From 0338de62cd955b98244b5b624a2bcb7af76465b0 Mon Sep 17 00:00:00 2001
From: Peter Eisentraut <peter@eisentraut.org>
Date: Tue, 7 Dec 2021 15:29:51 +0100
Subject: [PATCH 3/4] Some documentation updates

---
 doc/src/sgml/logicaldecoding.sgml | 54 +++++++++++++++++++++++++++++--
 1 file changed, 51 insertions(+), 3 deletions(-)

diff --git a/doc/src/sgml/logicaldecoding.sgml b/doc/src/sgml/logicaldecoding.sgml
index b6353c7a12..eea4f3cd50 100644
--- a/doc/src/sgml/logicaldecoding.sgml
+++ b/doc/src/sgml/logicaldecoding.sgml
@@ -458,6 +458,7 @@ <title>Initialization Function</title>
     LogicalDecodeTruncateCB truncate_cb;
     LogicalDecodeCommitCB commit_cb;
     LogicalDecodeMessageCB message_cb;
+    LogicalDecodeSequenceCB sequence_cb;
     LogicalDecodeFilterByOriginCB filter_by_origin_cb;
     LogicalDecodeShutdownCB shutdown_cb;
     LogicalDecodeFilterPrepareCB filter_prepare_cb;
@@ -472,6 +473,7 @@ <title>Initialization Function</title>
     LogicalDecodeStreamCommitCB stream_commit_cb;
     LogicalDecodeStreamChangeCB stream_change_cb;
     LogicalDecodeStreamMessageCB stream_message_cb;
+    LogicalDecodeStreamSequenceCB stream_sequence_cb;
     LogicalDecodeStreamTruncateCB stream_truncate_cb;
 } OutputPluginCallbacks;
 
@@ -481,9 +483,12 @@ <title>Initialization Function</title>
      and <function>commit_cb</function> callbacks are required,
      while <function>startup_cb</function>,
      <function>filter_by_origin_cb</function>, <function>truncate_cb</function>,
+     <function>sequence_cb</function>,
      and <function>shutdown_cb</function> are optional.
      If <function>truncate_cb</function> is not set but a
      <command>TRUNCATE</command> is to be decoded, the action will be ignored.
+     Similarly, if <function>sequence_cb</function> is not set and a sequence
+     change is to be decoded, the action will be ignored.
     </para>
 
     <para>
@@ -492,7 +497,7 @@ <title>Initialization Function</title>
      <function>stream_stop_cb</function>, <function>stream_abort_cb</function>,
      <function>stream_commit_cb</function>, <function>stream_change_cb</function>,
      and <function>stream_prepare_cb</function>
-     are required, while <function>stream_message_cb</function> and
+     are required, while <function>stream_message_cb</function>, <function>stream_sequence_cb</function>, and
      <function>stream_truncate_cb</function> are optional.
     </para>
 
@@ -808,6 +813,27 @@ <title>Generic Message Callback</title>
      </para>
     </sect3>
 
+    <sect3 id="logicaldecoding-output-plugin-sequence">
+     <title>Sequence Callback</title>
+
+     <para>
+      The <function>sequence_cb</function> callback is called for actions that
+      change a sequence.
+<programlisting>
+typedef void (*LogicalDecodeSequenceCB) (struct LogicalDecodingContext *ctx,
+                                         ReorderBufferTXN *txn,
+                                         XLogRecPtr sequence_lsn,
+                                         Relation rel,
+                                         bool transactional,
+                                         bool created,
+                                         int64 last_value,
+                                         int64 log_cnt,
+                                         bool is_called);
+</programlisting>
+      TODO
+     </para>
+    </sect3>
+
     <sect3 id="logicaldecoding-output-plugin-filter-prepare">
      <title>Prepare Filter Callback</title>
 
@@ -1017,6 +1043,28 @@ <title>Stream Message Callback</title>
      </para>
     </sect3>
 
+    <sect3 id="logicaldecoding-output-plugin-stream-sequence">
+     <title>Stream Sequence Callback</title>
+     <para>
+      The <function>stream_sequence_cb</function> callback is called for
+      actions that change a sequence in a block of streamed changes
+      (demarcated by <function>stream_start_cb</function> and
+      <function>stream_stop_cb</function> calls).
+<programlisting>
+typedef void (*LogicalDecodeStreamSequenceCB) (struct LogicalDecodingContext *ctx,
+                                               ReorderBufferTXN *txn,
+                                               XLogRecPtr sequence_lsn,
+                                               Relation rel,
+                                               bool transactional,
+                                               bool created,
+                                               int64 last_value,
+                                               int64 log_cnt,
+                                               bool is_called);
+</programlisting>
+      TODO
+     </para>
+    </sect3>
+
     <sect3 id="logicaldecoding-output-plugin-stream-truncate">
      <title>Stream Truncate Callback</title>
      <para>
@@ -1197,8 +1245,8 @@ <title>Streaming of Large Transactions for Logical Decoding</title>
     in-progress transactions. There are multiple required streaming callbacks
     (<function>stream_start_cb</function>, <function>stream_stop_cb</function>,
     <function>stream_abort_cb</function>, <function>stream_commit_cb</function>
-    and <function>stream_change_cb</function>) and two optional callbacks
-    (<function>stream_message_cb</function> and <function>stream_truncate_cb</function>).
+    and <function>stream_change_cb</function>) and multiple optional callbacks
+    (<function>stream_message_cb</function>, <function>stream_sequence_cb</function>, and <function>stream_truncate_cb</function>).
     Also, if streaming of two-phase commands is to be supported, then additional
     callbacks must be provided. (See <xref linkend="logicaldecoding-two-phase-commits"/>
     for details).
-- 
2.34.1