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ALTER AGGREGATE(7) PostgreSQL 12.3 Documentation ALTER AGGREGATE(7)
NAME
ALTER_AGGREGATE - change the definition of an aggregate function
SYNOPSIS
ALTER AGGREGATE name ( aggregate_signature ) RENAME TO new_name
ALTER AGGREGATE name ( aggregate_signature )
OWNER TO { new_owner | CURRENT_USER | SESSION_USER }
ALTER AGGREGATE name ( aggregate_signature ) SET SCHEMA new_schema
where aggregate_signature is:
* |
[ argmode ] [ argname ] argtype [ , ... ] |
[ [ argmode ] [ argname ] argtype [ , ... ] ] ORDER BY [ argmode ] [ argname ] argtype [ , ... ]
DESCRIPTION
ALTER AGGREGATE changes the definition of an aggregate function.
You must own the aggregate function to use ALTER AGGREGATE. To change the schema of an
aggregate function, 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 aggregate function's schema. (These restrictions enforce
that altering the owner doesn't do anything you couldn't do by dropping and recreating the
aggregate function. However, a superuser can alter ownership of any aggregate function
anyway.)
PARAMETERS
name
The name (optionally schema-qualified) of an existing aggregate function.
argmode
The mode of an argument: IN or VARIADIC. If omitted, the default is IN.
argname
The name of an argument. Note that ALTER AGGREGATE does not actually pay any attention
to argument names, since only the argument data types are needed to determine the
aggregate function's identity.
argtype
An input data type on which the aggregate function operates. To reference a
zero-argument aggregate function, write * in place of the list of argument
specifications. To reference an ordered-set aggregate function, write ORDER BY between
the direct and aggregated argument specifications.
new_name
The new name of the aggregate function.
new_owner
The new owner of the aggregate function.
new_schema
The new schema for the aggregate function.
NOTES
The recommended syntax for referencing an ordered-set aggregate is to write ORDER BY
between the direct and aggregated argument specifications, in the same style as in CREATE
AGGREGATE (CREATE_AGGREGATE(7)). However, it will also work to omit ORDER BY and just run
the direct and aggregated argument specifications into a single list. In this abbreviated
form, if VARIADIC "any" was used in both the direct and aggregated argument lists, write
VARIADIC "any" only once.
EXAMPLES
To rename the aggregate function myavg for type integer to my_average:
ALTER AGGREGATE myavg(integer) RENAME TO my_average;
To change the owner of the aggregate function myavg for type integer to joe:
ALTER AGGREGATE myavg(integer) OWNER TO joe;
To move the ordered-set aggregate mypercentile with direct argument of type float8 and
aggregated argument of type integer into schema myschema:
ALTER AGGREGATE mypercentile(float8 ORDER BY integer) SET SCHEMA myschema;
This will work too:
ALTER AGGREGATE mypercentile(float8, integer) SET SCHEMA myschema;
COMPATIBILITY
There is no ALTER AGGREGATE statement in the SQL standard.
SEE ALSO
CREATE AGGREGATE (CREATE_AGGREGATE(7)), DROP AGGREGATE (DROP_AGGREGATE(7))
PostgreSQL 12.3 2020 ALTER AGGREGATE(7)
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