8 Commits

Author	SHA1	Message	Date
Amos Bird	3be331edeb	Better exception for invalid projection creation	2021-05-31 12:24:09 +08:00
Amos Bird	edd23d06ad	Fix alter table drop projection if exists	2021-05-28 21:27:36 +08:00
Amos Bird	dfa5629071	Remove projection type ast	2021-05-11 18:12:29 +08:00
Amos Bird	35961c0c5d	Use ActionsDAG to rewrite projection queries	2021-05-11 18:12:27 +08:00
Nikolai Kochetov	bf95b684a7	Remove copy constructor from ProjectionDescription	2021-05-11 18:12:27 +08:00
Nikolai Kochetov	29d7038e30	Add ProjectionDescription::Type enum. Remove some checks.	2021-05-11 18:12:27 +08:00
Nikolai Kochetov	95431168c2	Try to enable normal projections.	2021-05-11 18:12:26 +08:00
Amos Bird	264cff6415	Projections ... TODO (suggested by Nikolai) 1. Build query plan fro current query (inside storage::read) up to WithMergableState 2. Check, that plan is simple enough: Aggregating - Expression - Filter - ReadFromStorage (or simplier) 3. Check, that filter is the same as filter in projection, and also expression calculates the same aggregation keys as in projection 4. Return WithMergableState if projection applies 3 will be easier to do with ActionsDAG, cause it sees all functions, and dependencies are direct (but it is possible with ExpressionActions also) Also need to figure out how prewhere works for projections, and row_filter_policies. wip	2021-05-11 18:12:23 +08:00