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Create Trigger by Area

Sets up an area trigger mechanism for two column_names for one or more tables. (This function is essentially the two-dimensional version of Create Trigger by Range.) Once the trigger has been activated, any record added to the listed tables(s) via Insert Records Request with the chosen columns' values falling within the specified region will trip the trigger. All such records will be queued at the trigger port (by default '9001' but able to be retrieved via Show System Status) for any listening client to collect. Active triggers can be cancelled by using the Clear Trigger endpoint or by clearing all relevant tables.

The output returns the trigger handle as well as indicating success or failure of the trigger activation.

Input Parameter Description

Name Type Description
request_id string User-created ID for the trigger. The ID can be alphanumeric, contain symbols, and must contain at least one character.
table_names array of strings Names of the tables on which the trigger will be activated and maintained.
x_column_name string Name of a numeric column on which the trigger is activated. Usually 'x' for geospatial data points.
x_vector array of doubles The respective coordinate values for the region on which the trigger is activated. This usually translates to the x-coordinates of a geospatial region.
y_column_name string Name of a second numeric column on which the trigger is activated. Usually 'y' for geospatial data points.
y_vector array of doubles The respective coordinate values for the region on which the trigger is activated. This usually translates to the y-coordinates of a geospatial region. Must be the same length as xvals.
options map of string to strings Optional parameters. The default value is an empty map ( {} ).

Output Parameter Description

Name Type Description
trigger_id string Value of input parameter request_id.
info map of string to strings Additional information.