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Diffstat (limited to 'doc/FAQ')
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1 files changed, 6 insertions, 6 deletions
@@ -1,7 +1,7 @@ Frequently Asked Questions (FAQ) for PostgreSQL - Last updated: Tue Nov 21 10:37:54 EST 2006 + Last updated: Tue Nov 21 23:16:54 EST 2006 Current maintainer: Bruce Momjian (bruce@momjian.us) @@ -728,11 +728,11 @@ 4.12) What is an OID? What is a CTID? - Every row that is created in PostgreSQL gets a unique OID unless - created WITHOUT OIDS. OIDs are automatically assigned unique 4-byte - integers that are unique across the entire installation. However, they - overflow at 4 billion, and then the OIDs start being duplicated. - PostgreSQL uses OIDs to link its internal system tables together. + If a table is created WITH OIDS, each row gets a unique a OID. OIDs + are automatically assigned unique 4-byte integers that are unique + across the entire installation. However, they overflow at 4 billion, + and then the OIDs start being duplicated. PostgreSQL uses OIDs to link + its internal system tables together. To uniquely number rows in user tables, it is best to use SERIAL rather than OIDs because SERIAL sequences are unique only within a |