org.jooq.Select Maven / Gradle / Ivy
/*
* 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
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* http://www.apache.org/licenses/LICENSE-2.0
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* distributed under the License is distributed on an "AS IS" BASIS,
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*
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* -----------------------------------------------------------------------------
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* database integrations.
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package org.jooq;
// ...
import static org.jooq.SQLDialect.CUBRID;
// ...
import static org.jooq.SQLDialect.DERBY;
import static org.jooq.SQLDialect.H2;
// ...
import static org.jooq.SQLDialect.HSQLDB;
// ...
// ...
import static org.jooq.SQLDialect.MARIADB;
import static org.jooq.SQLDialect.MYSQL;
// ...
import static org.jooq.SQLDialect.POSTGRES;
import static org.jooq.SQLDialect.SQLITE;
// ...
// ...
// ...
import java.util.List;
import org.jooq.exception.DataAccessException;
/**
* A {@link Query} that can provide a {@link Result} after execution
*
* @param The record type being returned by this query
* @author Lukas Eder
*/
public interface Select extends ResultQuery, TableLike, FieldLike {
/**
* Apply the UNION set operation.
*/
@Support
Select union(Select select);
/**
* Apply the UNION ALL set operation.
*/
@Support
Select unionAll(Select select);
/**
* Apply the EXCEPT (or MINUS) set operation.
*/
@Support({ CUBRID, DERBY, H2, HSQLDB, MARIADB, MYSQL, POSTGRES, SQLITE })
Select except(Select select);
/**
* Apply the EXCEPT ALL set operation.
*/
@Support({ CUBRID, DERBY, HSQLDB, POSTGRES })
Select exceptAll(Select select);
/**
* Apply the INTERSECT set operation.
*/
@Support({ CUBRID, DERBY, H2, HSQLDB, MARIADB, MYSQL, POSTGRES, SQLITE })
Select intersect(Select select);
/**
* Apply the INTERSECT ALL set operation.
*/
@Support({ CUBRID, DERBY, HSQLDB, POSTGRES })
Select intersectAll(Select select);
/**
* All fields selected in this query
*/
List> getSelect();
/**
* Execute this query in the context of its attached executor and return a
* COUNT(*) value.
*
* This wraps a pre-existing SELECT query in another one to
* calculate the COUNT(*) value, without modifying the original
* SELECT. An example:
* -- Original query:
* SELECT id, title FROM book WHERE title LIKE '%a%'
*
* -- Wrapped query:
* SELECT count(*) FROM (
* SELECT id, title FROM book WHERE title LIKE '%a%'
* )
* COUNT(*) OVER() window function to calculate
* total results in paged queries.
*
* @return The COUNT(*) result
* @throws DataAccessException if something went wrong executing the query
* @deprecated - 3.5.0 - [#3356] - This method is being removed as it is
* confusingly different from all the other types of
* {@link #fetch()} methods, in that it modifies the original
* {@link Select} statement by wrapping it. In particular, this
* method can be easily confused with {@link #fetch(Field)}, or
* more concretely fetch(count()), which has an
* entirely different semantics. Use
* {@link DSLContext#fetchCount(Select)} instead.
*/
@Deprecated
int fetchCount() throws DataAccessException;
}