Kafka Foreign Data Wrapper for PostgreSQL

Copyright (c) 2015, Jony Vesterman Cohen.

The Kafka Foreign Data Wrapper (FDW) for PostgreSQL allows to consume and produce KAFKA messages as PostgreSQL tables.

kafka topic == foreign table. consume == select produce == insert

The FDW uses the librdkafka C client library. https://github.com/edenhill/librdkafka librdkafka is licensed under the 2-clause BSD license.

This FDW allows:

1. importing topics as foreign tables (by import schema)
2. consuming topics using select statments.
3. producing using insert statments.

CSV format - limitation: must end with ','

table options allows to control the offset by setting offset to be one of 2 options:

• beginning: RD_KAFKA_OFFSET_BEGINNING
• stored: RD_KAFKA_OFFSET_STORED

TODO List:

1. consider moving to : rd_kafka_consume_callback for higher throughput
2. look at: https://github.com/edenhill/librdkafka/blob/master/examples/rdkafka_performance.c from line 1180
3. move the topic and kafka client to sheared state to reduce initialization time.
4. allow for costume message decoders/encoders
5. completly map topic configuration with table options.