Provide CQL queries in mappings

In the Pulsar topic mapping, you can optionally provide a CQL query that should run when the new record arrives on the Pulsar topic.

This feature is only meant for advanced use cases. Most often, you can use the standard Pulsar mapping without a query. If you define a query in the topic-to-table mapping, the query has priority and will be used instead of the automatically generated action.

If used, you must provide the bound variables used in the query in the mapping column. For example, give the following query:

topic:
  my_topic:
    my_ks:
      my_table:
        query: 'INSERT INTO %s.types (bigintCol, intCol) VALUES (:some_name, :some_name_2)'

The corresponding mapping in this example should be defined as:

topic:
  my_topic:
    my_ks:
      my_table:
        mapping: 'some_name=value.bigint, some_name_2=value.int'

Additional examples of CQL queries that you could include with the topic-to-table mapping:

topic:
  my_topic:
    my_ks:
      my_table:
        query: 'INSERT INTO ks.tbl(pkey,ccol,x) VALUES :pkey, :ccol, :x);'
        query: 'INSERT INTO ks.tbl(pkey,ccol,x) VALUES (:pkey, :ccol, :x) USING TTL :input_ttl'
        query: 'INSERT INTO ks.tbl(pkey,ccol,x) VALUES (:pkey, :ccol, :x) USING TIMESTAMP :input_ts'
        query: 'UPDATE ks.tbl SET somelist = somelist + [:newitem] WHERE pkey = :pkey'
        query: 'DELETE FROM ks.tbl WHERE pkey = :pkey AND ccol = :ccol;'
        query: 'DELETE FROM ks.tbl WHERE pkey = :pkey AND ccol > :ccol1 AND ccol <= :ccol2;'

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