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diff --git a/doc/src/sgml/man7/ALTER_VIEW.7 b/doc/src/sgml/man7/ALTER_VIEW.7 new file mode 100644 index 0000000..bdf3bbb --- /dev/null +++ b/doc/src/sgml/man7/ALTER_VIEW.7 @@ -0,0 +1,170 @@ +'\" t +.\" Title: ALTER VIEW +.\" Author: The PostgreSQL Global Development Group +.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/> +.\" Date: 2021 +.\" Manual: PostgreSQL 13.4 Documentation +.\" Source: PostgreSQL 13.4 +.\" Language: English +.\" +.TH "ALTER VIEW" "7" "2021" "PostgreSQL 13.4" "PostgreSQL 13.4 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_VIEW \- change the definition of a view +.SH "SYNOPSIS" +.sp +.nf +ALTER VIEW [ IF EXISTS ] \fIname\fR ALTER [ COLUMN ] \fIcolumn_name\fR SET DEFAULT \fIexpression\fR +ALTER VIEW [ IF EXISTS ] \fIname\fR ALTER [ COLUMN ] \fIcolumn_name\fR DROP DEFAULT +ALTER VIEW [ IF EXISTS ] \fIname\fR OWNER TO { \fInew_owner\fR | CURRENT_USER | SESSION_USER } +ALTER VIEW [ IF EXISTS ] \fIname\fR RENAME [ COLUMN ] \fIcolumn_name\fR TO \fInew_column_name\fR +ALTER VIEW [ IF EXISTS ] \fIname\fR RENAME TO \fInew_name\fR +ALTER VIEW [ IF EXISTS ] \fIname\fR SET SCHEMA \fInew_schema\fR +ALTER VIEW [ IF EXISTS ] \fIname\fR SET ( \fIview_option_name\fR [= \fIview_option_value\fR] [, \&.\&.\&. ] ) +ALTER VIEW [ IF EXISTS ] \fIname\fR RESET ( \fIview_option_name\fR [, \&.\&.\&. ] ) +.fi +.SH "DESCRIPTION" +.PP +\fBALTER VIEW\fR +changes various auxiliary properties of a view\&. (If you want to modify the view\*(Aqs defining query, use +\fBCREATE OR REPLACE VIEW\fR\&.) +.PP +You must own the view to use +\fBALTER VIEW\fR\&. To change a view\*(Aqs schema, 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 view\*(Aqs schema\&. (These restrictions enforce that altering the owner doesn\*(Aqt do anything you couldn\*(Aqt do by dropping and recreating the view\&. However, a superuser can alter ownership of any view anyway\&.) +.SH "PARAMETERS" +.PP +\fIname\fR +.RS 4 +The name (optionally schema\-qualified) of an existing view\&. +.RE +.PP +\fIcolumn_name\fR +.RS 4 +Name of an existing column\&. +.RE +.PP +\fInew_column_name\fR +.RS 4 +New name for an existing column\&. +.RE +.PP +IF EXISTS +.RS 4 +Do not throw an error if the view does not exist\&. A notice is issued in this case\&. +.RE +.PP +SET/DROP DEFAULT +.RS 4 +These forms set or remove the default value for a column\&. A view column\*(Aqs default value is substituted into any +\fBINSERT\fR +or +\fBUPDATE\fR +command whose target is the view, before applying any rules or triggers for the view\&. The view\*(Aqs default will therefore take precedence over any default values from underlying relations\&. +.RE +.PP +\fInew_owner\fR +.RS 4 +The user name of the new owner of the view\&. +.RE +.PP +\fInew_name\fR +.RS 4 +The new name for the view\&. +.RE +.PP +\fInew_schema\fR +.RS 4 +The new schema for the view\&. +.RE +.PP +SET ( \fIview_option_name\fR [= \fIview_option_value\fR] [, \&.\&.\&. ] ) +.br +RESET ( \fIview_option_name\fR [, \&.\&.\&. ] ) +.RS 4 +Sets or resets a view option\&. Currently supported options are: +.PP +check_option (enum) +.RS 4 +Changes the check option of the view\&. The value must be +local +or +cascaded\&. +.RE +.PP +security_barrier (boolean) +.RS 4 +Changes the security\-barrier property of the view\&. The value must be Boolean value, such as +true +or +false\&. +.RE +.RE +.SH "NOTES" +.PP +For historical reasons, +\fBALTER TABLE\fR +can be used with views too; but the only variants of +\fBALTER TABLE\fR +that are allowed with views are equivalent to the ones shown above\&. +.SH "EXAMPLES" +.PP +To rename the view +foo +to +bar: +.sp +.if n \{\ +.RS 4 +.\} +.nf +ALTER VIEW foo RENAME TO bar; +.fi +.if n \{\ +.RE +.\} +.PP +To attach a default column value to an updatable view: +.sp +.if n \{\ +.RS 4 +.\} +.nf +CREATE TABLE base_table (id int, ts timestamptz); +CREATE VIEW a_view AS SELECT * FROM base_table; +ALTER VIEW a_view ALTER COLUMN ts SET DEFAULT now(); +INSERT INTO base_table(id) VALUES(1); \-\- ts will receive a NULL +INSERT INTO a_view(id) VALUES(2); \-\- ts will receive the current time +.fi +.if n \{\ +.RE +.\} +.SH "COMPATIBILITY" +.PP +\fBALTER VIEW\fR +is a +PostgreSQL +extension of the SQL standard\&. +.SH "SEE ALSO" +CREATE VIEW (\fBCREATE_VIEW\fR(7)), DROP VIEW (\fBDROP_VIEW\fR(7)) |