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6bd6a6f164
reflect.Type.Kind() on spectypes.SqlNull[T] wrappers (SqlInt16/32/64, SqlFloat64, SqlBool, SqlString, and embedders like SqlTimeStamp) always reports reflect.Struct, never the wrapped T. ValidateAndAdjustFilterForColumnType treated those as "complex" columns and forced CAST(col AS TEXT) on eq/gt/lt filters, e.g. CAST(atdetail.rid_parent AS TEXT) = '90446096', which can't use the index on rid_parent. Add spectypes.UnwrapKind to see through SqlNull wrappers to the underlying Kind, and use it in GetColumnTypeFromModel so numeric/string SqlNull columns are recognized correctly and compared natively. Also stop unconditionally casting to TEXT for LIKE/ILIKE and add reflection.IsCitextColumn: citext columns are already case-insensitive, so casting them to TEXT flips to case-sensitive matching and defeats a citext index.