Quick Answer: Why we use Pragma Exception_init in Oracle with example?

The pragma EXCEPTION_INIT associates an exception name with an Oracle error number. You can intercept any ORA- error and write a specific handler for it instead of using the OTHERS handler. You can use EXCEPTION_INIT in the declarative part of any PL/SQL block, subprogram, or package.

What is pragma in Oracle with example?

The PRAGMA keyword is used to signify that the remainder of the PL/SQL statement is a pragma, or directive, to the compiler. Tells the PL/SQL runtime engine to commit or roll back any changes made to the database inside the current block without affecting the main or outer transaction.

What is the difference between pragma EXCEPTION_INIT and Raise_application_error?

much cleaner (i hate when others — should be outlawed). Raise_application_error is used to RAISE an error – exception_init is used to deal with errors (i guess you could say they are opposites in a way).

Why we are using pragma?

#pragma is for compiler directives that are machine-specific or operating-system-specific, i.e. it tells the compiler to do something, set some option, take some action, override some default, etc. that may or may not apply to all machines and operating systems.

What is pragma exception underscore in it used for?

PRAGMA Exception_Init Exception_init helps you in associating an exception name with an Oracle error number. In other words we can say that using Exception_Init you can name the exception.

What is the use of pragma EXCEPTION_INIT is to?

The pragma EXCEPTION_INIT associates an exception name with an Oracle error number. You can intercept any ORA- error and write a specific handler for it instead of using the OTHERS handler.

What is the first parameter of the pragma EXCEPTION_INIT function?

The pragma exception_init is declared with its first parameter as the local variable deadlock_error and the second variable as the dead lock’s error code -60. Start of the execution section of the block.

When we use Pragma autonomous transaction?

The AUTONOMOUS_TRANSACTION pragma changes the way a subprogram works within a transaction. A subprogram marked with this pragma can do SQL operations and commit or roll back those operations, without committing or rolling back the data in the main transaction.

What is Sqlcode and Sqlerrm in Oracle?

SQLCODE and SQLERRM are Oracle’s built-in error reporting functions in PL/SQL. When an error occurs in PL/SQL at runtime: SQLCODE returns the number of the last encountered error. SQLERRM returns the message associated with its error-number argument.

Can we use Pragma Autonomous_transaction transaction in packages?

You cannot apply this pragma to an entire package or an entire an object type. Instead, you can apply the pragma to each packaged subprogram or object method. For readability, code the pragma at the top of the section. Once started, an autonomous transaction is fully independent.

Where is pragma used?

The preprocessor directive #pragma is used to provide the additional information to the compiler in C/C++ language. This is used by the compiler to provide some special features.

What is Oracle pragma?

A pragma is a compiler directive that is processed at compile time, not at run time. About: In PL/SQL, the pragma EXCEPTION_INIT tells the compiler to associate an exception name with an Oracle Database error number. That lets you refer to any internal exception by name and to write a specific handler for it.

Should I use pragma once or Ifndef?

The fact of the matter is, #ifndef is standardized with standard behavior whereas #pragma once is not, and #ifndef also handles weird filesystem and search path corner cases whereas #pragma once can get very confused by certain things, leading to incorrect behavior which the programmer has no control over.

What is Pragma Serially_reusable and why is it used?

The pragma SERIALLY_REUSABLE indicates that the package state is needed only for the duration of one call to the server (for example, a PL/SQL anonymous block, an OCI call to the database or a stored procedure call through a database link).

What is pragma inline in Oracle?

The INLINE pragma specifies whether a subprogram invocation is to be inlined. This is done by replacing the subprogram calls with a copy of the code in the subprogram at compile time. The process of subprogram inlining is controlled by the PLSQL_OPTIMIZE_LEVEL parameter and the INLINE pragma.

What is Pragma Restrict_references in Oracle?

The RESTRICT_REFERENCES pragma asserts that a user-defined subprogram does not read or write database tables or package variables. The RESTRICT_REFERENCES pragma is deprecated. Oracle recommends using DETERMINISTIC and PARALLEL_ENABLE instead of RESTRICT_REFERENCES.

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