diff options
| -rw-r--r-- | doc/src/sgml/func.sgml | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml index 372cb036fde..f11c4f711d4 100644 --- a/doc/src/sgml/func.sgml +++ b/doc/src/sgml/func.sgml @@ -24641,6 +24641,34 @@ SELECT collation for ('foo' COLLATE "de_DE"); <row> <entry role="func_table_entry"><para role="func_signature"> <indexterm> + <primary>age</primary> + </indexterm> + <function>age</function> ( <type>xid</type> ) + <returnvalue>integer</returnvalue> + </para> + <para> + Returns the number of transactions between the supplied + transaction id and the current transaction counter. + </para></entry> + </row> + + <row> + <entry role="func_table_entry"><para role="func_signature"> + <indexterm> + <primary>mxid_age</primary> + </indexterm> + <function>mxid_age</function> ( <type>xid</type> ) + <returnvalue>integer</returnvalue> + </para> + <para> + Returns the number of multixacts IDs between the supplied + multixact ID and the current multixacts counter. + </para></entry> + </row> + + <row> + <entry role="func_table_entry"><para role="func_signature"> + <indexterm> <primary>pg_current_xact_id</primary> </indexterm> <function>pg_current_xact_id</function> () @@ -24773,7 +24801,8 @@ SELECT collation for ('foo' COLLATE "de_DE"); <para> The internal transaction ID type <type>xid</type> is 32 bits wide and wraps around every 4 billion transactions. However, - the functions shown in <xref linkend="functions-pg-snapshot"/> use a + the functions shown in <xref linkend="functions-pg-snapshot"/>, except + <function>age</function> and <function>mxid_age</function>, use a 64-bit type <type>xid8</type> that does not wrap around during the life of an installation, and can be converted to <type>xid</type> by casting if required. The data type <type>pg_snapshot</type> stores information about |