Fix PARTITION BY bug for spatial projections#479
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project_position_columns and the spatial materialization path built explicit SELECT lists from only aesthetic columns, dropping any PARTITION BY columns from the output. Include partition_by in the column set via a new util::set_union helper. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Regression test: verifies that PARTITION BY columns survive the densification and projection transform pipeline for non-spatial layers with map projections. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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I forgot to include the
PARTITION BYcolumns in the projection code, so when actually using them they wouldn't be found.This PR fixes that oversight.