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40e27d04b4
Previously we used attname for both table and index columns, but that is problematic for indexes because their attnames are assigned by internal rules that don't guarantee to preserve the names across dump and reload. (This is what's causing the remaining buildfarm failures in cross-version-upgrade tests.) Fortunately we can use attnum instead, since there's no such thing as adding or dropping columns in an existing index. We met this same problem previously with ALTER INDEX ... SET STATISTICS, and solved it the same way, cf commit 5b6d13eec. In pg_restore_attribute_stats() itself, we accept either attnum or attname, but the policy used by pg_dump is to always use attname for tables and attnum for indexes. Author: Tom Lane <tgl@sss.pgh.pa.us> Author: Corey Huinker <corey.huinker@gmail.com> Discussion: https://postgr.es/m/1457469.1740419458@sss.pgh.pa.us