Straight_join is intended as an instruction to the mysql query optimiser that the tables must be joined from left to right in the order they are listed in the query. Turns out mysql is to blame because it's not joining in the order we ask it to. 37 join order can be forced by putting the tables in the right order in the from clause:
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I upvoted this before i found out that straight_join can indeed be added to the list of columns selected instead of being added to the list of tables, which is trivial to do in a. If you can post the query you are trying to run, there. Adding straight_join after select like:
Mysql has a special clause called straight_join which makes the order matter.
By specifying a complex query as a straight_join the query executes the joins in the order they’re. Select * from table inner join othertable on table.id = othertable.fk is there any difference between the statements in performance or otherwise? I have the following mysql query: What is the order mysql joins the tables, how is it chosen and when does straight_join comes in handy?
While i tried to use straight_join, it was using index_transactions_on_transaction_date, and was executed quickly on user 71720. Select t1.* from table1 t1 inner join table2 t2 on t1.commonid = t2.commonid where t1.filterid = 1 it takes about 30 seconds to run, which. Mysql isn’t necessarilly good at choosing the join order in complex queries. Straight_join just helps when you know the proper relation of tables and don't want the engine to think for you.
