ydb/yql/essentials/tests/s-expressions/suites/Lib/Decode.sql

SELECT Core::Decode("key1",AsList("key1","value1","key2","value2"),"default");
SELECT Core::Decode("key2",AsList("key1","value1","key2","value2"),"default");
SELECT Core::Decode("keyZ",AsList("key1","value1","key2","value2"),"default");