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doc: add transaction processing chapter with internals info

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This also adds references to this new chapter at relevant sections of
our documentation.  Previously much of these internal details were
exposed to users, but not explained.  This also updates RELEASE
SAVEPOINT.

Discussion: https://postgr.es/m/CANbhV-E_iy9fmrErxrCh8TZTyenpfo72Hf_XD2HLDppva4dUNA@mail.gmail.com

Author: Simon Riggs, Laurenz Albe

Reviewed-by: Bruce Momjian

Backpatch-through: 11
This commit is contained in:
Bruce Momjian
2022-11-29 20:49:52 -05:00
parent d18655cc03
commit 66bc9d2d3e
14 changed files with 292 additions and 44 deletions
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7
doc/src/sgml/system-views.sgml
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@@ -1434,7 +1434,8 @@
</para>
<para>
Virtual ID of the transaction targeted by the lock,
or null if the target is not a virtual transaction ID
or null if the target is not a virtual transaction ID; see
<xref linkend="transactions"/>
</para></entry>
</row>
@@ -1443,8 +1444,8 @@
<structfield>transactionid</structfield> <type>xid</type>
</para>
<para>
ID of the transaction targeted by the lock,
or null if the target is not a transaction ID
ID of the transaction targeted by the lock, or null if the target
is not a transaction ID; <xref linkend="transactions"/>
</para></entry>
</row>