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MySQL - SHOW PROCEDURE STATUS Statement
SHOW PROCEDURE STATUS Statement
Stored procedures are sub routines, segment of SQL statements which are stored in SQL catalog. All the applications that can access Relational databases (Java, Python, PHP etc.), can access stored procedures.
Stored procedures contain IN and OUT parameters or both. They may return result sets in case you use SELECT statements. Stored procedures can return multiple result sets.
The MySQL SHOW PROCEDURE STATUS statement displays the features of the stored procedures. It provides information such as −
- Name of the procedure.
- Database in which it is created.
- Type of the procedure.
- Creator of the procedure.
- Modification dates etc…
Syntax
Following is the syntax the PROCEDURE STATUS statement −
SHOW PROCEDURE STATUS [LIKE 'pattern' | WHERE expr]
Example
Following statement displays the characteristics of stored procedures −
SHOW PROCEDURE STATUS\G;
Output
Following is the output of the above query −
************ 1. row ************ Db: test Name: areaOfCircle Type: PROCEDURE Definer: root@localhost Modified: ------------------ Created: ------------------ Security_type: DEFINER Comment: character_set_client: cp850 collation_connection: cp850_general_ci Database Collation: utf8mb4_0900_ai_ci ************ 2. row ************ Db: test Name: case_example Type: PROCEDURE Definer: root@localhost Modified: ------------------ Created: ------------------ Security_type: DEFINER Comment: character_set_client: cp850 collation_connection: cp850_general_ci Database Collation: utf8mb4_0900_ai_ci ************ 3. row ************ Db: test Name: coursedetails_CASE Type: PROCEDURE Definer: root@localhost Modified: ------------------ Created: ------------------ Security_type: DEFINER Comment: character_set_client: cp850 collation_connection: cp850_general_ci Database Collation: utf8mb4_0900_ai_ci ************ 4. row ************ Db: test Name: curdemo Type: PROCEDURE Definer: root@localhost Modified: ------------------ Created: ------------------ Security_type: DEFINER Comment: character_set_client: cp850 collation_connection: cp850_general_ci Database Collation: utf8mb4_0900_ai_ci ************ 5. row ************ Db: ooo Name: cursorExample Type: PROCEDURE Definer: root@localhost Modified: ------------------ Created: ------------------ Security_type: DEFINER Comment: character_set_client: cp850 collation_connection: cp850_general_ci Database Collation: utf8mb4_0900_ai_ci ************ 6. row ************ Db: test Name: demo Type: PROCEDURE Definer: root@localhost Modified: ------------------ Created: ------------------ Security_type: DEFINER Comment: character_set_client: cp850 collation_connection: cp850_general_ci Database Collation: utf8mb4_0900_ai_ci . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The LIKE clause
Using the LIKE clause, you can specify a pattern to retrieve information about the procedures.
Example
Assume we have created a new database and created 3 procedures in it using the CREATE statement as shown below −
SHOW CREATE demo; use dem; database changed DELIMITER // CREATE PROCEDURE sample1 () BEGIN SELECT 'This is a sample procedure'; END// Query OK, 0 rows affected (0.29 sec) CREATE PROCEDURE sample2 () BEGIN SELECT 'This is a sample procedure'; END// Query OK, 0 rows affected (0.29 sec) CREATE PROCEDURE sample3 () BEGIN SELECT 'This is a sample procedure'; END// Query OK, 0 rows affected (0.29 sec) CREATE PROCEDURE sample4 () BEGIN SELECT 'This is a sample procedure'; END// DELIMITER ;
Following query retrieves the information about the procedures whose name starts with the letter "e".
SHOW PROCEDURE STATUS LIKE 'sample%'\G;
Output
The above query generates the output shown below −
************ 1. row ************ Db: demo Name: sample1 Type: PROCEDURE Definer: root@localhost Modified: 2021-05-13 21:54:02 Created: 2021-05-13 21:54:02 Security_type: DEFINER Comment: character_set_client: cp850 collation_connection: cp850_general_ci Database Collation: utf8mb4_0900_ai_ci ************ 2. row ************ Db: xo Name: sample2 Type: PROCEDURE Definer: root@localhost Modified: 2021-05-13 21:54:07 Created: 2021-05-13 21:54:07 Security_type: DEFINER Comment: character_set_client: cp850 collation_connection: cp850_general_ci Database Collation: utf8mb4_0900_ai_ci ************ 3. row ************ Db: xo Name: sample3 Type: PROCEDURE Definer: root@localhost Modified: 2021-05-13 21:54:13 Created: 2021-05-13 21:54:13 Security_type: DEFINER Comment: character_set_client: cp850 collation_connection: cp850_general_ci Database Collation: utf8mb4_0900_ai_ci ************ 4. row ************ Db: xo Name: sample4 Type: PROCEDURE Definer: root@localhost Modified: 2021-05-13 21:54:19 Created: 2021-05-13 21:54:19 Security_type: DEFINER Comment: character_set_client: cp850 collation_connection: cp850_general_ci Database Collation: utf8mb4_0900_ai_ci
The WHERE clause
You can use the WHERE clause of the SHOW PROCEDURE STATUS statements to retrieve information about the procedures which match the specified condition.
Example
Suppose we have created a table named Employee in the database as shown below −
CREATE TABLE Employee( Name VARCHAR(255), Salary INT NOT NULL, Location VARCHAR(255) );
Let us created a stored procedure myProcedurewhich accepts the name, salary and location values and inserts them as a record into the above create table.
DELIMITER // Create procedure myProcedure ( IN name VARCHAR(30), IN sal INT, IN loc VARCHAR(45)) BEGIN INSERT INTO Employee(Name, Salary, Location) VALUES (name, sal, loc); END // DELIMITER ;
In the same way following procedure retrieves all the records of in the above created table −
Create procedure retrieveRecords () BEGIN SELECT * FROM Dispatches; END //
IYou can verify the list of procedures in a database using the SHOW PROCEDURE STATUS statement as shown below −
SHOW PROCEDURE STATUS WHERE db = 'test'\G;
Output
Once the query is executed, it will generate the following output −
************ 1. row ************ Db: test Name: myProcedure Type: PROCEDURE Definer: root@localhost Modified: 2021-03-22 14:02:01 Created: 2021-03-22 14:01:42 Security_type: DEFINER Comment: This is a sample comment character_set_client: cp850 collation_connection: cp850_general_ci Database Collation: utf8mb4_0900_ai_ci ************ 2. row ************ Db: test Name: retrieveRecords Type: PROCEDURE Definer: root@localhost Modified: 2021-03-22 15:15:09 Created: 2021-03-22 15:15:09 Security_type: DEFINER Comment: character_set_client: cp850 collation_connection: cp850_general_ci Database Collation: utf8mb4_0900_ai_ci
Following queries deletes/drops the above created procedures −
DROP PROCEDURE myProcedure; DROP PROCEDURE retrieveRecords;
Verification
Since we have deleted both the procedures. If you verify the list of procedures again you will get an empty set −
SHOW PROCEDURE STATUS WHERE db = 'test'; Empty set (0.00 sec)
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