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Work on BEAM-6133 started by Gleb Kanterov. ------------------------------------------- > [SQL] Add support for TableMacro UDF > ------------------------------------ > > Key: BEAM-6133 > URL: https://issues.apache.org/jira/browse/BEAM-6133 > Project: Beam > Issue Type: New Feature > Components: dsl-sql > Reporter: Gleb Kanterov > Assignee: Gleb Kanterov > Priority: Major > Time Spent: 2h 20m > Remaining Estimate: 0h > > Now we support only ScalarFunction UDFs. In Calcite, there are other kinds of > UDFs. With TableMacro UDFs users can connect external data sources in a > similar way as in TableProvider, but without specifying a schema, or > enumerating a list of existing tables in advance. > An example use case is connecting external metadata service and querying > range of partitions. > {code} > SELECT COUNT(*) FROM table(my_udf('dataset', start = '2017-01-01', end = > '2018-01-01')) > {code} > Where the implementation of `my_udf` will connect to this service, get file > locations for a range of partitions, and translate to PTransform reading it. -- This message was sent by Atlassian JIRA (v7.6.3#76005)