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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> <para>
The OID of the table containing this row. This column is 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, hierarchies (see <xref linkend="ddl-inherit"/>), since without it,
it's difficult to tell which individual table a row came from. The it's difficult to tell which individual table a row came from. The
<structfield>tableoid</structfield> can be joined against the <structfield>tableoid</structfield> can be joined against the