{"id":3056,"date":"2025-04-17T09:05:13","date_gmt":"2025-04-17T09:05:13","guid":{"rendered":"https:\/\/www.devopssupport.in\/blog\/?p=3056"},"modified":"2025-04-17T09:05:15","modified_gmt":"2025-04-17T09:05:15","slug":"fixing-mysql-error-incorrect-definition-of-mysql-column_stats-table","status":"publish","type":"post","link":"https:\/\/www.devopssupport.in\/blog\/fixing-mysql-error-incorrect-definition-of-mysql-column_stats-table\/","title":{"rendered":"Fixing MySQL Error: Incorrect Definition of mysql.column_stats Table"},"content":{"rendered":"\n

The Problem<\/h3>\n\n\n\n
\"\"<\/figure>\n\n\n\n

While working on your MySQL server, you might come across this error in your error log:<\/p>\n\n\n\n

Error:\nIncorrect definition of table mysql.column_stats: expected column 'min_value' at position 3 to have type varbinary(255), found type varchar(255).\nIncorrect definition of table mysql.column_stats: expected column 'max_value' at position 4 to have type varbinary(255), found type varchar(255).\n<\/code><\/pre>\n\n\n\n
This error usually shows up after an upgrade or misconfiguration and indicates that MySQL\u2019s internal system table<\/strong> mysql.column_stats<\/code> has incorrect column types.<\/p>\n\n\n\n
\n\n\n\n
 Root Cause<\/h3>\n\n\n\n
The columns min_value<\/code> and max_value<\/code> in the mysql.column_stats<\/code> table are expected to have the type:<\/p>\n\n\n\n
varbinary(255)<\/code><\/pre>\n\n\n\n
But due to an unexpected change (often during manual migration or import), they are set to:<\/p>\n\n\n\n
varchar(255)<\/code><\/pre>\n\n\n\n
These fields store binary data (like histogram stats), so having them as varchar<\/code> is not valid for MySQL’s internal use.<\/p>\n\n\n\n
\n\n\n\n
How to Fix It Manually via phpMyAdmin<\/h3>\n\n\n\n
    \n
  1. Login to phpMyAdmin<\/strong>
    Go to your MySQL instance and navigate to the mysql<\/code> database.<\/li>\n\n\n\n
  2. Open the column_stats<\/code> Table<\/strong>
    Go to the Structure<\/strong> tab.<\/li>\n\n\n\n
  3. Locate the Problematic Columns<\/strong>\n
      \n
    • min_value<\/code> (currently varchar(255)<\/code>)<\/li>\n\n\n\n
    • max_value<\/code> (currently varchar(255)<\/code>)<\/li>\n<\/ul>\n<\/li>\n\n\n\n
    • Click \u201cChange\u201d on Each Column<\/strong>\n
        \n
      • Change Type<\/strong> from varchar(255)<\/code> to varbinary(255)<\/code><\/li>\n\n\n\n
      • Keep all other settings the same (Null allowed, no default value)<\/li>\n<\/ul>\n<\/li>\n\n\n\n
      • Save the Changes<\/strong><\/li>\n<\/ol>\n\n\n\n
        \n\n\n\n
        Final Result<\/h3>\n\n\n\n
        Once corrected, your column types should look like this:<\/p>\n\n\n\n
        Field<\/th>Type<\/th><\/tr><\/thead>
        min_value<\/td>varbinary(255)<\/td><\/tr>
        max_value<\/td>varbinary(255)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
        After saving the changes, you should no longer see the error in your MySQL error log.<\/p>\n\n\n\n
        \n\n\n\n
        Restart MySQL and Run Upgrade<\/h3>\n\n\n\n
        To make sure everything is fully synchronized:<\/p>\n\n\n\n
        sudo systemctl restart mysql\nsudo mysql_upgrade -u root -p\n<\/code><\/pre>\n\n\n\n
        This ensures that MySQL validates all system tables and updates metadata if needed.<\/p>\n\n\n\n
        \n\n\n\n
        Verify It\u2019s Fixed<\/h3>\n\n\n\n
        Run this SQL command to confirm that column_stats<\/code> is valid:<\/p>\n\n\n\n
        CHECK TABLE mysql.column_stats;\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
        The Problem While working on your MySQL server, you might come across this error in your error log: This error usually shows up after an upgrade or… <\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[2570,2573,2571,102,2564,2565,2569,959,2568,2572,2567,738,2566,2563],"class_list":["post-3056","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-fix-mysql-error","tag-mysql-admin","tag-mysql-column-type-mismatch","tag-mysql-error","tag-mysql-internal-table","tag-mysql-manual-fix","tag-mysql-system-tables","tag-mysql-troubleshooting","tag-mysql-upgrade-error","tag-mysql_upgrade","tag-mysql-column_stats","tag-phpmyadmin","tag-varbinary","tag-varchar"],"_links":{"self":[{"href":"https:\/\/www.devopssupport.in\/blog\/wp-json\/wp\/v2\/posts\/3056","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.devopssupport.in\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.devopssupport.in\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.devopssupport.in\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.devopssupport.in\/blog\/wp-json\/wp\/v2\/comments?post=3056"}],"version-history":[{"count":2,"href":"https:\/\/www.devopssupport.in\/blog\/wp-json\/wp\/v2\/posts\/3056\/revisions"}],"predecessor-version":[{"id":3059,"href":"https:\/\/www.devopssupport.in\/blog\/wp-json\/wp\/v2\/posts\/3056\/revisions\/3059"}],"wp:attachment":[{"href":"https:\/\/www.devopssupport.in\/blog\/wp-json\/wp\/v2\/media?parent=3056"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.devopssupport.in\/blog\/wp-json\/wp\/v2\/categories?post=3056"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.devopssupport.in\/blog\/wp-json\/wp\/v2\/tags?post=3056"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}