Fix column-less aliases resulting in phantom source columns

[crisptrutski]

Fixes metabase/metabase#44045

A bit of a mouthful.

The issue was that referring to a non-column alias could result in the Macaw interpreting those references as coming directly from one of the source tables. This was due to the fact that we ignoring aliases that were not introduced by named column references.

Clarifying example:

WITH cte AS (SELECT COUNT(*) AS a FROM foo)
SELECT a AS b FROM bar

Without this fix, we would have inferred {:table "bar" :column "a"} as a source column.

[crisptrutski]

• Generate stable Scope IDs #67 : 2 dependent PRs (#69 , #71 )
• Infer schema information from SELECT clause #65
• Fix column-less aliases resulting in phantom source columns #64 👈
• Handle pseudo tables from subselects and CTEs #61
• Avoid phantom column references from compound queries #60
• Add a bunch of compoud query fixtures, with dubious analysis #56
• Track unique ids for each scope #54
• master

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[crisptrutski]

Merge activity

• Jun 21, 7:49 AM EDT: Graphite rebased this pull request after merging its parent, because this pull request is set to merge when ready.
• Jun 21, 7:57 AM EDT: @crisptrutski merged this pull request with Graphite.