sql/analyzer: Make join_search faster #303
Merged
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
This helps the analyzer actually complete analyzing some of the example queries we're working on that have 9+ table joins. The basic idea is to recursively build every binary tree that has the in-order traversal we want and then attempt to apply join conditions to those trees.
Performance here can be further improved by coupling
visitJoinSearchNodes
andassignConditions
so that we can prune large portions of the subspace as being impossible from a join conditions standpoint. I may work on that next depending upon how further benchmarking goes. Currently a previous query which failed to analyze before take 30s.