Package org.h2.table

Class DerivedTable

java.lang.Object

org.h2.engine.DbObject

org.h2.schema.SchemaObject

org.h2.table.Table

org.h2.table.QueryExpressionTable

org.h2.table.DerivedTable

All Implemented Interfaces:

HasSQL

public final class DerivedTable
extends QueryExpressionTable

A derived table.

Field Summary

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
DerivedTable(SessionLocal session, String name, Column[] columnTemplates, Query query, Query topQuery)	Create a derived table out of the given query.

Method Summary

Modifier and Type	Method	Description
boolean	canDrop()	Check if this table can be dropped.
protected QueryExpressionIndex	createIndex(SessionLocal session, int[] masks)
String	getCreateSQL()	Construct the CREATE ...
QueryScope	getQueryScope()	Returns the scope of this table
StringBuilder	getSQL(StringBuilder builder, int sqlFlags)	Appends the SQL statement of this object to the specified builder.
TableType	getTableType()	Get the table type name
Query	getTopQuery()
boolean	isQueryComparable()	Check whether the table (or view) contains no columns that prevent index conditions to be used.

Methods inherited from class org.h2.table.QueryExpressionTable

addDependencies, addIndex, addRow, canGetRowCount, canReference, checkSupportAlter, close, createQueryColumnTemplateList, getBestPlanItem, getIndexes, getMaxDataModificationId, getParameterOffset, getQuery, getRowCount, getRowCountApproximation, getScanIndex, getScanIndex, isDeterministic, isInsertable, isView, removeRow, truncate

Methods inherited from class org.h2.table.Table

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

Methods inherited from class org.h2.schema.SchemaObject

getSchema, getSQL

Methods inherited from class org.h2.engine.DbObject

checkRename, 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

Constructor Details

DerivedTable

public DerivedTable(SessionLocal session,
 String name,
 Column[] columnTemplates,
 Query query,
 Query topQuery)

Create a derived table out of the given query.

Parameters:

session - the session

name - the view name

columnTemplates - column templates, or null

query - the initialized query

topQuery - the top level query

Method Details

createIndex

protected QueryExpressionIndex createIndex(SessionLocal session,
 int[] masks)

isQueryComparable

public boolean isQueryComparable()

Description copied from class: Table

Check whether the table (or view) contains no columns that prevent index conditions to be used. For example, a view that contains the ROWNUM() pseudo-column prevents this.

Overrides:

isQueryComparable in class QueryExpressionTable

Returns:

true if the table contains no query-comparable column

canDrop

public boolean canDrop()

Description copied from class: Table

Check if this table can be dropped.

Specified by:

canDrop in class Table

Returns:

true if it can

getTableType

public TableType getTableType()

Description copied from class: Table

Get the table type name

Specified by:

getTableType in class Table

Returns:

the table type name

getTopQuery

public Query getTopQuery()

Specified by:

getTopQuery in class QueryExpressionTable

getCreateSQL

public String getCreateSQL()

Description copied from class: DbObject

Construct the CREATE ... SQL statement for this object.

Specified by:

getCreateSQL in class DbObject

Returns:

the SQL statement

getSQL

public StringBuilder getSQL(StringBuilder builder,
 int sqlFlags)

Description copied from interface: HasSQL

Appends the SQL statement of this object to the specified builder.

Specified by:

getSQL in interface HasSQL

Overrides:

getSQL in class SchemaObject

Parameters:

builder - string builder

sqlFlags - formatting flags

Returns:

the specified string builder

getQueryScope

public QueryScope getQueryScope()

Description copied from class: QueryExpressionTable

Returns the scope of this table

Specified by:

getQueryScope in class QueryExpressionTable

Returns:

the scope of this table