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📄 ABORT.7(2.17 KB)
📄 ALTER_AGGREGATE.7(4.97 KB)
📄 ALTER_COLLATION.7(2.8 KB)
📄 ALTER_CONVERSION.7(2.89 KB)
📄 ALTER_DATABASE.7(5.71 KB)
📄 ALTER_DEFAULT_PRIVILEGES.7(6.34 KB)
📄 ALTER_DOMAIN.7(6.96 KB)
📄 ALTER_EVENT_TRIGGER.7(2.42 KB)
📄 ALTER_EXTENSION.7(6.89 KB)
📄 ALTER_FOREIGN_DATA_WRAPPER.7(4.56 KB)
📄 ALTER_FOREIGN_TABLE.7(12.8 KB)
📄 ALTER_FUNCTION.7(8.26 KB)
📄 ALTER_GROUP.7(3.08 KB)
📄 ALTER_INDEX.7(5.59 KB)
📄 ALTER_LANGUAGE.7(2.1 KB)
📄 ALTER_LARGE_OBJECT.7(1.97 KB)
📄 ALTER_MATERIALIZED_VIEW.7(4.66 KB)
📄 ALTER_OPERATOR.7(3.67 KB)
📄 ALTER_OPERATOR_CLASS.7(2.86 KB)
📄 ALTER_OPERATOR_FAMILY.7(9.12 KB)
📄 ALTER_POLICY.7(2.88 KB)
📄 ALTER_ROLE.7(9.04 KB)
📄 ALTER_RULE.7(2.21 KB)
📄 ALTER_SCHEMA.7(2.31 KB)
📄 ALTER_SEQUENCE.7(7.53 KB)
📄 ALTER_SERVER.7(3.41 KB)
📄 ALTER_SYSTEM.7(3.8 KB)
📄 ALTER_TABLE.7(35.2 KB)
📄 ALTER_TABLESPACE.7(3.35 KB)
📄 ALTER_TEXT_SEARCH_CONFIGURATION.7(4.79 KB)
📄 ALTER_TEXT_SEARCH_DICTIONARY.7(4.02 KB)
📄 ALTER_TEXT_SEARCH_PARSER.7(2.23 KB)
📄 ALTER_TEXT_SEARCH_TEMPLATE.7(2.26 KB)
📄 ALTER_TRIGGER.7(2.98 KB)
📄 ALTER_TYPE.7(7.15 KB)
📄 ALTER_USER.7(2.66 KB)
📄 ALTER_USER_MAPPING.7(3.26 KB)
📄 ALTER_VIEW.7(4.67 KB)
📄 ANALYZE.7(7.67 KB)
📄 BEGIN.7(4.06 KB)
📄 CHECKPOINT.7(2.29 KB)
📄 CLOSE.7(2.72 KB)
📄 CLUSTER.7(6.23 KB)
📄 COMMENT.7(10.2 KB)
📄 COMMIT.7(2.1 KB)
📄 COMMIT_PREPARED.7(2.58 KB)
📄 COPY.7(29.88 KB)
📄 CREATE_ACCESS_METHOD.7(2.9 KB)
📄 CREATE_AGGREGATE.7(23.35 KB)
📄 CREATE_CAST.7(13.55 KB)
📄 CREATE_COLLATION.7(3.97 KB)
📄 CREATE_CONVERSION.7(3.78 KB)
📄 CREATE_DATABASE.7(8.48 KB)
📄 CREATE_DOMAIN.7(6.52 KB)
📄 CREATE_EVENT_TRIGGER.7(3.74 KB)
📄 CREATE_EXTENSION.7(6.57 KB)
📄 CREATE_FOREIGN_DATA_WRAPPER.7(4.96 KB)
📄 CREATE_FOREIGN_TABLE.7(9 KB)
📄 CREATE_FUNCTION.7(24.73 KB)
📄 CREATE_GROUP.7(2.11 KB)
📄 CREATE_INDEX.7(19.56 KB)
📄 CREATE_LANGUAGE.7(9.83 KB)
📄 CREATE_MATERIALIZED_VIEW.7(4.21 KB)
📄 CREATE_OPERATOR.7(6.88 KB)
📄 CREATE_OPERATOR_CLASS.7(8.52 KB)
📄 CREATE_OPERATOR_FAMILY.7(3.6 KB)
📄 CREATE_POLICY.7(15.92 KB)
📄 CREATE_ROLE.7(12.69 KB)
📄 CREATE_RULE.7(8.63 KB)
📄 CREATE_SCHEMA.7(6.15 KB)
📄 CREATE_SEQUENCE.7(9.79 KB)
📄 CREATE_SERVER.7(3.63 KB)
📄 CREATE_TABLE.7(42.1 KB)
📄 CREATE_TABLESPACE.7(4.47 KB)
📄 CREATE_TABLE_AS.7(7.8 KB)
📄 CREATE_TEXT_SEARCH_CONFIGURATION.7(3.19 KB)
📄 CREATE_TEXT_SEARCH_DICTIONARY.7(3.34 KB)
📄 CREATE_TEXT_SEARCH_PARSER.7(3.56 KB)
📄 CREATE_TEXT_SEARCH_TEMPLATE.7(3.38 KB)
📄 CREATE_TRANSFORM.7(5.79 KB)
📄 CREATE_TRIGGER.7(16.3 KB)
📄 CREATE_TYPE.7(28.96 KB)
📄 CREATE_USER.7(2.45 KB)
📄 CREATE_USER_MAPPING.7(3.27 KB)
📄 CREATE_VIEW.7(14.63 KB)
📄 DEALLOCATE.7(1.98 KB)
📄 DECLARE.7(10.22 KB)
📄 DELETE.7(7.36 KB)
📄 DISCARD.7(2.81 KB)
📄 DO.7(3.08 KB)
📄 DROP_ACCESS_METHOD.7(2.35 KB)
📄 DROP_AGGREGATE.7(3.8 KB)
📄 DROP_CAST.7(2.26 KB)
📄 DROP_COLLATION.7(2.42 KB)
📄 DROP_CONVERSION.7(2.36 KB)
📄 DROP_DATABASE.7(2.38 KB)
📄 DROP_DOMAIN.7(2.34 KB)
📄 DROP_EVENT_TRIGGER.7(2.38 KB)
📄 DROP_EXTENSION.7(2.73 KB)
📄 DROP_FOREIGN_DATA_WRAPPER.7(2.61 KB)
📄 DROP_FOREIGN_TABLE.7(2.59 KB)
📄 DROP_FUNCTION.7(3.35 KB)
📄 DROP_GROUP.7(1.57 KB)
📄 DROP_INDEX.7(3.08 KB)
📄 DROP_LANGUAGE.7(2.86 KB)
📄 DROP_MATERIALIZED_VIEW.7(2.64 KB)
📄 DROP_OPERATOR.7(3.01 KB)
📄 DROP_OPERATOR_CLASS.7(3.48 KB)
📄 DROP_OPERATOR_FAMILY.7(3.24 KB)
📄 DROP_OWNED.7(3.14 KB)
📄 DROP_POLICY.7(2.53 KB)
📄 DROP_ROLE.7(3.05 KB)
📄 DROP_RULE.7(2.35 KB)
📄 DROP_SCHEMA.7(2.76 KB)
📄 DROP_SEQUENCE.7(2.46 KB)
📄 DROP_SERVER.7(2.39 KB)
📄 DROP_TABLE.7(2.97 KB)
📄 DROP_TABLESPACE.7(2.48 KB)
📄 DROP_TEXT_SEARCH_CONFIGURATION.7(2.83 KB)
📄 DROP_TEXT_SEARCH_DICTIONARY.7(2.75 KB)
📄 DROP_TEXT_SEARCH_PARSER.7(2.66 KB)
📄 DROP_TEXT_SEARCH_TEMPLATE.7(2.69 KB)
📄 DROP_TRANSFORM.7(2.59 KB)
📄 DROP_TRIGGER.7(2.6 KB)
📄 DROP_TYPE.7(2.53 KB)
📄 DROP_USER.7(1.65 KB)
📄 DROP_USER_MAPPING.7(2.56 KB)
📄 DROP_VIEW.7(2.43 KB)
📄 END.7(2.19 KB)
📄 EXECUTE.7(2.9 KB)
📄 EXPLAIN.7(13.03 KB)
📄 FETCH.7(8.48 KB)
📄 GRANT.7(21.29 KB)
📄 IMPORT_FOREIGN_SCHEMA.7(3.98 KB)
📄 INSERT.7(19.61 KB)
📄 LISTEN.7(3.51 KB)
📄 LOAD.7(2.54 KB)
📄 LOCK.7(8.01 KB)
📄 MOVE.7(2.92 KB)
📄 NOTIFY.7(8.21 KB)
📄 PREPARE.7(8.2 KB)
📄 PREPARE_TRANSACTION.7(5.74 KB)
📄 REASSIGN_OWNED.7(3.01 KB)
📄 REFRESH_MATERIALIZED_VIEW.7(3.92 KB)
📄 REINDEX.7(7.69 KB)
📄 RELEASE_SAVEPOINT.7(3 KB)
📄 RESET.7(2.93 KB)
📄 REVOKE.7(10.44 KB)
📄 ROLLBACK.7(2.09 KB)
📄 ROLLBACK_PREPARED.7(2.6 KB)
📄 ROLLBACK_TO_SAVEPOINT.7(3.94 KB)
📄 SAVEPOINT.7(3.5 KB)
📄 SECURITY_LABEL.7(5.39 KB)
📄 SELECT.7(63.33 KB)
📄 SELECT_INTO.7(4.37 KB)
📄 SET.7(7.57 KB)
📄 SET_CONSTRAINTS.7(4.48 KB)
📄 SET_ROLE.7(4.36 KB)
📄 SET_SESSION_AUTHORIZATION.7(3.88 KB)
📄 SET_TRANSACTION.7(8.27 KB)
📄 SHOW.7(4.22 KB)
📄 START_TRANSACTION.7(2.9 KB)
📄 TABLE.7(18 B)
📄 TRUNCATE.7(6.39 KB)
📄 UNLISTEN.7(2.75 KB)
📄 UPDATE.7(12.26 KB)
📄 VACUUM.7(7.92 KB)
📄 VALUES.7(6.94 KB)
📄 WITH.7(18 B)

Editing: ALTER_TYPE.7

'\" t
.\"     Title: ALTER TYPE
.\"    Author: The PostgreSQL Global Development Group
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: 2018
.\"    Manual: PostgreSQL 9.6.9 Documentation
.\"    Source: PostgreSQL 9.6.9
.\"  Language: English
.\"
.TH "ALTER TYPE" "7" "2018" "PostgreSQL 9.6.9" "PostgreSQL 9.6.9 Documentation"
.\" -----------------------------------------------------------------
.\" * Define some portability stuff
.\" -----------------------------------------------------------------
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.\" http://bugs.debian.org/507673
.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.ie \n(.g .ds Aq \(aq
.el       .ds Aq '
.\" -----------------------------------------------------------------
.\" * set default formatting
.\" -----------------------------------------------------------------
.\" disable hyphenation
.nh
.\" disable justification (adjust text to left margin only)
.ad l
.\" -----------------------------------------------------------------
.\" * MAIN CONTENT STARTS HERE *
.\" -----------------------------------------------------------------
.SH "NAME"
ALTER_TYPE \- change the definition of a type
.SH "SYNOPSIS"
.sp
.nf
ALTER TYPE \fIname\fR \fIaction\fR [, \&.\&.\&. ]
ALTER TYPE \fIname\fR OWNER TO { \fInew_owner\fR | CURRENT_USER | SESSION_USER }
ALTER TYPE \fIname\fR RENAME ATTRIBUTE \fIattribute_name\fR TO \fInew_attribute_name\fR [ CASCADE | RESTRICT ]
ALTER TYPE \fIname\fR RENAME TO \fInew_name\fR
ALTER TYPE \fIname\fR SET SCHEMA \fInew_schema\fR
ALTER TYPE \fIname\fR ADD VALUE [ IF NOT EXISTS ] \fInew_enum_value\fR [ { BEFORE | AFTER } \fIexisting_enum_value\fR ]

where \fIaction\fR is one of:

ADD ATTRIBUTE \fIattribute_name\fR \fIdata_type\fR [ COLLATE \fIcollation\fR ] [ CASCADE | RESTRICT ]
    DROP ATTRIBUTE [ IF EXISTS ] \fIattribute_name\fR [ CASCADE | RESTRICT ]
    ALTER ATTRIBUTE \fIattribute_name\fR [ SET DATA ] TYPE \fIdata_type\fR [ COLLATE \fIcollation\fR ] [ CASCADE | RESTRICT ]
.fi
.SH "DESCRIPTION"
.PP
\fBALTER TYPE\fR
changes the definition of an existing type\&. There are several subforms:
.PP
ADD ATTRIBUTE
.RS 4
This form adds a new attribute to a composite type, using the same syntax as
CREATE TYPE (\fBCREATE_TYPE\fR(7))\&.
.RE
.PP
DROP ATTRIBUTE [ IF EXISTS ]
.RS 4
This form drops an attribute from a composite type\&. If
IF EXISTS
is specified and the attribute does not exist, no error is thrown\&. In this case a notice is issued instead\&.
.RE
.PP
SET DATA TYPE
.RS 4
This form changes the type of an attribute of a composite type\&.
.RE
.PP
OWNER
.RS 4
This form changes the owner of the type\&.
.RE
.PP
RENAME
.RS 4
This form changes the name of the type or the name of an individual attribute of a composite type\&.
.RE
.PP
SET SCHEMA
.RS 4
This form moves the type into another schema\&.
.RE
.PP
ADD VALUE [ IF NOT EXISTS ] [ BEFORE | AFTER ]
.RS 4
This form adds a new value to an enum type\&. The new value\*(Aqs place in the enum\*(Aqs ordering can be specified as being
BEFORE
or
AFTER
one of the existing values\&. Otherwise, the new item is added at the end of the list of values\&.
.sp
If
IF NOT EXISTS
is specified, it is not an error if the type already contains the new value: a notice is issued but no other action is taken\&. Otherwise, an error will occur if the new value is already present\&.
.RE
.PP
CASCADE
.RS 4
Automatically propagate the operation to typed tables of the type being altered, and their descendants\&.
.RE
.PP
RESTRICT
.RS 4
Refuse the operation if the type being altered is the type of a typed table\&. This is the default\&.
.RE
.PP
The
ADD ATTRIBUTE,
DROP ATTRIBUTE, and
ALTER ATTRIBUTE
actions can be combined into a list of multiple alterations to apply in parallel\&. For example, it is possible to add several attributes and/or alter the type of several attributes in a single command\&.
.PP
You must own the type to use
\fBALTER TYPE\fR\&. To change the schema of a type, you must also have
CREATE
privilege on the new schema\&. To alter the owner, you must also be a direct or indirect member of the new owning role, and that role must have
CREATE
privilege on the type\*(Aqs schema\&. (These restrictions enforce that altering the owner doesn\*(Aqt do anything you couldn\*(Aqt do by dropping and recreating the type\&. However, a superuser can alter ownership of any type anyway\&.) To add an attribute or alter an attribute type, you must also have
USAGE
privilege on the data type\&.
.SH "PARAMETERS"
.PP
.PP
\fIname\fR
.RS 4
The name (possibly schema\-qualified) of an existing type to alter\&.
.RE
.PP
\fInew_name\fR
.RS 4
The new name for the type\&.
.RE
.PP
\fInew_owner\fR
.RS 4
The user name of the new owner of the type\&.
.RE
.PP
\fInew_schema\fR
.RS 4
The new schema for the type\&.
.RE
.PP
\fIattribute_name\fR
.RS 4
The name of the attribute to add, alter, or drop\&.
.RE
.PP
\fInew_attribute_name\fR
.RS 4
The new name of the attribute to be renamed\&.
.RE
.PP
\fIdata_type\fR
.RS 4
The data type of the attribute to add, or the new type of the attribute to alter\&.
.RE
.PP
\fInew_enum_value\fR
.RS 4
The new value to be added to an enum type\*(Aqs list of values\&. Like all enum literals, it needs to be quoted\&.
.RE
.PP
\fIexisting_enum_value\fR
.RS 4
The existing enum value that the new value should be added immediately before or after in the enum type\*(Aqs sort ordering\&. Like all enum literals, it needs to be quoted\&.
.RE
.SH "NOTES"
.PP
\fBALTER TYPE \&.\&.\&. ADD VALUE\fR
(the form that adds a new value to an enum type) cannot be executed inside a transaction block\&.
.PP
Comparisons involving an added enum value will sometimes be slower than comparisons involving only original members of the enum type\&. This will usually only occur if
BEFORE
or
AFTER
is used to set the new value\*(Aqs sort position somewhere other than at the end of the list\&. However, sometimes it will happen even though the new value is added at the end (this occurs if the OID counter
\(lqwrapped around\(rq
since the original creation of the enum type)\&. The slowdown is usually insignificant; but if it matters, optimal performance can be regained by dropping and recreating the enum type, or by dumping and reloading the database\&.
.SH "EXAMPLES"
.PP
To rename a data type:
.sp
.if n \{\
.RS 4
.\}
.nf
ALTER TYPE electronic_mail RENAME TO email;
.fi
.if n \{\
.RE
.\}
.PP
To change the owner of the type
email
to
joe:
.sp
.if n \{\
.RS 4
.\}
.nf
ALTER TYPE email OWNER TO joe;
.fi
.if n \{\
.RE
.\}
.PP
To change the schema of the type
email
to
customers:
.sp
.if n \{\
.RS 4
.\}
.nf
ALTER TYPE email SET SCHEMA customers;
.fi
.if n \{\
.RE
.\}
.PP
To add a new attribute to a type:
.sp
.if n \{\
.RS 4
.\}
.nf
ALTER TYPE compfoo ADD ATTRIBUTE f3 int;
.fi
.if n \{\
.RE
.\}
.PP
To add a new value to an enum type in a particular sort position:
.sp
.if n \{\
.RS 4
.\}
.nf
ALTER TYPE colors ADD VALUE \*(Aqorange\*(Aq AFTER \*(Aqred\*(Aq;
.fi
.if n \{\
.RE
.\}
.SH "COMPATIBILITY"
.PP
The variants to add and drop attributes are part of the SQL standard; the other variants are PostgreSQL extensions\&.
.SH "SEE ALSO"
CREATE TYPE (\fBCREATE_TYPE\fR(7)), DROP TYPE (\fBDROP_TYPE\fR(7))

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