com.caucho.db.sql
Class ExistsQuery

java.lang.Object
  com.caucho.db.sql.Query
      com.caucho.db.sql.SelectQuery
          com.caucho.db.sql.ExistsQuery

public class ExistsQuery
extends SelectQuery

Field Summary

Fields inherited from class com.caucho.db.sql.Query

_whereExpr

Constructor Summary

protected

ExistsQuery(Database db, java.lang.String sql)

Method Summary

void	execute(QueryContext queryCtx, DbTransaction xa) Executes the query.
boolean	exists(QueryContext context, DbTransaction xa) Executes the query.

Methods inherited from class com.caucho.db.sql.SelectQuery

bind, executeCursor, isSelect, nextCursor, setGroupResult, setLimit, toString

Methods inherited from class com.caucho.db.sql.Query

bind, freeRows, generateWhere, getDatabase, getDataFields, getFromItems, getParamExprs, getParent, getSubSelect, getWhereExprs, isGroup, isReadOnly, nextTuple, setDataFields, setFromItems, setFromItems, setGroup, setParams, setParent, setSubSelect, setWhereExpr, setWhereExprs, start

Methods inherited from class java.lang.Object

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

Constructor Detail

ExistsQuery

protected ExistsQuery(Database db,
                      java.lang.String sql)
               throws java.sql.SQLException

Throws:

java.sql.SQLException

Method Detail

exists

public boolean exists(QueryContext context,
                      DbTransaction xa)
               throws java.sql.SQLException

Executes the query.

Throws:

java.sql.SQLException

execute

public void execute(QueryContext queryCtx,
                    DbTransaction xa)
             throws java.sql.SQLException

Executes the query.

Overrides:

execute in class SelectQuery

Throws:

java.sql.SQLException