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diff --git a/doc/src/sgml/man7/REFRESH_MATERIALIZED_VIEW.7 b/doc/src/sgml/man7/REFRESH_MATERIALIZED_VIEW.7 new file mode 100644 index 0000000..c0616c0 --- /dev/null +++ b/doc/src/sgml/man7/REFRESH_MATERIALIZED_VIEW.7 @@ -0,0 +1,117 @@ +'\" t +.\" Title: REFRESH MATERIALIZED VIEW +.\" Author: The PostgreSQL Global Development Group +.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/> +.\" Date: 2023 +.\" Manual: PostgreSQL 15.4 Documentation +.\" Source: PostgreSQL 15.4 +.\" Language: English +.\" +.TH "REFRESH MATERIALIZED VIEW" "7" "2023" "PostgreSQL 15.4" "PostgreSQL 15.4 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" +REFRESH_MATERIALIZED_VIEW \- replace the contents of a materialized view +.SH "SYNOPSIS" +.sp +.nf +REFRESH MATERIALIZED VIEW [ CONCURRENTLY ] \fIname\fR + [ WITH [ NO ] DATA ] +.fi +.SH "DESCRIPTION" +.PP +\fBREFRESH MATERIALIZED VIEW\fR +completely replaces the contents of a materialized view\&. To execute this command you must be the owner of the materialized view\&. The old contents are discarded\&. If +WITH DATA +is specified (or defaults) the backing query is executed to provide the new data, and the materialized view is left in a scannable state\&. If +WITH NO DATA +is specified no new data is generated and the materialized view is left in an unscannable state\&. +.PP +CONCURRENTLY +and +WITH NO DATA +may not be specified together\&. +.SH "PARAMETERS" +.PP +CONCURRENTLY +.RS 4 +Refresh the materialized view without locking out concurrent selects on the materialized view\&. Without this option a refresh which affects a lot of rows will tend to use fewer resources and complete more quickly, but could block other connections which are trying to read from the materialized view\&. This option may be faster in cases where a small number of rows are affected\&. +.sp +This option is only allowed if there is at least one +UNIQUE +index on the materialized view which uses only column names and includes all rows; that is, it must not be an expression index or include a +WHERE +clause\&. +.sp +This option may not be used when the materialized view is not already populated\&. +.sp +Even with this option only one +REFRESH +at a time may run against any one materialized view\&. +.RE +.PP +\fIname\fR +.RS 4 +The name (optionally schema\-qualified) of the materialized view to refresh\&. +.RE +.SH "NOTES" +.PP +If there is an +ORDER BY +clause in the materialized view\*(Aqs defining query, the original contents of the materialized view will be ordered that way; but +\fBREFRESH MATERIALIZED VIEW\fR +does not guarantee to preserve that ordering\&. +.SH "EXAMPLES" +.PP +This command will replace the contents of the materialized view called +order_summary +using the query from the materialized view\*(Aqs definition, and leave it in a scannable state: +.sp +.if n \{\ +.RS 4 +.\} +.nf +REFRESH MATERIALIZED VIEW order_summary; +.fi +.if n \{\ +.RE +.\} +.PP +This command will free storage associated with the materialized view +annual_statistics_basis +and leave it in an unscannable state: +.sp +.if n \{\ +.RS 4 +.\} +.nf +REFRESH MATERIALIZED VIEW annual_statistics_basis WITH NO DATA; +.fi +.if n \{\ +.RE +.\} +.SH "COMPATIBILITY" +.PP +\fBREFRESH MATERIALIZED VIEW\fR +is a +PostgreSQL +extension\&. +.SH "SEE ALSO" +CREATE MATERIALIZED VIEW (\fBCREATE_MATERIALIZED_VIEW\fR(7)), ALTER MATERIALIZED VIEW (\fBALTER_MATERIALIZED_VIEW\fR(7)), DROP MATERIALIZED VIEW (\fBDROP_MATERIALIZED_VIEW\fR(7)) |