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Commit2d1018c

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Improve ALTER TABLE documentation
The ALTER TABLE documentation wasn't terribly clear when it came towhich commands could be combined together and what it meant when theywere.In particular, SET TABLESPACE *can* be combined with other commands,when it's operating against a single table, but not when multiple tablesare being moved with ALL IN TABLESPACE. Further, the actions areapplied together but not really in 'parallel', at least today.Pointed out by: Amit LangoteImproved wording from Tom.Back-patch to 9.4, where the ALL IN TABLESPACE option was added.Discussion:https://www.postgresql.org/message-id/14c535b4-13ef-0590-1b98-76af355a0763%40lab.ntt.co.jp
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‎doc/src/sgml/ref/alter_table.sgml

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@@ -767,11 +767,11 @@ ALTER TABLE [ IF EXISTS ] <replaceable class="PARAMETER">name</replaceable>
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</para>
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<para>
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All theactions except <literal>RENAME</literal>,
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<literal>SET TABLESPACE</literal>, <literal>SET SCHEMA</literal>,
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All theforms of ALTER TABLE that act on a single table, except
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<literal>RENAME</literal>, <literal>SET SCHEMA</literal>,
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<literal>ATTACH PARTITION</literal>, and
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<literal>DETACH PARTITION</literal> can be combined into
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a list of multiple alterations toapply in parallel. For example, it
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a list of multiple alterations tobe applied together. For example, it
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is possible to add several columns and/or alter the type of several
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columns in a single command. This is particularly useful with large
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tables, since only one pass over the table need be made.

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