Module org.seasar.doma.core

Package org.seasar.doma.jdbc.query

Class CountQuery

java.lang.Object

org.seasar.doma.jdbc.query.AbstractQuery

org.seasar.doma.jdbc.query.AbstractSelectQuery

org.seasar.doma.jdbc.query.CountQuery

All Implemented Interfaces:

Query, SelectQuery

public class CountQuery
extends AbstractSelectQuery

A query that counts the number of rows that would be returned by a SELECT statement.

This class extends AbstractSelectQuery to provide functionality for transforming a SELECT query into a COUNT query. It uses the database dialect to transform the SQL node for counting.

Field Summary

Fields

Modifier and Type	Field	Description
protected SqlNode	sqlNode	The SQL node representing the original SELECT query.

Fields inherited from class org.seasar.doma.jdbc.query.AbstractSelectQuery

aggregateStrategyType, entityType, fetchSize, fetchType, maxRows, options, parameters, resultEnsured, resultMappingEnsured, resultStream, sql, sqlLogType

Fields inherited from class org.seasar.doma.jdbc.query.AbstractQuery

callerClassName, callerMethodName, config, message, method, queryTimeout

Constructor Summary

Constructors

Constructor	Description
CountQuery()

Method Summary

Modifier and Type	Method	Description
void	complete()	Completes this query after execution.
FetchType	getFetchType()	Returns the fetch type for this query.
boolean	isResultEnsured()	Returns whether the query is expected to return at least one result.
boolean	isResultMappingEnsured()	Returns whether the result mapping is ensured.
void	prepare()	Prepares this query for execution.
protected void	prepareSql()	Prepares the SQL for this query.
void	setSqlNode(SqlNode sqlNode)	Sets the SQL node representing the original SELECT query.

Methods inherited from class org.seasar.doma.jdbc.query.AbstractSelectQuery

addParameter, addParameters, buildSql, clearParameters, createExpressionEvaluator, executeCount, expandAggregateColumns, expandColumns, getFetchSize, getMaxRows, getOptions, getSql, getSqlLogType, isResultStream, populateValues, prepareOptions, setAggregateStrategyType, setEntityType, setFetchSize, setFetchType, setMaxRows, setOptions, setResultEnsured, setResultMappingEnsured, setResultStream, setSqlLogType, toString

Methods inherited from class org.seasar.doma.jdbc.query.AbstractQuery

comment, getClassName, getConfig, getMethod, getMethodName, getQueryTimeout, setCallerClassName, setCallerMethodName, setConfig, setMessage, setMethod, setQueryTimeout

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.seasar.doma.jdbc.query.Query

comment, getClassName, getConfig, getMethod, getMethodName, getQueryTimeout

Field Details

sqlNode

protected SqlNode sqlNode

The SQL node representing the original SELECT query.

Constructor Details

CountQuery

public CountQuery()

Method Details

isResultEnsured

public boolean isResultEnsured()

Returns whether the query is expected to return at least one result.

Specified by:

isResultEnsured in interface SelectQuery

Overrides:

isResultEnsured in class AbstractSelectQuery

Returns:

true if the query is expected to return at least one result

isResultMappingEnsured

public boolean isResultMappingEnsured()

Returns whether the result mapping is ensured.

Specified by:

isResultMappingEnsured in interface SelectQuery

Overrides:

isResultMappingEnsured in class AbstractSelectQuery

Returns:

true if the result mapping is ensured

getFetchType

public FetchType getFetchType()

Returns the fetch type for this query.

Specified by:

getFetchType in interface SelectQuery

Overrides:

getFetchType in class AbstractSelectQuery

Returns:

the fetch type

prepare

public void prepare()

Prepares this query for execution. This method must be called before the query is executed.

This implementation prepares options and SQL.

Specified by:

prepare in interface Query

Overrides:

prepare in class AbstractSelectQuery

prepareSql

protected void prepareSql()

Prepares the SQL for this query.

This method must be implemented by subclasses to build the SQL statement.

Specified by:

prepareSql in class AbstractSelectQuery

complete

public void complete()

Completes this query after execution. This method must be called after the query is executed.

setSqlNode

public void setSqlNode(SqlNode sqlNode)

Sets the SQL node representing the original SELECT query.

Parameters:

sqlNode - the SQL node