org.apache.calcite.adapter.clone

Class ListTable

java.lang.Object

org.apache.calcite.schema.impl.AbstractTable

org.apache.calcite.adapter.java.AbstractQueryableTable

org.apache.calcite.adapter.clone.ListTable

All Implemented Interfaces:

QueryableTable, Table, Wrapper

class ListTable
extends AbstractQueryableTable

Implementation of table that reads rows from a read-only list and returns an enumerator of rows. Each row is object (if there is just one column) or an object array (if there are multiple columns).

Field Summary

Fields

Modifier and Type	Field and Description
private Expression	expression
private List	list
private RelProtoDataType	protoRowType

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

elementType

Constructor Summary

Constructors

Constructor and Description
ListTable(Type elementType, RelProtoDataType protoRowType, Expression expression, List list) Creates a ListTable.

Method Summary

Modifier and Type	Method and Description
<T> Queryable<T>	asQueryable(QueryProvider queryProvider, SchemaPlus schema, String tableName) Converts this table into a Queryable.
RelDataType	getRowType(RelDataTypeFactory typeFactory) Returns this table's row type.
Statistic	getStatistic() Returns a provider of statistics about this table.

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

getElementType, getExpression

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

getJdbcTableType, 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

getJdbcTableType, isRolledUp, rolledUpColumnValidInsideAgg

Field Detail

protoRowType

private final RelProtoDataType protoRowType

expression

private final Expression expression

list

private final List list

Constructor Detail

ListTable

ListTable(Type elementType,
          RelProtoDataType protoRowType,
          Expression expression,
          List list)

Creates a ListTable.

Method Detail

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.

Parameters:

typeFactory - Type factory with which to create the type

Returns:

Row type

getStatistic

public Statistic getStatistic()

Description copied from interface: Table

Returns a provider of statistics about this table.

Specified by:

getStatistic in interface Table

Overrides:

getStatistic in class AbstractTable

asQueryable

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

Description copied from interface: QueryableTable

Converts this table into a Queryable.