sql - mysql incorrect key file for table -

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i have following table named posts

column              type            null    default comments postid              bigint(20)      no      0     source              varchar(10)     no        profanity           tinyint(1)      no      0     postcreated         bigint(15)      yes     null      postmessage         varchar(255)    yes     null      possibleduplicate   varchar(255)    yes     null    used checking duplicate messages  posturl             varchar(255)    yes     null      posttype            varchar(10)     no        posttag             tinyint(11)     no      0     media               varchar(255)    yes     null    first result of coalesce media1-4  media1              varchar(255)    yes     null      media2              varchar(255)    yes     null      media3              varchar(255)    yes     null      media4              varchar(255)    yes     null      latitude            varchar(255)    yes     null      longitude           varchar(255)    yes     null      userid              bigint(20)      yes     null      username            varchar(255)    yes     null      userfullname        varchar(255)    yes     null      userprofilepicture  varchar(255)    yes     null

it has following indexes:

keyname         type    unique  packed  column          cardinality collation   null    comment primary         btree   yes     no      postid          355837                no                                           posttag         355837                no postcreated     btree   no      no      postcreated     355837                yes  posttagindex    btree   no      no      posttag         16                    no                                           postcreated     355837                yes                                         profanity       355837                no source          btree   no      no      source          139                   no                                           posttag         265                   no filters         btree   no      no      posttag         16                    no      used when filtering results                                         profanity       16                    no                                         postmessage     355837                yes                                         postcreated     355837                yes

when run query:

select     *     `posts`     (         `posttag` = 24         , `profanity` != 0     ) , (     (         `source` = "instagram"         , substring(`postmessage`, 1, 4) != 'rt @'         , `profanity` = - 1     )     or (         `source` = "twitter"         , substring(`postmessage`, 1, 4) != 'rt @'         , `profanity` = - 1     ) ) order     `postcreated` desc limit 0,  25

everything fine, when run query:

select     *     `posts`     (         `posttag` = 24         , `profanity` != 0     ) , (     (         `source` = "instagram"         , substring(`postmessage`, 1, 4) != 'rt @'         , `profanity` = - 1     )     or (         `source` = "twitter"         , substring(`postmessage`, 1, 4) != 'rt @'         , `profanity` = - 1     ) ) group  `possibleduplicate` order     `postcreated` desc limit 0,  25

i following error:

[err] 126 - incorrect key file table '/tmp/#sql_6e6_0.myi'; try repair it

it happens when add group possibleduplicate query. possibleduplicate text, it's empty. table has around 358399 rows @ moment. can me fix this.


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