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-rw-r--r--doc/src/sgml/fdwhandler.sgml15
-rw-r--r--doc/src/sgml/release-11.sgml3
2 files changed, 18 insertions, 0 deletions
diff --git a/doc/src/sgml/fdwhandler.sgml b/doc/src/sgml/fdwhandler.sgml
index 7b758bdf09b..f719b06664b 100644
--- a/doc/src/sgml/fdwhandler.sgml
+++ b/doc/src/sgml/fdwhandler.sgml
@@ -588,6 +588,14 @@ ExecForeignInsert(EState *estate,
</para>
<para>
+ Note that this function is also called when inserting routed tuples into
+ a foreign-table partition or executing <command>COPY FROM</command> on
+ a foreign table, in which case it is called in a different way than it
+ is in the <command>INSERT</command> case. See the callback functions
+ described below that allow the FDW to support that.
+ </para>
+
+ <para>
<programlisting>
TupleTableSlot *
ExecForeignUpdate(EState *estate,
@@ -744,6 +752,13 @@ BeginForeignInsert(ModifyTableState *mtstate,
</para>
<para>
+ Note that if the FDW does not support routable foreign-table partitions
+ and/or executing <command>COPY FROM</command> on foreign tables, this
+ function or <function>ExecForeignInsert</function> subsequently called
+ must throw error as needed.
+ </para>
+
+ <para>
<programlisting>
void
EndForeignInsert(EState *estate,
diff --git a/doc/src/sgml/release-11.sgml b/doc/src/sgml/release-11.sgml
index 14e2726f0c1..5c9f41a17aa 100644
--- a/doc/src/sgml/release-11.sgml
+++ b/doc/src/sgml/release-11.sgml
@@ -2594,6 +2594,9 @@ Branch: REL9_3_STABLE [84261eb10] 2018-10-19 17:02:26 -0400
<para>
This is supported by <filename>postgres_fdw</filename>
foreign tables.
+ Since the <function>ExecForeignInsert</function> callback function
+ is called for this in a different way than it used to be,
+ foreign data wrappers must be modified to cope with this change.
</para>
</listitem>