February 2018
Intermediate to advanced
510 pages
16h 10m
English
Content preview from MySQL 8 Administrator???s Guide
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FULLTEXT indexes
As the name implies, FULLTEXT indexes allow CHAR, VARCHAR, and TEXT columns only. This index is supported by InnoDB and MyISAM storage engines. In this type, indexing will take place on an entire column, rather than a prefix length. MySQL 8 evaluates the full text expression during the optimization phase of the query execution. Before making estimations, optimization evaluates the full text expression in the process of developing an execution plan. As a result, the EXPLAIN query of full text is slower than non-full text queries. Full text queries are useful in the following scenarios:
- When a FULLTEXT query returns either a document ID or a document ID and search rank
- When a FULLTEXT query sorts the matching rows by descending ...
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