I have a domain class that when persisted to Oracle must update a column to sysdate. NHibernate must only generate 1 SQL. e.g.
update person set age = 12, stamp = sysdate where id = 1;
Can this be done?
EDITED:
Could be something like:
Person person = (Person)session.Get(typeof(Person), 1);
session.SetFunction(person, "stamp", Functions.CurrentTimestamp);
person.Age = 12;
session.Flush();
You could update the stamp via a database trigger:
create trigger person_trg
before update
for each row
begin
:new.stamp := sysdate;
end;
Then all hibernate would need to do is "persist" the change to age (for example).
If you want to do that on demand, you can just execute the query above:
session.CreateQuery("update person set age = 12, stamp = sysdate where id = 1")
.ExecuteUpdate();
Interestingly, that is both valid HQL and SQL.
Related
create or replace TRIGGER "DB"."TRIG_PERIOD_TRUANCY_INS_UPD"
AFTER UPDATE OR INSERT
ON AT_PERIOD_ATTENDANCE_RECORDS
REFERENCING OLD AS OLD NEW AS NEW
FOR EACH ROW
BEGIN
IF UPDATING THEN
delete at_period_truancy where period_attendance_records_id = :old.period_attendance_records_id;
END IF;
insert into at_period_truancy (period_attendance_records_id, district_number, school_id, student_id, calendar_date, school_year, minutes)
select :new.period_attendance_records_id, :new.district_number, :new.school_id, :new.student_id, :new.calendar_date, :new.school_year,
(case when :new.attendance_status = 'A' then period.end_time - period.begin_time
when coalesce(:new.tardy_time_in_time, period.begin_time) - period.begin_time >
period.end_time - coalesce(:new.tardy_time_out_time, period.end_time)
then coalesce(:new.tardy_time_in_time, period.begin_time) - period.begin_time
else period.end_time - coalesce(:new.tardy_time_out_time, period.end_time) end)*24*60
from ca_calendar cal
inner join ca_school_calendar calendar
on (cal.district_number = calendar.district_number
and cal.calendar_id = calendar.calendar_id )
inner join sc_class_meeting_pattern meeting
on (calendar.cycle_day_cd = meeting.cycle_day_cd)
inner join sc_class class
on (class.school_scheduling_param_id = meeting.school_scheduling_param_id
and class.class_id = meeting.class_id)
inner join sc_period_info period
on (meeting.school_scheduling_param_id = period.school_scheduling_param_id
and meeting.period = period.period)
where :new.district_number = cal.district_number
and cal.is_active_ind = 1
and :new.school_id = cal.school_id
and :new.school_year = cal.school_year
and :new.calendar_type_cd = cal.calendar_type_cd
and :new.track_number = cal.track_number
and :new.calendar_date = calendar.calendar_date
and :new.school_id = class.school_id
and :new.class_id = class.class_id
and 1 in (select use_in_truancy_report_ind
from enum_at_absence_reason_code
where district_number = :new.district_number
and school_id = :new.school_id
and value = :new.absence_reason_code
union all
select use_in_truancy_report_ind
from enum_at_tardy_reason_code
where district_number = :new.district_number
and school_id = :new.school_id
and value = :new.tardy_reason_code);
END TRIG_PERIOD_TRUANCY_INS_UPD;
This is the trigger that I am using. When calling the update statement this trigger is getting invoked and when I pass tardy_reason_code as UN this error is happening. It executes without any issues if I pass tardy_reason_code with different values.
Trigger is inserting into at_period_truancy tables.
As Oracle raises ORA-00001 (unique constraint violated), it means that you're trying to insert primary key value which already exists in the table.
You didn't post create table statement so it is difficult to guess which columns make the primary key, but - you should know it so check which values you already have in there, compare that to values currently being inserted and you'll know what to do.
Maybe you'll have to modify primary key (add other columns? Abandon idea of current primary key and using a sequence (or identity column)) or the way you're inserting values into the table.
In mongoDB i remember there is a findOneAndUpdate query. Do we have or atleast can we create a query in oracle sql that only updates record if it exists otherwise will return a no data found message? I tried this query below however it updates all the record when a result is found:
UPDATE
user
SET
fname=:lname,
lname=:fname
WHERE
EXISTS (
SELECT * FROM user WHERE id=:id
)
Wouldn't it be just
update t_user set
fname = :lname,
lname = :fname
where id = :id;
It won't return an error if nothing's being updated, though, so - if it is actually a PL/SQL procedure, you'll have to check it yourself, e.g. (right behind the above UPDATE statement):
if sql%rowcount = 0 then
dbms_output.put_line('No rows have been updated');
end if;
I tried looking for a similar example to my problem but could not reproduce the solution to my success.
I have 2 tables, Controller and Actions.
The Actions table has the columns Step, Script, Description, Wait_Until and Ref_Code.
The Controller table can only be joined on the Action table by the Ref_Code.
The Action table cannot have a PK because for each Ref_Code there is a Step to be taken.
Im getting an error when trying to update the Controller table using a merge statement:
ORA-30926: unable to get a stable set of rows in the source tables
My merge statement is as follows:
MERGE INTO DSTETL.SHB_FTPS_CONTROLLER ftpsc
USING (SELECT DISTINCT FTPSC.SESSION_ID,
FTPSC.ORDER_DATE,
sa.step,
sa.next_step,
LAST_ACTION_TMSTMP,
SA.ACTION_SCRIPT,
sa.ref_code,
SA.WAIT_UNTIL
FROM DSTETL.SHB_FTPS_CONTROLLER ftpsc, DSTETL.SHB_ACTIONS sa
WHERE SA.REF_CODE = FTPSC.REF_CODE
AND SA.STEP > ftpsc.curr_step
AND sa.step = ftpsc.next_step) v1
ON (v1.REF_CODE = FTPSC.REF_CODE)
WHEN MATCHED
THEN
UPDATE SET FTPSC.LAST_ACTION_TMSTMP = CURRENT_TIMESTAMP,
ftpsc.next_step = v1.next_step,
ftpsc.curr_step = v1.STEP,
ftpsc.action_script = v1.action_script
WHERE CURRENT_TIMESTAMP >= v1.LAST_ACTION_TMSTMP + v1.WAIT_UNTIL;
COMMIT;
I tried doing this using a normal update as well but Im getting ORA-01732: data manipulation operation not legal on this view.
UPDATE (SELECT FTPSC.SESSION_ID,
FTPSC.ORDER_DATE,
FTPSC.CURR_STEP,
FTPSC.NEXT_STEP,
FTPSC.ACTION_SCRIPT,
sa.step, --New Step
sa.next_step AS "NNS", --New Next Step
FTPSC.LAST_ACTION_TMSTMP,
SA.ACTION_SCRIPT AS "NAS", --New action script
sa.ref_code,
SA.WAIT_UNTIL
FROM DSTETL.SHB_FTPS_CONTROLLER ftpsc
LEFT JOIN
DSTETL.SHB_ACTIONS sa
ON SA.REF_CODE = FTPSC.REF_CODE
AND SA.STEP > ftpsc.curr_step
AND sa.step = ftpsc.next_step) t
SET t.curr_step = t.step,
t.LAST_ACTION_TMSTMP = CURRENT_TIMESTAMP,
t.next_step = t."NNS",
t.action_script = t."NAS";
COMMIT;
Any advice would be appreciated, I already understand this is because the Action table has multiple Ref_Codes but REF_CODE||STEP is unique. And the output of:
SELECT DISTINCT FTPSC.SESSION_ID,
FTPSC.ORDER_DATE,
sa.step,
sa.next_step,
LAST_ACTION_TMSTMP,
SA.ACTION_SCRIPT,
sa.ref_code,
SA.WAIT_UNTIL
FROM DSTETL.SHB_FTPS_CONTROLLER ftpsc, DSTETL.SHB_ACTIONS sa
WHERE SA.REF_CODE = FTPSC.REF_CODE
AND SA.STEP > ftpsc.curr_step
AND sa.step = ftpsc.next_step;
Is how I want the Controller table to be updated like.
Thanks in advance.
It sounds like what you want to do is: update each row in the Controller table with the matching "next step" details from the Actions table. But your Merge statement is querying the Controller table twice, which confuses things.
Is this what you're trying to do?
MERGE INTO DSTETL.SHB_FTPS_CONTROLLER ftpsc
USING (SELECT
step,
next_step,
ACTION_SCRIPT,
ref_code,
WAIT_UNTIL
FROM DSTETL.SHB_ACTIONS
) sa
ON (sa.REF_CODE = FTPSC.REF_CODE)
WHEN MATCHED
THEN
UPDATE SET FTPSC.LAST_ACTION_TMSTMP = CURRENT_TIMESTAMP,
ftpsc.next_step = sa.next_step,
ftpsc.curr_step = sa.STEP,
ftpsc.action_script = sa.action_script
WHERE CURRENT_TIMESTAMP >= ftpsc.LAST_ACTION_TMSTMP + sa.WAIT_UNTIL
AND SA.STEP > ftpsc.curr_step
AND sa.step = ftpsc.next_step;
EDIT: updated query
EDIT2: So, in your original query, in the USING section you were selecting the rows in the Controller table that you wanted to update... but you never joined those rows to the Controller table from the MERGE INTO section to match them up. Having the same alias "ftpsc" just made it less clear that they're two separate objects in the query, and which one you wanted to update.
Honestly I don't really understand why Oracle won't let you update columns that appear in the USING..ON clause. It apparently works fine in SQL Server.
i am using spring jdbc template and i want to update some of the columns in a table.
Ex:Consider Student table
id-->1007.
name-->Krish.
age-->25.
tel-->0112538956536.
this is a existing record.i want to update some fields only(updating fields change time to time).others should have their existing values.how can i acheive this in Spring JDBC template.Any suggestions will be very much helpful.
Thanks.
you can use jdbc template for update table from application
here is the simple example
String name = "asdads";
int age = 12;
String tel = "+905655465465";
int id = 1;
String SQL = "update Student set name = ?, age= ? ,tel=?, last_updated = sysdate() where id = ?";
jdbcTemplate.update(SQL,name, age, tel, id);
may be just like
jdbcTemplate.update(
"update Student set last_updated=now(),some_field=?",
"some value");
How can I update all the tables which have Datetime fields in a database?
Eg. My DB has 50 Tables which has a column in the 50 tables which is of DATETIME Type.
I need to update the Column of datetime type with a new value.
How can I write a generic query to update datetime column in all the tables in the DB with a new value of datetime?
While I question the value of this in an unprecedented way (you should be proud!), you can't write a generic query that does this without dynamic SQL.
DECLARE
#sql NVARCHAR(MAX) = N'',
#newDateTime DATETIME = '20131217 07:30';
SELECT #sql += N'
UPDATE ' + QUOTENAME(s.name) + '.' + QUOTENAME(t.name)
+ ' SET ' + QUOTENAME(c.name) + ' = #newDateTime;'
FROM sys.columns AS c
INNER JOIN sys.tables AS t ON c.[object_id] = t.[object_id]
INNER JOIN sys.schemas AS s ON t.[schema_id] = s.[schema_id]
WHERE c.system_type_id = 61;
EXEC sp_executesql #sql, N'#newDateTime DATETIME', #newDateTime;