[SPARK-28810][DOC][SQL] Document SHOW TABLES in SQL Reference. #25561
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| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| --- | ||
| ### Description | ||
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| The `SHOW TABLES` statement returns all the tables for an optionally specified database. | ||
| Additionally, the output of this statement may be filtered by an optional matching | ||
| pattern. If no database is specified then the tables are returned from the | ||
| current database. | ||
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| ### Syntax | ||
| {% highlight sql %} | ||
| SHOW TABLES [{FROM|IN} database_name] [LIKE 'regex_pattern'] | ||
| {% endhighlight %} | ||
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| ### Parameters | ||
| <dl> | ||
| <dt><code><em>{FROM|IN} database_name</em></code></dt> | ||
| <dd> | ||
| Specifies the database name from which tables are listed. | ||
| </dd> | ||
| <dt><code><em>LIKE regex_pattern</em></code></dt> | ||
| <dd> | ||
| Specifies the regular expression pattern that is used to filter out unwanted tables. | ||
| <ul> | ||
| <li> Except for `*` and `|` character, the pattern works like a regex.</li> | ||
| <li> `*` alone matches 0 or more characters and `|` is used to separate multiple different regexes, | ||
| any of which can match. </li> | ||
| <li> The leading and trailing blanks are trimmed in the input pattern before processing.</li> | ||
| </ul> | ||
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| </dd> | ||
| </dl> | ||
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| ### Example | ||
| {% highlight sql %} | ||
| -- List all tables in default database | ||
| SHOW TABLES; | ||
| +-----------+------------+--------------+--+ | ||
| | database | tableName | isTemporary | | ||
| +-----------+------------+--------------+--+ | ||
| | default | sam | false | | ||
| | default | sam1 | false | | ||
| | default | suj | false | | ||
| +-----------+------------+--------------+--+ | ||
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| -- List all tables from userdb database | ||
| SHOW TABLES FROM userdb; | ||
| +-----------+------------+--------------+--+ | ||
| | database | tableName | isTemporary | | ||
| +-----------+------------+--------------+--+ | ||
| | userdb | user1 | false | | ||
| | userdb | user2 | false | | ||
| +-----------+------------+--------------+--+ | ||
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| -- List all tables in userdb database | ||
| SHOW TABLES IN userdb; | ||
| +-----------+------------+--------------+--+ | ||
| | database | tableName | isTemporary | | ||
| +-----------+------------+--------------+--+ | ||
| | userdb | user1 | false | | ||
| | userdb | user2 | false | | ||
| +-----------+------------+--------------+--+ | ||
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| -- List all tables from default database matching the pattern `sam*` | ||
| SHOW TABLES FROM default LIKE 'sam*'; | ||
| +-----------+------------+--------------+--+ | ||
| | database | tableName | isTemporary | | ||
| +-----------+------------+--------------+--+ | ||
| | default | sam | false | | ||
| | default | sam1 | false | | ||
| +-----------+------------+--------------+--+ | ||
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| -- List all tables matching the pattern `sam*|suj` | ||
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Contributor
There was a problem hiding this comment. Nit: can we have a line between previous test and this one.
Contributor
Author
There was a problem hiding this comment. @dilipbiswal |
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| SHOW TABLES LIKE 'sam*|suj'; | ||
| +-----------+------------+--------------+--+ | ||
| | database | tableName | isTemporary | | ||
| +-----------+------------+--------------+--+ | ||
| | default | sam | false | | ||
| | default | sam1 | false | | ||
| | default | suj | false | | ||
| +-----------+------------+--------------+--+ | ||
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| {% endhighlight %} | ||
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| ### Related statements | ||
| - [CREATE TABLE](sql-ref-syntax-ddl-create-table.html) | ||
| - [DROP TABLE](sql-ref-syntax-ddl-drop-table.html) | ||
| - [CREATE DATABASE](sql-ref-syntax-ddl-create-database.html) | ||
| - [DROP DATABASE](sql-ref-syntax-ddl-drop-database.html) | ||
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Please lets fix the formatting. Did we construct this output by hand ? Can we paste the
actual output here please so we preserve the formatting.
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@dilipbiswal
I just Copy and paste the actual output from the Beeline console
Here is the beeline console snap
In the UI it looks like below, i think it is normal
Only in the git file editor, it shows inconsistent.