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Postgres FD Implementation
Commit f2a8aa0f authored by Neil Conway's avatar Neil Conway
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Reorder the entries in the function section of the manual, to ensure they 

are alphabetically ordered. I believe the tables were correctly ordered in
the past, but some of them had subsequently regressed.
parent fad1ea86
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doc/src/sgml/func.sgml
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<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.325 2006/07/11 19:11:26 neilc Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.326 2006/07/13 23:59:47 neilc Exp $ -->
<chapter id="functions">
<title>Functions and Operators</title>
......@@ -2375,6 +2375,32 @@
<entry><literal>\\Post'gres\000</literal></entry>
</row>
<row>
<entry><function>get_bit</function>(<parameter>string</parameter>, <parameter>offset</parameter>)</entry>
<entry><type>int</type></entry>
<entry>
Extract bit from string
<indexterm>
<primary>get_bit</primary>
</indexterm>
</entry>
<entry><literal>get_bit('Th\\000omas'::bytea, 45)</literal></entry>
<entry><literal>1</literal></entry>
</row>
<row>
<entry><function>get_byte</function>(<parameter>string</parameter>, <parameter>offset</parameter>)</entry>
<entry><type>int</type></entry>
<entry>
Extract byte from string
<indexterm>
<primary>get_byte</primary>
</indexterm>
</entry>
<entry><literal>get_byte('Th\\000omas'::bytea, 4)</literal></entry>
<entry><literal>109</literal></entry>
</row>
<row>
<entry><literal><function>octet_length</function>(<parameter>string</parameter>)</literal></entry>
<entry><type>int</type></entry>
......@@ -2392,45 +2418,17 @@
</row>
<row>
<entry><literal><function>substring</function>(<parameter>string</parameter> <optional>from <type>int</type></optional> <optional>for <type>int</type></optional>)</literal></entry>
<entry><type>bytea</type></entry>
<entry>
Extract substring
<indexterm>
<primary>substring</primary>
</indexterm>
</entry>
<entry><literal>substring('Th\\000omas'::bytea from 2 for 3)</literal></entry>
<entry><literal>h\000o</literal></entry>
</row>
<row>
<entry>
<literal><function>trim</function>(<optional>both</optional>
<parameter>bytes</parameter> from
<parameter>string</parameter>)</literal>
</entry>
<entry><function>set_bit</function>(<parameter>string</parameter>,
<parameter>offset</parameter>, <parameter>newvalue</>)</entry>
<entry><type>bytea</type></entry>
<entry>
Remove the longest string containing only the bytes in
<parameter>bytes</parameter> from the start
and end of <parameter>string</parameter>
</entry>
<entry><literal>trim('\\000'::bytea from '\\000Tom\\000'::bytea)</literal></entry>
<entry><literal>Tom</literal></entry>
</row>
<row>
<entry><function>get_byte</function>(<parameter>string</parameter>, <parameter>offset</parameter>)</entry>
<entry><type>int</type></entry>
<entry>
Extract byte from string
Set bit in string
<indexterm>
<primary>get_byte</primary>
<primary>set_bit</primary>
</indexterm>
</entry>
<entry><literal>get_byte('Th\\000omas'::bytea, 4)</literal></entry>
<entry><literal>109</literal></entry>
<entry><literal>set_bit('Th\\000omas'::bytea, 45, 0)</literal></entry>
<entry><literal>Th\000omAs</literal></entry>
</row>
<row>
......@@ -2448,30 +2446,32 @@
</row>
<row>
<entry><function>get_bit</function>(<parameter>string</parameter>, <parameter>offset</parameter>)</entry>
<entry><type>int</type></entry>
<entry><literal><function>substring</function>(<parameter>string</parameter> <optional>from <type>int</type></optional> <optional>for <type>int</type></optional>)</literal></entry>
<entry><type>bytea</type></entry>
<entry>
Extract bit from string
Extract substring
<indexterm>
<primary>get_bit</primary>
<primary>substring</primary>
</indexterm>
</entry>
<entry><literal>get_bit('Th\\000omas'::bytea, 45)</literal></entry>
<entry><literal>1</literal></entry>
<entry><literal>substring('Th\\000omas'::bytea from 2 for 3)</literal></entry>
<entry><literal>h\000o</literal></entry>
</row>
<row>
<entry><function>set_bit</function>(<parameter>string</parameter>,
<parameter>offset</parameter>, <parameter>newvalue</>)</entry>
<entry>
<literal><function>trim</function>(<optional>both</optional>
<parameter>bytes</parameter> from
<parameter>string</parameter>)</literal>
</entry>
<entry><type>bytea</type></entry>
<entry>
Set bit in string
<indexterm>
<primary>set_bit</primary>
</indexterm>
Remove the longest string containing only the bytes in
<parameter>bytes</parameter> from the start
and end of <parameter>string</parameter>
</entry>
<entry><literal>set_bit('Th\\000omas'::bytea, 45, 0)</literal></entry>
<entry><literal>Th\000omAs</literal></entry>
<entry><literal>trim('\\000'::bytea from '\\000Tom\\000'::bytea)</literal></entry>
<entry><literal>Tom</literal></entry>
</row>
</tbody>
</tgroup>
......@@ -2512,6 +2512,34 @@
<entry><literal>trim</literal></entry>
</row>
<row>
<entry>
<literal><function>decode</function>(<parameter>string</parameter> <type>text</type>,
<parameter>type</parameter> <type>text</type>)</literal>
</entry>
<entry><type>bytea</type></entry>
<entry>
Decode binary string from <parameter>string</parameter> previously
encoded with <function>encode</>. Parameter type is same as in <function>encode</>.
</entry>
<entry><literal>decode('123\\000456', 'escape')</literal></entry>
<entry><literal>123\000456</literal></entry>
</row>
<row>
<entry>
<literal><function>encode</function>(<parameter>string</parameter> <type>bytea</type>,
<parameter>type</parameter> <type>text</type>)</literal>
</entry>
<entry><type>text</type></entry>
<entry>
Encode binary string to <acronym>ASCII</acronym>-only representation. Supported
types are: <literal>base64</>, <literal>hex</>, <literal>escape</>.
</entry>
<entry><literal>encode('123\\000456'::bytea, 'escape')</literal></entry>
<entry><literal>123\000456</literal></entry>
</row>
<row>
<entry><literal><function>length</function>(<parameter>string</parameter>)</literal></entry>
<entry><type>int</type></entry>
......@@ -2541,35 +2569,6 @@
<entry><literal>md5('Th\\000omas'::bytea)</literal></entry>
<entry><literal>8ab2d3c9689aaf18 b4958c334c82d8b1</literal></entry>
</row>
<row>
<entry>
<literal><function>decode</function>(<parameter>string</parameter> <type>text</type>,
<parameter>type</parameter> <type>text</type>)</literal>
</entry>
<entry><type>bytea</type></entry>
<entry>
Decode binary string from <parameter>string</parameter> previously
encoded with <literal>encode</>. Parameter type is same as in <literal>encode</>.
</entry>
<entry><literal>decode('123\\000456', 'escape')</literal></entry>
<entry><literal>123\000456</literal></entry>
</row>
<row>
<entry>
<literal><function>encode</function>(<parameter>string</parameter> <type>bytea</type>,
<parameter>type</parameter> <type>text</type>)</literal>
</entry>
<entry><type>text</type></entry>
<entry>
Encode binary string to <acronym>ASCII</acronym>-only representation. Supported
types are: <literal>base64</>, <literal>hex</>, <literal>escape</>.
</entry>
<entry><literal>encode('123\\000456'::bytea, 'escape')</literal></entry>
<entry><literal>123\000456</literal></entry>
</row>
</tbody>
</tgroup>
</table>
......@@ -4321,10 +4320,10 @@ SELECT SUBSTRING('XY1234Z', 'Y*?([0-9]{1,3})');
<primary>to_date</primary>
</indexterm>
<indexterm>
<primary>to_timestamp</primary>
<primary>to_number</primary>
</indexterm>
<indexterm>
<primary>to_number</primary>
<primary>to_timestamp</primary>
</indexterm>
<para>
......@@ -4394,6 +4393,12 @@ SELECT SUBSTRING('XY1234Z', 'Y*?([0-9]{1,3})');
<entry>convert string to date</entry>
<entry><literal>to_date('05&nbsp;Dec&nbsp;2000', 'DD&nbsp;Mon&nbsp;YYYY')</literal></entry>
</row>
<row>
<entry><literal><function>to_number</function>(<type>text</type>, <type>text</type>)</literal></entry>
<entry><type>numeric</type></entry>
<entry>convert string to numeric</entry>
<entry><literal>to_number('12,454.8-', '99G999D9S')</literal></entry>
</row>
<row>
<entry><literal><function>to_timestamp</function>(<type>text</type>, <type>text</type>)</literal></entry>
<entry><type>timestamp with time zone</type></entry>
......@@ -4406,12 +4411,6 @@ SELECT SUBSTRING('XY1234Z', 'Y*?([0-9]{1,3})');
<entry>convert UNIX epoch to time stamp</entry>
<entry><literal>to_timestamp(200120400)</literal></entry>
</row>
<row>
<entry><literal><function>to_number</function>(<type>text</type>, <type>text</type>)</literal></entry>
<entry><type>numeric</type></entry>
<entry>convert string to numeric</entry>
<entry><literal>to_number('12,454.8-', '99G999D9S')</literal></entry>
</row>
</tbody>
</tgroup>
</table>
......@@ -5271,6 +5270,9 @@ SELECT SUBSTRING('XY1234Z', 'Y*?([0-9]{1,3})');
<indexterm>
<primary>age</primary>
</indexterm>
<indexterm>
<primary>clock_timestamp</primary>
</indexterm>
<indexterm>
<primary>current_date</primary>
</indexterm>
......@@ -5310,17 +5312,14 @@ SELECT SUBSTRING('XY1234Z', 'Y*?([0-9]{1,3})');
<indexterm>
<primary>now</primary>
</indexterm>
<indexterm>
<primary>transaction_timestamp</primary>
</indexterm>
<indexterm>
<primary>statement_timestamp</primary>
</indexterm>
<indexterm>
<primary>clock_timestamp</primary>
<primary>timeofday</primary>
</indexterm>
<indexterm>
<primary>timeofday</primary>
<primary>transaction_timestamp</primary>
</indexterm>
<table id="functions-datetime-table">
......@@ -5354,6 +5353,16 @@ SELECT SUBSTRING('XY1234Z', 'Y*?([0-9]{1,3})');
<entry><literal>43 years 8 mons 3 days</literal></entry>
</row>
<row>
<entry><literal><function>clock_timestamp</function>()</literal></entry>
<entry><type>timestamp with time zone</type></entry>
<entry>Current date and time (changes during statement execution);
see <xref linkend="functions-datetime-current">
</entry>
<entry></entry>
<entry></entry>
</row>
<row>
<entry><literal><function>current_date</function></literal></entry>
<entry><type>date</type></entry>
......@@ -5503,16 +5512,6 @@ SELECT SUBSTRING('XY1234Z', 'Y*?([0-9]{1,3})');
<entry></entry>
</row>
<row>
<entry><literal><function>transaction_timestamp</function>()</literal></entry>
<entry><type>timestamp with time zone</type></entry>
<entry>Current date and time (start of current transaction);
see <xref linkend="functions-datetime-current">
</entry>
<entry></entry>
<entry></entry>
</row>
<row>
<entry><literal><function>statement_timestamp</function>()</literal></entry>
<entry><type>timestamp with time zone</type></entry>
......@@ -5524,9 +5523,10 @@ SELECT SUBSTRING('XY1234Z', 'Y*?([0-9]{1,3})');
</row>
<row>
<entry><literal><function>clock_timestamp</function>()</literal></entry>
<entry><type>timestamp with time zone</type></entry>
<entry>Current date and time (changes during statement execution);
<entry><literal><function>timeofday</function>()</literal></entry>
<entry><type>text</type></entry>
<entry>Current date and time
(like <function>clock_timestamp</>, but as a <type>text</> string);
see <xref linkend="functions-datetime-current">
</entry>
<entry></entry>
......@@ -5534,16 +5534,14 @@ SELECT SUBSTRING('XY1234Z', 'Y*?([0-9]{1,3})');
</row>
<row>
<entry><literal><function>timeofday</function>()</literal></entry>
<entry><type>text</type></entry>
<entry>Current date and time
(like <function>clock_timestamp</>, but as a <type>text</> string);
<entry><literal><function>transaction_timestamp</function>()</literal></entry>
<entry><type>timestamp with time zone</type></entry>
<entry>Current date and time (start of current transaction);
see <xref linkend="functions-datetime-current">
</entry>
<entry></entry>
<entry></entry>
</row>
</tbody>
</tgroup>
</table>
......@@ -6944,6 +6942,20 @@ SELECT pg_sleep(1.5);
</row>
</thead>
<tbody>
<row>
<entry><literal><function>abbrev</function>(<type>inet</type>)</literal></entry>
<entry><type>text</type></entry>
<entry>abbreviated display format as text</entry>
<entry><literal>abbrev(inet '10.1.0.0/16')</literal></entry>
<entry><literal>10.1.0.0/16</literal></entry>
</row>
<row>
<entry><literal><function>abbrev</function>(<type>cidr</type>)</literal></entry>
<entry><type>text</type></entry>
<entry>abbreviated display format as text</entry>
<entry><literal>abbrev(cidr '10.1.0.0/16')</literal></entry>
<entry><literal>10.1/16</literal></entry>
</row>
<row>
<entry><literal><function>broadcast</function>(<type>inet</type>)</literal></entry>
<entry><type>inet</type></entry>
......@@ -6951,6 +6963,14 @@ SELECT pg_sleep(1.5);
<entry><literal>broadcast('192.168.1.5/24')</literal></entry>
<entry><literal>192.168.1.255/24</literal></entry>
</row>
<row>
<entry><literal><function>family</function>(<type>inet</type>)</literal></entry>
<entry><type>int</type></entry>
<entry>extract family of address; <literal>4</literal> for IPv4,
<literal>6</literal> for IPv6</entry>
<entry><literal>family('::1')</literal></entry>
<entry><literal>6</literal></entry>
</row>
<row>
<entry><literal><function>host</function>(<type>inet</type>)</literal></entry>
<entry><type>text</type></entry>
......@@ -6958,6 +6978,13 @@ SELECT pg_sleep(1.5);
<entry><literal>host('192.168.1.5/24')</literal></entry>
<entry><literal>192.168.1.5</literal></entry>
</row>
<row>
<entry><literal><function>hostmask</function>(<type>inet</type>)</literal></entry>
<entry><type>inet</type></entry>
<entry>construct host mask for network</entry>
<entry><literal>hostmask('192.168.23.20/30')</literal></entry>
<entry><literal>0.0.0.3</literal></entry>
</row>
<row>
<entry><literal><function>masklen</function>(<type>inet</type>)</literal></entry>
<entry><type>int</type></entry>
......@@ -6965,6 +6992,20 @@ SELECT pg_sleep(1.5);
<entry><literal>masklen('192.168.1.5/24')</literal></entry>
<entry><literal>24</literal></entry>
</row>
<row>
<entry><literal><function>netmask</function>(<type>inet</type>)</literal></entry>
<entry><type>inet</type></entry>
<entry>construct netmask for network</entry>
<entry><literal>netmask('192.168.1.5/24')</literal></entry>
<entry><literal>255.255.255.0</literal></entry>
</row>
<row>
<entry><literal><function>network</function>(<type>inet</type>)</literal></entry>
<entry><type>cidr</type></entry>
<entry>extract network part of address</entry>
<entry><literal>network('192.168.1.5/24')</literal></entry>
<entry><literal>192.168.1.0/24</literal></entry>
</row>
<row>
<entry><literal><function>set_masklen</function>(<type>inet</type>, <type>int</type>)</literal></entry>
<entry><type>inet</type></entry>
......@@ -6979,27 +7020,6 @@ SELECT pg_sleep(1.5);
<entry><literal>set_masklen('192.168.1.0/24'::cidr, 16)</literal></entry>
<entry><literal>192.168.0.0/16</literal></entry>
</row>
<row>
<entry><literal><function>netmask</function>(<type>inet</type>)</literal></entry>
<entry><type>inet</type></entry>
<entry>construct netmask for network</entry>
<entry><literal>netmask('192.168.1.5/24')</literal></entry>
<entry><literal>255.255.255.0</literal></entry>
</row>
<row>
<entry><literal><function>hostmask</function>(<type>inet</type>)</literal></entry>
<entry><type>inet</type></entry>
<entry>construct host mask for network</entry>
<entry><literal>hostmask('192.168.23.20/30')</literal></entry>
<entry><literal>0.0.0.3</literal></entry>
</row>
<row>
<entry><literal><function>network</function>(<type>inet</type>)</literal></entry>
<entry><type>cidr</type></entry>
<entry>extract network part of address</entry>
<entry><literal>network('192.168.1.5/24')</literal></entry>
<entry><literal>192.168.1.0/24</literal></entry>
</row>
<row>
<entry><literal><function>text</function>(<type>inet</type>)</literal></entry>
<entry><type>text</type></entry>
......@@ -7007,28 +7027,6 @@ SELECT pg_sleep(1.5);
<entry><literal>text(inet '192.168.1.5')</literal></entry>
<entry><literal>192.168.1.5/32</literal></entry>
</row>
<row>
<entry><literal><function>abbrev</function>(<type>inet</type>)</literal></entry>
<entry><type>text</type></entry>
<entry>abbreviated display format as text</entry>
<entry><literal>abbrev(inet '10.1.0.0/16')</literal></entry>
<entry><literal>10.1.0.0/16</literal></entry>
</row>
<row>
<entry><literal><function>abbrev</function>(<type>cidr</type>)</literal></entry>
<entry><type>text</type></entry>
<entry>abbreviated display format as text</entry>
<entry><literal>abbrev(cidr '10.1.0.0/16')</literal></entry>
<entry><literal>10.1/16</literal></entry>
</row>
<row>
<entry><literal><function>family</function>(<type>inet</type>)</literal></entry>
<entry><type>int</type></entry>
<entry>extract family of address; <literal>4</literal> for IPv4,
<literal>6</literal> for IPv6</entry>
<entry><literal>family('::1')</literal></entry>
<entry><literal>6</literal></entry>
</row>
</tbody>
</tgroup>
</table>
......@@ -7132,11 +7130,6 @@ SELECT pg_sleep(1.5);
</thead>
<tbody>
<row>
<entry><literal><function>nextval</function>(<type>regclass</type>)</literal></entry>
<entry><type>bigint</type></entry>
<entry>Advance sequence and return new value</entry>
</row>
<row>
<entry><literal><function>currval</function>(<type>regclass</type>)</literal></entry>
<entry><type>bigint</type></entry>
......@@ -7144,9 +7137,9 @@ SELECT pg_sleep(1.5);
<function>nextval</function> for specified sequence</entry>
</row>
<row>
<entry><literal><function>lastval</function>()</literal></entry>
<entry><literal><function>nextval</function>(<type>regclass</type>)</literal></entry>
<entry><type>bigint</type></entry>
<entry>Return value most recently obtained with <function>nextval</function></entry>
<entry>Advance sequence and return new value</entry>
</row>
<row>
<entry><literal><function>setval</function>(<type>regclass</type>, <type>bigint</type>)</literal></entry>
......@@ -7691,18 +7684,6 @@ SELECT NULLIF(value, '(none)') ...
<tbody>
<row>
<entry>
<literal>
<function>array_cat</function>
(<type>anyarray</type>, <type>anyarray</type>)
</literal>
</entry>
<entry><type>anyarray</type></entry>
<entry>concatenate two arrays</entry>
<entry><literal>array_cat(ARRAY[1,2,3], ARRAY[4,5])</literal></entry>
<entry><literal>{1,2,3,4,5}</literal></entry>
</row>
<row>
<entry>
<literal>
<function>array_append</function>
(<type>anyarray</type>, <type>anyelement</type>)
......@@ -7716,14 +7697,14 @@ SELECT NULLIF(value, '(none)') ...
<row>
<entry>
<literal>
<function>array_prepend</function>
(<type>anyelement</type>, <type>anyarray</type>)
<function>array_cat</function>
(<type>anyarray</type>, <type>anyarray</type>)
</literal>
</entry>
<entry><type>anyarray</type></entry>
<entry>append an element to the beginning of an array</entry>
<entry><literal>array_prepend(1, ARRAY[2,3])</literal></entry>
<entry><literal>{1,2,3}</literal></entry>
<entry>concatenate two arrays</entry>
<entry><literal>array_cat(ARRAY[1,2,3], ARRAY[4,5])</literal></entry>
<entry><literal>{1,2,3,4,5}</literal></entry>
</row>
<row>
<entry>
......@@ -7752,14 +7733,14 @@ SELECT NULLIF(value, '(none)') ...
<row>
<entry>
<literal>
<function>array_upper</function>
(<type>anyarray</type>, <type>int</type>)
<function>array_prepend</function>
(<type>anyelement</type>, <type>anyarray</type>)
</literal>
</entry>
<entry><type>int</type></entry>
<entry>returns upper bound of the requested array dimension</entry>
<entry><literal>array_upper(ARRAY[1,2,3,4], 1)</literal></entry>
<entry><literal>4</literal></entry>
<entry><type>anyarray</type></entry>
<entry>append an element to the beginning of an array</entry>
<entry><literal>array_prepend(1, ARRAY[2,3])</literal></entry>
<entry><literal>{1,2,3}</literal></entry>
</row>
<row>
<entry>
......@@ -7775,6 +7756,18 @@ SELECT NULLIF(value, '(none)') ...
</row>
<row>
<entry>
<literal>
<function>array_upper</function>
(<type>anyarray</type>, <type>int</type>)
</literal>
</entry>
<entry><type>int</type></entry>
<entry>returns upper bound of the requested array dimension</entry>
<entry><literal>array_upper(ARRAY[1,2,3,4], 1)</literal></entry>
<entry><literal>4</literal></entry>
</row>
<row>
<entry>
<literal>
<function>string_to_array</function>
(<type>text</type>, <type>text</type>)
......@@ -8954,18 +8947,18 @@ select current_date + s.a as dates from generate_series(0,14,7) as s(a);
<entry>port of the local connection</entry>
</row>
<row>
<entry><literal><function>session_user</function></literal></entry>
<entry><type>name</type></entry>
<entry>session user name</entry>
</row>
<row>
<entry><literal><function>pg_postmaster_start_time</function>()</literal></entry>
<entry><type>timestamp with time zone</type></entry>
<entry>server start time</entry>
</row>
<row>
<entry><literal><function>session_user</function></literal></entry>
<entry><type>name</type></entry>
<entry>session user name</entry>
</row>
<row>
<entry><literal><function>user</function></literal></entry>
<entry><type>name</type></entry>
......@@ -9104,21 +9097,6 @@ SET search_path TO <replaceable>schema</> <optional>, <replaceable>schema</>, ..
</thead>
<tbody>
<row>
<entry><literal><function>has_table_privilege</function>(<parameter>user</parameter>,
<parameter>table</parameter>,
<parameter>privilege</parameter>)</literal>
</entry>
<entry><type>boolean</type></entry>
<entry>does user have privilege for table</entry>
</row>
<row>
<entry><literal><function>has_table_privilege</function>(<parameter>table</parameter>,
<parameter>privilege</parameter>)</literal>
</entry>
<entry><type>boolean</type></entry>
<entry>does current user have privilege for table</entry>
</row>
<row>
<entry><literal><function>has_database_privilege</function>(<parameter>user</parameter>,
<parameter>database</parameter>,
......@@ -9165,34 +9143,34 @@ SET search_path TO <replaceable>schema</> <optional>, <replaceable>schema</>, ..
<entry>does current user have privilege for language</entry>
</row>
<row>
<entry><literal><function>pg_has_role</function>(<parameter>user</parameter>,
<parameter>role</parameter>,
<entry><literal><function>has_schema_privilege</function>(<parameter>user</parameter>,
<parameter>schema</parameter>,
<parameter>privilege</parameter>)</literal>
</entry>
<entry><type>boolean</type></entry>
<entry>does user have privilege for role</entry>
<entry>does user have privilege for schema</entry>
</row>
<row>
<entry><literal><function>pg_has_role</function>(<parameter>role</parameter>,
<entry><literal><function>has_schema_privilege</function>(<parameter>schema</parameter>,
<parameter>privilege</parameter>)</literal>
</entry>
<entry><type>boolean</type></entry>
<entry>does current user have privilege for role</entry>
<entry>does current user have privilege for schema</entry>
</row>
<row>
<entry><literal><function>has_schema_privilege</function>(<parameter>user</parameter>,
<parameter>schema</parameter>,
<entry><literal><function>has_table_privilege</function>(<parameter>user</parameter>,
<parameter>table</parameter>,
<parameter>privilege</parameter>)</literal>
</entry>
<entry><type>boolean</type></entry>
<entry>does user have privilege for schema</entry>
<entry>does user have privilege for table</entry>
</row>
<row>
<entry><literal><function>has_schema_privilege</function>(<parameter>schema</parameter>,
<entry><literal><function>has_table_privilege</function>(<parameter>table</parameter>,
<parameter>privilege</parameter>)</literal>
</entry>
<entry><type>boolean</type></entry>
<entry>does current user have privilege for schema</entry>
<entry>does current user have privilege for table</entry>
</row>
<row>
<entry><literal><function>has_tablespace_privilege</function>(<parameter>user</parameter>,
......@@ -9209,13 +9187,25 @@ SET search_path TO <replaceable>schema</> <optional>, <replaceable>schema</>, ..
<entry><type>boolean</type></entry>
<entry>does current user have privilege for tablespace</entry>
</row>
<row>
<entry><literal><function>pg_has_role</function>(<parameter>user</parameter>,
<parameter>role</parameter>,
<parameter>privilege</parameter>)</literal>
</entry>
<entry><type>boolean</type></entry>
<entry>does user have privilege for role</entry>
</row>
<row>
<entry><literal><function>pg_has_role</function>(<parameter>role</parameter>,
<parameter>privilege</parameter>)</literal>
</entry>
<entry><type>boolean</type></entry>
<entry>does current user have privilege for role</entry>
</row>
</tbody>
</tgroup>
</table>
<indexterm zone="functions-info">
<primary>has_table_privilege</primary>
</indexterm>
<indexterm zone="functions-info">
<primary>has_database_privilege</primary>
</indexterm>
......@@ -9226,36 +9216,17 @@ SET search_path TO <replaceable>schema</> <optional>, <replaceable>schema</>, ..
<primary>has_language_privilege</primary>
</indexterm>
<indexterm zone="functions-info">
<primary>pg_has_role</primary>
<primary>has_schema_privilege</primary>
</indexterm>
<indexterm zone="functions-info">
<primary>has_schema_privilege</primary>
<primary>has_table_privilege</primary>
</indexterm>
<indexterm zone="functions-info">
<primary>has_tablespace_privilege</primary>
</indexterm>
<para>
<function>has_table_privilege</function> checks whether a user
can access a table in a particular way. The user can be
specified by name or by OID
(<literal>pg_authid.oid</literal>), or if the argument is
omitted
<function>current_user</function> is assumed. The table can be specified
by name or by OID. (Thus, there are actually six variants of
<function>has_table_privilege</function>, which can be distinguished by
the number and types of their arguments.) When specifying by name,
the name can be schema-qualified if necessary.
The desired access privilege type
is specified by a text string, which must evaluate to one of the
values <literal>SELECT</literal>, <literal>INSERT</literal>, <literal>UPDATE</literal>,
<literal>DELETE</literal>, <literal>RULE</literal>, <literal>REFERENCES</literal>, or
<literal>TRIGGER</literal>. (Case of the string is not significant, however.)
An example is:
<programlisting>
SELECT has_table_privilege('myschema.mytable', 'select');
</programlisting>
</para>
<indexterm zone="functions-info">
<primary>pg_has_role</primary>
</indexterm>
<para>
<function>has_database_privilege</function> checks whether a user
......@@ -9292,19 +9263,6 @@ SELECT has_function_privilege('joeuser', 'myfunc(int, text)', 'execute');
<literal>USAGE</literal>.
</para>
<para>
<function>pg_has_role</function> checks whether a user
can access a role in a particular way. The possibilities for its
arguments are analogous to <function>has_table_privilege</function>.
The desired access privilege type must evaluate to
<literal>MEMBER</literal> or
<literal>USAGE</literal>.
<literal>MEMBER</literal> denotes direct or indirect membership in
the role (that is, the right to do <literal>SET ROLE</>), while
<literal>USAGE</literal> denotes whether the privileges of the role
are immediately available without doing <literal>SET ROLE</>.
</para>
<para>
<function>has_schema_privilege</function> checks whether a user
can access a schema in a particular way. The possibilities for its
......@@ -9314,6 +9272,28 @@ SELECT has_function_privilege('joeuser', 'myfunc(int, text)', 'execute');
<literal>USAGE</literal>.
</para>
<para>
<function>has_table_privilege</function> checks whether a user
can access a table in a particular way. The user can be
specified by name or by OID
(<literal>pg_authid.oid</literal>), or if the argument is
omitted
<function>current_user</function> is assumed. The table can be specified
by name or by OID. (Thus, there are actually six variants of
<function>has_table_privilege</function>, which can be distinguished by
the number and types of their arguments.) When specifying by name,
the name can be schema-qualified if necessary.
The desired access privilege type
is specified by a text string, which must evaluate to one of the
values <literal>SELECT</literal>, <literal>INSERT</literal>, <literal>UPDATE</literal>,
<literal>DELETE</literal>, <literal>RULE</literal>, <literal>REFERENCES</literal>, or
<literal>TRIGGER</literal>. (Case of the string is not significant, however.)
An example is:
<programlisting>
SELECT has_table_privilege('myschema.mytable', 'select');
</programlisting>
</para>
<para>
<function>has_tablespace_privilege</function> checks whether a user
can access a tablespace in a particular way. The possibilities for its
......@@ -9322,9 +9302,22 @@ SELECT has_function_privilege('joeuser', 'myfunc(int, text)', 'execute');
<literal>CREATE</literal>.
</para>
<para>
<function>pg_has_role</function> checks whether a user
can access a role in a particular way. The possibilities for its
arguments are analogous to <function>has_table_privilege</function>.
The desired access privilege type must evaluate to
<literal>MEMBER</literal> or
<literal>USAGE</literal>.
<literal>MEMBER</literal> denotes direct or indirect membership in
the role (that is, the right to do <command>SET ROLE</>), while
<literal>USAGE</literal> denotes whether the privileges of the role
are immediately available without doing <command>SET ROLE</>.
</para>
<para>
To test whether a user holds a grant option on the privilege,
append <literal> WITH GRANT OPTION</literal> to the privilege key
append <literal>WITH GRANT OPTION</literal> to the privilege key
word; for example <literal>'UPDATE WITH GRANT OPTION'</literal>.
</para>
......@@ -9351,16 +9344,10 @@ SELECT relname FROM pg_class WHERE pg_table_is_visible(oid);
<tbody>
<row>
<entry><literal><function>pg_table_is_visible</function>(<parameter>table_oid</parameter>)</literal>
</entry>
<entry><type>boolean</type></entry>
<entry>is table visible in search path</entry>
</row>
<row>
<entry><literal><function>pg_type_is_visible</function>(<parameter>type_oid</parameter>)</literal>
<entry><literal><function>pg_conversion_is_visible</function>(<parameter>conversion_oid</parameter>)</literal>
</entry>
<entry><type>boolean</type></entry>
<entry>is type (or domain) visible in search path</entry>
<entry>is conversion visible in search path</entry>
</row>
<row>
<entry><literal><function>pg_function_is_visible</function>(<parameter>function_oid</parameter>)</literal>
......@@ -9381,20 +9368,23 @@ SELECT relname FROM pg_class WHERE pg_table_is_visible(oid);
<entry>is operator class visible in search path</entry>
</row>
<row>
<entry><literal><function>pg_conversion_is_visible</function>(<parameter>conversion_oid</parameter>)</literal>
<entry><literal><function>pg_table_is_visible</function>(<parameter>table_oid</parameter>)</literal>
</entry>
<entry><type>boolean</type></entry>
<entry>is conversion visible in search path</entry>
<entry>is table visible in search path</entry>
</row>
<row>
<entry><literal><function>pg_type_is_visible</function>(<parameter>type_oid</parameter>)</literal>
</entry>
<entry><type>boolean</type></entry>
<entry>is type (or domain) visible in search path</entry>
</row>
</tbody>
</tgroup>
</table>
<indexterm zone="functions-info">
<primary>pg_table_is_visible</primary>
</indexterm>
<indexterm zone="functions-info">
<primary>pg_type_is_visible</primary>
<primary>pg_conversion_is_visible</primary>
</indexterm>
<indexterm zone="functions-info">
<primary>pg_function_is_visible</primary>
......@@ -9406,23 +9396,26 @@ SELECT relname FROM pg_class WHERE pg_table_is_visible(oid);
<primary>pg_opclass_is_visible</primary>
</indexterm>
<indexterm zone="functions-info">
<primary>pg_conversion_is_visible</primary>
<primary>pg_table_is_visible</primary>
</indexterm>
<indexterm zone="functions-info">
<primary>pg_type_is_visible</primary>
</indexterm>
<para>
<function>pg_table_is_visible</function> performs the check for
tables (or views, or any other kind of <literal>pg_class</> entry).
<function>pg_type_is_visible</function>,
<function>pg_conversion_is_visible</function>,
<function>pg_function_is_visible</function>,
<function>pg_operator_is_visible</function>,
<function>pg_opclass_is_visible</function>, and
<function>pg_conversion_is_visible</function> perform the same sort of
visibility check for types (and domains), functions, operators, operator classes
and conversions, respectively. For functions and operators, an object in
<function>pg_opclass_is_visible</function>,
<function>pg_table_is_visible</function>, and
<function>pg_type_is_visible</function> perform the visibility check for
conversions, functions, operators, operator classes, tables, and
types. Note that <function>pg_table_is_visible</function> can also be used
with views, indexes and sequences; <function>pg_type_is_visible</function>
can also be used with domains. For functions and operators, an object in
the search path is visible if there is no object of the same name
<emphasis>and argument data type(s)</> earlier in the path. For
operator classes, both name and associated index access method are
considered.
<emphasis>and argument data type(s)</> earlier in the path. For operator
classes, both name and associated index access method are considered.
</para>
<para>
......@@ -9545,11 +9538,6 @@ SELECT pg_type_is_visible('myschema.widget'::regtype);
<entry>get name of the sequence that a <type>serial</type> or <type>bigserial</type> column
uses</entry>
</row>
<row>
<entry><literal><function>pg_tablespace_databases</function>(<parameter>tablespace_oid</parameter>)</literal></entry>
<entry><type>setof oid</type></entry>
<entry>get the set of database OIDs that have objects in the tablespace</entry>
</row>
<row>
<entry><function>pg_get_triggerdef</function>(<parameter>trigger_oid</parameter>)</entry>
<entry><type>text</type></entry>
......@@ -9580,6 +9568,11 @@ SELECT pg_type_is_visible('myschema.widget'::regtype);
<entry><type>text</type></entry>
<entry>get underlying <command>SELECT</command> command for view</entry>
</row>
<row>
<entry><literal><function>pg_tablespace_databases</function>(<parameter>tablespace_oid</parameter>)</literal></entry>
<entry><type>setof oid</type></entry>
<entry>get the set of database OIDs that have objects in the tablespace</entry>
</row>
</tbody>
</tgroup>
</table>
......@@ -9617,6 +9610,11 @@ SELECT pg_type_is_visible('myschema.widget'::regtype);
returned if the column does not have an associated sequence.
</para>
<para>
<function>pg_get_userbyid</function> extracts a role's name given
its OID.
</para>
<para>
<function>pg_tablespace_databases</function> allows a tablespace to be
examined. It returns the set of OIDs of databases that have objects stored
......@@ -9627,17 +9625,12 @@ SELECT pg_type_is_visible('myschema.widget'::regtype);
<structname>pg_class</> catalogs.
</para>
<para>
<function>pg_get_userbyid</function> extracts a role's name given
its OID.
</para>
<indexterm zone="functions-info">
<primary>obj_description</primary>
<primary>col_description</primary>
</indexterm>
<indexterm zone="functions-info">
<primary>col_description</primary>
<primary>obj_description</primary>
</indexterm>
<indexterm zone="functions-info">
......@@ -9650,11 +9643,10 @@ SELECT pg_type_is_visible('myschema.widget'::regtype);
</indexterm>
<para>
The functions shown in <xref
linkend="functions-info-comment-table"> extract comments
previously stored with the <command>COMMENT</command> command. A
null value is returned if no comment could be found matching the
specified parameters.
The functions shown in <xref linkend="functions-info-comment-table">
extract comments previously stored with the <xref linkend="sql-comment"
endterm="sql-comment-title"> command. A null value is returned if no
comment could be found matching the specified parameters.
</para>
<table id="functions-info-comment-table">
......@@ -9665,6 +9657,11 @@ SELECT pg_type_is_visible('myschema.widget'::regtype);
</thead>
<tbody>
<row>
<entry><literal><function>col_description</function>(<parameter>table_oid</parameter>, <parameter>column_number</parameter>)</literal></entry>
<entry><type>text</type></entry>
<entry>get comment for a table column</entry>
</row>
<row>
<entry><literal><function>obj_description</function>(<parameter>object_oid</parameter>, <parameter>catalog_name</parameter>)</literal></entry>
<entry><type>text</type></entry>
......@@ -9675,11 +9672,6 @@ SELECT pg_type_is_visible('myschema.widget'::regtype);
<entry><type>text</type></entry>
<entry>get comment for a database object (<emphasis>deprecated</emphasis>)</entry>
</row>
<row>
<entry><literal><function>col_description</function>(<parameter>table_oid</parameter>, <parameter>column_number</parameter>)</literal></entry>
<entry><type>text</type></entry>
<entry>get comment for a table column</entry>
</row>
<row>
<entry><literal><function>shobj_description</function>(<parameter>object_oid</parameter>, <parameter>catalog_name</parameter>)</literal></entry>
<entry><type>text</type></entry>
......@@ -9689,6 +9681,13 @@ SELECT pg_type_is_visible('myschema.widget'::regtype);
</tgroup>
</table>
<para>
<function>col_description</function> returns the comment for a table column,
which is specified by the OID of its table and its column number.
<function>obj_description</function> cannot be used for table columns since
columns do not have OIDs of their own.
</para>
<para>
The two-parameter form of <function>obj_description</function> returns the
comment for a database object specified by its OID and the name of the
......@@ -9701,13 +9700,6 @@ SELECT pg_type_is_visible('myschema.widget'::regtype);
comment could be returned.
</para>
<para>
<function>col_description</function> returns the comment for a table column,
which is specified by the OID of its table and its column number.
<function>obj_description</function> cannot be used for table columns since
columns do not have OIDs of their own.
</para>
<para>
<function>shobj_description</function> is used just like
<function>obj_description</function> only that it is used for retrieving
......@@ -9961,9 +9953,6 @@ SELECT set_config('log_statement_stats', 'off', false);
<indexterm zone="functions-admin">
<primary>pg_column_size</primary>
</indexterm>
<indexterm zone="functions-admin">
<primary>pg_tablespace_size</primary>
</indexterm>
<indexterm zone="functions-admin">
<primary>pg_database_size</primary>
</indexterm>
......@@ -9971,10 +9960,13 @@ SELECT set_config('log_statement_stats', 'off', false);
<primary>pg_relation_size</primary>
</indexterm>
<indexterm zone="functions-admin">
<primary>pg_total_relation_size</primary>
<primary>pg_size_pretty</primary>
</indexterm>
<indexterm zone="functions-admin">
<primary>pg_size_pretty</primary>
<primary>pg_tablespace_size</primary>
</indexterm>
<indexterm zone="functions-admin">
<primary>pg_total_relation_size</primary>
</indexterm>
<table id="functions-admin-dbsize">
......@@ -9991,20 +9983,6 @@ SELECT set_config('log_statement_stats', 'off', false);
<entry><type>int</type></entry>
<entry>Number of bytes used to store a particular value (possibly compressed)</entry>
</row>
<row>
<entry>
<literal><function>pg_tablespace_size</function>(<type>oid</type>)</literal>
</entry>
<entry><type>bigint</type></entry>
<entry>Disk space used by the tablespace with the specified OID</entry>
</row>
<row>
<entry>
<literal><function>pg_tablespace_size</function>(<type>name</type>)</literal>
</entry>
<entry><type>bigint</type></entry>
<entry>Disk space used by the tablespace with the specified name</entry>
</row>
<row>
<entry>
<literal><function>pg_database_size</function>(<type>oid</type>)</literal>
......@@ -10036,6 +10014,27 @@ SELECT set_config('log_statement_stats', 'off', false);
The table name may be qualified with a schema name
</entry>
</row>
<row>
<entry>
<literal><function>pg_size_pretty</function>(<type>bigint</type>)</literal>
</entry>
<entry><type>text</type></entry>
<entry>Converts a size in bytes into a human-readable format with size units</entry>
</row>
<row>
<entry>
<literal><function>pg_tablespace_size</function>(<type>oid</type>)</literal>
</entry>
<entry><type>bigint</type></entry>
<entry>Disk space used by the tablespace with the specified OID</entry>
</row>
<row>
<entry>
<literal><function>pg_tablespace_size</function>(<type>name</type>)</literal>
</entry>
<entry><type>bigint</type></entry>
<entry>Disk space used by the tablespace with the specified name</entry>
</row>
<row>
<entry>
<literal><function>pg_total_relation_size</function>(<type>oid</type>)</literal>
......@@ -10057,13 +10056,6 @@ SELECT set_config('log_statement_stats', 'off', false);
qualified with a schema name
</entry>
</row>
<row>
<entry>
<literal><function>pg_size_pretty</function>(<type>bigint</type>)</literal>
</entry>
<entry><type>text</type></entry>
<entry>Converts a size in bytes into a human-readable format with size units</entry>
</row>
</tbody>
</tgroup>
</table>
......@@ -10074,9 +10066,9 @@ SELECT set_config('log_statement_stats', 'off', false);
</para>
<para>
<function>pg_tablespace_size</> and <function>pg_database_size</> accept
the OID or name of a tablespace or database, and return the total disk
space used therein.
<function>pg_database_size</function> and <function>pg_tablespace_size</>
accept the OID or name of a database or tablespace, and return the total
disk space used therein.
</para>
<para>
......@@ -10084,18 +10076,18 @@ SELECT set_config('log_statement_stats', 'off', false);
toast table, and returns the size in bytes.
</para>
<para>
<function>pg_total_relation_size</> accepts the OID or name of a
table or toast table, and returns the size in bytes of the data
and all associated indexes and toast tables.
</para>
<para>
<function>pg_size_pretty</> can be used to format the result of one of
the other functions in a human-readable way, using kB, MB, GB or TB as
appropriate.
</para>
<para>
<function>pg_total_relation_size</> accepts the OID or name of a
table or toast table, and returns the size in bytes of the data
and all associated indexes and toast tables.
</para>
<para>
The functions shown in <xref
linkend="functions-admin-genfile"> provide native file access to
......
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