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Alvaro Herrera b488c580ae Allow on-the-fly capture of DDL event details ... This feature lets user code inspect and take action on DDL events. Whenever a ddl_command_end event trigger is installed, DDL actions executed are saved to a list which can be inspected during execution of a function attached to ddl_command_end. The set-returning function pg_event_trigger_ddl_commands can be used to list actions so captured; it returns data about the type of command executed, as well as the affected object. This is sufficient for many uses of this feature. For the cases where it is not, we also provide a "command" column of a new pseudo-type pg_ddl_command, which is a pointer to a C structure that can be accessed by C code. The struct contains all the info necessary to completely inspect and even reconstruct the executed command. There is no actual deparse code here; that's expected to come later. What we have is enough infrastructure that the deparsing can be done in an external extension. The intention is that we will add some deparsing code in a later release, as an in-core extension. A new test module is included. It's probably insufficient as is, but it should be sufficient as a starting point for a more complete and future-proof approach. Authors: Álvaro Herrera, with some help from Andres Freund, Ian Barwick, Abhijit Menon-Sen. Reviews by Andres Freund, Robert Haas, Amit Kapila, Michael Paquier, Craig Ringer, David Steele. Additional input from Chris Browne, Dimitri Fontaine, Stephen Frost, Petr Jelínek, Tom Lane, Jim Nasby, Steven Singer, Pavel Stěhule. Based on original work by Dimitri Fontaine, though I didn't use his code. Discussion: https://www.postgresql.org/message-id/m2txrsdzxa.fsf@2ndQuadrant.fr https://www.postgresql.org/message-id/20131108153322.GU5809@eldon.alvh.no-ip.org https://www.postgresql.org/message-id/20150215044814.GL3391@alvh.no-ip.org		11 years ago
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backend	Allow on-the-fly capture of DDL event details	11 years ago
bin	pg_upgrade: use single or double-quotes in command-line strings	11 years ago
common	Reorganize our CRC source files again.	11 years ago
include	Allow on-the-fly capture of DDL event details	11 years ago
interfaces	Fix parallel make risk with new check temp-install setup	11 years ago
makefiles	Fix parallel make risk with new check temp-install setup	11 years ago
pl	Fix python_includespec on Windows at configure time	11 years ago
port	Fix various typos and grammar errors in comments.	11 years ago
template	Remove duplicate specification of -Ae for HP-UX C compiler.	11 years ago
test	Allow on-the-fly capture of DDL event details	11 years ago
timezone	Update time zone data files to tzdata release 2015a.	11 years ago
tools	Enable transforms tests for python 2 on MSVC builds	11 years ago
tutorial	Update copyright for 2015	11 years ago
.gitignore	…
DEVELOPERS	…
Makefile	…
Makefile.global.in	Move interpreter shared library detection to configure	11 years ago
Makefile.shlib	Add transforms feature	11 years ago
bcc32.mak	…
nls-global.mk	Setup error context callback for transaction lock waits	12 years ago
win32.mak	…