Support SELECT without a FROM clause#4199
Open
arnaud-lacurie wants to merge 4 commits into
Open
Conversation
Constant-expression queries like SELECT 'bob' or SELECT 1 + 1 are now accepted. When no FROM clause is present, the planner synthesizes a single-row source (ExplodeExpression over a one-element array) so that the existing Cascades rules can plan and execute the query unchanged.
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
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Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be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.
Summary
SELECT 'bob',SELECT 1 + 1, and similar constant-expression queries are now supportedUNSUPPORTED_QUERYExplodeExpressionover a one-element array) so the existing Cascades implementation rules match and execute unchangedTest plan
select-without-from.yamsql) covering string literal, integer literal, arithmetic expression, multiple columns, and boolean literal