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Home / Errors / Question No: 13

Why I see an error when I EXPLAIN for update query?

I want to analyze my update query for optimizing purpose. But when I did so I got an error #1064 in response. Why I see an error when I EXPLAIN for update query? My query for which I tried is followed:
EXPLAIN UPDATE categories SET name='books' WHERE id =1;

Answer No: 13

Because EXPLAIN is used only with SELECT statements in MySQL that is why you were getting #1064 error while running EXPLAIN with UPDATE statement. So, there is no way to EXPLAIN UPDATE query. However, you can analyze your UPDATE query by converting it like this:
EXPLAIN SELECT name FROM categories WHERE id =1;

Related MySQL FAQs to the Above FAQ

ERROR-1295-(HY000):-This-command-is-not-supported-in-the-prepared-statement-protocol-yet ERROR 1295 (HY000): This command is not supported in the prepared statement protocol yet

ERROR-1064-(42000):-You-have-an-error-in-your-SQL-syntax ERROR 1064 (42000): You have an error in your SQL syntax

1264-Out-of-range-value-adjusted-for-column 1264 Out of range value adjusted for column

1048-Column-cannot-be-null 1048 Column cannot be null

1093-You-can-not-specify-target-table-comments-for-update-in-FROM-clause 1093 You can not specify target table comments for update in FROM clause

1191-Cant-find-FULLTEXT-index-matching-the-column-list 1191-Cant find FULLTEXT index matching the column list

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