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Context

This extension provides useful environment properties such as current region where the Stream App is running.

Features

  • getVar (var, default.value)

    This functions returns the value of the var if present. If the var is unknown to the Stream App, default.value (if specified) will be returned.

getVar

This functions returns the value of the var if present. If the var is unknown to the Stream App, default.value (if specified) will be returned.

Syntax

<STRING> context:getVar(<STRING> var, <STRING> default.value)

QUERY PARAMETERS

Name Description Default Value Possible Data Types Optional Dynamic
var The variable name whose value should be returned. STRING No Yes
default.value If the var is unknown default.value will be returned. null STRING Yes Yes

SUPPORTED CONTEXT VARIABLES

Name Description
region Current region where the Stream App is ruuning e.g. gdn1-sfo2

EXAMPLE 1

select customerName, context:getVar('region') as region
from InputStream
insert into OutputStream;

EXAMPLE 2

select customerName
from InputStream[region == context:getVar('region')]
insert into OutputStream;