org.apache.calcite.schema.impl

Class ModifiableViewTable

java.lang.Object

org.apache.calcite.schema.impl.AbstractTable

org.apache.calcite.adapter.java.AbstractQueryableTable

org.apache.calcite.schema.impl.ViewTable

org.apache.calcite.schema.impl.ModifiableViewTable

All Implemented Interfaces:

ModifiableView, QueryableTable, Table, TranslatableTable, Wrapper

public class ModifiableViewTable
extends ViewTable
implements ModifiableView, Wrapper

Extension to ViewTable that is modifiable.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private class	ModifiableViewTable.ModifiableViewTableInitializerExpressionFactory Initializes columns based on the view constraint.

Field Summary

Fields

Modifier and Type	Field and Description
private ImmutableIntList	columnMapping
private RexNode	constraint
private InitializerExpressionFactory	initializerExpressionFactory
private Table	table
private Path	tablePath

Fields inherited from class org.apache.calcite.adapter.java.AbstractQueryableTable

elementType

Constructor Summary

Constructors

Constructor and Description
ModifiableViewTable(Type elementType, RelProtoDataType rowType, String viewSql, List<String> schemaPath, List<String> viewPath, Table table, Path tablePath, RexNode constraint, ImmutableIntList columnMapping) Creates a ModifiableViewTable.

Method Summary

Modifier and Type	Method and Description
ModifiableViewTable	extend(List<RelDataTypeField> extendedColumns, RelDataTypeFactory typeFactory) Extends the underlying table and returns a new view with updated row-type and column-mapping.
protected ModifiableViewTable	extend(Table extendedTable, RelProtoDataType protoRowType, ImmutableIntList newColumnMapping)
ImmutableIntList	getColumnMapping() Returns the column mapping onto another table.
RexNode	getConstraint(RexBuilder rexBuilder, RelDataType tableRowType) Returns a constraint that each candidate row must satisfy.
private static ImmutableIntList	getNewColumnMapping(Table underlying, ImmutableIntList oldColumnMapping, List<RelDataTypeField> extendedColumns, RelDataTypeFactory typeFactory) Creates a mapping from the view index to the index in the underlying table.
Table	getTable() Returns the underlying table.
Path	getTablePath() Returns the full path of the underlying table.
<C> C	unwrap(Class<C> aClass) Finds an instance of an interface implemented by this object, or returns null if this object does not support that interface.

Methods inherited from class org.apache.calcite.schema.impl.ViewTable

asQueryable, getJdbcTableType, getRowType, getSchemaPath, getViewPath, getViewSql, toRel, viewMacro, viewMacro, viewMacro

Methods inherited from class org.apache.calcite.adapter.java.AbstractQueryableTable

getElementType, getExpression

Methods inherited from class org.apache.calcite.schema.impl.AbstractTable

getStatistic, isRolledUp, rolledUpColumnValidInsideAgg

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.calcite.schema.Table

getJdbcTableType, getRowType, getStatistic, isRolledUp, rolledUpColumnValidInsideAgg

Field Detail

table

private final Table table

tablePath

private final Path tablePath

constraint

private final RexNode constraint

columnMapping

private final ImmutableIntList columnMapping

initializerExpressionFactory

private final InitializerExpressionFactory initializerExpressionFactory

Constructor Detail

ModifiableViewTable

public ModifiableViewTable(Type elementType,
                           RelProtoDataType rowType,
                           String viewSql,
                           List<String> schemaPath,
                           List<String> viewPath,
                           Table table,
                           Path tablePath,
                           RexNode constraint,
                           ImmutableIntList columnMapping)

Creates a ModifiableViewTable.

Method Detail

getConstraint

public RexNode getConstraint(RexBuilder rexBuilder,
                             RelDataType tableRowType)

Description copied from interface: ModifiableView

Returns a constraint that each candidate row must satisfy.

Never null; if there is no constraint, returns "true".

Specified by:

getConstraint in interface ModifiableView

Parameters:

rexBuilder - Rex builder

tableRowType - Row type of the table that this view maps onto

getColumnMapping

public ImmutableIntList getColumnMapping()

Description copied from interface: ModifiableView

Returns the column mapping onto another table.

mapping[i] contains the column of the underlying table that the ith column of the view comes from, or -1 if it is based on an expression.

Specified by:

getColumnMapping in interface ModifiableView

getTable

public Table getTable()

Description copied from interface: ModifiableView

Returns the underlying table.

Specified by:

getTable in interface ModifiableView

getTablePath

public Path getTablePath()

Description copied from interface: ModifiableView

Returns the full path of the underlying table.

Specified by:

getTablePath in interface ModifiableView

unwrap

public <C> C unwrap(Class<C> aClass)

Description copied from interface: Wrapper

Finds an instance of an interface implemented by this object, or returns null if this object does not support that interface.

Specified by:

unwrap in interface Wrapper

Overrides:

unwrap in class AbstractTable

extend

public final ModifiableViewTable extend(List<RelDataTypeField> extendedColumns,
                                        RelDataTypeFactory typeFactory)

Extends the underlying table and returns a new view with updated row-type and column-mapping.

The type factory is used to perform some scratch calculations, viz the type mapping, but the "real" row-type will be assigned later, when the table has been bound to the statement's type factory. The is important, because adding types to type factories that do not belong to a statement could potentially leak memory.

Parameters:

extendedColumns - Extended fields

typeFactory - Type factory

getNewColumnMapping

private static ImmutableIntList getNewColumnMapping(Table underlying,
                                                    ImmutableIntList oldColumnMapping,
                                                    List<RelDataTypeField> extendedColumns,
                                                    RelDataTypeFactory typeFactory)

Creates a mapping from the view index to the index in the underlying table.

extend

protected ModifiableViewTable extend(Table extendedTable,
                                     RelProtoDataType protoRowType,
                                     ImmutableIntList newColumnMapping)