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Per-column collation support

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This adds collation support for columns and domains, a COLLATE clause
to override it per expression, and B-tree index support.

Peter Eisentraut
reviewed by Pavel Stehule, Itagaki Takahiro, Robert Haas, Noah Misch
This commit is contained in:
Peter Eisentraut
2011-02-08 23:04:18 +02:00
parent 1703f0e8da
commit 414c5a2ea6
156 changed files with 4519 additions and 582 deletions
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16
doc/src/sgml/ref/create_index.sgml
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@@ -22,7 +22,7 @@ PostgreSQL documentation
<refsynopsisdiv>
<synopsis>
CREATE [ UNIQUE ] INDEX [ CONCURRENTLY ] [ <replaceable class="parameter">name</replaceable> ] ON <replaceable class="parameter">table</replaceable> [ USING <replaceable class="parameter">method</replaceable> ]
( { <replaceable class="parameter">column</replaceable> | ( <replaceable class="parameter">expression</replaceable> ) } [ <replaceable class="parameter">opclass</replaceable> ] [ ASC | DESC ] [ NULLS { FIRST | LAST } ] [, ...] )
( { <replaceable class="parameter">column</replaceable> | ( <replaceable class="parameter">expression</replaceable> ) } [ COLLATE <replaceable class="parameter">collation</replaceable> ] [ <replaceable class="parameter">opclass</replaceable> ] [ ASC | DESC ] [ NULLS { FIRST | LAST } ] [, ...] )
[ WITH ( <replaceable class="PARAMETER">storage_parameter</replaceable> = <replaceable class="PARAMETER">value</replaceable> [, ... ] ) ]
[ TABLESPACE <replaceable class="parameter">tablespace</replaceable> ]
[ WHERE <replaceable class="parameter">predicate</replaceable> ]
@@ -181,6 +181,20 @@ CREATE [ UNIQUE ] INDEX [ CONCURRENTLY ] [ <replaceable class="parameter">name</
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable class="parameter">collation</replaceable></term>
<listitem>
<para>
The name of the collation to use for the index. By default,
the index uses the collation declared for the column to be
indexed or the result collation of the expression to be
indexed. Indexes with nondefault collations are
available for use by queries that involve expressions using
nondefault collations.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable class="parameter">opclass</replaceable></term>
<listitem>