Question

I am trying to make a form in oracle application builder with a column called START_TIME and END_TIME.

Now when I try to view the form I can only see it as DATES and cannot enter any HOURS or MINUTES.

My table was constructed as follows:

CREATE TABLE  "MACHINE_SCHEDULE" 
   (    "SCHEDULE_NUMBER" VARCHAR2(100 CHAR), 
    "MACHINE_NO" VARCHAR2(10 CHAR), 
    "MACHINE_USE_DATE" DATE, 
    "START_TIME" DATE, 
    "END_TIME" DATE, 
    "PROCESS" VARCHAR2(164 CHAR), 
    "BATCH_NO" VARCHAR2(10 CHAR), 
    "MATERIAL_BAR_NO" NUMBER(8,0), 
    "TECHNICIAN_STAFF_NO" VARCHAR2(15 CHAR), 
     CONSTRAINT "MACHINE_SCHEDULE_PK" PRIMARY KEY ("SCHEDULE_NUMBER") ENABLE
   )
/
ALTER TABLE  "MACHINE_SCHEDULE" ADD CONSTRAINT "MACHINE_SCHEDULE_CON" FOREIGN KEY ("TECHNICIAN_STAFF_NO")
      REFERENCES  "MODULE_TECHNICIAN" ("TECHNICIAN_STAFF_NO") ENABLE
/
ALTER TABLE  "MACHINE_SCHEDULE" ADD CONSTRAINT "MACHINE_SCHEDULE_FK" FOREIGN KEY ("BATCH_NO")
      REFERENCES  "BATCH" ("BATCH_NO") ENABLE
/
ALTER TABLE  "MACHINE_SCHEDULE" ADD CONSTRAINT "MACHINE_SCHEDULE_FK2" FOREIGN KEY ("MATERIAL_BAR_NO")
      REFERENCES  "MATERIAL_BAR" ("MATERIAL_BAR_NO") ENABLE
/

CREATE OR REPLACE TRIGGER  "BI_MACHINE_SCHEDULE" 
  before insert on "MACHINE_SCHEDULE"               
  for each row  
begin   
  if :NEW."SCHEDULE_INSTANT_NUMBER" is null then 
    select "MACHINE_SCHEDULE_SEQ".nextval into :NEW."SCHEDULE_INSTANT_NUMBER" from dual; 
  end if; 
end; 

/
ALTER TRIGGER  "BI_MACHINE_SCHEDULE" DISABLE
/

I cannot modify the DATE

My form uses the folowing sources:

select 
"SCHEDULE_NUMBER",
"SCHEDULE_NUMBER" SCHEDULE_NUMBER_DISPLAY,
"MACHINE_NO",
"MACHINE_USE_DATE",
"START_TIME" as b,
TO_CHAR(b, 'HH24:MI:SS'),
"END_TIME",
"PROCESS",
"BATCH_NO",
"MATERIAL_BAR_NO",
"TECHNICIAN_STAFF_NO"
from "#OWNER#"."MACHINE_SCHEDULE"

However it gives the erorr:

“Query cannot be parsed within the Builder. If you believe your query
is syntactically correct, check the ”generic columns” checkbox below
the region source to proceed without parsing. ORA-00904: “B”: invalid
identifier”

If I change the ‘b’ variable to START_TIME it gives the error:

query column #5 (TO_CHAR(“START_TIME”,’HH24:MI:SS’)) is invalid, use
column alias

Answer 1

In addition:

-- This will never work --
SELECT SYSDATE as b, to_char(b, 'HH24:MI:SS') tme
 FROM dual
/

Output: ORA-00904: "B": invalid identifier


-- This will work --
SELECT to_char(b, 'HH24:MI:SS') tme
  FROM
 (
  SELECT SYSDATE as b
    FROM dual
 )
/

Output: 10:09:02