Package org.apache.calcite.schema.impl

Class ListTransientTable

java.lang.Object

org.apache.calcite.schema.impl.AbstractTable

org.apache.calcite.adapter.java.AbstractQueryableTable

org.apache.calcite.schema.impl.ListTransientTable

All Implemented Interfaces:

ModifiableTable, QueryableTable, ScannableTable, Table, TransientTable, Wrapper

public class ListTransientTable
extends AbstractQueryableTable
implements TransientTable, ModifiableTable, ScannableTable

TransientTable backed by a Java list. It will be automatically added to the current schema when scan(DataContext) method gets called.

NOTE: The current API is experimental and subject to change without notice.

Field Summary

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

elementType

Constructor Summary

Constructors

Constructor	Description
ListTransientTable(String name, RelDataType rowType)

Method Summary

Modifier and Type	Method	Description
<T> Queryable<T>	asQueryable(QueryProvider queryProvider, SchemaPlus schema, String tableName)	Converts this table into a Queryable.
Type	getElementType()	Returns the element type of the collection that will implement this table.
Expression	getExpression(SchemaPlus schema, String tableName, Class clazz)	Generates an expression with which this table can be referenced in generated code.
Collection	getModifiableCollection()	Returns the modifiable collection.
RelDataType	getRowType(RelDataTypeFactory typeFactory)	Returns this table's row type.
Enumerable<@Nullable Object[]>	scan(DataContext root)	Returns an enumerator over the rows in this Table.
TableModify	toModificationRel(RelOptCluster cluster, RelOptTable table, Prepare.CatalogReader catalogReader, RelNode child, TableModify.Operation operation, @Nullable List<String> updateColumnList, @Nullable List<RexNode> sourceExpressionList, boolean flattened)	Creates a relational expression that modifies this table.

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

getJdbcTableType, 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

getJdbcTableType, getStatistic, isRolledUp, rolledUpColumnValidInsideAgg

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

maybeUnwrap, unwrapOrThrow

Constructor Details

ListTransientTable

public ListTransientTable(String name,
 RelDataType rowType)

Method Details

toModificationRel

public TableModify toModificationRel(RelOptCluster cluster,
 RelOptTable table,
 Prepare.CatalogReader catalogReader,
 RelNode child,
 TableModify.Operation operation,
 @Nullable List<String> updateColumnList,
 @Nullable List<RexNode> sourceExpressionList,
 boolean flattened)

Description copied from interface: ModifiableTable

Creates a relational expression that modifies this table.

Specified by:

toModificationRel in interface ModifiableTable

getModifiableCollection

public Collection getModifiableCollection()

Description copied from interface: ModifiableTable

Returns the modifiable collection. Modifying the collection will change the table's contents.

Specified by:

getModifiableCollection in interface ModifiableTable

scan

public Enumerable<@Nullable Object[]> scan(DataContext root)

Description copied from interface: ScannableTable

Returns an enumerator over the rows in this Table. Each row is represented as an array of its column values.

Specified by:

scan in interface ScannableTable

getExpression

public Expression getExpression(SchemaPlus schema,
 String tableName,
 Class clazz)

Description copied from interface: QueryableTable

Generates an expression with which this table can be referenced in generated code.

Specified by:

getExpression in interface QueryableTable

Overrides:

getExpression in class AbstractQueryableTable

Parameters:

schema - Schema

tableName - Table name (unique within schema)

clazz - The desired collection class; for example Queryable.

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

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

getElementType

public Type getElementType()

Description copied from interface: QueryableTable

Returns the element type of the collection that will implement this table.

Specified by:

getElementType in interface QueryableTable

Overrides:

getElementType in class AbstractQueryableTable