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Revert "Handle better implicit transaction state of pipeline mode"

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This reverts commit d77f91214f on all stable branches, due to concerns
regarding the compatility side effects this could create in a minor
release.  The change still exists on HEAD.

Discussion: https://postgr.es/m/CA+TgmoZqRgeFTg4+Yf_CMRRXiHuNz1u6ZC4FvVk+rxw0RmOPnw@mail.gmail.com
Backpatch-through: 13
This commit is contained in:
Michael Paquier
2024-11-28 09:43:22 +09:00
parent c26831e736
commit 76653134ae
4 changed files with 23 additions and 184 deletions
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21
doc/src/sgml/protocol.sgml
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@ -1070,17 +1070,16 @@ SELCT 1/0;<!-- this typo is intentional -->
<para>
If the client has not issued an explicit <command>BEGIN</command>,
then an implicit transaction block is started and each Sync ordinarily
causes an implicit <command>COMMIT</command> if the preceding step(s)
succeeded, or an implicit <command>ROLLBACK</command> if they failed.
This implicit transaction block will only be detected by the server
when the first command ends without a sync. There are a few DDL
commands (such as <command>CREATE DATABASE</command>) that cannot be
executed inside a transaction block. If one of these is executed in a
pipeline, it will fail unless it is the first command after a Sync.
Furthermore, upon success it will force an immediate commit to preserve
database consistency. Thus a Sync immediately following one of these
commands has no effect except to respond with ReadyForQuery.
then each Sync ordinarily causes an implicit <command>COMMIT</command>
if the preceding step(s) succeeded, or an
implicit <command>ROLLBACK</command> if they failed. However, there
are a few DDL commands (such as <command>CREATE DATABASE</command>)
that cannot be executed inside a transaction block. If one of
these is executed in a pipeline, it will fail unless it is the first
command in the pipeline. Furthermore, upon success it will force an
immediate commit to preserve database consistency. Thus a Sync
immediately following one of these commands has no effect except to
respond with ReadyForQuery.
</para>
<para>