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Commitc862299

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Document lock obtained during partition detach
On partition detach, we acquire a SHARE lock on all tables thatreference the partitioned table that we're detaching a partition from,but failed to document this fact. My oversight in commitf56f8f8.Repair. Backpatch to 12.Author: Álvaro Herrera <alvherre@alvh.no-ip.org>Discussion:https://postgr.es/m/20210325180244.GA12738@alvherre.pgsql
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‎doc/src/sgml/ref/alter_table.sgml

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@@ -946,6 +946,8 @@ WITH ( MODULUS <replaceable class="parameter">numeric_literal</replaceable>, REM
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ties to the table from which it was detached. Any indexes that were
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attached to the target table's indexes are detached. Any triggers that
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were created as clones of those in the target table are removed.
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<literal>SHARE</literal> lock is obtained on any tables that reference
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this partitioned table in foreign key constraints.
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</para>
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</listitem>
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</varlistentry>

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