Package io.deephaven.qst.table

Class MergeTable

java.lang.Object

io.deephaven.qst.table.TableBase

io.deephaven.qst.table.MergeTable

All Implemented Interfaces:

TableOperations<TableSpec,TableSpec>, TableOperationsDefaults<TableSpec,TableSpec>, TableSchema, TableSpec

@Immutable
public abstract class MergeTable
extends TableBase

Concatenates multiple tables into a single table.

The resultant table will have rows from the same table together, in the order they are specified as inputs.

When ticking tables grow, they may run out of the 'pre-allocated' space for newly added rows. When more key- space is needed, tables in higher key-space are shifted to yet higher key-space to make room for new rows. Shifts are handled efficiently, but some downstream operations generate a linear O(n) amount of work per shifted row. When possible, one should favor ordering the constituent tables first by static/non-ticking sources followed by tables that are expected to grow at slower rates, and finally by tables that grow without bound.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	MergeTable.Builder

Nested classes/interfaces inherited from interface io.deephaven.qst.table.TableSpec

TableSpec.Visitor<T>

Field Summary

Fields inherited from interface io.deephaven.api.TableOperations

AGG_BY_PRESERVE_EMPTY_DEFAULT

Fields inherited from interface io.deephaven.api.TableOperationsDefaults

ZERO_LENGTH_COLUMNNAME_ARRAY, ZERO_LENGTH_FILTER_ARRAY

Constructor Summary

Constructors

Constructor	Description
MergeTable()

Method Summary

Modifier and Type	Method	Description
static MergeTable.Builder	builder()
static MergeTable	of(TableSpec... tables)
static MergeTable	of(Iterable<? extends TableSpec> tables)
abstract List<TableSpec>	tables()
final <T> T	walk(TableSpec.Visitor<T> visitor)

Methods inherited from class io.deephaven.qst.table.TableBase

aggAllBy, aggBy, asOfJoin, dropColumns, exactJoin, head, join, join, lazyUpdate, logic, naturalJoin, rangeJoin, reverse, select, select, selectDistinct, selectDistinct, snapshot, snapshotWhen, snapshotWhen, snapshotWhen, sort, tail, toString, ungroup, update, updateBy, updateView, view, walk, where, whereIn, whereNotIn

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.deephaven.api.TableOperationsDefaults

absSumBy, absSumBy, absSumBy, absSumBy, aggAllBy, aggAllBy, aggAllBy, aggBy, aggBy, aggBy, aggBy, aggBy, aggBy, aggBy, aj, aj, avgBy, avgBy, avgBy, avgBy, countBy, countBy, countBy, countBy, dropColumns, dropColumns, exactJoin, exactJoin, firstBy, firstBy, firstBy, firstBy, groupBy, groupBy, groupBy, join, join, join, lastBy, lastBy, lastBy, lastBy, lazyUpdate, maxBy, maxBy, maxBy, maxBy, medianBy, medianBy, medianBy, medianBy, minBy, minBy, minBy, minBy, naturalJoin, naturalJoin, raj, raj, rangeJoin, select, selectDistinct, sort, sortDescending, stdBy, stdBy, stdBy, stdBy, sumBy, sumBy, sumBy, sumBy, ungroup, ungroup, ungroup, ungroup, update, updateBy, updateBy, updateBy, updateBy, updateBy, updateBy, updateBy, updateBy, updateView, varBy, varBy, varBy, varBy, view, wavgBy, wavgBy, wavgBy, wavgBy, where, whereIn, whereNotIn, wsumBy, wsumBy, wsumBy, wsumBy

Methods inherited from interface io.deephaven.qst.table.TableSpec

depth

Constructor Details

MergeTable

public MergeTable()

Method Details

of

public static MergeTable of(TableSpec... tables)

of

public static MergeTable of(Iterable<? extends TableSpec> tables)

builder

public static MergeTable.Builder builder()

tables

public abstract List<TableSpec> tables()

walk

public final <T> T walk(TableSpec.Visitor<T> visitor)