Maximum number of IN
When I specify 100,000 values in SELECT WHERE IN(1,2,10,), only 34,464 rows are returned. If the table does not specify Engine = Columnstore, it returns 100,000 rows correctly. Is there a limit to the number of IN() in ColumnStore? (MAX 65,535?) MariaDB Version is 10.5.11.
Thank you.
Answer Answered by Roman Nozdrin in this comment.
Columnstore converts IN with literals into a tree of predicates column = VAL1 OR column = VAL2 and sends it over the network. There is an internal limit for a depth for such tree. It corresponds with a number of bytes used to encode the tree and the upper limit for the encoded tree is 65,535 bytes.
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