Package io.deephaven.engine.table.impl.by

Class RollupConstants

java.lang.Object

io.deephaven.engine.table.impl.by.RollupConstants

public final class RollupConstants
extends Object

Implementation constants for Table.rollup(java.util.Collection<? extends io.deephaven.api.agg.Aggregation>) support.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	ROLLUP_COLUMN_SUFFIX	Marker suffix for rollup-internal column names.
static final String	ROLLUP_DISTINCT_SSM_COLUMN_ID	Middle column name component (between source column name and suffix) for SSM columns used in "distinct", "count distinct", and "unique" rollup aggregations.
static final String	ROLLUP_DISTINCT_SSM_COUNT_COLUMN_ID	Middle column name component (between source column name and suffix) for the singleton-count column the "unique" rollup aggregation reads to classify each constituent state as empty (0/NULL_LONG), unique (> 0, holding a single value), or non-unique (< 0).

Method Summary

Methods inherited from class java.lang.Object

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

Field Details

ROLLUP_COLUMN_SUFFIX

public static final String ROLLUP_COLUMN_SUFFIX

Marker suffix for rollup-internal column names.

See Also:

• Constant Field Values

ROLLUP_DISTINCT_SSM_COLUMN_ID

public static final String ROLLUP_DISTINCT_SSM_COLUMN_ID

Middle column name component (between source column name and suffix) for SSM columns used in "distinct", "count distinct", and "unique" rollup aggregations.

See Also:

• Constant Field Values

ROLLUP_DISTINCT_SSM_COUNT_COLUMN_ID

public static final String ROLLUP_DISTINCT_SSM_COUNT_COLUMN_ID

Middle column name component (between source column name and suffix) for the singleton-count column the "unique" rollup aggregation reads to classify each constituent state as empty (0/NULL_LONG), unique (> 0, holding a single value), or non-unique (< 0).

See Also:

• Constant Field Values