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Document the way partition MERGE/SPLIT operations create new partitions
2024年4月30日 08:54:56 +0000 (11:54 +0300)
2024年4月30日 08:54:56 +0000 (11:54 +0300)
Reported-by: Justin Pryzby
Discussion: https://postgr.es/m/ZilrByTp-pbz6Mvf%40pryzbyj2023
Reviewed-by: Justin Pryzby

diff --git a/doc/src/sgml/ref/alter_table.sgml b/doc/src/sgml/ref/alter_table.sgml
index fe36ff82e527f6c5b3a2ba407f1f989bbc6882a3..fc2dfffe49f6f8bdafecac55c276dd538f2eaff1 100644 (file)
--- a/doc/src/sgml/ref/alter_table.sgml
+++ b/doc/src/sgml/ref/alter_table.sgml
@@ -1153,6 +1153,12 @@ WITH ( MODULUS <replaceable class="parameter">numeric_literal</replaceable>, REM
splitting we have a partition with the same name).
Only simple, non-partitioned partition can be split.
</para>
+ <para>
+ The new partitions will be created the same as tables created with the
+ SQL command <literal>CREATE TABLE <replaceable class="parameter">partition_nameN</replaceable> (LIKE <replaceable class="parameter">name</replaceable> INCLUDING ALL EXCLUDING INDEXES EXCLUDING IDENTITY)</literal>.
+ The indexes and identity are created later, after moving the data
+ into the new partitions.
+ </para>
<note>
<para>
This command acquires an <literal>ACCESS EXCLUSIVE</literal> lock.
@@ -1213,6 +1219,12 @@ WITH ( MODULUS <replaceable class="parameter">numeric_literal</replaceable>, REM
can have the same name as one of the merged partitions. Only simple,
non-partitioned partitions can be merged.
</para>
+ <para>
+ The new partition will be created the same as a table created with the
+ SQL command <literal>CREATE TABLE <replaceable class="parameter">partition_name</replaceable> (LIKE <replaceable class="parameter">name</replaceable> INCLUDING ALL EXCLUDING INDEXES EXCLUDING IDENTITY)</literal>.
+ The indexes and identity are created later, after moving the data
+ into the new partition.
+ </para>
<note>
<para>
This command acquires an <literal>ACCESS EXCLUSIVE</literal> lock.
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