hi.
src9=# select 'XLogRecPtr'::regtype;
ERROR: type "xlogrecptr" does not exist
LINE 1: select 'XLogRecPtr'::regtype;
^
so
+ <structfield>varcreate_lsn</structfield> <type>XLogRecPtr</type>
should be
<structfield>varcreate_lsn</structfield> <type>pg_lsn</type>
?
also
+ <row>
+ <entry role="catalog_table_entry"><para role="column_definition">
+ <structfield>varcreate_lsn</structfield> <type>XLogRecPtr</type>
+ </para>
+ <para>
+ LSN of the transaction where the variable was created.
+ <structfield>varcreate_lsn</structfield> and
+ <structfield>oid</structfield> together form the all-time unique
+ identifier (<structfield>oid</structfield> alone is not enough, since
+ object identifiers can get reused).
+ </para></entry>
+ </row>
+
we have "pg_variable_oid_index" PRIMARY KEY, btree (oid)
for table pg_variable.
so I am confused by saying the column "oid" itself is not enough to
prove unique.
in let.sgml
<term><literal>session_variable</literal></term>
should be
<term><replaceable class="parameter">session_variable</replaceable></term>
<term><literal>sql_expression</literal></term>
should be
<term><replaceable class="parameter">sql_expression</replaceable></term>
