allow to test whether a variable exists (2)

When Who What
2020-12-01 13:47:36 Anastasia Lubennikova (lubennikovaav) Closed in commitfest 2020-11 with status: Returned with feedback
2020-10-20 12:22:55 Ibrar Ahmed (ibrar) Posted review with messageid <160319657543.1204.12061000336482099590.pgcf@coridan.postgresql.org>
2020-10-20 12:22:55 Ibrar Ahmed (ibrar) New status: Waiting on Author
2020-10-20 12:21:16 Ibrar Ahmed (ibrar) Added ibrar as reviewer
2020-09-30 06:13:50 Michael Paquier (michael-kun) Closed in commitfest 2020-09 with status: Moved to next CF
2020-07-30 22:23:46 Daniel Gustafsson (d_gustafsson) Closed in commitfest 2020-07 with status: Moved to next CF
2020-04-13 08:01:07 Fabien Coelho (calvin) Added annotation "Initial CF entry: https://commitfest.postgresql.org/19/1528/" to alpine.DEB.2.20.1802191909500.21372@lancre
2020-04-13 07:58:36 Fabien Coelho (calvin) Changed authors to Fabien Coelho (calvin)
2020-04-13 07:58:25 Fabien Coelho (calvin) Attached mail thread alpine.DEB.2.20.1802191909500.21372@lancre
2020-04-13 07:58:25 Fabien Coelho (calvin) Created patch record