#sqlindex — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #sqlindex, aggregated by home.social.
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Why does this SQL JSON extract never use the index?
Why does this SQL JSON extract never use the index. The SQL code queries JSON with JSON_EXTRACT. In MySQL that cannot use a regular index. In SQL use a generated column with an index.
#whatswrongwiththissqlquery #sqlbug #sqlproductionbug #sqldebugging #sqldatabase #sqlcodereview #sqlperformance #sqlreliability #sqlanalytics #sqldataintegrity #sqlengineering #sqljson #sqljsonextract #sqlindex #sq...
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What's wrong with this SQL OR killing the index?
What's wrong with this SQL OR killing the index on a search. The SQL code uses OR on two indexed columns. In MySQL OR often prevents index usage. In SQL APIs one OR turns a millisecond query into seconds.
#whatswrongwiththissqlquery #sqlbug #sqlproductionbug #sqldebugging #sqldatabase #sqlcodereview #sqlperformance #sqlreliability #sqlanalytics #sqldataintegrity #sqlengineering #sqlor #sqlindex #sq...