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doc: Improve tableoid description

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Mention that it's useful for determining table names for partitioned
tables as well as for those in inheritance hierarchies.

Author: Ian Lawrence Barwick <barwick@gmail.com>
Reviewed-by: Ashutosh Bapat <ashutosh.bapat.oss@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/CAB8KJ=gFmBXP=P9htziOj+WM5PDAK4qc7iGQta+8kUh306kQnw@mail.gmail.com
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Peter Eisentraut 2020-11-21 08:26:20 +01:00
parent c71f9a094b
commit a47834db0f
1 changed files with 2 additions and 1 deletions
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doc/src/sgml/ddl.sgml
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@ -1144,7 +1144,8 @@ CREATE TABLE circles (
<para>
The OID of the table containing this row. This column is
particularly handy for queries that select from inheritance
particularly handy for queries that select from partitioned
tables (see <xref linkend="ddl-partitioning"/>) or inheritance
hierarchies (see <xref linkend="ddl-inherit"/>), since without it,
it's difficult to tell which individual table a row came from. The
<structfield>tableoid</structfield> can be joined against the