DESCRIBE SCHEMA¶

Syntaxe¶

DESC[RIBE] SCHEMA <schema_name>

Paramètres¶

schema_name

Spécifie l’identificateur du schéma à décrire.

Notes sur l’utilisation¶

• Pour post-traiter la sortie de cette commande, vous pouvez utiliser la syntaxe opérateur de canal (->>) ou la fonction RESULT_SCAN. Les deux constructions traitent la sortie comme un jeu de résultats que vous pouvez interroger.

  For example, you can use the pipe operator or RESULT_SCAN function to select specific columns from the SHOW command output or filter the rows.

  When you refer to the output columns, use double-quoted identifiers for the column names. For example, to select the output column type, specify SELECT "type".

  You must use double-quoted identifiers because the output column names for SHOW commands are in lowercase. The double quotes ensure that the column names in the SELECT list or WHERE clause match the column names in the SHOW command output that was scanned.

Exemples¶

Ceci démontre la commande DESCRIBE SCHEMA :

CREATE SCHEMA sample_schema_2;
USE SCHEMA sample_schema_2;

CREATE TABLE sample_table_1 (i INTEGER);

CREATE VIEW sample_view_1 AS
    SELECT i FROM sample_table_1;

CREATE MATERIALIZED VIEW sample_mview_1 AS
    SELECT i FROM sample_table_1 WHERE i < 100;

DESCRIBE SCHEMA sample_schema_2;

+-------------------------------+----------------+-------------------+
| created_on                    | name           | kind              |
|-------------------------------+----------------+-------------------|
| 2022-06-23 01:00:00.000 -0700 | SAMPLE_TABLE_1 | TABLE             |
| 2022-06-23 02:00:00.000 -0700 | SAMPLE_VIEW_1  | VIEW              |
| 2022-06-23 03:00:00.000 -0700 | SAMPLE_MVIEW_1 | MATERIALIZED_VIEW |
+-------------------------------+----------------+-------------------+