EXECUTE IMMEDIATE

Description

Executes a sql statement provided as a STRING, optionally passing arg_exprN to parameter markers and assigning the results to var_nameN.

Syntax

EXECUTE IMMEDIATE sql_string
        [ INTO var_name [, …]  ]
        [ USING { (arg_expr [ AS ] [alias] [, …] ) | arg_expr [ AS ] [alias] [, …] } ]

Parameters

• sql_string

  A STRING expression producing a well-formed SQL statement.

• INTO var_name [, …]

  Optionally returns the results of a single row query into SQL variables. If the query returns no rows the result is NULL.

  • var_name A SQL variable. A variable may not be referenced more than once.

• USING arg_expr [, …]

  Optionally, if sql_string contains parameter markers, binds in values to the parameters.

  • arg_expr An expression that binds to a parameter marker. If the parameter markers are unnamed the binding is by position. For unnamed parameter markers, binding is by name.
  • alias Overrides the name used to bind arg_expr to a named parameter marker

  Each named parameter marker must be matched once. Not all arg_expr must be matched.

Examples

-- A self-contained execution using a literal string
EXECUTE IMMEDIATE 'SELECT SUM(c1) FROM VALUES(?), (?)' USING 5, 6;
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-- A SQL string composed in a SQL variable
DECLARE sqlStr = 'SELECT SUM(c1) FROM VALUES(?), (?)';
DECLARE arg1 = 5;
DECLARE arg2 = 6;
EXECUTE IMMEDIATE sqlStr USING arg1, arg2;
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-- Using the INTO clause
DECLARE sum INT;
EXECUTE IMMEDIATE sqlStr INTO sum USING arg1, arg2;
SELECT sum;
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-- Using named parameter markers
SET VAR sqlStr = 'SELECT SUM(c1) FROM VALUES(:first), (:second)';
EXECUTE IMMEDIATE sqlStr INTO (sum)
    USING 5 AS first, arg2 AS second;
SELECT sum;
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