On Sat, 2025-07-26 at 15:13 -0400, Igor Korot wrote: > On Sat, Jul 26, 2025, 2:14 PM Christophe Pettus <xof@xxxxxxxxxxxx> wrote: > > > I want to know all individual things: > > > - whether the index is unique. > > > - what type of index it is > > > - whether the field is ASC or DESC. > > > - all other individual arams > > > > pg_index is the source for those. The one exception is the access method for the index, which is in pg_class. > > I didn't find the sorting for the field. That's in pg_index.indoption. The flags stored there are defined in src/include/catalog/pg_index.h /* * Index AMs that support ordered scans must support these two indoption * bits. Otherwise, the content of the per-column indoption fields is * open for future definition. */ #define INDOPTION_DESC 0x0001 /* values are in reverse order */ #define INDOPTION_NULLS_FIRST 0x0002 /* NULLs are first instead of last */ So a value of 3 would mean DESC NULLS FIRST. Yours, Laurenz Albe
