declare
    column_exists exception;
    pragma exception_init (column_exists , -01430);
begin
    execute immediate 'ALTER TABLE GP_PRICING ADD (INDESTADIAMINIMA NUMBER(1), CANTDIAS_ESTADIAMINIMA NUMBER(3),
					   INDLUN_ESTADIAMINIMA NUMBER(1), INDMAR_ESTADIAMINIMA NUMBER(1), INDMIE_ESTADIAMINIMA NUMBER(1),
					   INDJUE_ESTADIAMINIMA NUMBER(1), INDVIE_ESTADIAMINIMA NUMBER(1), INDSAB_ESTADIAMINIMA NUMBER(1),
					   INDDOM_ESTADIAMINIMA NUMBER(1))';
    exception when column_exists then null;
end;