17.10 - Example: Query a 2-D ARRAY Data Type and Table using OFIRST - Advanced SQL Engine - Teradata Database

Teradata Vantageā„¢ - Data Types and Literals

Advanced SQL Engine
Teradata Database
Release Number
Release Date
July 2021
Content Type
Programming Reference
Publication ID
English (United States)

Consider the following 2-D ARRAY data type and table.

CREATE TYPE shot_ary AS VARRAY(1:50)(1:50) OF INTEGER;
CREATE TABLE seismic_table (
   id INTEGER,
   shots shot_ary);

The table is populated with the following values:

/* The first 2 elements are populated; the rest are uninitialized. */
INSERT INTO seismic_table VALUES (1, shot_ary(11, 12));
/* Empty ARRAY instance */
INSERT INTO seismic_table VALUES (2, shot_ary());

The following query returns the lowest subscript value in the shots array.

SELECT id, shots.OFIRST()
FROM seismic_table;

The following is the result of the query.

ID          shots.OFIRST()
--          --------------
 1           NEW arrayVec(1,1)
 2           NEW arrayVec(1,1)

The following is the same query using function-style syntax.

SELECT id, OFIRST(shots)
FROM seismic_table;