org.apache.calcite.adapter.clone

Class ArrayTable

java.lang.Object

org.apache.calcite.schema.impl.AbstractTable

org.apache.calcite.adapter.java.AbstractQueryableTable

org.apache.calcite.adapter.clone.ArrayTable

All Implemented Interfaces:

QueryableTable, ScannableTable, Table, Wrapper

class ArrayTable
extends AbstractQueryableTable
implements ScannableTable

Implementation of table that reads rows from column stores, one per column. Column store formats are chosen based on the type and distribution of the values in the column; see ArrayTable.Representation and ArrayTable.RepresentationType.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ArrayTable.BitSlicedPrimitiveArray Representation that stores numeric values in a bit-sliced array.
static class	ArrayTable.ByteStringDictionary Representation that stores byte-string column values.
static class	ArrayTable.Column Column definition and value set.
static class	ArrayTable.Constant Representation of a column that has the same value for every row.
static class	ArrayTable.Content Contents of a table.
static class	ArrayTable.ObjectArray Representation that stores the column values in an array.
static class	ArrayTable.ObjectDictionary Representation that stores the values of a column as a dictionary of objects.
static class	ArrayTable.PrimitiveArray Representation that stores the values of a column in an array of primitive values.
static class	ArrayTable.PrimitiveDictionary Representation that stores column values in a dictionary of primitive values, then uses a short code for each row.
static interface	ArrayTable.Representation Representation of the values of a column.
(package private) static class	ArrayTable.RepresentationType How a column's values are represented.
static class	ArrayTable.StringDictionary Representation that stores string column values.

Field Summary

Fields

Modifier and Type	Field and Description
private RelProtoDataType	protoRowType
private com.google.common.base.Supplier<ArrayTable.Content>	supplier

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

elementType

Constructor Summary

Constructors

Constructor and Description
ArrayTable(Type elementType, RelProtoDataType protoRowType, com.google.common.base.Supplier<ArrayTable.Content> supplier) Creates an ArrayTable.

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.
private static <E> List<E>	permuteList(List<E> list, int[] sources)
Enumerable<Object[]>	scan(DataContext root) Returns an enumerator over the rows in this Table.
private static <T> Pair<Object,T>	toPair(Object dataSet)

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

supplier

private final com.google.common.base.Supplier<ArrayTable.Content> supplier

Constructor Detail

ArrayTable

ArrayTable(Type elementType,
           RelProtoDataType protoRowType,
           com.google.common.base.Supplier<ArrayTable.Content> supplier)

Creates an ArrayTable.

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.

Specified by:

getRowType in interface Table

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

scan

public Enumerable<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

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

toPair

private static <T> Pair<Object,T> toPair(Object dataSet)

permuteList

private static <E> List<E> permuteList(List<E> list,
                                       int[] sources)