17.00 - Example: HELP COLUMN for a JSON Column with the Auto Column Option - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - SQL Data Definition Language Syntax and Examples

Product
Advanced SQL Engine
Teradata Database
Release Number
17.00
Release Date
September 2020
Content Type
Programming Reference
Publication ID
B035-1144-170K
Language
English (United States)

Here is the table definition of MyTable for this example, where the JSON column c is defined with the AUTO COLUMN option.

     CREATE TABLE TEST.MyTable (
      a INTEGER,
      b JSON(16776192) INLINE LENGTH 4096 CHARACTER SET LATIN,
      c JSON(16776192) INLINE LENGTH 4096 CHARACTER SET LATIN AUTO COLUMN)
     PRIMARY INDEX ( a );

This statement displays information for column c of the table MyTable.

     HELP COLUMN MyTable.c;

Below is the abbreviated HELP COLUMN output for selected attributes.

Column Name c
Type JN
Nullable Y
Format X(64000)
Max Length 16,776,192
Table/View? T
Storage Format TEXT
Inline Length 4,096
Transform Length 16,776,192
Auto Column Y

If the AUTO COLUMN option is not set, the value is NULL, or question mark (?) in BTEQ output.