Rumah >pangkalan data >tutorial mysql >Bagaimanakah kita boleh melihat senarai fungsi yang disimpan dalam pangkalan data MySQL tertentu dengan maklumat lengkap?
Kami boleh melihat senarai fungsi yang disimpan dalam pangkalan data MySQL tertentu dengan maklumat lengkap dalam mysql.proc dengan pertanyaan berikut -
mysql> Select * from mysql.proc where db = 'query' AND type = 'FUNCTION' \G *************************** 1. row *************************** db: query name: factorial type: FUNCTION specific_name: factorial language: SQL sql_data_access: CONTAINS_SQL is_deterministic: YES security_type: DEFINER param_list: n DECIMAL(3,0) returns: decimal(20,0) body: BEGIN DECLARE factorial DECIMAL(20,0) DEFAULT 1; DECLARE counter DECIMAL(3,0); SET counter = n; factorial_loop: REPEAT SET factorial = factorial * counter; SET counter = counter - 1; UNTIL counter = 1 END REPEAT; RETURN factorial; END definer: root@localhost created: 2021-11-16 14:04:48 modified: 2021-11-16 14:04:48 sql_mode: ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION comment: character_set_client: cp850 collation_connection: cp850_general_ci db_collation: latin1_swedish_ci body_utf8: BEGIN DECLARE factorial DECIMAL(20,0) DEFAULT 1; DECLARE counter DECIMAL(3,0); SET counter = n; factorial_loop: REPEAT SET factorial = factorial * counter; SET counter = counter - 1; UNTIL counter = 1 END REPEAT; RETURN factorial; END *************************** 2. row *************************** db: query name: Hello type: FUNCTION specific_name: Hello language: SQL sql_data_access: CONTAINS_SQL is_deterministic: YES security_type: DEFINER param_list: s CHAR(20) returns: char(50) CHARSET latin1 body: RETURN CONCAT('Hello, ',s,'!') definer: root@localhost created: 2017-11-12 11:42:31 modified: 2017-11-12 11:42:31 sql_mode: ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION comment: character_set_client: cp850 collation_connection: cp850_general_ci db_collation: latin1_swedish_ci body_utf8: RETURN CONCAT('Hello, ',s,'!') 2 rows in set (0.06 sec)
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