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SHOW COLUMNS

Synopsis:

SHOW COLUMNS
    [CATALOG identifier]? 
    [INCLUDE FROZEN]?     
    [FROM | IN]
    [table_identifier |   
     LIKE pattern]

	Catalog (cluster) identifier. Supports wildcards (`*`).
	Whether or not to include frozen indices.
	Single table (index or data stream) identifier or double-quoted multi-target pattern.
	SQL LIKE pattern matching table names.

See index patterns for more information about patterns.

Description: List the columns in table and their data type (and other attributes).

SHOW COLUMNS IN emp;

       column       |     type      |    mapping
--------------------+---------------+---------------
birth_date          |TIMESTAMP      |datetime
dep                 |STRUCT         |nested
dep.dep_id          |VARCHAR        |keyword
dep.dep_name        |VARCHAR        |text
dep.dep_name.keyword|VARCHAR        |keyword
dep.from_date       |TIMESTAMP      |datetime
dep.to_date         |TIMESTAMP      |datetime
emp_no              |INTEGER        |integer
first_name          |VARCHAR        |text
first_name.keyword  |VARCHAR        |keyword
gender              |VARCHAR        |keyword
hire_date           |TIMESTAMP      |datetime
languages           |TINYINT        |byte
last_name           |VARCHAR        |text
last_name.keyword   |VARCHAR        |keyword
name                |VARCHAR        |keyword
salary              |INTEGER        |integer

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