org.apache.calcite.schema.impl

Class ViewTable

java.lang.Object

org.apache.calcite.schema.impl.AbstractTable

org.apache.calcite.adapter.java.AbstractQueryableTable

org.apache.calcite.schema.impl.ViewTable

All Implemented Interfaces:

QueryableTable, Table, TranslatableTable, Wrapper

Direct Known Subclasses:

MaterializedViewTable, ModifiableViewTable

public class ViewTable
extends AbstractQueryableTable
implements TranslatableTable

Table whose contents are defined using an SQL statement.

It is not evaluated; it is expanded during query planning.

Field Summary

Fields

Modifier and Type	Field and Description
private RelProtoDataType	protoRowType
private List<String>	schemaPath
private List<String>	viewPath
private String	viewSql

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

elementType

Constructor Summary

Constructors

Constructor and Description
ViewTable(Type elementType, RelProtoDataType rowType, String viewSql, List<String> schemaPath, List<String> viewPath)

Method Summary

Modifier and Type	Method and Description
<T> Queryable<T>	asQueryable(QueryProvider queryProvider, SchemaPlus schema, String tableName) Converts this table into a Queryable.
private RelRoot	expandView(RelOptTable.ToRelContext preparingStmt, RelDataType rowType, String queryString)
Schema.TableType	getJdbcTableType() Type of table.
RelDataType	getRowType(RelDataTypeFactory typeFactory) Returns this table's row type.
List<String>	getSchemaPath() Returns the the schema path of the view.
List<String>	getViewPath() Returns the the path of the view.
String	getViewSql() Returns the view's SQL definition.
RelNode	toRel(RelOptTable.ToRelContext context, RelOptTable relOptTable) Converts this table into a relational expression.
static ViewTableMacro	viewMacro(SchemaPlus schema, String viewSql, List<String> schemaPath) Deprecated.
static ViewTableMacro	viewMacro(SchemaPlus schema, String viewSql, List<String> schemaPath, Boolean modifiable) Deprecated.
static ViewTableMacro	viewMacro(SchemaPlus schema, String viewSql, List<String> schemaPath, List<String> viewPath, Boolean modifiable) Table macro that returns a view.

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, unwrap

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

getStatistic, isRolledUp, rolledUpColumnValidInsideAgg

Field Detail

viewSql

private final String viewSql

schemaPath

private final List<String> schemaPath

protoRowType

private final RelProtoDataType protoRowType

viewPath

private final List<String> viewPath

Constructor Detail

ViewTable

public ViewTable(Type elementType,
                 RelProtoDataType rowType,
                 String viewSql,
                 List<String> schemaPath,
                 List<String> viewPath)

Method Detail

viewMacro

@Deprecated
public static ViewTableMacro viewMacro(SchemaPlus schema,
                                                   String viewSql,
                                                   List<String> schemaPath)

Deprecated.

viewMacro

@Deprecated
public static ViewTableMacro viewMacro(SchemaPlus schema,
                                                   String viewSql,
                                                   List<String> schemaPath,
                                                   Boolean modifiable)

Deprecated.

viewMacro

public static ViewTableMacro viewMacro(SchemaPlus schema,
                                       String viewSql,
                                       List<String> schemaPath,
                                       List<String> viewPath,
                                       Boolean modifiable)

Table macro that returns a view.

Parameters:

schema - Schema the view will belong to

viewSql - SQL query

schemaPath - Path of schema

modifiable - Whether view is modifiable, or null to deduce it

getViewSql

public String getViewSql()

Returns the view's SQL definition.

getSchemaPath

public List<String> getSchemaPath()

Returns the the schema path of the view.

getViewPath

public List<String> getViewPath()

Returns the the path of the view.

getJdbcTableType

public Schema.TableType getJdbcTableType()

Description copied from interface: Table

Type of table.

Specified by:

getJdbcTableType in interface Table

Overrides:

getJdbcTableType in class AbstractTable

getRowType

public RelDataType getRowType(RelDataTypeFactory typeFactory)

Description copied from interface: Table

Returns this table's row type.

This is a struct type whose fields describe the names and types of the columns in this table.

The implementer must use the type factory provided. This ensures that the type is converted into a canonical form; other equal types in the same query will use the same object.

Specified by:

getRowType in interface Table

Parameters:

typeFactory - Type factory with which to create the type

Returns:

Row type

asQueryable

public <T> Queryable<T> asQueryable(QueryProvider queryProvider,
                                    SchemaPlus schema,
                                    String tableName)

Description copied from interface: QueryableTable

Converts this table into a Queryable.

Specified by:

asQueryable in interface QueryableTable

toRel

public RelNode toRel(RelOptTable.ToRelContext context,
                     RelOptTable relOptTable)

Description copied from interface: TranslatableTable

Converts this table into a relational expression.

Specified by:

toRel in interface TranslatableTable

expandView

private RelRoot expandView(RelOptTable.ToRelContext preparingStmt,
                           RelDataType rowType,
                           String queryString)