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Doc: add an example of a self-referential foreign key to ddl.sgml.
authorTom Lane <tgl@sss.pgh.pa.us>
Fri, 30 Apr 2021 19:37:57 +0000 (15:37 -0400)
committerTom Lane <tgl@sss.pgh.pa.us>
Fri, 30 Apr 2021 19:37:57 +0000 (15:37 -0400)
commit7dcec3ed45d5a128fcc8bce23b9a2879fc520aa0
tree7525993ef4007b5ad97cc3a17aad143f28da5abftree | snapshot
parent49172d88f9d03d063e680e45fc51dffea218add1commit | diff
Doc: add an example of a self-referential foreign key to ddl.sgml.

While we've always allowed such cases, the documentation didn't
say you could do it.

Discussion: https://postgr.es/m/161969805833.690.13680986983883602407@wrigleys.postgresql.org
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