org.opencms.db

Class CmsPagingQuery

java.lang.Object

org.opencms.db.CmsPagingQuery

All Implemented Interfaces:

I_CmsQueryFragment

public class CmsPagingQuery
extends java.lang.Object
implements I_CmsQueryFragment

Wrapper for CmsSelectQuery objects which adds SQL code for results paging.

The wrapper can either use the window function approach to paging or append a LIMIT/OFFSET clause.

Since:

8.0.0

See Also:

"http://troels.arvin.dk/db/rdbms/#select-limit-offset"

Constructor Summary

Constructors

Constructor and Description
CmsPagingQuery(CmsSelectQuery select) Creates a new instance.

Method Summary

Modifier and Type	Method and Description
void	setNameSubquery(boolean nameSubquery) Enables or disables the naming of subqueries.
void	setPaging(int pageSize, int page) Sets both the page size and current page to use for the query.
void	setUseWindowFunctions(boolean useWindowFunctions) Enables the use of window functions.
void	visit(CmsStatementBuilder builder) Generates the SQL and parameters and sends them to the statement builder .

Methods inherited from class java.lang.Object

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

Constructor Detail

CmsPagingQuery

public CmsPagingQuery(CmsSelectQuery select)

Creates a new instance.

Parameters:

select - the wrapped query

Method Detail

setNameSubquery

public void setNameSubquery(boolean nameSubquery)

Enables or disables the naming of subqueries.

Parameters:

nameSubquery - if true, enables naming of subqueries

setPaging

public void setPaging(int pageSize,
                      int page)

Sets both the page size and current page to use for the query.

Parameters:

pageSize - the page size

page - the current page (counting starts at 1)

setUseWindowFunctions

public void setUseWindowFunctions(boolean useWindowFunctions)

Enables the use of window functions.

Parameters:

useWindowFunctions - if true, enables window functions

visit

public void visit(CmsStatementBuilder builder)

Description copied from interface: I_CmsQueryFragment

Generates the SQL and parameters and sends them to the statement builder .

Specified by:

visit in interface I_CmsQueryFragment

Parameters:

builder - the statement builder

See Also:

I_CmsQueryFragment.visit(org.opencms.db.CmsStatementBuilder)