4 Commits

Author	SHA1	Message	Date
Nikita Mikhaylov	15896ecaf6	Add table system.keywords [Part 1] (#51808)	2024-03-18 16:58:57 +01:00
Amos Bird	2debfc922d	Better projection format and test fixes	2022-02-07 10:47:11 +08:00
Amos Bird	9bbc9f97b4	Implement antlr parser for projections (#24245) ... * implement projection grammer for antlr parser * Add comment	2021-06-02 18:09:55 +03:00
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