Class MetaRecord

java.lang.Object

org.h2.engine.MetaRecord

All Implemented Interfaces:

Comparable<MetaRecord>

public class MetaRecord
extends Object
implements Comparable<MetaRecord>

A record in the system table of the database. It contains the SQL statement to create the database object.

Field Summary

Fields

Modifier and Type	Field	Description
(package private) static final Comparator<Prepared>	CONSTRAINTS_COMPARATOR	Comparator for prepared constraints, sorts unique and primary key constraints first.
private final int	id
private final int	objectType
private final String	sql

Constructor Summary

Constructors

Constructor	Description
MetaRecord(SearchRow r)

Method Summary

Modifier and Type	Method	Description
int	compareTo(MetaRecord other)	Sort the list of meta records by 'create order'.
(package private) static void	execute(Database db, Prepared command, DatabaseEventListener listener, String sql)	Execute the meta data statement.
private int	getCreateOrder()	Get the sort order id for this object type.
int	getId()
int	getObjectType()
String	getSQL()
static void	populateRowFromDBObject(DbObject obj, SearchRow r)	Copy metadata from the specified object into specified search row.
(package private) Prepared	prepare(Database db, SessionLocal systemSession, DatabaseEventListener listener)	Prepares the meta data statement.
(package private) void	prepareAndExecute(Database db, SessionLocal systemSession, DatabaseEventListener listener)	Execute the meta data statement.
private static void	throwException(Database db, DatabaseEventListener listener, DbException e, String sql)
String	toString()

Methods inherited from class Object

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

Field Details

CONSTRAINTS_COMPARATOR

static final Comparator<Prepared> CONSTRAINTS_COMPARATOR

Comparator for prepared constraints, sorts unique and primary key constraints first.

id

private final int id

objectType

private final int objectType

sql

private final String sql

Constructor Details

MetaRecord

public MetaRecord(SearchRow r)

Method Details

populateRowFromDBObject

public static void populateRowFromDBObject(DbObject obj,
 SearchRow r)

Copy metadata from the specified object into specified search row.

Parameters:

obj - database object

r - search row

prepareAndExecute

void prepareAndExecute(Database db,
 SessionLocal systemSession,
 DatabaseEventListener listener)

Execute the meta data statement.

Parameters:

db - the database

systemSession - the system session

listener - the database event listener

prepare

Prepared prepare(Database db,
 SessionLocal systemSession,
 DatabaseEventListener listener)

Prepares the meta data statement.

Parameters:

db - the database

systemSession - the system session

listener - the database event listener

Returns:

the prepared command

execute

static void execute(Database db,
 Prepared command,
 DatabaseEventListener listener,
 String sql)

Execute the meta data statement.

Parameters:

db - the database

command - the prepared command

listener - the database event listener

sql - SQL

throwException

private static void throwException(Database db,
 DatabaseEventListener listener,
 DbException e,
 String sql)

getId

public int getId()

getObjectType

public int getObjectType()

getSQL

public String getSQL()

compareTo

public int compareTo(MetaRecord other)

Sort the list of meta records by 'create order'.

Specified by:

compareTo in interface Comparable<MetaRecord>

Parameters:

other - the other record

Returns:

-1, 0, or 1

getCreateOrder

private int getCreateOrder()

Get the sort order id for this object type. Objects are created in this order when opening a database.

Returns:

the sort index

toString

public String toString()

Overrides:

toString in class Object