The pg_compression system catalog table describes the compression methods available.

    columntypemodifersstoragedescription
    compnamenamenot nullplainName of the compression
    compconstructorregprocnot nullplainName of compression constructor
    compdestructorregprocnot nullplainName of compression destructor
    compcompressorregprocnot nullplainName of the compressor
    compdecompressorregprocnot nullplainName of the decompressor
    compvalidatorregprocnot nullplainName of the compression validator
    compowneroidnot nullplainoid from pg_authid

    Parent topic: System Catalogs Definitions