org.h2.command.dml
Class Explain

java.lang.Object
  extended by org.h2.command.Prepared
      extended by org.h2.command.dml.Explain

public class Explain
extends Prepared

This class represents the statement EXPLAIN


Field Summary
 
Fields inherited from class org.h2.command.Prepared
create, parameters, prepareAlways, session, sqlStatement
 
Constructor Summary
Explain(Session session)
           
 
Method Summary
 int getType()
          Get the command type as defined in CommandInterface
 boolean isQuery()
          Check if this object is a query.
 boolean isReadOnly()
          Check if this command is read only.
 boolean isTransactional()
          Check if this command is transactional.
 void prepare()
          Prepare this statement.
 ResultInterface query(int maxrows)
          Execute the query.
 ResultInterface queryMeta()
          Get an empty result set containing the meta data.
 void setCommand(Prepared command)
           
 void setExecuteCommand(boolean executeCommand)
           
 
Methods inherited from class org.h2.command.Prepared
checkCanceled, checkParameters, getCurrentObjectId, getCurrentRowNumber, getObjectId, getParameters, getPlanSQL, getSQL, getSQL, getSQL, isCacheable, needRecompile, setCommand, setCurrentRowNumber, setObjectId, setParameterList, setPrepareAlways, setRow, setSession, setSQL, toString, update
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

Explain

public Explain(Session session)
Method Detail

setCommand

public void setCommand(Prepared command)

prepare

public void prepare()
Description copied from class: Prepared
Prepare this statement.

Overrides:
prepare in class Prepared

setExecuteCommand

public void setExecuteCommand(boolean executeCommand)

queryMeta

public ResultInterface queryMeta()
Description copied from class: Prepared
Get an empty result set containing the meta data.

Specified by:
queryMeta in class Prepared
Returns:
the result set

query

public ResultInterface query(int maxrows)
Description copied from class: Prepared
Execute the query.

Overrides:
query in class Prepared
Parameters:
maxrows - the maximum number of rows to return
Returns:
the result set

isQuery

public boolean isQuery()
Description copied from class: Prepared
Check if this object is a query.

Overrides:
isQuery in class Prepared
Returns:
true if it is

isTransactional

public boolean isTransactional()
Description copied from class: Prepared
Check if this command is transactional. If it is not, then it forces the current transaction to commit.

Specified by:
isTransactional in class Prepared
Returns:
true if it is

isReadOnly

public boolean isReadOnly()
Description copied from class: Prepared
Check if this command is read only.

Overrides:
isReadOnly in class Prepared
Returns:
true if it is

getType

public int getType()
Description copied from class: Prepared
Get the command type as defined in CommandInterface

Specified by:
getType in class Prepared
Returns:
the statement type