A problem about the error of Mysql unique index

has encountered an unprecedented problem, which can not be solved. Ask the boss for help

wh_code_id
sql pouy_pickup_point

wh_cust_id wh_cust_id wh_code_id


Mar.28,2021

people are talking about key. Key==index . .


is the default value for the wh_code field "HF"? In addition, is there an index?

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-64f5-1eb4f52-2516.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1eb4f52-2516.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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