Fix alias, maintain column sort order #3564
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| // Get the distinct fields across all mappers. | ||
| var selectFields, aliasFields []string | ||
| if e.stmt.HasWildcard() { | ||
| sf := newStringSet() |
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Should this still be a stringset? What about select mean(value), max(value) from foo?
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For select * a stringSet works perfect as it gets you the distinct fields sorted alphabetically. It's when it wasn't a select * that the problem was encountered, and what this PR fixes.
select mean(value), max(value) from foo scenario works and is tested with this test:
https://github.com/influxdb/influxdb/pull/3564/files#diff-09d8dc75f001e1e2a64439ee67dd14cbR1062
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Fix alias, maintain column sort order
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This PR fixes a couple issues.
Aliasing was no longer working per this issue:
Fixes #3530
Also, we were not maintaining column select order in our results. For example, if we issued
select foo, bar from bazthe column order in the return would bebar, foo, notfoo, bar. This is now corrected.