Обсуждение: pgsql: Support ALTER SYSTEM RESET command.

Support ALTER SYSTEM RESET command.

This patch allows us to execute ALTER SYSTEM RESET command to
remove the configuration entry from postgresql.auto.conf.

Vik Fearing, reviewed by Amit Kapila and me.

Branch
------
master

Details
-------
http://git.postgresql.org/pg/commitdiff/bd3b7a9eef6fd8d71ad9aa5eaf1f90e904e96f0b

Modified Files
--------------
doc/src/sgml/ref/alter_system.sgml |   13 +++--
src/backend/parser/gram.y          |   47 +++++++++++------
src/backend/utils/misc/guc.c       |   98 ++++++++++++++++++++++--------------
src/bin/psql/tab-complete.c        |   19 +++++--
4 files changed, 115 insertions(+), 62 deletions(-)