stdlib: implement driver.RowsColumnScanner for Go 1.27#2542
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Go 1.27 adds the driver.RowsColumnScanner interface, which lets a driver scan a column directly into the user's destination. This means stdlib users can now scan PostgreSQL arrays, ranges, multiranges, and other pgtype-aware values directly into Go slices and pgtype types without the *pgtype.Map.SQLScanner adapter. ScanColumn first tries m.Scan for pgx-native handling, then falls back to the newly public sql.ConvertAssign on a driver.Value produced by the column codec. The fallback preserves database/sql conversion semantics (e.g., scanning a binary bool into *string yields "true"/"false") for destinations pgx does not recognize. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Go 1.27 adds the driver.RowsColumnScanner interface, which lets a driver scan a column directly into the user's destination. This means stdlib users can now scan PostgreSQL arrays, ranges, multiranges, and other pgtype-aware values directly into Go slices and pgtype types without the *pgtype.Map.SQLScanner adapter.
ScanColumn first tries m.Scan for pgx-native handling, then falls back to the newly public sql.ConvertAssign on a driver.Value produced by the column codec. The fallback preserves database/sql conversion semantics (e.g., scanning a binary bool into *string yields "true"/"false") for destinations pgx does not recognize.