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This allows clients to find out the setting at connection time without having to expend a query round trip to do so; which is helpful when trying to identify read/write servers. (One must also look at in_hot_standby, but that's already GUC_REPORT, cf bf8a662c9.) Modifying libpq to make use of this will come soon, but I felt it cleaner to push the server change separately. Haribabu Kommi, Greg Nancarrow, Vignesh C; reviewed at various times by Laurenz Albe, Takayuki Tsunakawa, Peter Smith. Discussion: https://postgr.es/m/CAF3+xM+8-ztOkaV9gHiJ3wfgENTq97QcjXQt+rbFQ6F7oNzt9A@mail.gmail.com |
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