--- /dev/null
+<!-- $Header: /cvsroot/pgsql/doc/src/sgml/information_schema.sgml,v 1.1 2003/05/18 20:55:56 petere Exp $ -->
+
+<chapter id="information-schema">
+ <title>The Information Schema</title>
+
+ <indexterm zone="information-schema">
+ <primary>information schema</primary>
+ </indexterm>
+
+ <para>
+ The information schema consists of a set of views that contain
+ information about the objects defined in the current database. The
+ information schema is defined in the SQL standard and can therefore
+ be expected to be portable and remain stable --- unlike the system
+ catalogs, which are specific to PostgreSQL and are modelled after
+ implementation concerns. The information schema views do not,
+ however, contain information about PostgreSQL-specific features; to
+ inquire about those you need to query the system catalogs or other
+ PostgreSQL-specific views.
+ </para>
+
+ <sect1 id="infoschema-schema">
+ <title>The Schema</title>
+
+ <para>
+ The information schema itself is a schema named
+ <literal>information_schema</literal>. This schema automatically
+ exists in all databases. The owner of this schema is the initial
+ database user in the cluster, and that user naturally has all the
+ privileges on this schema, including the ability to drop it (but
+ the space savings achieved by this are minuscule).
+ </para>
+
+ <para>
+ By default, the information schema is not in the schema search
+ path, so you need to access all objects in it through qualified
+ names. Since the names of some of the objects in the information
+ schema are generic names that might occur in user applications, you
+ should be careful if you want to put the information schema in the
+ path.
+ </para>
+ </sect1>
+
+ <sect1 id="infoschema-datatypes">
+ <title>Data Types</title>
+
+ <para>
+ The columns of the information schema views use special data types
+ that are defined in the information schema. These are defined as
+ simple domains over ordinary built-in types. You should not use
+ these types for work outside the information schema, but your
+ applications must be prepared for them if they select from the
+ information schema.
+ </para>
+
+ <para>
+ These types are:
+
+ <variablelist>
+ <varlistentry>
+ <term><type>cardinal_number</type></term>
+ <listitem>
+ <para>
+ A nonnegative integer.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><type>character_data</type></term>
+ <listitem>
+ <para>
+ A character string (without specific maximum length).
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><type>sql_identifier</type></term>
+ <listitem>
+ <para>
+ A character string. This type is used for SQL identifiers, the
+ type <type>character_data</type> is used for any other kind of
+ text data.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><type>time_stamp</type></term>
+ <listitem>
+ <para>
+ A domain over the type <type>timestamp</type>
+ </para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+
+ Every column in the information schema has one of these four types.
+ </para>
+
+ <para>
+ Boolean (true/false) data is represented in the information schema
+ by a column of type <type>character_data</type> that contains
+ either <literal>YES</literal> or <literal>NO</literal>. (The
+ information schema was invented before the type
+ <type>boolean</type> was added to the SQL standard, so this
+ convention is necessary to keep the information schema backward
+ compatible.)
+ </para>
+ </sect1>
+
+ <sect1 id="infoschema-information-schema-catalog-name">
+ <title><literal>information_schema_catalog_name</literal></title>
+
+ <para>
+ <literal>information_schema_catalog_name</literal> is a table that
+ always contains one row and one column containing the name of the
+ current database (current catalog, in SQL terminology).
+ </para>
+
+ <table>
+ <title><literal>information_schema_catalog_name</literal> Columns</title>
+
+ <tgroup cols="3">
+ <thead>
+ <row>
+ <entry>Name</entry>
+ <entry>Data Type</entry>
+ <entry>Description</entry>
+ </row>
+ </thead>
+
+ <tbody>
+ <row>
+ <entry><literal>catalog_name</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the database that contains this information schema</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </sect1>
+
+ <sect1 id="infoschema-check-constraints">
+ <title><literal>check_constraints</literal></title>
+
+ <para>
+ The view <literal>check_constraints</literal> contains all check
+ constraints, either defined on a table or on a domain, that are
+ owned by the current user.
+ </para>
+
+ <table>
+ <title><literal>check_constraints</literal> Columns</title>
+
+ <tgroup cols="3">
+ <thead>
+ <row>
+ <entry>Name</entry>
+ <entry>Data Type</entry>
+ <entry>Description</entry>
+ </row>
+ </thead>
+
+ <tbody>
+ <row>
+ <entry><literal>constraint_catalog</literal></entry>
+ <entry><literal>sql_identifier</literal></entry>
+ <entry>Name of the database containing the constraint (always the current database)</entry>
+ </row>
+
+ <row>
+ <entry><literal>constraint_schema</literal></entry>
+ <entry><literal>sql_identifier</literal></entry>
+ <entry>Name of the schema containing the constraint</entry>
+ </row>
+
+ <row>
+ <entry><literal>constraint_name</literal></entry>
+ <entry><literal>sql_identifier</literal></entry>
+ <entry>Name of the constraint</entry>
+ </row>
+
+ <row>
+ <entry><literal>check_clause</literal></entry>
+ <entry><literal>character_data</literal></entry>
+ <entry>The check expression of the check constraint</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </sect1>
+
+ <sect1 id="infoschema-column-domain-usage">
+ <title><literal>column_domain_usage</literal></title>
+
+ <para>
+ The view <literal>column_domain_usage</literal> identifies all
+ columns (of a table or a view) that make use of some domain defined
+ in the current database and owned by the current user.
+ </para>
+
+ <table>
+ <title><literal>column_domain_usage</literal> Columns</title>
+
+ <tgroup cols="3">
+ <thead>
+ <row>
+ <entry>Name</entry>
+ <entry>Data Type</entry>
+ <entry>Description</entry>
+ </row>
+ </thead>
+
+ <tbody>
+ <row>
+ <entry><literal>domain_catalog</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the database containing the domain (always the current database)</entry>
+ </row>
+
+ <row>
+ <entry><literal>domain_schema</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the schema containing the domain</entry>
+ </row>
+
+ <row>
+ <entry><literal>domain_name</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the domain</entry>
+ </row>
+
+ <row>
+ <entry><literal>table_catalog</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the database containing the table (always the current database)</entry>
+ </row>
+
+ <row>
+ <entry><literal>table_schema</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the schema containing the table</entry>
+ </row>
+
+ <row>
+ <entry><literal>table_name</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the table</entry>
+ </row>
+
+ <row>
+ <entry><literal>column_name</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the column</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </sect1>
+
+ <sect1 id="infoschema-columns">
+ <title><literal>columns</literal></title>
+
+ <para>
+ The view <literal>columns</literal> contains information about all
+ table columns (or view columns) in the database. System columns
+ (<literal>oid</>, etc.) are not included.
+ </para>
+
+ <table>
+ <title><literal>columns</literal> Columns</title>
+
+ <tgroup cols="3">
+ <thead>
+ <row>
+ <entry>Name</entry>
+ <entry>Data Type</entry>
+ <entry>Description</entry>
+ </row>
+ </thead>
+
+ <tbody>
+ <row>
+ <entry><literal>table_catalog</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the database containing the table (always the current database)</entry>
+ </row>
+
+ <row>
+ <entry><literal>table_schema</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the schema containing the table</entry>
+ </row>
+
+ <row>
+ <entry><literal>table_name</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the table</entry>
+ </row>
+
+ <row>
+ <entry><literal>column_name</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the column</entry>
+ </row>
+
+ <row>
+ <entry><literal>ordinal_position</literal></entry>
+ <entry><type>cardinal_number</type></entry>
+ <entry>Ordinal position of the column within the table (count starts at 1)</entry>
+ </row>
+
+ <row>
+ <entry><literal>column_default</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>
+ Default expression of the column (null if the current user is
+ not the owner of the table containing the column)
+ </entry>
+ </row>
+
+ <row>
+ <entry><literal>is_nullable</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>
+ <literal>YES</literal> if the column is possibly nullable,
+ <literal>NO</literal> if it is known not nullable. A not-null
+ constraint is one way a column can be known not nullable, but
+ there may be others.
+ </entry>
+ </row>
+
+ <row>
+ <entry><literal>data_type</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>Data type of the column</entry>
+ </row>
+
+ <row>
+ <entry><literal>character_maximum_length</literal></entry>
+ <entry><type>cardinal_number</type></entry>
+ <entry>
+ If the column has a character or bit string type, the declared
+ maximum length; null for all other data types or if no maximum
+ length was declared.
+ </entry>
+ </row>
+
+ <row>
+ <entry><literal>character_octet_length</literal></entry>
+ <entry><type>cardinal_number</type></entry>
+ <entry>
+ If the column has a character type, the maximum possible length
+ in octets (bytes) of a datum (this should not be of concern to
+ PostgreSQL users); null for all other data types.
+ </entry>
+ </row>
+
+ <row>
+ <entry><literal>numeric_precision</literal></entry>
+ <entry><type>cardinal_number</type></entry>
+ <entry>
+ If the column has a numeric type, this column contains the
+ (declared or implicit) precision of the type for this column.
+ The precision indicates the number of significant digits. It
+ may be expressed in decimal (base 10) or binary (base 2) terms,
+ as specified in the column
+ <literal>numeric_precision_radix</literal>. For all other data
+ types, this column is null.
+ </entry>
+ </row>
+
+ <row>
+ <entry><literal>numeric_precision_radix</literal></entry>
+ <entry><type>cardinal_number</type></entry>
+ <entry>
+ If the column has a numeric type, this column indicates in
+ which base the values in the columns
+ <literal>numeric_precision</literal> and
+ <literal>numeric_scale</literal> are expressed. The value is
+ either 2 or 10. For all other data types, this column is null.
+ </entry>
+ </row>
+
+ <row>
+ <entry><literal>numeric_scale</literal></entry>
+ <entry><type>cardinal_number</type></entry>
+ <entry>
+ If the column has an exact numeric type, this column contains
+ the (declared or implicit) scale of the type for this column.
+ The scale indicates the number of significant digits to the
+ right of the decimal point. It may be expressed in decimal
+ (base 10) or binary (base 2) terms, as specified in the column
+ <literal>numeric_precision_radix</literal>. For all other data
+ types, this column is null.
+ </entry>
+ </row>
+
+ <row>
+ <entry><literal>datetime_precision</literal></entry>
+ <entry><type>cardinal_number</type></entry>
+ <entry>
+ If the column has a date, time, or interval type, the declared
+ precision; null for all other data types or if no precision was
+ declared.
+ </entry>
+ </row>
+
+ <row>
+ <entry><literal>interval_type</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>Not yet implemented</entry>
+ </row>
+
+ <row>
+ <entry><literal>interval_precision</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>Not yet implemented</entry>
+ </row>
+
+ <row>
+ <entry><literal>character_set_catalog</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Applies to a feature not available in PostgreSQL</entry>
+ </row>
+
+ <row>
+ <entry><literal>character_set_schema</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Applies to a feature not available in PostgreSQL</entry>
+ </row>
+
+ <row>
+ <entry><literal>character_set_name</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Applies to a feature not available in PostgreSQL</entry>
+ </row>
+
+ <row>
+ <entry><literal>collation_catalog</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Applies to a feature not available in PostgreSQL</entry>
+ </row>
+
+ <row>
+ <entry><literal>collation_schema</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Applies to a feature not available in PostgreSQL</entry>
+ </row>
+
+ <row>
+ <entry><literal>collation_name</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Applies to a feature not available in PostgreSQL</entry>
+ </row>
+
+ <row>
+ <entry><literal>domain_catalog</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>
+ If the column has a domain type, the name of the database that
+ the domain is defined in (always the current database), else
+ null.
+ </entry>
+ </row>
+
+ <row>
+ <entry><literal>domain_schema</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>
+ If the column has a domain type, the name of the schema that
+ the domain is defined in, else null.
+ </entry>
+ </row>
+
+ <row>
+ <entry><literal>domain_name</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>If the column has a domain type, the name of the domain, else null.</entry>
+ </row>
+
+ <row>
+ <entry><literal>udt_catalog</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>
+ Name of the database that the column data type is defined in
+ (always the current database), null if the column has a domain
+ type.
+ </entry>
+ </row>
+
+ <row>
+ <entry><literal>udt_schema</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>
+ Name of the schema that the column data type is defined in,
+ null if the column has a domain type.
+ </entry>
+ </row>
+
+ <row>
+ <entry><literal>udt_name</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the column data type, null if the column has a domain type.</entry>
+ </row>
+
+ <row>
+ <entry><literal>scope_catalog</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Applies to a feature not available in PostgreSQL</entry>
+ </row>
+
+ <row>
+ <entry><literal>scope_schema</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Applies to a feature not available in PostgreSQL</entry>
+ </row>
+
+ <row>
+ <entry><literal>scope_name</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Applies to a feature not available in PostgreSQL</entry>
+ </row>
+
+ <row>
+ <entry><literal>maximum_cardinality</literal></entry>
+ <entry><type>cardinal_number</type></entry>
+ <entry>Applies to a feature not available in PostgreSQL</entry>
+ </row>
+
+ <row>
+ <entry><literal>dtd_identifier</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Applies to a feature not available in PostgreSQL</entry>
+ </row>
+
+ <row>
+ <entry><literal>is_self_referencing</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>Applies to a feature not available in PostgreSQL</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </sect1>
+
+ <sect1 id="infoschema-domain-constraints">
+ <title><literal>domain_constraints</literal></title>
+
+ <para>
+ The view <literal>domain_constraints</literal> contains all
+ constraints belonging to domains.
+ </para>
+
+ <table>
+ <title><literal>domain_constraints</literal> Columns</title>
+
+ <tgroup cols="3">
+ <thead>
+ <row>
+ <entry>Name</entry>
+ <entry>Data Type</entry>
+ <entry>Description</entry>
+ </row>
+ </thead>
+
+ <tbody>
+ <row>
+ <entry><literal>constraint_catalog</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the database that contains the constraint (always the current database)</entry>
+ </row>
+
+ <row>
+ <entry><literal>constraint_schema</literal</entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the schema that contains the constraint</entry>
+ </row>
+
+ <row>
+ <entry><literal>constraint_name</literal</entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the constraint</entry>
+ </row>
+
+ <row>
+ <entry><literal>domain_catalog</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the database that contains the domain (always the current database)</entry>
+ </row>
+
+ <row>
+ <entry><literal>domain_schema</literal</entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the schema that contains the domain</entry>
+ </row>
+
+ <row>
+ <entry><literal>domain_name</literal</entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the domain</entry>
+ </row>
+
+ <row>
+ <entry><literal>is_deferrable</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry><literal>YES</literal> if the constraint is deferrable, <literal>NO</literal> if not</entry>
+ </row>
+
+ <row>
+ <entry><literal>initially_deferred</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry><literal>YES</literal> if the constraint is deferrable and initially deferred, <literal>NO</literal> if not</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </sect1>
+
+ <sect1 id="infoschema-domains">
+ <title><literal>domains</literal></title>
+
+ <para>
+ The view <literal>domains</literal> contains all domains defined in
+ the current database.
+ </para>
+
+ <table>
+ <title><literal>domains</literal> Columns</title>
+
+ <tgroup cols="3">
+ <thead>
+ <row>
+ <entry>Name</entry>
+ <entry>Data Type</entry>
+ <entry>Description</entry>
+ </row>
+ </thead>
+
+ <tbody>
+ <row>
+ <entry><literal>domain_catalog</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the database that contains the domain (always the current database)</entry>
+ </row>
+
+ <row>
+ <entry><literal>domain_schema</literal</entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the schema that contains the domain</entry>
+ </row>
+
+ <row>
+ <entry><literal>domain_name</literal</entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the domain</entry>
+ </row>
+
+ <row>
+ <entry><literal>data_type</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>Data type of the domain</entry>
+ </row>
+
+ <row>
+ <entry><literal>character_maximum_length</literal></entry>
+ <entry><type>cardinal_number</type></entry>
+ <entry>
+ If the domain has a character or bit string type, the declared
+ maximum length; null for all other data types or if no maximum
+ length was declared.
+ </entry>
+ </row>
+
+ <row>
+ <entry><literal>character_octet_length</literal></entry>
+ <entry><type>cardinal_number</type></entry>
+ <entry>
+ If the domain has a character type, the maximum possible length
+ in octets (bytes) of a datum (this should not be of concern to
+ PostgreSQL users); null for all other data types.
+ </entry>
+ </row>
+
+ <row>
+ <entry><literal>character_set_catalog</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Applies to a feature not available in PostgreSQL</entry>
+ </row>
+
+ <row>
+ <entry><literal>character_set_schema</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Applies to a feature not available in PostgreSQL</entry>
+ </row>
+
+ <row>
+ <entry><literal>character_set_name</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Applies to a feature not available in PostgreSQL</entry>
+ </row>
+
+ <row>
+ <entry><literal>collation_catalog</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Applies to a feature not available in PostgreSQL</entry>
+ </row>
+
+ <row>
+ <entry><literal>collation_schema</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Applies to a feature not available in PostgreSQL</entry>
+ </row>
+
+ <row>
+ <entry><literal>collation_name</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Applies to a feature not available in PostgreSQL</entry>
+ </row>
+
+ <row>
+ <entry><literal>numeric_precision</literal></entry>
+ <entry><type>cardinal_number</type></entry>
+ <entry>
+ If the domain has a numeric type, this column contains the
+ (declared or implicit) precision of the type for this column.
+ The precision indicates the number of significant digits. It
+ may be expressed in decimal (base 10) or binary (base 2) terms,
+ as specified in the column
+ <literal>numeric_precision_radix</literal>. For all other data
+ types, this column is null.
+ </entry>
+ </row>
+
+ <row>
+ <entry><literal>numeric_precision_radix</literal></entry>
+ <entry><type>cardinal_number</type></entry>
+ <entry>
+ If the domain has a numeric type, this column indicates in
+ which base the values in the columns
+ <literal>numeric_precision</literal> and
+ <literal>numeric_scale</literal> are expressed. The value is
+ either 2 or 10. For all other data types, this column is null.
+ </entry>
+ </row>
+
+ <row>
+ <entry><literal>numeric_scale</literal></entry>
+ <entry><type>cardinal_number</type></entry>
+ <entry>
+ If the domain has an exact numeric type, this column contains
+ the (declared or implicit) scale of the type for this column.
+ The scale indicates the number of significant digits to the
+ right of the decimal point. It may be expressed in decimal
+ (base 10) or binary (base 2) terms, as specified in the column
+ <literal>numeric_precision_radix</literal>. For all other data
+ types, this column is null.
+ </entry>
+ </row>
+
+ <row>
+ <entry><literal>datetime_precision</literal></entry>
+ <entry><type>cardinal_number</type></entry>
+ <entry>
+ If the domain has a date, time, or interval type, the declared
+ precision; null for all other data types or if no precision was
+ declared.
+ </entry>
+ </row>
+
+ <row>
+ <entry><literal>interval_type</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>Not yet implemented</entry>
+ </row>
+
+ <row>
+ <entry><literal>interval_precision</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>Not yet implemented</entry>
+ </row>
+
+ <row>
+ <entry><literal>domain_default</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>Default expression of the domain</entry>
+ </row>
+
+ <row>
+ <entry><literal>udt_catalog</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the database that the domain data type is defined in (always the current database)</entry>
+ </row>
+
+ <row>
+ <entry><literal>udt_schema</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the schema that the domain data type is defined in</entry>
+ </row>
+
+ <row>
+ <entry><literal>udt_name</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the domain data type</entry>
+ </row>
+
+ <row>
+ <entry><literal>scope_catalog</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Applies to a feature not available in PostgreSQL</entry>
+ </row>
+
+ <row>
+ <entry><literal>scope_schema</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Applies to a feature not available in PostgreSQL</entry>
+ </row>
+
+ <row>
+ <entry><literal>scope_name</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Applies to a feature not available in PostgreSQL</entry>
+ </row>
+
+ <row>
+ <entry><literal>maximum_cardinality</literal></entry>
+ <entry><type>cardinal_number</type></entry>
+ <entry>Applies to a feature not available in PostgreSQL</entry>
+ </row>
+
+ <row>
+ <entry><literal>dtd_identifier</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Applies to a feature not available in PostgreSQL</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </sect1>
+
+ <sect1 id="infoschema-referential-constraints">
+ <title><literal>referential_constraints</literal></title>
+
+ <para>
+ The view <literal>referential_constraints</literal> contains all
+ referential (foreign key) constraints in the current database that
+ belong to a table owned by the current user.
+ </para>
+
+ <table>
+ <title><literal>referential_constraints</literal> Columns</title>
+
+ <tgroup cols="3">
+ <thead>
+ <row>
+ <entry>Name</entry>
+ <entry>Data Type</entry>
+ <entry>Description</entry>
+ </row>
+ </thead>
+
+ <tbody>
+ <row>
+ <entry><literal>constraint_catalog</literal></entry>
+ <entry><literal>sql_identifier</literal></entry>
+ <entry>Name of the database containing the constraint (always the current database)</entry>
+ </row>
+
+ <row>
+ <entry><literal>constraint_schema</literal></entry>
+ <entry><literal>sql_identifier</literal></entry>
+ <entry>Name of the schema containing the constraint</entry>
+ </row>
+
+ <row>
+ <entry><literal>constraint_name</literal></entry>
+ <entry><literal>sql_identifier</literal></entry>
+ <entry>Name of the constraint</entry>
+ </row>
+
+ <row>
+ <entry><literal>unique_constraint_catalog</literal></entry>
+ <entry><literal>sql_identifier</literal></entry>
+ <entry>Not yet implemented</entry>
+ </row>
+
+ <row>
+ <entry><literal>unique_constraint_schema</literal></entry>
+ <entry><literal>sql_identifier</literal></entry>
+ <entry>Not yet implemented</entry>
+ </row>
+
+ <row>
+ <entry><literal>unique_constraint_name</literal></entry>
+ <entry><literal>sql_identifier</literal></entry>
+ <entry>Not yet implemented</entry>
+ </row>
+
+ <row>
+ <entry><literal>match_option</literal></entry>
+ <entry><literal>character_data</literal></entry>
+ <entry>
+ Match option of the referential constraint:
+ <literal>FULL</literal>, <literal>PARTIAL</literal>, or
+ <literal>NONE</literal>.
+ </entry>
+ </row>
+
+ <row>
+ <entry><literal>update_rule</literal></entry>
+ <entry><literal>character_data</literal></entry>
+ <entry>
+ Update rule of the referential constraint:
+ <literal>CASCADE</literal>, <literal>SET NULL</literal>,
+ <literal>SET DEFAULT</literal>, <literal>RESTRICT</literal>,or
+ <literal>NO ACTION</literal>.
+ </entry>
+ </row>
+
+ <row>
+ <entry><literal>delete_rule</literal></entry>
+ <entry><literal>character_data</literal></entry>
+ <entry>
+ Delete rule of the referential constraint:
+ <literal>CASCADE</literal>, <literal>SET NULL</literal>,
+ <literal>SET DEFAULT</literal>, <literal>RESTRICT</literal>,or
+ <literal>NO ACTION</literal>.
+ </entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </sect1>
+
+ <sect1 id="infoschema-schemata">
+ <title><literal>schemata</literal></title>
+
+ <para>
+ The view <literal>schemata</literal> contains all schemas in the
+ current database.
+ </para>
+
+ <table>
+ <title><literal>schemata</literal> Columns</title>
+
+ <tgroup cols="3">
+ <thead>
+ <row>
+ <entry>Name</entry>
+ <entry>Data Type</entry>
+ <entry>Description</entry>
+ </row>
+ </thead>
+
+ <tbody>
+ <row>
+ <entry><literal>catalog_name</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the database that the schema is contained in (always the current database)</entry>
+ </row>
+
+ <row>
+ <entry><literal>schema_name</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the schema</entry>
+ </row>
+
+ <row>
+ <entry><literal>schema_owner</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the owner of the schema</entry>
+ </row>
+
+ <row>
+ <entry><literal>default_character_set_catalog</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Applies to a feature not available in PostgreSQL</entry>
+ </row>
+
+ <row>
+ <entry><literal>default_character_set_schema</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Applies to a feature not available in PostgreSQL</entry>
+ </row>
+
+ <row>
+ <entry><literal>default_character_set_name</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Applies to a feature not available in PostgreSQL</entry>
+ </row>
+
+ <row>
+ <entry><literal>sql_path</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>Applies to a feature not available in PostgreSQL</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </sect1>
+
+ <sect1 id="infoschema-sql-features">
+ <title><literal>sql_features</literal></title>
+
+ <para>
+ The table <literal>sql_features</literal> contains information
+ about which formal features defined in the SQL standard are
+ supported by PostgreSQL. This is the same information that is
+ presented in <xref linkend="features">. There you can also find
+ some additional background information.
+ </para>
+
+ <table>
+ <title><literal>sql_features</literal> Columns</title>
+
+ <tgroup cols="3">
+ <thead>
+ <row>
+ <entry>Name</entry>
+ <entry>Data Type</entry>
+ <entry>Description</entry>
+ </row>
+ </thead>
+
+ <tbody>
+ <row>
+ <entry><literal>feature_id</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>Identifier string of the feature</entry>
+ </row>
+
+ <row>
+ <entry><literal>feature_name</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>Descriptive name of the feature</entry>
+ </row>
+
+ <row>
+ <entry><literal>sub_feature_id</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>Identifier string of the subfeature, or a zero-length string if not a subfeature</entry>
+ </row>
+
+ <row>
+ <entry><literal>sub_feature_name</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>Descriptive name of the subfeature, or a zero-length string if not a subfeature</entry>
+ </row>
+
+ <row>
+ <entry><literal>is_supported</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>
+ <literal>YES</literal> if the feature is fully supported by the
+ current version of PostgreSQL, <literal>NO</literal> if not
+ </entry>
+ </row>
+
+ <row>
+ <entry><literal>is_verified_by</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>
+ Always null, since the PostgreSQL development group does not
+ perform formal testing of feature conformance
+ </entry>
+ </row>
+
+ <row>
+ <entry><literal>comments</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>Possibly a comment about the supported status of the feature</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </sect1>
+
+ <sect1 id="infoschema-sql-implementation-info">
+ <title><literal>sql_implementation_info</literal></title>
+
+ <para>
+ The table <literal>sql_information_info</literal> contains
+ information about various aspects that are left
+ implementation-defined by the SQL standard. This information is
+ primarily intended for use in the context of the ODBC interface;
+ users of other interfaces will probably find this information to be
+ of little use. For this reason, the individual implementation
+ information items are not described here; you will find them in the
+ description of the ODBC interface.
+ </para>
+
+ <table>
+ <title><literal>sql_implementation_info</literal> Columns</title>
+
+ <tgroup cols="3">
+ <thead>
+ <row>
+ <entry>Name</entry>
+ <entry>Data Type</entry>
+ <entry>Description</entry>
+ </row>
+ </thead>
+
+ <tbody>
+ <row>
+ <entry><literal>implementation_info_id</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>Identifier string of the implementation information item</entry>
+ </row>
+
+ <row>
+ <entry><literal>implementation_info_name</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>Descriptive name of the implementation information item</entry>
+ </row>
+
+ <row>
+ <entry><literal>integer_value</literal></entry>
+ <entry><type>cardinal_number</type></entry>
+ <entry>
+ Value of the implementation information item, or null if the
+ value is contained in the column
+ <literal>character_value</literal>
+ </entry>
+ </row>
+
+ <row>
+ <entry><literal>character_value</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>
+ Value of the implementation information item, or null if the
+ value is contained in the column
+ <literal>integer_value</literal>
+ </entry>
+ </row>
+
+ <row>
+ <entry><literal>comments</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>Possibly a comment pertaining to the implementation information item</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </sect1>
+
+ <sect1 id="infoschema-sql-languages">
+ <title><literal>sql_languages</literal></title>
+
+ <para>
+ The table <literal>sql_languages</literal> contains one row for
+ each SQL language binding that is supported by PostgreSQL.
+ PostgreSQL supports direct SQL and embedded SQL in C; that is all
+ you will learn from this table.
+ </para>
+
+ <table>
+ <title><literal>sql_languages</literal> Columns</title>
+
+ <tgroup cols="3">
+ <thead>
+ <row>
+ <entry>Name</entry>
+ <entry>Data Type</entry>
+ <entry>Description</entry>
+ </row>
+ </thead>
+
+ <tbody>
+ <row>
+ <entry><literal>sql_language_source</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>
+ The name of the source of the language definition; always
+ <literal>ISO 9075</literal>, that is, the SQL standard
+ </entry>
+ </row>
+
+ <row>
+ <entry><literal>sql_language_year</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>
+ The year the standard referenced in
+ <literal>sql_language_source</literal> was approved; currently
+ <literal>1999</>
+ </entry>
+ </row>
+
+ <row>
+ <entry><literal>sql_language_comformance</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>
+ The standard conformance level for the language binding. For
+ ISO 9075:1999 this is always <literal>CORE</literal>.
+ </entry>
+ </row>
+
+ <row>
+ <entry><literal>sql_language_integrity</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>Always null (This value is relevant to an earlier version of the SQL standard.)</entry>
+ </row>
+
+ <row>
+ <entry><literal>sql_language_implementation</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>Always null</entry>
+ </row>
+
+ <row>
+ <entry><literal>sql_language_binding_style</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>
+ The language binding style, either <literal>DIRECT</literal> or
+ <literal>EMBEDDED</literal>
+ </entry>
+ </row>
+
+ <row>
+ <entry><literal>sql_language_programming_language</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>
+ The programming language, if the binding style is
+ <literal>EMBEDDED</literal>, else null. PostgreSQL only
+ supports the language C.
+ </entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </sect1>
+
+ <sect1 id="infoschema-sql-packages">
+ <title><literal>sql_packages</literal></title>
+
+ <para>
+ The table <literal>sql_packages</literal> contains information
+ about which features packages defined in the SQL standard are
+ supported by PostgreSQL. Refer to <xref linkend="features"> for
+ background information on feature packages.
+ </para>
+
+ <table>
+ <title><literal>sql_packages</literal> Columns</title>
+
+ <tgroup cols="3">
+ <thead>
+ <row>
+ <entry>Name</entry>
+ <entry>Data Type</entry>
+ <entry>Description</entry>
+ </row>
+ </thead>
+
+ <tbody>
+ <row>
+ <entry><literal>feature_id</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>Identifier string of the package</entry>
+ </row>
+
+ <row>
+ <entry><literal>feature_name</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>Descriptive name of the package</entry>
+ </row>
+
+ <row>
+ <entry><literal>is_supported</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>
+ <literal>YES</literal> if the package is fully supported by the
+ current version of PostgreSQL, <literal>NO</literal> if not
+ </entry>
+ </row>
+
+ <row>
+ <entry><literal>is_verified_by</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>
+ Always null, since the PostgreSQL development group does not
+ perform formal testing of feature conformance
+ </entry>
+ </row>
+
+ <row>
+ <entry><literal>comments</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>Possibly a comment about the supported status of the package</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </sect1>
+
+ <sect1 id="infoschema-sql-sizing">
+ <title><literal>sql_sizing</literal></title>
+
+ <para>
+ The table <literal>sql_sizing</literal> contains information about
+ various size limits and maximum values in PostgreSQL. This
+ information is primarily intended for use in the context of the
+ ODBC interface; users of other interfaces will probably find this
+ information to be of little use. For this reason, the individual
+ sizing items are not described here; you will find them in the
+ description of the ODBC interface.
+ </para>
+
+ <table>
+ <title><literal>sql_sizing</literal> Columns</title>
+
+ <tgroup cols="3">
+ <thead>
+ <row>
+ <entry>Name</entry>
+ <entry>Data Type</entry>
+ <entry>Description</entry>
+ </row>
+ </thead>
+
+ <tbody>
+ <row>
+ <entry><literal>sizing_id</literal></entry>
+ <entry><type>cardinal_number</type></entry>
+ <entry>Identifier of the sizing item</entry>
+ </row>
+
+ <row>
+ <entry><literal>sizing_name</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>Descriptive name of the sizing item</entry>
+ </row>
+
+ <row>
+ <entry><literal>supported_value</literal></entry>
+ <entry><type>cardinal_number</type></entry>
+ <entry>
+ Value of the sizing item, or 0 if the size is unlimited or
+ cannot be determined, or null if the features for which the
+ sizing item is applicable are not supported
+ </entry>
+ </row>
+
+ <row>
+ <entry><literal>comments</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>Possibly a comment pertaining to the sizing item</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </sect1>
+
+ <sect1 id="infoschema-sql-sizing-profiles">
+ <title><literal>sql_sizing_profiles</literal></title>
+
+ <para>
+ The table <literal>sql_sizing_profiles</literal> contains
+ information about the <literal>sql_sizing</literal> values that are
+ required by various profiles of the SQL standard. PostgreSQL does
+ not track any SQL profiles, so this table is empty.
+ </para>
+
+ <table>
+ <title><literal>sql_sizing_profiles</literal> Columns</title>
+
+ <tgroup cols="3">
+ <thead>
+ <row>
+ <entry>Name</entry>
+ <entry>Data Type</entry>
+ <entry>Description</entry>
+ </row>
+ </thead>
+
+ <tbody>
+ <row>
+ <entry><literal>sizing_id</literal></entry>
+ <entry><type>cardinal_number</type></entry>
+ <entry>Identifier of the sizing item</entry>
+ </row>
+
+ <row>
+ <entry><literal>sizing_name</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>Descriptive name of the sizing item</entry>
+ </row>
+
+ <row>
+ <entry><literal>profile_id</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>Identifier string of a profile</entry>
+ </row>
+
+ <row>
+ <entry><literal>required_value</literal></entry>
+ <entry><type>cardinal_number</type></entry>
+ <entry>
+ The value required by the SQL profile for the sizing item, or 0
+ if the profile places no limit on the sizing item, or null if
+ the profile does not require any of the features for which the
+ sizing item is applicable
+ </entry>
+ </row>
+
+ <row>
+ <entry><literal>comments</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>Possibly a comment pertaining to the sizing item within the profile</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </sect1>
+
+ <sect1 id="infoschema-table-constraints">
+ <title><literal>table_constraints</literal></title>
+
+ <para>
+ The view <literal>table_constraints</literal> contains all
+ constraints belonging to tables.
+ </para>
+
+ <table>
+ <title><literal>table_constraints</literal> Columns</title>
+
+ <tgroup cols="3">
+ <thead>
+ <row>
+ <entry>Name</entry>
+ <entry>Data Type</entry>
+ <entry>Description</entry>
+ </row>
+ </thead>
+
+ <tbody>
+ <row>
+ <entry><literal>constraint_catalog</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the database that contains the constraint (always the current database)</entry>
+ </row>
+
+ <row>
+ <entry><literal>constraint_schema</literal</entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the schema that contains the constraint</entry>
+ </row>
+
+ <row>
+ <entry><literal>constraint_name</literal</entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the constraint</entry>
+ </row>
+
+ <row>
+ <entry><literal>table_catalog</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the database that contains the table (always the current database)</entry>
+ </row>
+
+ <row>
+ <entry><literal>table_schema</literal</entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the schema that contains the table</entry>
+ </row>
+
+ <row>
+ <entry><literal>table_name</literal</entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the table</entry>
+ </row>
+
+ <row>
+ <entry><literal>constraint_type</literal</entry>
+ <entry><type>character_data</type></entry>
+ <entry>
+ Type of the constraint: <literal>CHECK</literal>,
+ <literal>FOREIGN KEY</literal>, <literal>PRIMARY KEY</literal>,
+ or <literal>UNIQUE</literal>
+ </entry>
+ </row>
+
+ <row>
+ <entry><literal>is_deferrable</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry><literal>YES</literal> if the constraint is deferrable, <literal>NO</literal> if not</entry>
+ </row>
+
+ <row>
+ <entry><literal>initially_deferred</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry><literal>YES</literal> if the constraint is deferrable and initially deferred, <literal>NO</literal> if not</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </sect1>
+
+ <sect1 id="infoschema-table-privileges">
+ <title><literal>table_privileges</literal></title>
+
+ <para>
+ The view <literal>table_privileges</literal> identifies all
+ privileges granted on tables to the current user or by the current
+ user. There is one row for each combination of table, grantor, and
+ grantee.
+ </para>
+
+ <table>
+ <title><literal>table_privileges</literal> Columns</title>
+
+ <tgroup cols="3">
+ <thead>
+ <row>
+ <entry>Name</entry>
+ <entry>Data Type</entry>
+ <entry>Description</entry>
+ </row>
+ </thead>
+
+ <tbody>
+ <row>
+ <entry><literal>grantor</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the user that granted the privileges</entry>
+ </row>
+
+ <row>
+ <entry><literal>grantee</literal</entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the user that the privilege was granted to</entry>
+ </row>
+
+ <row>
+ <entry><literal>table_catalog</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the database that contains the table (always the current database)</entry>
+ </row>
+
+ <row>
+ <entry><literal>table_schema</literal</entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the schema that contains the table</entry>
+ </row>
+
+ <row>
+ <entry><literal>table_name</literal</entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the table</entry>
+ </row>
+
+ <row>
+ <entry><literal>privilege_type</literal</entry>
+ <entry><type>character_data</type></entry>
+ <entry>
+ Type of the privilege: <literal>SELECT</literal>,
+ <literal>DELETE</literal>, <literal>INSERT</literal>,
+ <literal>UPDATE</literal>, <literal>REFERENCES</literal>, or
+ <literal>TRIGGER</literal>
+ </entry>
+ </row>
+
+ <row>
+ <entry><literal>is_grantable</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry><literal>YES</literal> if the privilege is grantable, <literal>NO</literal> if not</entry>
+ </row>
+
+ <row>
+ <entry><literal>with_hierarchy</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>Applies to a feature not available in PostgreSQL</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </sect1>
+
+ <sect1 id="infoschema-tables">
+ <title><literal>tables</literal></title>
+
+ <para>
+ The view <literal>tables</literal> contains all tables and views
+ defined in the current database.
+ </para>
+
+ <table>
+ <title><literal>tables</literal> Columns</title>
+
+ <tgroup cols="3">
+ <thead>
+ <row>
+ <entry>Name</entry>
+ <entry>Data Type</entry>
+ <entry>Description</entry>
+ </row>
+ </thead>
+
+ <tbody>
+ <row>
+ <entry><literal>table_catalog</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the database that contains the table (always the current database)</entry>
+ </row>
+
+ <row>
+ <entry><literal>table_schema</literal</entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the schema that contains the table</entry>
+ </row>
+
+ <row>
+ <entry><literal>table_name</literal</entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the table</entry>
+ </row>
+
+ <row>
+ <entry><literal>table_type</literal</entry>
+ <entry><type>character_data</type></entry>
+ <entry>
+ Type of the table: <literal>BASE TABLE</literal> for a
+ persistent base table (the normal table type),
+ <literal>VIEW</literal> for a view, or <literal>LOCAL
+ TEMPORARY</literal> for a temporary table
+ </entry>
+ </row>
+
+ <row>
+ <entry><literal>self_referencing_column_name</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Applies to a feature not available in PostgreSQL</entry>
+ </row>
+
+ <row>
+ <entry><literal>reference_generation</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>Applies to a feature not available in PostgreSQL</entry>
+ </row>
+
+ <row>
+ <entry><literal>user_defined_type_catalog</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Applies to a feature not available in PostgreSQL</entry>
+ </row>
+
+ <row>
+ <entry><literal>user_defined_type_schema</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Applies to a feature not available in PostgreSQL</entry>
+ </row>
+
+ <row>
+ <entry><literal>user_defined_type_name</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Applies to a feature not available in PostgreSQL</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </sect1>
+
+ <sect1 id="infoschema-views">
+ <title><literal>views</literal></title>
+
+ <para>
+ The view <literal>views</literal> contains all views defined in the
+ current database.
+ </para>
+
+ <table>
+ <title><literal>views</literal> Columns</title>
+
+ <tgroup cols="3">
+ <thead>
+ <row>
+ <entry>Name</entry>
+ <entry>Data Type</entry>
+ <entry>Description</entry>
+ </row>
+ </thead>
+
+ <tbody>
+ <row>
+ <entry><literal>table_catalog</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the database that contains the view (always the current database)</entry>
+ </row>
+
+ <row>
+ <entry><literal>table_schema</literal</entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the schema that contains the view</entry>
+ </row>
+
+ <row>
+ <entry><literal>table_name</literal</entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>Name of the view</entry>
+ </row>
+
+ <row>
+ <entry><literal>view definition</literal</entry>
+ <entry><type>character_data</type></entry>
+ <entry>
+ Query expression defining the view (null if the current user is
+ not the owner of the view)
+ </entry>
+ </row>
+
+ <row>
+ <entry><literal>check_option</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>Applies to a feature not available in PostgreSQL</entry>
+ </row>
+
+ <row>
+ <entry><literal>is_updatable</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>Not yet implemented</entry>
+ </row>
+
+ <row>
+ <entry><literal>is_insertable_into</literal></entry>
+ <entry><type>character_data</type></entry>
+ <entry>Not yet implemented</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </sect1>
+
+</chapter>
projects / postgresql.git / commitdiff