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diff --git a/doc/src/sgml/html/infoschema-attributes.html b/doc/src/sgml/html/infoschema-attributes.html new file mode 100644 index 0000000..98116e5 --- /dev/null +++ b/doc/src/sgml/html/infoschema-attributes.html @@ -0,0 +1,226 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>36.6. attributes</title><link rel="stylesheet" type="text/css" href="stylesheet.css" /><link rev="made" href="pgsql-docs@lists.postgresql.org" /><meta name="generator" content="DocBook XSL Stylesheets V1.79.1" /><link rel="prev" href="infoschema-applicable-roles.html" title="36.5. applicable_roles" /><link rel="next" href="infoschema-character-sets.html" title="36.7. character_sets" /></head><body id="docContent" class="container-fluid col-10"><div xmlns="http://www.w3.org/TR/xhtml1/transitional" class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">36.6. <code xmlns="http://www.w3.org/1999/xhtml" class="literal">attributes</code></th></tr><tr><td width="10%" align="left"><a accesskey="p" href="infoschema-applicable-roles.html" title="36.5. applicable_roles">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="information-schema.html" title="Chapter 36. The Information Schema">Up</a></td><th width="60%" align="center">Chapter 36. The Information Schema</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 13.4 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="infoschema-character-sets.html" title="36.7. character_sets">Next</a></td></tr></table><hr></hr></div><div class="sect1" id="INFOSCHEMA-ATTRIBUTES"><div class="titlepage"><div><div><h2 class="title" style="clear: both">36.6. <code class="literal">attributes</code></h2></div></div></div><p> + The view <code class="literal">attributes</code> contains information about + the attributes of composite data types defined in the database. + (Note that the view does not give information about table columns, + which are sometimes called attributes in PostgreSQL contexts.) + Only those attributes are shown that the current user has access to (by way + of being the owner of or having some privilege on the type). + </p><div class="table" id="id-1.7.6.10.3"><p class="title"><strong>Table 36.4. <code class="structname">attributes</code> Columns</strong></p><div class="table-contents"><table class="table" summary="attributes Columns" border="1"><colgroup><col /></colgroup><thead><tr><th class="catalog_table_entry"><p class="column_definition"> + Column Type + </p> + <p> + Description + </p></th></tr></thead><tbody><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">udt_catalog</code> <code class="type">sql_identifier</code> + </p> + <p> + Name of the database containing the data type (always the current database) + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">udt_schema</code> <code class="type">sql_identifier</code> + </p> + <p> + Name of the schema containing the data type + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">udt_name</code> <code class="type">sql_identifier</code> + </p> + <p> + Name of the data type + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">attribute_name</code> <code class="type">sql_identifier</code> + </p> + <p> + Name of the attribute + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">ordinal_position</code> <code class="type">cardinal_number</code> + </p> + <p> + Ordinal position of the attribute within the data type (count starts at 1) + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">attribute_default</code> <code class="type">character_data</code> + </p> + <p> + Default expression of the attribute + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">is_nullable</code> <code class="type">yes_or_no</code> + </p> + <p> + <code class="literal">YES</code> if the attribute is possibly nullable, + <code class="literal">NO</code> if it is known not nullable. + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">data_type</code> <code class="type">character_data</code> + </p> + <p> + Data type of the attribute, if it is a built-in type, or + <code class="literal">ARRAY</code> if it is some array (in that case, see + the view <code class="literal">element_types</code>), else + <code class="literal">USER-DEFINED</code> (in that case, the type is + identified in <code class="literal">attribute_udt_name</code> and + associated columns). + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">character_maximum_length</code> <code class="type">cardinal_number</code> + </p> + <p> + If <code class="literal">data_type</code> identifies a character or bit + string type, the declared maximum length; null for all other + data types or if no maximum length was declared. + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">character_octet_length</code> <code class="type">cardinal_number</code> + </p> + <p> + If <code class="literal">data_type</code> identifies a character type, + the maximum possible length in octets (bytes) of a datum; null + for all other data types. The maximum octet length depends on + the declared character maximum length (see above) and the + server encoding. + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">character_set_catalog</code> <code class="type">sql_identifier</code> + </p> + <p> + Applies to a feature not available in <span class="productname">PostgreSQL</span> + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">character_set_schema</code> <code class="type">sql_identifier</code> + </p> + <p> + Applies to a feature not available in <span class="productname">PostgreSQL</span> + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">character_set_name</code> <code class="type">sql_identifier</code> + </p> + <p> + Applies to a feature not available in <span class="productname">PostgreSQL</span> + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">collation_catalog</code> <code class="type">sql_identifier</code> + </p> + <p> + Name of the database containing the collation of the attribute + (always the current database), null if default or the data type + of the attribute is not collatable + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">collation_schema</code> <code class="type">sql_identifier</code> + </p> + <p> + Name of the schema containing the collation of the attribute, + null if default or the data type of the attribute is not + collatable + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">collation_name</code> <code class="type">sql_identifier</code> + </p> + <p> + Name of the collation of the attribute, null if default or the + data type of the attribute is not collatable + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">numeric_precision</code> <code class="type">cardinal_number</code> + </p> + <p> + If <code class="literal">data_type</code> identifies a numeric type, this + column contains the (declared or implicit) precision of the + type for this attribute. The precision indicates the number of + significant digits. It can be expressed in decimal (base 10) + or binary (base 2) terms, as specified in the column + <code class="literal">numeric_precision_radix</code>. For all other data + types, this column is null. + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">numeric_precision_radix</code> <code class="type">cardinal_number</code> + </p> + <p> + If <code class="literal">data_type</code> identifies a numeric type, this + column indicates in which base the values in the columns + <code class="literal">numeric_precision</code> and + <code class="literal">numeric_scale</code> are expressed. The value is + either 2 or 10. For all other data types, this column is null. + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">numeric_scale</code> <code class="type">cardinal_number</code> + </p> + <p> + If <code class="literal">data_type</code> identifies an exact numeric + type, this column contains the (declared or implicit) scale of + the type for this attribute. The scale indicates the number of + significant digits to the right of the decimal point. It can + be expressed in decimal (base 10) or binary (base 2) terms, as + specified in the column + <code class="literal">numeric_precision_radix</code>. For all other data + types, this column is null. + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">datetime_precision</code> <code class="type">cardinal_number</code> + </p> + <p> + If <code class="literal">data_type</code> identifies a date, time, + timestamp, or interval type, this column contains the (declared + or implicit) fractional seconds precision of the type for this + attribute, that is, the number of decimal digits maintained + following the decimal point in the seconds value. For all + other data types, this column is null. + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">interval_type</code> <code class="type">character_data</code> + </p> + <p> + If <code class="literal">data_type</code> identifies an interval type, + this column contains the specification which fields the + intervals include for this attribute, e.g., <code class="literal">YEAR TO + MONTH</code>, <code class="literal">DAY TO SECOND</code>, etc. If no + field restrictions were specified (that is, the interval + accepts all fields), and for all other data types, this field + is null. + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">interval_precision</code> <code class="type">cardinal_number</code> + </p> + <p> + Applies to a feature not available + in <span class="productname">PostgreSQL</span> + (see <code class="literal">datetime_precision</code> for the fractional + seconds precision of interval type attributes) + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">attribute_udt_catalog</code> <code class="type">sql_identifier</code> + </p> + <p> + Name of the database that the attribute data type is defined in + (always the current database) + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">attribute_udt_schema</code> <code class="type">sql_identifier</code> + </p> + <p> + Name of the schema that the attribute data type is defined in + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">attribute_udt_name</code> <code class="type">sql_identifier</code> + </p> + <p> + Name of the attribute data type + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">scope_catalog</code> <code class="type">sql_identifier</code> + </p> + <p> + Applies to a feature not available in <span class="productname">PostgreSQL</span> + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">scope_schema</code> <code class="type">sql_identifier</code> + </p> + <p> + Applies to a feature not available in <span class="productname">PostgreSQL</span> + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">scope_name</code> <code class="type">sql_identifier</code> + </p> + <p> + Applies to a feature not available in <span class="productname">PostgreSQL</span> + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">maximum_cardinality</code> <code class="type">cardinal_number</code> + </p> + <p> + Always null, because arrays always have unlimited maximum cardinality in <span class="productname">PostgreSQL</span> + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">dtd_identifier</code> <code class="type">sql_identifier</code> + </p> + <p> + An identifier of the data type descriptor of the column, unique + among the data type descriptors pertaining to the table. This + is mainly useful for joining with other instances of such + identifiers. (The specific format of the identifier is not + defined and not guaranteed to remain the same in future + versions.) + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">is_derived_reference_attribute</code> <code class="type">yes_or_no</code> + </p> + <p> + Applies to a feature not available in <span class="productname">PostgreSQL</span> + </p></td></tr></tbody></table></div></div><br class="table-break" /><p> + See also under <a class="xref" href="infoschema-columns.html" title="36.17. columns">Section 36.17</a>, a similarly + structured view, for further information on some of the columns. + </p></div><div xmlns="http://www.w3.org/TR/xhtml1/transitional" class="navfooter"><hr></hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="infoschema-applicable-roles.html" title="36.5. applicable_roles">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="information-schema.html" title="Chapter 36. 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