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| author | Tomas Vondra <tomas.vondra@postgresql.org> | 2023-02-23 18:33:30 +0100 |
|---|---|---|
| committer | Tomas Vondra <tomas.vondra@postgresql.org> | 2023-02-23 18:33:40 +0100 |
| commit | e9960732a9618d5f744ff43a09622c9185798760 (patch) | |
| tree | b9ea6084bbbeb947cb1921a050dbe6c9fba4a51a /src/include/common/compression.h | |
| parent | 739f1d6218f5ce1e0243127ab23f431a7d07977c (diff) | |
| download | postgresql-e9960732a9618d5f744ff43a09622c9185798760.tar.gz postgresql-e9960732a9618d5f744ff43a09622c9185798760.zip | |
Introduce a generic pg_dump compression API
Switch pg_dump to use the Compression API, implemented by bf9aa490db.
The CompressFileHandle replaces the cfp* family of functions with a
struct of callbacks for accessing (compressed) files. This allows adding
new compression methods simply by introducing a new struct instance with
appropriate implementation of the callbacks.
Archives compressed using custom compression methods store an identifier
of the compression algorithm in their header instead of the compression
level. The header version is bumped.
Author: Georgios Kokolatos
Reviewed-by: Michael Paquier, Rachel Heaton, Justin Pryzby, Tomas Vondra
Discussion: https://postgr.es/m/faUNEOpts9vunEaLnmxmG-DldLSg_ql137OC3JYDmgrOMHm1RvvWY2IdBkv_CRxm5spCCb_OmKNk2T03TMm0fBEWveFF9wA1WizPuAgB7Ss%3D%40protonmail.com
Diffstat (limited to 'src/include/common/compression.h')
| -rw-r--r-- | src/include/common/compression.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/include/common/compression.h b/src/include/common/compression.h index 9a471e40aab..b48c173022e 100644 --- a/src/include/common/compression.h +++ b/src/include/common/compression.h @@ -14,6 +14,10 @@ #ifndef PG_COMPRESSION_H #define PG_COMPRESSION_H +/* + * These values are stored in disk, for example in files generated by pg_dump. + * Create the necessary backwards compatibility layers if their order changes. + */ typedef enum pg_compress_algorithm { PG_COMPRESSION_NONE, |