com.illumon.iris.db.tables.utils

Class WindowCheck

java.lang.Object

com.illumon.iris.db.tables.utils.WindowCheck

public class WindowCheck
extends Object

Adds a Boolean column that is true if a Timestamp is within the specified window.

Method Summary

Modifier and Type	Method and Description
static Table	addTimeWindow(Table table, String timestampColumn, long windowNanos, String inWindowColumn) Adds a Boolean column that is false when a timestamp column is older than windowNanos.

Method Detail

addTimeWindow

public static Table addTimeWindow(Table table,
                                  String timestampColumn,
                                  long windowNanos,
                                  String inWindowColumn)

Adds a Boolean column that is false when a timestamp column is older than windowNanos.

If the timestamp is greater than or equal to the curent time - windowNanos, then the result column is true. If the timestamp is null; the InWindow value is null.

The resultant table ticks whenever the input table ticks, or modifies a row when it passes out of the window.

Parameters:

table - the input table

timestampColumn - the timestamp column to monitor in table

windowNanos - how many nanoseconds in the past a timestamp can be before it is out of the window

inWindowColumn - the name of the new Boolean column.

Returns:

a new table that contains an in-window Boolean column