Redshift helper functions #20958
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Redshift helper functions #20958
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Add two helpful functions in redshift:
is_json: confirms whether a field contains JSON, and returns a boolean. Useful for JSON parsing functions in Redshift which barf if any row does not contain JSON.miles_from_lat_lng: calculates milage distance between two sets of lat/lng coordinates. Useful in calculating distance between teacher's schools (we have lat/lng) and the location of PD workshops (we store lat/lng)