17.10 - Example: Using Extra Columns - Advanced SQL Engine - Teradata Database

Teradata Vantageā„¢ - DATASET Data Type

Product
Advanced SQL Engine
Teradata Database
Release Number
17.10
Release Date
July 2021
Content Type
Programming Reference
Publication ID
B035-1198-171K
Language
English (United States)

To make the example simple, constants are used when possible from a column.

SELECT * FROM DATASET_Table (
	ON (SELECT id, DatasetCol, 'CA' AS state, 'USA' AS nation 
	    FROM my_table WHERE id=1)
	USING rowexpr('$.schools[*]')  
	colexpr(
		'[ {"dotnotation" : "$.name",
		    "type" : "CHAR(20)"},
		   {"dotnotation" : "$.type",
              "type" : "VARCHAR(20)"}]')
) AS JT(id, name, "type", State, Nation);

 *** Query completed. 4 rows found. 5 columns returned.
 *** Total elapsed time was 1 second.

         id  name     type                  State  Nation
-----------  -------- --------------------  -----  ------
          1  Lake     elementary            CA     USA
          1  Madison  middle                CA     USA
          1  Rancho   high                  CA     USA
          1  UCI      college               CA     USA