postgres_fdw: Allow postgres_fdw.application_name to include escape sequences.
application_name that used when postgres_fdw establishes a connection to a foreign server can be specified in either or both a connection parameter of a server object and GUC postgres_fdw.application_name. This commit allows those parameters to include escape sequences that begins with % character. Then postgres_fdw replaces those escape sequences with status information. For example, %d and %u are replaced with user name and database name in local server, respectively. This feature enables us to add information more easily to track remote transactions or queries, into application_name of a remote connection. Author: Hayato Kuroda Reviewed-by: Kyotaro Horiguchi, Masahiro Ikeda, Hou Zhijie, Fujii Masao Discussion: https://postgr.es/m/tyapr01mb5866fae71c66547c64616584f5...@tyapr01mb5866.jpnprd01.prod.outlook.com Discussion: https://postgr.es/m/tycpr01mb5870d1e8b949daf6d3b84e02f5...@tycpr01mb5870.jpnprd01.prod.outlook.com Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/6e0cb3dec10e460288d68a128e3d79d16a230cdb Modified Files -------------- contrib/postgres_fdw/connection.c | 36 ++++++++++++++ contrib/postgres_fdw/expected/postgres_fdw.out | 32 ++++++++++++ contrib/postgres_fdw/option.c | 62 ++++++++++++++++++++++++ contrib/postgres_fdw/postgres_fdw.h | 1 + contrib/postgres_fdw/sql/postgres_fdw.sql | 21 ++++++++ doc/src/sgml/postgres-fdw.sgml | 67 +++++++++++++++++++++++++- 6 files changed, 218 insertions(+), 1 deletion(-)
