MySQL 5.7 Reference Manual Including MySQL NDB Cluster 7.5 and NDB Cluster 7.6
To obtain metadata about stored routines:
          Query the ROUTINES table of the
          INFORMATION_SCHEMA database. See
          Section 24.3.21, “The INFORMATION_SCHEMA ROUTINES Table”.
        
          Use the SHOW CREATE PROCEDURE
          and SHOW CREATE FUNCTION
          statements to see routine definitions. See
          Section 13.7.5.9, “SHOW CREATE PROCEDURE Statement”.
        
          Use the SHOW PROCEDURE STATUS
          and SHOW FUNCTION STATUS
          statements to see routine characteristics. See
          Section 13.7.5.28, “SHOW PROCEDURE STATUS Statement”.
        
          Use the SHOW PROCEDURE CODE and
          SHOW FUNCTION CODE statements
          to see a representation of the internal implementation of the
          routine. See Section 13.7.5.27, “SHOW PROCEDURE CODE Statement”.