5 Commits

Author	SHA1	Message	Date
Amos Bird	dfa5629071	Remove projection type ast	2021-05-11 18:12:29 +08:00
Amos Bird	ba17acbd63	Fix tests	2021-05-11 18:12:28 +08:00
Amos Bird	e1e560765c	Fix missing columns	2021-05-11 18:12:27 +08:00
Amos Bird	483bd165e7	Check if pipeline is simple and add more comments	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