[MDEV-17535] EXISTS subquery with CTE does not accept multiple brackets Created: 2018-10-24  Updated: 2018-10-24  Resolved: 2018-10-24

Status: Closed
Project: MariaDB Server
Component/s: Optimizer - CTE
Affects Version/s: 10.3.10
Fix Version/s: N/A

Type: Bug Priority: Major
Reporter: Remy Fox Assignee: Unassigned
Resolution: Not a Bug Votes: 0
Labels: None


 Description   

The following queries are all valid, except the last one, which is unexpected.

	SELECT ALL
 
		*
 
	FROM users
 
	WHERE
 
		EXISTS
 
			(
 
				WITH RECURSIVE `test` AS (SELECT ALL 1)
 
				SELECT ALL 1
 
			)


	SELECT ALL
 
		*
 
	FROM users
 
	WHERE
 
		EXISTS
 
			(
 
				(
 
					SELECT ALL 1
 
				)
 
			)


			
	SELECT ALL
 
		*
 
	FROM users
 
	WHERE
 
		1 IN
 
			(
 
				(
 
					WITH RECURSIVE `test` AS (SELECT ALL 1)
 
					SELECT ALL 1
 
				)
 
			)


	SELECT ALL
 
		*
 
	FROM users
 
	WHERE
 
		EXISTS
 
			(
 
				(
 
					WITH RECURSIVE `test` AS (SELECT ALL 1)
 
					SELECT ALL 1
 
				)
 
			)



 Comments   
Comment by Elena Stepanova [ 2018-10-24 ]

See comments to MDEV-10060 for an explanation why it's not a bug.

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