EXECUTE IMMEDIATE Statement

The EXECUTE IMMEDIATE statement builds and runs a dynamic SQL statement in a single operation. Native dynamic SQL uses the EXECUTE IMMEDIATE statement to process most dynamic SQL statements.

LNPLS1198Topics

• Syntax

• Semantics

• Examples

• Related Topics

Syntax

LNPLS1068execute_immediate_statement ::=

See:

• "bulk_collect_into_clause ::="

• "dynamic_returning_clause ::="

• "into_clause ::="

LNPLS1071using_clause ::=

Semantics

LNPLS1199execute_immediate_statement

LNPLS1201dynamic_sql_stmt

String literal, string variable, or string expression that represents a SQL statement. Its type must be either CHAR, VARCHAR2, or CLOB.

EXECUTE IMMEDIATE 'SELECT S.NEXTVAL FROM DUAL'

LNPLS1205into_clause

Specifies the variables or record in which to store the column values that the statement returns. For more information about this clause, see "RETURNING INTO Clause".

LNPLS1206Restriction on into_clause Use if and only if dynamic_sql_stmt returns a single row.

LNPLS1215bulk_collect_into_clause

Specifies one or more collections in which to store the rows that the statement returns. For more information about this clause, see "RETURNING INTO Clause".

LNPLS1223Restriction on bulk_collect_into_clause Use if and only if dynamic_sql_stmt can return multiple rows.

LNPLS1224using_clause

Specifies bind variables.

LNPLS1225Restrictions on using_clause 

• Use if and only if dynamic_sql_stmt includes placeholders for bind variables.

• If dynamic_sql_stmt has a RETURNING INTO clause, using_clause can contain only IN bind variables. The bind variables in the RETURNING INTO clause are OUT bind variables by definition.

LNPLS1226dynamic_returning_clause

Returns the column values of the rows affected by the dynamic SQL statement, in either individual variables or records. For more information about this clause, see "RETURNING INTO Clause".

LNPLS1227Restriction on dynamic_returning_clause Use if and only if dynamic_sql_stmt has a RETURNING INTO clause.

LNPLS1228using_clause

LNPLS1229IN, OUT, IN OUT

Parameter modes of bind variables. An IN bind variable passes its value to dynamic_sql_stmt. An OUT bind variable stores a value that dynamic_sql_stmt returns. An IN OUT bind variable passes its initial value to dynamic_sql_stmt and stores a value that dynamic_sql_stmt returns. Default: IN.

For DML a statement with a RETURNING clause, you can place OUT bind variables in the RETURNING INTO clause without specifying the parameter mode, which is always OUT.

LNPLS1230bind_argument

An expression whose value replaces its corresponding placeholder in dynamic_sql_stmt at run time.

Every placeholder in dynamic_sql_stmt must be associated with a bind_argument in the USING clause or RETURNING INTO clause (or both) or with a define variable in the INTO clause.

You can run dynamic_sql_stmt repeatedly using different values for the bind variables. You incur some overhead, because EXECUTE IMMEDIATE prepares the dynamic string before every execution.

LNPLS1231Restriction on bind_argument The value of bind_argument cannot be TRUE, FALSE, or NULL. To pass the value NULL to the dynamic SQL statement, use an uninitialized variable where you want to use NULL, as in "Uninitialized Variable Represents NULL in USING Clause".

Examples

• Example 7-1, "Invoking Subprogram from Dynamic PL/SQL Block"

• Example 7-2, "Unsupported Data Type in Native Dynamic SQL"

• Example 7-3, "Uninitialized Variable Represents NULL in USING Clause"

• Example 7-5, "Repeated Placeholder Names in Dynamic PL/SQL Block"

Related Topics

LNPLS1233In this chapter:

• "RETURNING INTO Clause"

LNPLS1234In other chapters:

• "EXECUTE IMMEDIATE Statement"

• "DBMS_SQL Package"