Package org.h2.table

Class InformationSchemaTable

java.lang.Object

org.h2.engine.DbObject

org.h2.schema.SchemaObject

org.h2.table.Table

org.h2.table.MetaTable

org.h2.table.InformationSchemaTable

All Implemented Interfaces:

HasSQL

public final class InformationSchemaTable
extends MetaTable

This class is responsible to build the INFORMATION_SCHEMA tables.

Field Summary

Fields

Modifier and Type	Field	Description
static final int	META_TABLE_TYPE_COUNT	The number of meta table types.

Fields inherited from class org.h2.table.MetaTable

indexColumn, metaIndex, ROW_COUNT_APPROXIMATION, type

Fields inherited from class org.h2.table.Table

columns, compareMode, EXCLUSIVE_LOCK, READ_LOCK, TYPE_CACHED, TYPE_MEMORY, WRITE_LOCK

Fields inherited from class org.h2.engine.DbObject

AGGREGATE, comment, COMMENT, CONSTANT, CONSTRAINT, database, DOMAIN, FUNCTION_ALIAS, INDEX, RIGHT, ROLE, SCHEMA, SEQUENCE, SETTING, SYNONYM, TABLE_OR_VIEW, trace, TRIGGER, USER

Fields inherited from interface org.h2.util.HasSQL

ADD_PLAN_INFORMATION, DEFAULT_SQL_FLAGS, NO_CASTS, QUOTE_ONLY_WHEN_REQUIRED, REPLACE_LOBS_FOR_TRACE, TRACE_SQL_FLAGS

Constructor Summary

Constructors

Constructor	Description
InformationSchemaTable(Schema schema, int id, int type)	Create a new metadata table.

Method Summary

Modifier and Type	Method	Description
boolean	canGetRowCount(SessionLocal session)	Check if the row count can be retrieved quickly.
ArrayList<Row>	generateRows(SessionLocal session, SearchRow first, SearchRow last)	Generate the data for the given metadata table using the given first and last row filters.
long	getMaxDataModificationId()	Get the last data modification id.
long	getRowCount(SessionLocal session)	Get the row count for this table.
long	getRowCountApproximation(SessionLocal session)	Get the approximated row count for this table.
boolean	isView()

Methods inherited from class org.h2.table.MetaTable

add, addIndex, addRow, canDrop, canReference, checkIndex, checkRename, checkSupportAlter, close, column, getAllConstraints, getAllTables, getCreateSQL, getIndexes, getScanIndex, getTableType, identifier, isDeterministic, isInsertable, removeChildrenAndResources, removeRow, setColumns, setMetaTableName, truncate

Methods inherited from class org.h2.table.Table

addConstraint, addDependencies, addDependentMaterializedView, addDependentView, addSequence, addSynonym, addTrigger, canTruncate, checkDeadlock, checkWritingAllowed, compareValues, convertInsertRow, convertUpdateRow, createRow, doesColumnExist, dropMultipleColumnsConstraintsAndIndexes, findColumn, findPrimaryKey, fire, fireAfterRow, fireBeforeRow, fireRow, getBestPlanItem, getCheckForeignKeyConstraints, getChildren, getColumn, getColumn, getColumn, getColumns, getCompareMode, getConstraints, getDependentMaterializedViews, getDependentViews, getDiskSpaceUsed, getIdentityColumn, getIndex, getIndexForColumn, getMainIndexColumn, getNullRow, getOnCommitDrop, getOnCommitTruncate, getPrimaryKey, getRow, getRowFactory, getRowIdColumn, getScanIndex, getSQLTableType, getTemplateRow, getTemplateSimpleRow, getTriggers, getType, getVisibleColumns, hasSelectTrigger, isGlobalTemporary, isLockedExclusively, isLockedExclusivelyBy, isPersistData, isPersistIndexes, isQueryComparable, isRowLockable, lock, lockRow, removeColumnExpressionsDependencies, removeConstraint, removeDependentMaterializedView, removeDependentView, removeIndex, removeIndexOrTransferOwnership, removeSequence, removeSynonym, removeTrigger, rename, renameColumn, setCheckForeignKeyConstraints, setOnCommitDrop, setOnCommitTruncate, unlock, updateRow, updateRows

Methods inherited from class org.h2.schema.SchemaObject

getSchema, getSQL, getSQL

Methods inherited from class org.h2.engine.DbObject

equals, getComment, getCreateSQLForCopy, getCreateSQLForMeta, getDatabase, getDropSQL, getId, getModificationId, getName, hashCode, invalidate, isTemporary, isValid, setComment, setModified, setObjectName, setTemporary, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.h2.util.HasSQL

getTraceSQL

Field Details

META_TABLE_TYPE_COUNT

public static final int META_TABLE_TYPE_COUNT

The number of meta table types. Supported meta table types are 0..META_TABLE_TYPE_COUNT - 1.

See Also:

• Constant Field Values

Constructor Details

InformationSchemaTable

public InformationSchemaTable(Schema schema,
 int id,
 int type)

Create a new metadata table.

Parameters:

schema - the schema

id - the object id

type - the meta table type

Method Details

generateRows

public ArrayList<Row> generateRows(SessionLocal session,
 SearchRow first,
 SearchRow last)

Description copied from class: MetaTable

Generate the data for the given metadata table using the given first and last row filters.

Specified by:

generateRows in class MetaTable

Parameters:

session - the session

first - the first row to return

last - the last row to return

Returns:

the generated rows

getMaxDataModificationId

public long getMaxDataModificationId()

Description copied from class: Table

Get the last data modification id.

Specified by:

getMaxDataModificationId in class Table

Returns:

the modification id

isView

public boolean isView()

Overrides:

isView in class Table

getRowCount

public long getRowCount(SessionLocal session)

Description copied from class: Table

Get the row count for this table.

Overrides:

getRowCount in class MetaTable

Parameters:

session - the session

Returns:

the row count

getRowCountApproximation

public long getRowCountApproximation(SessionLocal session)

Description copied from class: Table

Get the approximated row count for this table.

Overrides:

getRowCountApproximation in class MetaTable

Parameters:

session - the session

Returns:

the approximated row count

canGetRowCount

public boolean canGetRowCount(SessionLocal session)

Description copied from class: Table

Check if the row count can be retrieved quickly.

Overrides:

canGetRowCount in class MetaTable

Parameters:

session - the session

Returns:

true if it can