Expand comment for isset_offset. This field was added in commit 0164a0f9ee to provide a way to determine whether a storage parameter was explicitly set for the relation or if it just picked up the default value. In most cases, this can be accomplished by giving the storage parameter a special out-of-range default value (e.g., the autovacuum_vacuum_insert_threshold storage parameter defaults to -2), but this approach doesn't work in all cases. For example, a Boolean storage parameter cannot be given an out-of-range default, so we need another way to discover the source of its value.
Reported-by: "David G. Johnston" <david.g.johns...@gmail.com> Reviewed-by: "David G. Johnston" <david.g.johns...@gmail.com> Discussion: https://postgr.es/m/CAKFQuwYKtEUYKS%2B18gRs-xPhn0qOJgM2KGyyWVCODHuVn9F-XQ%40mail.gmail.com Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/7d559c8580f722dc40f2c34573e53e33626679e0 Modified Files -------------- src/include/access/reloptions.h | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-)
