SHOW-FUNCTIONS

Name

SHOW FUNCTIONS

Description

View all custom (system-provided) functions under the database. If the user specifies a database, then view the corresponding database, otherwise directly query the database where the current session is located

Requires SHOW permission on this database

grammar

1. SHOW [FULL] [BUILTIN] FUNCTIONS [IN|FROM db] [LIKE 'function_pattern']

Parameters

full: Indicates the detailed information of the display function builtin: Indicates the functions provided by the display system db: database name to query function_pattern: parameter used to filter function names

Example

1. mysql> show full functions in testDb\G
2. **************************** 1. row ******************** ******
3. Signature: my_add(INT,INT)
4. Return Type: INT
5. Function Type: Scalar
6. Intermediate Type: NULL
7. Properties: {"symbol":"_ZN9doris_udf6AddUdfEPNS_15FunctionContextERKNS_6IntValES4_","object_file":"http://host:port/libudfsample.so","md5":"cfe7a362d10f3aaf6c49974ee0f1f878"}
8. **************************** 2. row ******************** ******
9. Signature: my_count(BIGINT)
10. Return Type: BIGINT
11. Function Type: Aggregate
12. Intermediate Type: NULL
13. Properties: { "object_file": "http: // host: port / libudasample.so", "finalize_fn": "_ZN9doris_udf13CountFinalizeEPNS_15FunctionContextERKNS_9BigIntValE", "init_fn": "_ZN9doris_udf9CountInitEPNS_15FunctionContextEPNS_9BigIntValE", "merge_fn": "_ZN9doris_udf10CountMergeEPNS_15FunctionContextERKNS_9BigIntValEPS2_", "md5": " 37d185f80f95569e2676da3d5b5b9d2f","update_fn":"_ZN9doris_udf11CountUpdateEPNS_15FunctionContextERKNS_6IntValEPNS_9BigIntValE"}
14. **************************** 3. row ******************** ******
15. Signature: id_masking(BIGINT)
16. Return Type: VARCHAR
17. Function Type: Alias
18. Intermediate Type: NULL
19. Properties: {"parameter":"id","origin_function":"concat(left(`id`, 3), `****`, right(`id`, 4))"}

21. 3 rows in set (0.00 sec)
22. mysql> show builtin functions in testDb like 'year%';
23. +---------------+
24. | Function Name |
25. +---------------+
26. | year          |
27. | years_add     |
28. | years_diff    |
29. | years_sub     |
30. +---------------+
31. 2 rows in set (0.00 sec)

Keywords

1. SHOW, FUNCTIONS

Best Practice