org.jooq.impl.QuantifiedSelectImpl Maven / Gradle / Ivy
/**
* Copyright (c) 2009-2014, Data Geekery GmbH (http://www.datageekery.com)
* All rights reserved.
*
* This work is dual-licensed
* - under the Apache Software License 2.0 (the "ASL")
* - under the jOOQ License and Maintenance Agreement (the "jOOQ License")
* =============================================================================
* You may choose which license applies to you:
*
* - If you're using this work with Open Source databases, you may choose
* either ASL or jOOQ License.
* - If you're using this work with at least one commercial database, you must
* choose jOOQ License
*
* For more information, please visit http://www.jooq.org/licenses
*
* Apache Software License 2.0:
* -----------------------------------------------------------------------------
* Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
*
* 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.
*
* jOOQ License and Maintenance Agreement:
* -----------------------------------------------------------------------------
* Data Geekery grants the Customer the non-exclusive, timely limited and
* non-transferable license to install and use the Software under the terms of
* the jOOQ License and Maintenance Agreement.
*
* This library is distributed with a LIMITED WARRANTY. See the jOOQ License
* and Maintenance Agreement for more details: http://www.jooq.org/licensing
*/
package org.jooq.impl;
import static org.jooq.impl.DSL.select;
import static org.jooq.impl.DSL.table;
import static org.jooq.impl.DSL.val;
import org.jooq.Clause;
import org.jooq.Configuration;
import org.jooq.Context;
import org.jooq.Field;
import org.jooq.Param;
import org.jooq.QuantifiedSelect;
import org.jooq.QueryPartInternal;
import org.jooq.Record;
import org.jooq.Record1;
import org.jooq.Select;
/**
* @author Lukas Eder
*/
class QuantifiedSelectImpl extends AbstractQueryPart implements QuantifiedSelect {
/**
* Generated UID
*/
private static final long serialVersionUID = -1224570388944748450L;
private final Quantifier quantifier;
private final Select query;
private final Field array;
QuantifiedSelectImpl(Quantifier quantifier, Select query) {
this.quantifier = quantifier;
this.query = query;
this.array = null;
}
QuantifiedSelectImpl(Quantifier quantifier, Field array) {
this.quantifier = quantifier;
this.query = null;
this.array = array;
}
@Override
public final void accept(Context ctx) {
// If this is already a subquery, proceed
if (ctx.subquery()) {
ctx.keyword(quantifier.toSQL())
.sql(" (")
.formatIndentStart()
.formatNewLine()
.visit(delegate(ctx.configuration()))
.formatIndentEnd()
.formatNewLine()
.sql(")");
}
else {
ctx.keyword(quantifier.toSQL())
.sql(" (")
.subquery(true)
.formatIndentStart()
.formatNewLine()
.visit(delegate(ctx.configuration()))
.formatIndentEnd()
.formatNewLine()
.subquery(false)
.sql(")");
}
}
@Override
public final Clause[] clauses(Context ctx) {
return delegate(ctx.configuration()).clauses(ctx);
}
private final QueryPartInternal delegate(Configuration ctx) {
if (query != null) {
return (QueryPartInternal) query;
}
else {
switch (ctx.dialect()) {
// [#869] Postgres supports this syntax natively
case POSTGRES: {
return (QueryPartInternal) array;
}
// [#869] H2 and HSQLDB can simulate this syntax by unnesting
// the array in a subselect
case H2:
case HSQLDB:
return (QueryPartInternal) create(ctx).select().from(table(array));
// [#1048] All other dialects simulate unnesting of arrays using
// UNION ALL-connected subselects
default: {
// The Informix database has an interesting bug when quantified comparison predicates
// use nested derived tables with UNION ALL
if (array instanceof Param) {
Object[] values = ((Param) array).getValue();
Select> select = null;
for (Object value : values) {
if (select == null)
select = select(val(value));
else
select = select.unionAll(select(val(value)));
}
return (QueryPartInternal) select;
}
else {
return (QueryPartInternal) select().from(table(array));
}
}
}
}
}
}