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conindid is the index supporting a constraint. We can use this not only for unique/primary-key constraints, but also foreign-key constraints, which depend on the unique index that constrains the referenced columns. tgconstrindid is just copied from the constraint's conindid field, or is zero for triggers not associated with constraints. This is mainly intended as infrastructure for upcoming patches, but it has some virtue in itself, since it exposes a relationship that you formerly had to grovel in pg_depend to determine. I simplified one information_schema view accordingly. (There is a pg_dump query that could also use conindid, but I left it alone because it wasn't clear it'd get any faster.) |
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| .. | ||
| alter.h | ||
| async.h | ||
| cluster.h | ||
| comment.h | ||
| conversioncmds.h | ||
| copy.h | ||
| dbcommands.h | ||
| defrem.h | ||
| discard.h | ||
| explain.h | ||
| lockcmds.h | ||
| portalcmds.h | ||
| prepare.h | ||
| proclang.h | ||
| schemacmds.h | ||
| sequence.h | ||
| tablecmds.h | ||
| tablespace.h | ||
| trigger.h | ||
| typecmds.h | ||
| user.h | ||
| vacuum.h | ||
| variable.h | ||
| version.h | ||
| view.h | ||