com.informix.jdbc.IfxDriver")
public class InformixDialect extends AbstractDialect {
public InformixDialect() {
super();
setDelegate(new Informix10Dialect());
setUrlParser(new InformixUrlParser());
}
public InformixDialect(java.sql.Driver driver) {
super();
if (driver.getMajorVersion() >= 4) {
setDelegate(new Informix10Dialect());
} else {
setDelegate(new Informix9Dialect());
}
setUrlParser(new InformixUrlParser());
}
@Override
public boolean isSupportsLimit() {
return getRealDialect().isSupportsLimit();
}
@Override
public boolean isUseMaxForLimit() {
return getRealDialect().isUseMaxForLimit();
}
@Override
public boolean isSupportsLimitOffset() {
return getRealDialect().isSupportsLimitOffset();
}
@Override
public boolean isSupportsVariableLimit() {
return getRealDialect().isSupportsVariableLimit();
}
static class Informix9Dialect extends AbstractDialect {
public Informix9Dialect() {
super();
this.setLimitHandler(new LimitOnlyLimitHandler());
}
@Override
public boolean isSupportsLimit() {
return true;
}
@Override
public boolean isUseMaxForLimit() {
return true;
}
@Override
public boolean isSupportsLimitOffset() {
return false;
}
@Override
public boolean isSupportsVariableLimit() {
return false;
}
@Override
public boolean isBindLimitParametersFirst() {
return true;
}
}
static class Informix10Dialect extends AbstractDialect {
public Informix10Dialect() {
super();
this.setLimitHandler(new SkipLimitHandler());
}
@Override
public boolean isSupportsLimit() {
return true;
}
@Override
public boolean isSupportsLimitOffset() {
return true;
}
@Override
public boolean isSupportsVariableLimit() {
return false;
}
@Override
public boolean isBindLimitParametersFirst() {
return true;
}
}
}