declare 
  column_exists exception;
  pragma exception_init (column_exists , -01430);
begin 
  execute immediate 'ALTER TABLE LOG_CONFERENCIA ADD INDMESMODIA NUMBER(1,0)';
  exception when column_exists then null;
end;
/
declare
  ja_existe  exception;
  pragma exception_init (ja_existe  , -00001);
begin
  execute immediate 'INSERT INTO CONFERENCIA_PENDENCIA VALUES (CONFERENCIA_PENDENCIA_SEQ.NEXTVAL,''ENTRADA DE CORRECAO'', 1, current_date, 1)';
  exception when ja_existe  then null;
end;
/
declare
  ja_existe  exception;
  pragma exception_init (ja_existe  , -00001);
begin
  execute immediate 'INSERT INTO CONFERENCIA_PENDENCIA VALUES (CONFERENCIA_PENDENCIA_SEQ.NEXTVAL,''SAIDA DE CORRECAO'', 1, current_date, 1)';
  exception when ja_existe  then null;
end;