8 Commits

Author	SHA1	Message	Date
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
Anton Popov	06dc0155e5	allow to read subhcolumns from other storages	2020-10-23 17:44:23 +03:00
Anton Popov	cb4801e3be	allow to read subcolumns of complex types	2020-09-18 02:12:43 +03:00
Anton Popov	53e955c6dd	several fixes	2020-06-29 23:36:18 +03:00
alesapin	dffdece350	getColumns in StorageInMemoryMetadta (only compilable)	2020-06-17 19:39:58 +03:00
alesapin	1afdebeebd	Primary key in storage metadata	2020-06-17 15:39:20 +03:00
Gleb Novikov	390b39b272	VolumePtr instead of DiskPtr in MergeTreeData*	2020-05-10 00:24:15 +03:00
Ivan Lezhankin	06446b4f08	dbms/ → src/	2020-04-03 18:14:31 +03:00