[FEATURE] missing feature on parsing PL/SQL with "DECLARE" cluase

[ZhengguanLi]

Grammar or Syntax Description

DECLARE clause is not supported yet

SQL Example

• Simplified Query Example, focusing on the failing feature

  DECLARE 
      num NUMBER; 
  BEGIN 
      num := 10; 
  
      dbms_output.put_line('The number is ' || num); 
  END; 
  

• Exception

  net.sf.jsqlparser.JSQLParserException: net.sf.jsqlparser.parser.ParseException: Encountered unexpected token: "num" <S_IDENTIFIER>
      at line 2, column 4.
  
  Was expecting one of:
  
      "@"
      "@@"
  

Additional context

The used JSQLParser Version: 4.6
State the applicable RDBMS and version: Oracle 19c
Links to the reference documentation: N/A

[manticore-projects]

Greetings.

Those blocks exceed normal SQL Standard and can become very complex. See the example below.
You will need to provide or sponsor an implementation to get those blocks supported. It will be some serious work.

DECLARE
  l_message  
  VARCHAR2 (100) := 'Hello';
BEGIN
  DECLARE
    l_message2     VARCHAR2 (100) := 
      l_message || ' World!'; 
  BEGIN
    DBMS_OUTPUT.put_line (l_message2);
  END;
EXCEPTION
  WHEN OTHERS
  THEN
    DBMS_OUTPUT.put_line 
   (DBMS_UTILITY.format_error_stack);
END;