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Commitbd2ef63

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Move txid snapshot field description table from datatype to functions section.
1 parentf5f3753 commitbd2ef63

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2 files changed

+60
-78
lines changed

2 files changed

+60
-78
lines changed

‎doc/src/sgml/datatype.sgml

Lines changed: 1 addition & 72 deletions
Original file line numberDiff line numberDiff line change
@@ -1,4 +1,4 @@
1-
<!-- $PostgreSQL: pgsql/doc/src/sgml/datatype.sgml,v 1.213 2007/11/0514:51:08 momjian Exp $ -->
1+
<!-- $PostgreSQL: pgsql/doc/src/sgml/datatype.sgml,v 1.214 2007/11/0516:45:52 momjian Exp $ -->
22

33
<chapter id="datatype">
44
<title id="datatype-title">Data Types</title>
@@ -3437,77 +3437,6 @@ SELECT to_tsquery('Fat:ab & Cats');
34373437

34383438
</sect1>
34393439

3440-
<sect1 id="datatype-txid-snapshot">
3441-
<title>Transaction Snapshot Type</title>
3442-
3443-
<indexterm zone="datatype-txid-snapshot">
3444-
<primary>txid_snapshot</primary>
3445-
</indexterm>
3446-
3447-
<para>
3448-
The data type <type>txid_snapshot</type> stores info about transaction ID
3449-
visibility at a particular moment in time. The components are
3450-
described in <xref linkend="datatype-txid-snapshot-parts">.
3451-
</para>
3452-
3453-
<table id="datatype-txid-snapshot-parts">
3454-
<title>Snapshot components</title>
3455-
<tgroup cols="2">
3456-
<thead>
3457-
<row>
3458-
<entry>Name</entry>
3459-
<entry>Query Function</entry>
3460-
<entry>Description</entry>
3461-
</row>
3462-
</thead>
3463-
3464-
<tbody>
3465-
3466-
<row>
3467-
<entry><type>xmin</type></entry>
3468-
<entry>txid_snapshot_xmin()</entry>
3469-
<entry>
3470-
Earliest transaction ID that is still active. All earlier
3471-
transactions will either be committed and visible, or rolled
3472-
back and dead.
3473-
</entry>
3474-
</row>
3475-
3476-
<row>
3477-
<entry><type>xmax</type></entry>
3478-
<entry>txid_snapshot_xmax()</entry>
3479-
<entry>
3480-
Next unassigned txid. All txids later than this one are
3481-
unassigned, and thus invisible.
3482-
</entry>
3483-
</row>
3484-
3485-
<row>
3486-
<entry><type>xip_list</type></entry>
3487-
<entry>txid_snapshot_xip()</entry>
3488-
<entry>
3489-
Active txids at the time of snapshot. All of them are between
3490-
xmin and xmax. A txid that is <literal>xmin &lt;= txid &lt;
3491-
xmax</literal> and not in this list is visible.
3492-
</entry>
3493-
</row>
3494-
3495-
</tbody>
3496-
</tgroup>
3497-
</table>
3498-
3499-
<para>
3500-
Snapshot's textual representation is <literal>[xmin]:[xmax]:[xip_list]</literal>
3501-
for example <literal>10:20:10,14,15</literal> means
3502-
<literal>xmin=10 xmax=20 xip_list=10,14,15</literal>.
3503-
</para>
3504-
3505-
<para>
3506-
Functions for getting and querying transaction ids and snapshots are
3507-
described in <xref linkend="functions-txid">.
3508-
</para>
3509-
</sect1>
3510-
35113440
<sect1 id="datatype-uuid">
35123441
<title><acronym>UUID</acronym> Type</title>
35133442

‎doc/src/sgml/func.sgml

Lines changed: 59 additions & 6 deletions
Original file line numberDiff line numberDiff line change
@@ -1,4 +1,4 @@
1-
<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.407 2007/11/0514:51:08 momjian Exp $ -->
1+
<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.408 2007/11/0516:45:52 momjian Exp $ -->
22

33
<chapter id="functions">
44
<title>Functions and Operators</title>
@@ -11519,11 +11519,6 @@ SELECT pg_type_is_visible('myschema.widget'::regtype);
1151911519
<primary>txid_visible_in_snapshot</primary>
1152011520
</indexterm>
1152111521

11522-
<para>
11523-
The functions shown in <xref linkend="functions-txid-snapshot">
11524-
export server internal transaction info to user level.
11525-
</para>
11526-
1152711522
<table id="functions-txid-snapshot">
1152811523
<title>Transaction IDs and snapshots</title>
1152911524
<tgroup cols="3">
@@ -11575,6 +11570,64 @@ SELECT pg_type_is_visible('myschema.widget'::regtype);
1157511570
which transactions were committed between two snapshots.
1157611571
</para>
1157711572

11573+
<para>
11574+
The data type <type>txid_snapshot</type> stores info about transaction ID
11575+
visibility at a particular moment in time. The components are
11576+
described in <xref linkend="datatype-txid-snapshot-parts">.
11577+
</para>
11578+
11579+
<table id="datatype-txid-snapshot-parts">
11580+
<title>Snapshot components</title>
11581+
<tgroup cols="2">
11582+
<thead>
11583+
<row>
11584+
<entry>Name</entry>
11585+
<entry>Query Function</entry>
11586+
<entry>Description</entry>
11587+
</row>
11588+
</thead>
11589+
11590+
<tbody>
11591+
11592+
<row>
11593+
<entry><type>xmin</type></entry>
11594+
<entry>txid_snapshot_xmin()</entry>
11595+
<entry>
11596+
Earliest transaction ID that is still active. All earlier
11597+
transactions will either be committed and visible, or rolled
11598+
back and dead.
11599+
</entry>
11600+
</row>
11601+
11602+
<row>
11603+
<entry><type>xmax</type></entry>
11604+
<entry>txid_snapshot_xmax()</entry>
11605+
<entry>
11606+
Next unassigned txid. All txids later than this one are
11607+
unassigned, and thus invisible.
11608+
</entry>
11609+
</row>
11610+
11611+
<row>
11612+
<entry><type>xip_list</type></entry>
11613+
<entry>txid_snapshot_xip()</entry>
11614+
<entry>
11615+
Active txids at the time of snapshot. All of them are between
11616+
xmin and xmax. A txid that is <literal>xmin &lt;= txid &lt;
11617+
xmax</literal> and not in this list is visible.
11618+
</entry>
11619+
</row>
11620+
11621+
</tbody>
11622+
</tgroup>
11623+
</table>
11624+
11625+
<para>
11626+
Snapshot's textual representation is <literal>[xmin]:[xmax]:[xip_list]</literal>
11627+
for example <literal>10:20:10,14,15</literal> means
11628+
<literal>xmin=10 xmax=20 xip_list=10,14,15</literal>.
11629+
</para>
11630+
1157811631
</sect1>
1157911632

1158011633
<sect1 id="functions-admin">

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