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doc: Improve documentation related to table partitioning feature.

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Commit f0e44751d7 implemented table
partitioning, but failed to mention the "no row movement"
restriction in the documentation.  Fix that and a few other issues.

Amit Langote, with some additional wordsmithing by me.
This commit is contained in:
Robert Haas
2016-12-13 08:18:00 -05:00
parent 3856cf9607
commit a1a4459c29
4 changed files with 34 additions and 14 deletions
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8
doc/src/sgml/ref/update.sgml
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@@ -279,6 +279,14 @@ UPDATE <replaceable class="parameter">count</replaceable>
sub-selects is safer, though often harder to read and slower than
using a join.
</para>
<para>
In the case of a partitioned table, updating a row might cause it to no
longer satisfy the partition constraint. Since there is no provision to
move the row to the partition appropriate to the new value of its
partitioning key, an error will occur in this case. This can also happen
when updating a partition directly.
</para>
</refsect1>
<refsect1>