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Implement CREATE/DROP OPERATOR CLASS. Work still remains: need more
documentation (xindex.sgml should be rewritten), need to teach pg_dump about it, need to update contrib modules that currently build pg_opclass entries by hand. Original patch by Bill Studenmund, grammar adjustments and general update for 7.3 by Tom Lane.
This commit is contained in:
Tom Lane
@ -1,5 +1,5 @@
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<!--
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$Header: /cvsroot/pgsql/doc/src/sgml/ref/allfiles.sgml,v 1.42 2002/07/22 08:57:15 ishii Exp $
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$Header: /cvsroot/pgsql/doc/src/sgml/ref/allfiles.sgml,v 1.43 2002/07/29 22:14:10 tgl Exp $
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PostgreSQL documentation
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Complete list of usable sgml source files in this directory.
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-->
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@ -61,6 +61,7 @@ Complete list of usable sgml source files in this directory.
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<!entity createIndex system "create_index.sgml">
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<!entity createLanguage system "create_language.sgml">
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<!entity createOperator system "create_operator.sgml">
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<!entity createOperatorClass system "create_opclass.sgml">
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<!entity createRule system "create_rule.sgml">
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<!entity createSchema system "create_schema.sgml">
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<!entity createSequence system "create_sequence.sgml">
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@ -82,6 +83,7 @@ Complete list of usable sgml source files in this directory.
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<!entity dropIndex system "drop_index.sgml">
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<!entity dropLanguage system "drop_language.sgml">
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<!entity dropOperator system "drop_operator.sgml">
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<!entity dropOperatorClass system "drop_opclass.sgml">
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<!entity dropRule system "drop_rule.sgml">
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<!entity dropSchema system "drop_schema.sgml">
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<!entity dropSequence system "drop_sequence.sgml">
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316
doc/src/sgml/ref/create_opclass.sgml
Normal file
316
doc/src/sgml/ref/create_opclass.sgml
Normal file
@ -0,0 +1,316 @@
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<!--
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$Header: /cvsroot/pgsql/doc/src/sgml/ref/create_opclass.sgml,v 1.1 2002/07/29 22:14:10 tgl Exp $
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PostgreSQL documentation
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-->
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<refentry id="SQL-CREATEOPCLASS">
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<refmeta>
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<refentrytitle id="sql-createopclass-title">CREATE OPERATOR CLASS</refentrytitle>
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<refmiscinfo>SQL - Language Statements</refmiscinfo>
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</refmeta>
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<refnamediv>
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<refname>
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CREATE OPERATOR CLASS
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</refname>
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<refpurpose>
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define a new operator class for indexes
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</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<refsynopsisdivinfo>
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<date>2002-07-28</date>
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</refsynopsisdivinfo>
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<synopsis>
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CREATE OPERATOR CLASS <replaceable class="parameter">name</replaceable> [ DEFAULT ] FOR TYPE <replaceable class="parameter">data_type</replaceable> USING <replaceable class="parameter">access_method</replaceable> AS
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{ OPERATOR <replaceable class="parameter">strategy_number</replaceable> <replaceable class="parameter">operator_id</replaceable> [ ( <replaceable class="parameter">type</replaceable>, <replaceable class="parameter">type</replaceable> ) ] [ RECHECK ]
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| FUNCTION <replaceable class="parameter">support_number</replaceable> <replaceable class="parameter">func_name</replaceable> ( <replaceable class="parameter">parameter_types</replaceable> )
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| STORAGE <replaceable class="parameter">storage_type</replaceable>
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} [, ... ]
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</synopsis>
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<refsect2 id="R2-SQL-CREATEOPCLASS-1">
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<refsect2info>
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<date>2002-07-28</date>
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</refsect2info>
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<title>
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Inputs
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</title>
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<para>
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<variablelist>
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<varlistentry>
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<term><replaceable class="parameter">name</replaceable></term>
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<listitem>
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<para>
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The name of the operator class to be created.
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The name may be schema-qualified.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><literal>DEFAULT</></term>
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<listitem>
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<para>
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If present, the operator class will become the default index
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operator class for its datatype. At most one operator class
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can be the default for a specific datatype and access method.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><replaceable class="parameter">data_type</replaceable></term>
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<listitem>
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<para>
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The column datatype that this operator class is for.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><replaceable class="parameter">access_method</replaceable></term>
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<listitem>
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<para>
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The name of the index access method this operator class is for.
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</para>
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</listitem>
|
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</varlistentry>
|
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<varlistentry>
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<term><replaceable class="parameter">strategy_number</replaceable></term>
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<listitem>
|
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<para>
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The index access method's strategy number for an operator associated
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with the operator class.
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</para>
|
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</listitem>
|
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</varlistentry>
|
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<varlistentry>
|
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<term><replaceable class="parameter">operator_id</replaceable></term>
|
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<listitem>
|
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<para>
|
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The identifier (optionally schema-qualified) of an operator associated
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with the operator class.
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</para>
|
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</listitem>
|
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</varlistentry>
|
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<varlistentry>
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<term><replaceable class="parameter">type</replaceable></term>
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<listitem>
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<para>
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The input datatype(s) of an operator, or <literal>NONE</> to
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signify a left-unary or right-unary operator. The input datatypes
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may be omitted in the normal case where they are the same as the
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operator class's datatype.
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</para>
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</listitem>
|
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</varlistentry>
|
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<varlistentry>
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<term><literal>RECHECK</></term>
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<listitem>
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<para>
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If present, the index is <quote>lossy</> for this operator,
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and so the tuples retrieved using the index must be rechecked
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to verify that they actually satisfy the qualification clause
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involving this operator.
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</para>
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</listitem>
|
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</varlistentry>
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<varlistentry>
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<term><replaceable class="parameter">support_number</replaceable></term>
|
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<listitem>
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<para>
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The index access method's support procedure number for a function
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associated with the operator class.
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</para>
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</listitem>
|
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</varlistentry>
|
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<varlistentry>
|
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<term><replaceable class="parameter">func_name</replaceable></term>
|
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<listitem>
|
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<para>
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The name (optionally schema-qualified) of a function that is
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an index access method support procedure for the operator class.
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</para>
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</listitem>
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</varlistentry>
|
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<varlistentry>
|
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<term><replaceable class="parameter">parameter_types</replaceable></term>
|
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<listitem>
|
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<para>
|
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The parameter datatype(s) of the function.
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</para>
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</listitem>
|
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</varlistentry>
|
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<varlistentry>
|
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<term><replaceable class="parameter">storage_type</replaceable></term>
|
||||
<listitem>
|
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<para>
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The datatype actually stored in the index. Normally this is the
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same as the column datatype, but some index access methods (only
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GIST at this writing) allow it to be different. The
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<literal>STORAGE</> clause must be omitted unless the index access
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method allows a different type to be used.
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</para>
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||||
</listitem>
|
||||
</varlistentry>
|
||||
</variablelist>
|
||||
</para>
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||||
</refsect2>
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<refsect2 id="R2-SQL-CREATEOPCLASS-2">
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<refsect2info>
|
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<date>2002-07-28</date>
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</refsect2info>
|
||||
<title>
|
||||
Outputs
|
||||
</title>
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<para>
|
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<variablelist>
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<varlistentry>
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<term><computeroutput>
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CREATE OPERATOR CLASS
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</computeroutput></term>
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<listitem>
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<para>
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Message returned if the operator class is successfully created.
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</para>
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</listitem>
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</varlistentry>
|
||||
</variablelist>
|
||||
</para>
|
||||
</refsect2>
|
||||
</refsynopsisdiv>
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||||
|
||||
<refsect1 id="R1-SQL-CREATEOPCLASS-1">
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<refsect1info>
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||||
<date>2002-07-28</date>
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</refsect1info>
|
||||
<title>
|
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Description
|
||||
</title>
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||||
<para>
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||||
<command>CREATE OPERATOR CLASS</command> defines a new operator class,
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<replaceable class="parameter">name</replaceable>.
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</para>
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<para>
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An operator class defines how a particular datatype can be used with
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an index. The operator class specifies that certain operators will fill
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particular roles or <quote>strategies</> for this datatype and this
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access method. The operator class also specifies the support procedures to
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be used by
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the index access method when the operator class is selected for an
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index column. All the operators and functions used by an operator
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class must be defined before the operator class is created.
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</para>
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<para>
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If a schema name is given then the operator class is created in the
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specified schema. Otherwise it is created in the current schema (the one
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at the front of the search path; see <literal>CURRENT_SCHEMA()</>).
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Two operator classes in the same schema can have the same name only if they
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are for different index access methods.
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</para>
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<para>
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The user who defines an operator class becomes its owner. The user
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must own the datatype for which the operator class is being defined,
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and must have execute permission for all referenced operators and functions.
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</para>
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<para>
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<command>CREATE OPERATOR CLASS</command> does not presently check
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whether the class definition includes all the operators and functions
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required by the index access method. It is the user's
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responsibility to define a valid operator class.
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||||
</para>
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||||
|
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<para>
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||||
Refer to the chapter on interfacing extensions to indexes in the
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<citetitle>PostgreSQL Programmer's Guide</citetitle>
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for further information.
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</para>
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||||
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<refsect2 id="R2-SQL-CREATEOPCLASS-3">
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||||
<refsect2info>
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||||
<date>2002-07-28</date>
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</refsect2info>
|
||||
<title>
|
||||
Notes
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||||
</title>
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||||
<para>
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||||
Refer to
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<xref linkend="sql-dropopclass" endterm="sql-dropopclass-title">
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||||
to delete user-defined operator classes from a database.
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||||
</para>
|
||||
</refsect2>
|
||||
</refsect1>
|
||||
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||||
<refsect1 id="R1-SQL-CREATEOPCLASS-2">
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||||
<title>
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||||
Usage
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||||
</title>
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||||
<para>
|
||||
The following example command defines a GiST index operator class
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for datatype <literal>_int4</> (array of int4). See
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<filename>contrib/intarray/</> for the complete example.
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</para>
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||||
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||||
<programlisting>
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||||
CREATE OPERATOR CLASS gist__int_ops
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DEFAULT FOR TYPE _int4 USING gist AS
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OPERATOR 3 &&,
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OPERATOR 6 = RECHECK,
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OPERATOR 7 @,
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OPERATOR 8 ~,
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||||
OPERATOR 20 @@ (_int4, query_int),
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||||
FUNCTION 1 g_int_consistent (opaque, _int4, int4),
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||||
FUNCTION 2 g_int_union (bytea, opaque),
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||||
FUNCTION 3 g_int_compress (opaque),
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||||
FUNCTION 4 g_int_decompress (opaque),
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||||
FUNCTION 5 g_int_penalty (opaque, opaque, opaque),
|
||||
FUNCTION 6 g_int_picksplit (opaque, opaque),
|
||||
FUNCTION 7 g_int_same (_int4, _int4, opaque);
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||||
</programlisting>
|
||||
|
||||
<para>
|
||||
The <literal>OPERATOR</>, <literal>FUNCTION</>, and <literal>STORAGE</>
|
||||
clauses may appear in any order.
|
||||
</para>
|
||||
</refsect1>
|
||||
|
||||
<refsect1 id="R1-SQL-CREATEOPCLASS-3">
|
||||
<title>
|
||||
Compatibility
|
||||
</title>
|
||||
|
||||
<refsect2 id="R2-SQL-CREATEOPCLASS-4">
|
||||
<refsect2info>
|
||||
<date>2002-07-28</date>
|
||||
</refsect2info>
|
||||
<title>
|
||||
SQL92
|
||||
</title>
|
||||
|
||||
<para>
|
||||
<command>CREATE OPERATOR CLASS</command>
|
||||
is a <productname>PostgreSQL</productname> extension.
|
||||
There is no <command>CREATE OPERATOR CLASS</command>
|
||||
statement in <acronym>SQL92</acronym>.
|
||||
</para>
|
||||
</refsect2>
|
||||
</refsect1>
|
||||
</refentry>
|
||||
|
||||
<!-- Keep this comment at the end of the file
|
||||
Local variables:
|
||||
mode: sgml
|
||||
sgml-omittag:nil
|
||||
sgml-shorttag:t
|
||||
sgml-minimize-attributes:nil
|
||||
sgml-always-quote-attributes:t
|
||||
sgml-indent-step:1
|
||||
sgml-indent-data:t
|
||||
sgml-parent-document:nil
|
||||
sgml-default-dtd-file:"../reference.ced"
|
||||
sgml-exposed-tags:nil
|
||||
sgml-local-catalogs:"/usr/lib/sgml/catalog"
|
||||
sgml-local-ecat-files:nil
|
||||
End:
|
||||
-->
|
||||
184
doc/src/sgml/ref/drop_opclass.sgml
Normal file
184
doc/src/sgml/ref/drop_opclass.sgml
Normal file
@ -0,0 +1,184 @@
|
||||
<!--
|
||||
$Header: /cvsroot/pgsql/doc/src/sgml/ref/drop_opclass.sgml,v 1.1 2002/07/29 22:14:10 tgl Exp $
|
||||
PostgreSQL documentation
|
||||
-->
|
||||
|
||||
<refentry id="SQL-DROPOPCLASS">
|
||||
<refmeta>
|
||||
<refentrytitle id="SQL-DROPOPCLASS-TITLE">DROP OPERATOR CLASS</refentrytitle>
|
||||
<refmiscinfo>SQL - Language Statements</refmiscinfo>
|
||||
</refmeta>
|
||||
<refnamediv>
|
||||
<refname>
|
||||
DROP OPERATOR CLASS
|
||||
</refname>
|
||||
<refpurpose>
|
||||
remove a user-defined operator class
|
||||
</refpurpose>
|
||||
</refnamediv>
|
||||
|
||||
<refsynopsisdiv>
|
||||
<refsynopsisdivinfo>
|
||||
<date>2002-07-28</date>
|
||||
</refsynopsisdivinfo>
|
||||
<synopsis>
|
||||
DROP OPERATOR CLASS <replaceable class="PARAMETER">name</replaceable> USING <replaceable class="PARAMETER">access_method</replaceable> [ CASCADE | RESTRICT ]
|
||||
</synopsis>
|
||||
|
||||
<refsect2 id="R2-SQL-DROPOPCLASS-1">
|
||||
<refsect2info>
|
||||
<date>2002-07-28</date>
|
||||
</refsect2info>
|
||||
<title>
|
||||
Inputs
|
||||
</title>
|
||||
<para>
|
||||
<variablelist>
|
||||
<varlistentry>
|
||||
<term><replaceable class="parameter">name</replaceable></term>
|
||||
<listitem>
|
||||
<para>
|
||||
The name (optionally schema-qualified) of an existing operator class.
|
||||
</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
<varlistentry>
|
||||
<term><replaceable class="parameter">access_method</replaceable></term>
|
||||
<listitem>
|
||||
<para>
|
||||
The name of the index access method the operator class is for.
|
||||
</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
<varlistentry>
|
||||
<term>CASCADE</term>
|
||||
<listitem>
|
||||
<para>
|
||||
Automatically drop objects that depend on the operator class.
|
||||
</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
<varlistentry>
|
||||
<term>RESTRICT</term>
|
||||
<listitem>
|
||||
<para>
|
||||
Refuse to drop the operator class if there are any dependent objects.
|
||||
This is the default.
|
||||
</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
</variablelist>
|
||||
</para>
|
||||
</refsect2>
|
||||
|
||||
<refsect2 id="R2-SQL-DROPOPCLASS-2">
|
||||
<refsect2info>
|
||||
<date>2002-07-28</date>
|
||||
</refsect2info>
|
||||
<title>
|
||||
Outputs
|
||||
</title>
|
||||
<para>
|
||||
|
||||
<variablelist>
|
||||
<varlistentry>
|
||||
<term><computeroutput>
|
||||
DROP OPERATOR CLASS
|
||||
</computeroutput></term>
|
||||
<listitem>
|
||||
<para>
|
||||
The message returned if the command is successful.
|
||||
</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
</variablelist>
|
||||
</para>
|
||||
</refsect2>
|
||||
</refsynopsisdiv>
|
||||
|
||||
<refsect1 id="R1-SQL-DROPOPCLASS-1">
|
||||
<refsect1info>
|
||||
<date>2002-07-28</date>
|
||||
</refsect1info>
|
||||
<title>
|
||||
Description
|
||||
</title>
|
||||
<para>
|
||||
<command>DROP OPERATOR CLASS</command> drops an existing operator class
|
||||
from the database.
|
||||
To execute this command you must be the owner of the operator class.
|
||||
</para>
|
||||
|
||||
<refsect2 id="R2-SQL-DROPOPCLASS-3">
|
||||
<refsect2info>
|
||||
<date>2002-07-28</date>
|
||||
</refsect2info>
|
||||
<title>
|
||||
Notes
|
||||
</title>
|
||||
<para>
|
||||
The <command>DROP OPERATOR CLASS</command> statement is a
|
||||
<productname>PostgreSQL</productname>
|
||||
language extension.
|
||||
</para>
|
||||
<para>
|
||||
Refer to
|
||||
<xref linkend="sql-createopclass" endterm="sql-createopclass-title">
|
||||
for information on how to create operator classes.
|
||||
</para>
|
||||
</refsect2>
|
||||
</refsect1>
|
||||
|
||||
<refsect1 id="R1-SQL-DROPOPCLASS-2">
|
||||
<title>
|
||||
Usage
|
||||
</title>
|
||||
<para>
|
||||
Remove btree operator class <literal>widget_ops</literal>:
|
||||
|
||||
<programlisting>
|
||||
DROP OPERATOR CLASS widget_ops USING btree;
|
||||
</programlisting>
|
||||
|
||||
This command will not execute if there are any existing indexes
|
||||
that use the operator class. Add <literal>CASCADE</> to drop
|
||||
such indexes along with the operator class.
|
||||
</para>
|
||||
</refsect1>
|
||||
|
||||
<refsect1 id="R1-SQL-DROPOPCLASS-3">
|
||||
<title>
|
||||
Compatibility
|
||||
</title>
|
||||
|
||||
<refsect2 id="R2-SQL-DROPOPCLASS-4">
|
||||
<refsect2info>
|
||||
<date>2002-07-28</date>
|
||||
</refsect2info>
|
||||
<title>
|
||||
SQL92
|
||||
</title>
|
||||
<para>
|
||||
There is no <command>DROP OPERATOR CLASS</command> in
|
||||
<acronym>SQL92</acronym>.
|
||||
</para>
|
||||
</refsect2>
|
||||
</refsect1>
|
||||
</refentry>
|
||||
|
||||
<!-- Keep this comment at the end of the file
|
||||
Local variables:
|
||||
mode: sgml
|
||||
sgml-omittag:nil
|
||||
sgml-shorttag:t
|
||||
sgml-minimize-attributes:nil
|
||||
sgml-always-quote-attributes:t
|
||||
sgml-indent-step:1
|
||||
sgml-indent-data:t
|
||||
sgml-parent-document:nil
|
||||
sgml-default-dtd-file:"../reference.ced"
|
||||
sgml-exposed-tags:nil
|
||||
sgml-local-catalogs:"/usr/lib/sgml/catalog"
|
||||
sgml-local-ecat-files:nil
|
||||
End:
|
||||
-->
|
||||
@ -1,5 +1,5 @@
|
||||
<!--
|
||||
$Header: /cvsroot/pgsql/doc/src/sgml/ref/drop_operator.sgml,v 1.17 2002/07/12 18:43:13 tgl Exp $
|
||||
$Header: /cvsroot/pgsql/doc/src/sgml/ref/drop_operator.sgml,v 1.18 2002/07/29 22:14:10 tgl Exp $
|
||||
PostgreSQL documentation
|
||||
-->
|
||||
|
||||
@ -172,10 +172,6 @@ ERROR: RemoveOperator: right unary operator '<replaceable class="PARAMETER">oper
|
||||
<xref linkend="sql-createoperator" endterm="sql-createoperator-title">
|
||||
for information on how to create operators.
|
||||
</para>
|
||||
<para>
|
||||
It is the user's responsibility to remove any access method
|
||||
operator classes that rely on the deleted operator.
|
||||
</para>
|
||||
</refsect2>
|
||||
</refsect1>
|
||||
|
||||
|
||||
@ -1,5 +1,5 @@
|
||||
<!-- reference.sgml
|
||||
$Header: /cvsroot/pgsql/doc/src/sgml/reference.sgml,v 1.31 2002/07/22 08:57:15 ishii Exp $
|
||||
$Header: /cvsroot/pgsql/doc/src/sgml/reference.sgml,v 1.32 2002/07/29 22:14:10 tgl Exp $
|
||||
|
||||
PostgreSQL Reference Manual
|
||||
-->
|
||||
@ -70,6 +70,7 @@ PostgreSQL Reference Manual
|
||||
&createIndex;
|
||||
&createLanguage;
|
||||
&createOperator;
|
||||
&createOperatorClass;
|
||||
&createRule;
|
||||
&createSchema;
|
||||
&createSequence;
|
||||
@ -91,6 +92,7 @@ PostgreSQL Reference Manual
|
||||
&dropIndex;
|
||||
&dropLanguage;
|
||||
&dropOperator;
|
||||
&dropOperatorClass;
|
||||
&dropRule;
|
||||
&dropSchema;
|
||||
&dropSequence;
|
||||
|
||||
@ -1,5 +1,5 @@
|
||||
<!--
|
||||
$Header: /cvsroot/pgsql/doc/src/sgml/release.sgml,v 1.143 2002/07/20 15:12:55 tgl Exp $
|
||||
$Header: /cvsroot/pgsql/doc/src/sgml/release.sgml,v 1.144 2002/07/29 22:14:10 tgl Exp $
|
||||
-->
|
||||
|
||||
<appendix id="release">
|
||||
@ -24,6 +24,7 @@ CDATA means the content is "SGML-free", so you can write without
|
||||
worries about funny characters.
|
||||
-->
|
||||
<literallayout><![CDATA[
|
||||
CREATE OPERATOR CLASS/DROP OPERATOR CLASS
|
||||
CREATE CAST/DROP CAST
|
||||
Sequences created by SERIAL column definitions now auto-drop with the column
|
||||
Most forms of DROP now support RESTRICT and CASCADE options
|
||||
|
||||
Reference in New Issue
Block a user