yql/essentials/tests/sql/suites/join/left_join_input1.txt.attr


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{
    "_yql_row_spec"={
        "Type"=["StructType";[
            ["Key1";["OptionalType";["DataType";"Int32"]]];
            ["Key2";["OptionalType";["DataType";"String"]]];
            ["Fk1";["OptionalType";["DataType";"String"]]];
            ["Value";["OptionalType";["DataType";"String"]]]]
        ];
    };
}