external/postgres-decoderbufs
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Fixing type lookups for PostGIS types, some memory allocation, etc.

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Xavier Stevens
2015-02-11 11:48:42 -08:00
parent 744b29fa7d
commit 5b7a88438e
4 changed files with 65 additions and 57 deletions
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README.md
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@@ -22,12 +22,13 @@ project and blog posts as a guide to teach myself how to write a PostgreSQL logi
This code is built with the following assumptions. You may get mixed results if you deviate from these versions.
* [PostgreSQL](http://www.postgresql.org) 9.4+
* [Protocol Buffers](https://developers.google.com/protocol-buffers) 2.5.0
* [protobuf-c](https://github.com/protobuf-c/protobuf-c) 1.0.2
* [Protocol Buffers](https://developers.google.com/protocol-buffers) 2.6.1
* [protobuf-c](https://github.com/protobuf-c/protobuf-c) 1.1.0
* [PostGIS](http://postgis.net) 2.1.x
### Requirements
* PostgreSQL
* PostGIS
* Protocol Buffers
* protobuf-c
@@ -86,7 +87,35 @@ The binary format uses simple frame encoding, which uses an 8-byte length (uint6
pg_recvlogical -h localhost -d <yourdb> -U <youruser> -w -S decoderbufs_demo -P decoderbufs -f decoderbuf.frames -s 1 -F 1 --start
For something a bit more useful, I am looking to implement a custom PostgreSQL logical replication client that publishes to something like Apache Kafka.
### Type Mappings
The following table shows how current PostgreSQL type OIDs are mapped to which decoderbuf fields:
| PostgreSQL Type OID | Decoderbuf Field |
|---------------------|---------------|
| BOOLOID | datum_boolean |
| INT2OID | datum_int32 |
| INT4OID | datum_int32 |
| INT8OID | datum_int64 |
| OIDOID | datum_int64 |
| FLOAT4OID | datum_float |
| FLOAT8OID | datum_double |
| NUMERICOID | datum_double |
| CHAROID | datum_string |
| VARCHAROID | datum_string |
| BPCHAROID | datum_string |
| TEXTOID | datum_string |
| JSONOID | datum_string |
| XMLOID | datum_string |
| UUIDOID | datum_string |
| TIMESTAMPOID | datum_string |
| TIMESTAMPTZOID | datum_string |
| BYTEAOID | datum_bytes |
| POINTOID | datum_point |
| PostGIS geometry | datum_point |
| PostGIS geography | datum_point |
### Support
File bug reports, feature requests and questions using