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explain

explain(arel, binds = [])

Instance Public methods

DATABASE STATEMENTS ======================================

Links:

https://github.com/rails/rails/blob/c6110da063e7e0ac9c2ffd341c2ff329b3bfdb6f/activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb#L112

doc_ruby_on_rails

2015-06-20 00:00:00

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explain explain() Instance Public methods Runs EXPLAIN on the query or queries triggered by this relation and returns the result as a string. Th

explain explain(arel, binds = []) Instance Public methods

explain explain(arel, binds = []) Instance Public methods DATABASE STATEMENTS ======================================

MongoCursor::explain (PECL mongo >=0.9.2) Return an explanation of the query, often useful for optimization and debugging

EXPLAIN NameEXPLAIN -- show the execution plan of a statement Synopsis EXPLAIN [ ( option [, ...] ) ] statement EXPLAIN [ ANALYZE ] [ VERBOSE ] stateme