I try to do the following :

CREATE OR REPLACE PACKAGE my_package AS
  -- Declare the global variable
  my_variable VARCHAR(255);
END my_package;
/

CREATE OR REPLACE PACKAGE BODY my_package AS
  -- Assign a value to the global variable
  my_variable := 'test';
END my_package;
/

But this does highlight := and throw the following error :

LINE/COL  ERROR
--------- -------------------------------------------------------------
3/15      PLS-00103: Encountered the symbol "=" when expecting one of the following:     constant exception <an identifier>    <a double-quoted delimited-identifier> table columns long    double ref char time timestamp interval date binary national    character nchar The symbol "<an identifier>" was substituted for "=" to continue. 
Errors: check compiler log

How can I create a package with in it a global variable so I can use it as follow :

my_package.my_variable

CodePudding user response：

You are missing a BEGIN block:

CREATE OR REPLACE PACKAGE BODY my_package AS
BEGIN
  -- Assign a value to the global variable
  my_variable := 10;
END my_package;
/

CodePudding user response：

If you want to use it in SQL then create a function to wrap the variable:

CREATE OR REPLACE PACKAGE my_package AS
  FUNCTION get_my_variable
  RETURN VARCHAR2;
END my_package;
/

CREATE OR REPLACE PACKAGE BODY my_package AS
  -- Declare the package variable
  -- It can be public, if declared in the package specification
  -- Or private, if declared in the package body
  my_variable VARCHAR(255);

  FUNCTION get_my_variable
  RETURN VARCHAR2
  IS
  BEGIN
    RETURN my_variable;
  END;
BEGIN
  -- Assign a value to the global variable
  my_variable := 'test';
END my_package;
/

Then you can use it in SQL:

SELECT my_package.get_my_variable() FROM DUAL;

Outputs:

fiddle