How to use rap to write interfaces for adding, deleting, modifying and querying

the front end wants to simulate data through rap. How to set the API for adding, deleting, modifying and querying
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May.29,2021
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1bf71d1-32047.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1bf71d1-32047.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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