pg_compression
The pg_compression system catalog table describes the compression methods available..
| column | type | modifers | storage | description |
|---|---|---|---|---|
| compname | name | not null | plain | Name of the compression |
| compconstructor | regproc | not null | plain | Name of compression constructor |
| compdestructor | regproc | not null | plain | Name of compression destructor |
| compcompressor | regproc | not null | plain | Name of the compressor |
| compdecompressor | regproc | not null | plain | Name of the decompressor |
| compvalidator | regproc | not null | plain | Name of the compression validator |
| compowner | oid | not null | plain | oid from pg_authid |