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

SQL Data Types and Literals

Product
Advanced SQL Engine
Teradata Database
Release Number
17.05
17.00
Published
June 2020
Language
English (United States)
Last Update
2021-01-22
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zsn1556242031050.ditamap
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dita:id
B035-1143
lifecycle
previous
Product Category
Teradata Vantageā„¢

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;