ydb/yt/yql/tests/sql/suites/optimizers/input5.txt.attr

{"_yql_row_spec"={
    "Type"=["StructType";[
        ["key";["DataType";"String"]];
        ["subkey";["DataType";"String"]];
        ["value";["DataType";"String"]]
    ]];
    "SortDirections"=[1;1;];
    "SortedBy"=["key";"subkey";];
    "SortedByTypes"=[["DataType";"String";];["DataType";"String";];];
    "SortMembers"=["key";"subkey";];
}}