[firebase-br] Execute Block

[Gladiston Santana]

Testei aqui e funcionou.
Agora coloquei de forma didática com duas semânticas diferentes para a
mesma coisa afim de que pudesse compreender.
Ex:

SET TERM ^ ;
EXECUTE BLOCK
AS
declare variable lsql varchar(4096)='';
BEGIN
  lsql='CREATE TABLE teste(c1 varchar(255), n1 integer);';
  execute statement :lsql with autonomous transaction;
  IN AUTONOMOUS TRANSACTION DO
  BEGIN
    execute statement 'insert into teste(c1, n1) values(''a'',1);';
    execute statement 'insert into teste(c1, n1) values(''b'',2);';
    execute statement 'insert into teste(c1, n1) values(''c'',3);';
  END
END ^
SET TERM ; ^

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