Lu, Huayi e6fa411af0 DWS DEV 830.201 version

Reviewed-by: Pruthi, Vineet <vineet.pruthi@t-systems.com>
Co-authored-by: Lu, Huayi <luhuayi@huawei.com>
Co-committed-by: Lu, Huayi <luhuayi@huawei.com>

2024-05-16 07:24:04 +00:00

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Basic Structure

Structure

A PL/SQL block can contain a sub-block which can be placed in any section. The following describes the architecture of a PL/SQL block:

DECLARE: declares variables, types, cursors, and regional stored procedures and functions used in the PL/SQL block.
```
DECLARE
```
This part is optional if no variable needs to be declared.
- An anonymous block may omit the DECLARE keyword if no variable needs to be declared.
- For a stored procedure, AS is used, which is equivalent to DECLARE. The AS keyword must be reserved even if there is no variable declaration part.
EXECUTION: specifies procedure and SQL statements. It is the main part of a program. Mandatory
```
BEGIN
```
EXCEPTION: processes errors. Optional
```
EXCEPTION
```
END
```
END;
/
```
You are not allowed to use consecutive tabs in the PL/SQL block, because they may result in an exception when the parameter -r is executed using the gsql tool.

Type

PL/SQL blocks are classified into the following types:

Anonymous block: a dynamic block that can be executed only for once. For details about the syntax, see Figure 1.
Subprogram: a stored procedure, function, operator, or packages stored in a database. A subprogram created in a database can be called by other programs.

Parent topic: Syntax

4.5 KiB Raw Blame History

Basic Structure

Structure

Type

4.5 KiB

Raw Blame History