Oracle® Database PL/SQL User's Guide and Reference 10g Release 2 (10.2) Part Number B14261-01 |
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The returning clause specifies the values return from DELETE
, EXECUTE
IMMEDIATE
, INSERT
, and UPDATE
statements. You can retrieve the column values into individual variables or into collections. You cannot use the RETURNING
clause for remote or parallel deletes. If the statement does not affect any rows, the values of the variables specified in the RETURNING
clause are undefined.
Syntax
returning clause ::=
Keyword and Parameter Description
Stores result values in one or more collections, for faster queries than loops with FETCH
statements. For more information, see "Reducing Loop Overhead for DML Statements and Queries with Bulk SQL".
collection_name
A declared collection into which select_item
values are fetched. For each select_item
, there must be a corresponding, type-compatible collection in the list.
host_array_name
An array (declared in a PL/SQL host environment and passed to PL/SQL as a bind variable) into which select_item
values are fetched. For each select_item
, there must be a corresponding, type-compatible array in the list. Host arrays must be prefixed with a colon.
host_variable_name
A cursor variable declared in a PL/SQL host environment and passed to PL/SQL as a bind variable. The datatype of the host cursor variable is compatible with the return type of any PL/SQL cursor variable. Host variables must be prefixed with a colon.
INTO ...
Used only for single-row queries, this clause specifies the variables or record into which column values are retrieved. For each value retrieved by the query, there must be a corresponding, type-compatible variable or field in the INTO
clause.
multiple_row_expression
Expression that returns multiple rows of a table.
RETURNING | RETURN
Used only for DML statements that have a RETURNING clause (without a BULK COLLECT clause), this clause specifies the bind variables into which column values are returned. For each value returned by the DML statement, there must be a corresponding, type-compatible variable in the RETURNING INTO clause
single_row_expression
Expression that returns a single row of a table.
variable_name
A variable that stores a selected column value.
Usage
For DML statements that have a RETURNING
clause, you can place OUT
arguments in the RETURNING
INTO
clause without specifying the parameter mode, which, by definition, is OUT
. If you use both the USING
clause and the RETURNING
INTO
clause, the USING
clause can contain only IN
arguments.
At run time, bind arguments replace corresponding placeholders in the dynamic string. Every placeholder must be associated with a bind argument in the USING
clause and/or RETURNING
INTO
clause. You can use numeric, character, and string literals as bind arguments, but you cannot use Boolean literals (TRUE
, FALSE
, and NULL
). To pass nulls to the dynamic string, you must use a workaround. See "Passing Nulls to Dynamic SQL".
Dynamic SQL supports all the SQL datatypes. For example, define variables and bind arguments can be collections, LOB
s, instances of an object type, and refs. Dynamic SQL does not support PL/SQL-specific types. For example, define variables and bind arguments cannot be BOOLEAN
s or index-by tables. The only exception is that a PL/SQL record can appear in the INTO
clause.
For examples, see the following:
Related Topics