postgres

Author SHA1 Message Date

Author	SHA1	Message	Date
Robert Haas	890194f14d	Comment fixes related to logical decoding. Andres Freund, per complaints by Peter Eisentraut.	11 years ago
Tom Lane	ea177a3ba7	Remove unportable use of anonymous unions from reorderbuffer.h. In `b89e151054` I had assumed it was ok to use anonymous unions as struct members, but while a longstanding extension in many compilers, it's only been standardized in C11. To fix, remove one of the anonymous unions which tried to hide some implementation specific enum values and give the other a name. The latter unfortunately requires changes in output plugins, but since the feature has only been added a few days ago... Andres Freund	11 years ago
Robert Haas	b89e151054	Introduce logical decoding. This feature, building on previous commits, allows the write-ahead log stream to be decoded into a series of logical changes; that is, inserts, updates, and deletes and the transactions which contain them. It is capable of handling decoding even across changes to the schema of the effected tables. The output format is controlled by a so-called "output plugin"; an example is included. To make use of this in a real replication system, the output plugin will need to be modified to produce output in the format appropriate to that system, and to perform filtering. Currently, information can be extracted from the logical decoding system only via SQL; future commits will add the ability to stream changes via walsender. Andres Freund, with review and other contributions from many other people, including Álvaro Herrera, Abhijit Menon-Sen, Peter Gheogegan, Kevin Grittner, Robert Haas, Heikki Linnakangas, Fujii Masao, Abhijit Menon-Sen, Michael Paquier, Simon Riggs, Craig Ringer, and Steve Singer.	11 years ago

Robert Haas

Comment fixes related to logical decoding.

Andres Freund, per complaints by Peter Eisentraut.

11 years ago

Tom Lane

ea177a3ba7

Remove unportable use of anonymous unions from reorderbuffer.h.

In b89e151054 I had assumed it was ok to use anonymous unions as
struct members, but while a longstanding extension in many compilers,
it's only been standardized in C11.

To fix, remove one of the anonymous unions which tried to hide some
implementation specific enum values and give the other a name. The
latter unfortunately requires changes in output plugins, but since the
feature has only been added a few days ago...

Andres Freund

11 years ago

Robert Haas

b89e151054

Introduce logical decoding.

This feature, building on previous commits, allows the write-ahead log
stream to be decoded into a series of logical changes; that is,
inserts, updates, and deletes and the transactions which contain them.
It is capable of handling decoding even across changes to the schema
of the effected tables.  The output format is controlled by a
so-called "output plugin"; an example is included.  To make use of
this in a real replication system, the output plugin will need to be
modified to produce output in the format appropriate to that system,
and to perform filtering.

Currently, information can be extracted from the logical decoding
system only via SQL; future commits will add the ability to stream
changes via walsender.

Andres Freund, with review and other contributions from many other
people, including Álvaro Herrera, Abhijit Menon-Sen, Peter Gheogegan,
Kevin Grittner, Robert Haas, Heikki Linnakangas, Fujii Masao, Abhijit
Menon-Sen, Michael Paquier, Simon Riggs, Craig Ringer, and Steve
Singer.

11 years ago

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53 Commits (fa2e874946c5b9f23394358c131e987df7cc8ffb)