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Peter Eisentraut
2010-08-17 04:37:19 +00:00
parent c93b652c2d
commit f71145d0ec
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doc/src/sgml/func.sgml
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@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.521.2.3 2010/08/15 21:26:42 tgl Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.521.2.4 2010/08/17 04:37:16 petere Exp $ -->
<chapter id="functions">
<title>Functions and Operators</title>
@ -9497,7 +9497,7 @@ SELECT NULLIF(value, '(none)') ...
<para>
Array comparisons compare the array contents element-by-element,
using the default B-Tree comparison function for the element data type.
using the default B-tree comparison function for the element data type.
In multidimensional arrays the elements are visited in row-major order
(last subscript varies most rapidly).
If the contents of two arrays are equal but the dimensionality is
@ -9988,8 +9988,8 @@ SELECT NULLIF(value, '(none)') ...
SELECT b1 = ANY((SELECT b2 FROM t2 ...)) FROM t1 ...;
</programlisting>
Here <function>ANY</function> can be considered either as introducing
a subquery, or as being an aggregate function, if the sub-select
returns one row with a boolean value.
a subquery, or as being an aggregate function, if the subquery
returns one row with a Boolean value.
Thus the standard name cannot be given to these aggregates.
</para>
</note>
@ -11224,8 +11224,8 @@ AND
<literal>&gt;</> or
<literal>&gt;=</>,
or has semantics similar to one of these. (To be specific, an operator
can be a row comparison operator if it is a member of a B-Tree operator
class, or is the negator of the <literal>=</> member of a B-Tree operator
can be a row comparison operator if it is a member of a B-tree operator
class, or is the negator of the <literal>=</> member of a B-tree operator
class.)
</para>
@ -13199,7 +13199,7 @@ postgres=# select pg_start_backup('label_goes_here');
0/D4445B8
(1 row)
</programlisting>
There is an optional boolean second parameter. If <literal>true</>,
There is an optional second parameter of type <type>boolean</type>. If <literal>true</>,
it specifies executing <function>pg_start_backup</> as quickly as
possible. This forces an immediate checkpoint which will cause a
spike in I/O operations, slowing any concurrently executing queries.
@ -13576,7 +13576,7 @@ postgres=# SELECT * FROM pg_xlogfile_name_offset(pg_stop_backup());
<para>
<function>pg_relation_filepath</> is similar to
<function>pg_relation_filenode</>, but it returns the entire file pathname
<function>pg_relation_filenode</>, but it returns the entire file path name
(relative to the database cluster's data directory <varname>PGDATA</>) of
the relation.
</para>