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How to use SQL UNION with three separate Ignite Caches

I was having a ignite cache and doing sql queries as follows.
IgniteCache<String, ClassName> cache = ignite.cache(CACHE_NAME);
private static final String sql = "Select timestamp from cache1 where orderId = ? and timestamp <= ? and timestamp >= ? ";
SqlFieldsQuery sqlQ = new SqlFieldsQuery(sql).setArgs(id, t1, t2);
try (QueryCursor<List<?>> cursor = cache.query(sqlQ)) {
for (List<?> row : cursor) {
timestamps.add((Long) row.get(0));
}
Now I want to query from three different caches and get the union. I was able to successfully execute the SQL command in a SQL engine as follows and get results.
Select starttime from "unconfirmed_event_mc_79".unconfirmedevent union all Select starttime from "unconfirmed_event_urgent_mc_79".unconfirmedevent union all Select starttime from "confirmed_event_mc_79".confirmedevent order by starttime desc limit 1;
I want to add the timestamp results from three separate caches to a single arraylist.
I tried following method and it was not successful.
EVENT_GET_RHYTHM_BY_ID = "Select timestamp from ConfirmedEvent where orderId = ? and startTime < ? and endTime > ? and type = %s UNION ALL " +
"Select timestamp from " + String.format(UNCONFIRMED_NON_URGENT_EVENT_CACHE,mcId) + ".UnconfirmedEvent where orderId = ? and startTime < ? and endTime > ? and type = %s " +
"Select timestamp from " + String.format(UNCONFIRMED_URGENT_EVENT_CACHE,mcId) + ".UnconfirmedEvent where orderId = ? and startTime < ? and endTime > ? and type = %s " + " order by startTime";
sql_Afib = new SqlFieldsQuery(String.format(EVENT_GET_RHYTHM_BY_ID, AnnotationConverter.StringToRhythmValue(AFIB), AnnotationConverter.StringToRhythmValue(AFIB),
AnnotationConverter.StringToRhythmValue(AFIB))).setArgs(orderId, endTimestamp, startTimestamp,
orderId, endTimestamp, startTimestamp, orderId, endTimestamp, startTimestamp);
try (QueryCursor<List<?>> cursor = confirmedEventCache.query(sql_Afib)) {
for (List<?> row : cursor) {
EventsEndTime.add(row.get(0));
}
}
I want to know how to use the query cursor? Now there are three caches and how to do the this part? (QueryCursor<List<?>> cursor = cache.query(sqlThreeCaches)) and how to write the SQL field in a java code?
Or is there any other way to do this?
Here is how I define the caches in a java code. There are three different caches, but column names in the cache tables are same.
public static final String EVENT_VIEW_RESERVED_EVENT_CACHE = "event_view_reserved_event_mc_%d";
public static final String UNCONFIRMED_NON_URGENT_EVENT_CACHE = "unconfirmed_event_mc_%d";
public static final String UNCONFIRMED_URGENT_EVENT_CACHE = "unconfirmed_event_urgent_mc_%d";
IgniteCache<String, ConfirmedEvent> confirmedEventCache = ignite.cache(String.format(CONFIRMED_EVENT_CACHE, mcId));
IgniteCache<String, UnconfirmedEvent> unconfirmedEventCache = ignite.cache(String.format(UNCONFIRMED_NON_URGENT_EVENT_CACHE,mcId));
IgniteCache<String, UnconfirmedEvent> unconfirmedUrgentEventCache = ignite.cache(String.format(UNCONFIRMED_URGENT_EVENT_CACHE,mcId));

Oracle - How to use START WITH in loop (hibernate select)

I am using hibernate for this select:
NativeQuery sqlQuery = session.createSQLQuery("select :id, min(a.time) " +
"from table1 a, (" +
" select parentid" +
" from (" +
" select LEVEL, parentid" +
" from table2 " +
" START WITH id = :id" +
" CONNECT BY NOCYCLE PRIOR parentid = id" +
" order by level desc)" +
" where rownum = 1" +
" ) b " +
"where a.id = b.parentid");
sqlQuery.setParameter("id", id);
List<Object[]> list = sqlQuery.list();
I need to use this for a lot of ids. Ideally I would pass a list of ids, run that in oracle and return the result. I cannot do that because of the START WITH clause.
This way I send a query to database for each id, which is really slow.
Is there any way to put a list of ids to the query, do this in loop and return back to the application with a list of results?
NativeQuery sqlQuery = session.createSQLQuery("...?...");
sqlQuery.setListParameter("ids", ids);
List<Object[]> list = sqlQuery.list();
Edit: I cannot use recursive with, because we use Oracle 10.

I don't know about the Oracle specific syntax, but with the SQL standard WITH RECURSIVE syntax, you can of course list multiple parameters. Just use the IN predicate e.g. for batches of 5 id IN (:id1, :id2, :id3, :id4, :id5) and then bind the values with setParameter("id1", ...). If you are interested, you can also formulate this with Blaze-Persistence on top of Hibernate by using the JPA model: https://persistence.blazebit.com/documentation/1.6/core/manual/en_US/#recursive-ctes
In your case this would look like the following:
#CTE
#Entity
public class ResultCte {
#Id
Long parentId;
Long rootId;
int level;
}
CriteriaBuilder<Tuple> cb = criteriaBuilderFactory.create(entityManager, Tuple.class);
cb.withRecursive(ResultCte.class)
.from(Entity2.class, "e2")
.where("e2.id").in(idList)
.bind("parentId").select("e2.parent.id")
.bind("rootId").select("e2.id")
.bind("level").select("1")
.unionAll()
.from(Entity2.class, "e2")
.from(ResultCte.class, "cte")
.where("e2.id").eqExpression("cte.parentId")
.bind("parentId").select("e2.parent.id")
.bind("rootId").select("cte.rootId")
.bind("level").select("cte.level + 1")
.end()
.from(Entity1.class "a")
.from(ResultCte.class, "cte")
.where("a.id").eqExpression("cte.parentId")
.select("cte.rootId")
.select("min(a.time)")

Single Row Sub query return more than one row

I wrote a SQL query which updates the record, in most cases it runs fine, but from yesterday it fails to update the row.I am currently working on Spring MVC based Web application, in which I need to perform the DML operation by calling update()method.
I am using JDBC template and in my update method i wrote this query.
It fetches the 947 records for January month 2018 and I already checked all records are unique.
I am here stuck, i am not able to find the duplication of record.I thought this exception occurred because of multiple record, but I think i am wrong, there is something which i am not able to identify.
Here is the query:
UPDATE SALARY_DETAIL_REPORT_012018 sd
SET sd.EMP_ID =
(SELECT e.emp_id from EMPLOYEE e
WHERE e.VERIFY_STATUS = 1
AND e.RELIEF_TYPE IS NULL
AND e.emp_code = to_char(sd.emp_code)
AND e.EMP_TYPE_ID!=03)
WHERE EXISTS
(SELECT e.emp_id from EMPLOYEE e
WHERE e.VERIFY_STATUS = 1
AND e.emp_code = to_char(sd.emp_code)
AND e.EMP_TYPE_ID!=03 AND e.RELIEF_TYPE IS NULL)
AND sd.EMP_ID IS NULL
AND sd.REFERENCE_ID LIKE '203-%'
and HERE is Java Code in my DAOImpl class
public void update(String tableSuffix, String regionId, String circleId) {
String tabName = "SALARY_DETAIL_REPORT_" + tableSuffix;
String q = "UPDATE " + tabName + " sd"
+ " SET sd.EMP_ID = (SELECT e.emp_id "
+ " from EMPLOYEE e WHERE e.VERIFY_STATUS = 1 AND e.RELIEF_TYPE IS NULL "
+ " AND e.emp_code = to_char(sd.emp_code) AND e.EMP_TYPE_ID!=03) "
+ " WHERE "
+ " EXISTS (SELECT e.emp_id from EMPLOYEE e WHERE e.VERIFY_STATUS = 1 "
+ " AND e.emp_code = to_char(sd.emp_code) AND e.EMP_TYPE_ID!=03 AND e.RELIEF_TYPE IS NULL) "
+ " AND sd.EMP_ID IS NULL";
if (circleId != null && !circleId.trim().equals("")) {
q += " AND sd.REFERENCE_ID LIKE '" + circleId + "-%' ";
} else {
q += " AND sd.REFERENCE_ID LIKE '" + regionId + "-%' ";
}
// System.out.println("q " + q);
MapSqlParameterSource param = new MapSqlParameterSource();
getNamedParameterJdbcTemplate().update(q, param);
}
Please suggest me the best solution

You need to find the rows that prevent your query from running.
Run this query:
SELECT sd.emp_code, COUNT(*) as cnt
FROM EMPLOYEE e
WHERE e.VERIFY_STATUS = 1 AND
e.RELIEF_TYPE IS NULL AND
e.emp_code = to_char(sd.emp_code) AND
e.EMP_TYPE_ID <> 03
GROUP BY sd.emp_code
HAVING COUNT(*) > 1;
This has the candidate problems. What can you do? The simplest thing is one of the problems:
Change the SELECT to SELECT MAX(sd.emp_code)
Change the WHERE with AND rownum = 1

SELECT specific rows sql query Java 8

I've to extract some specific data from Oracle DB. I'm using Java 8.
I have to consider 3 columns from a TABLE : flag | date_1 | date_2.
The flag can have values 1,2 or 3 (The flag values updates from 1->2->3 over a period of time or based on certain events).
Say for two dateTime values X and Y, I need extract all the rows from the table where the date value is between X and Y.
If flag value is 1 or 2 then date_1 must be between X & Y irrespective of date_2. But if flag value is 3 then date_2 must be between X & Y irrespective of date_1.
For this I created three different queries with different parameters as flag=1/flag=2/flag=3. But this seems to be very inefficient.
String sql1 = "SELECT new xxxx.xxxx.xxx.Java.class.xxx ("
+ "t.flag, t.date_1, t.date_2)"
+ "FROM Table t "
+ "WHERE t.flag = :flagValue1 "
+ "AND t.date_1 >= :X "
+ "AND t.date_1 < :Y ";
String sql2 = "SELECT new xxxx.xxxx.xxx.Java.class.xxx ("
+ "t.flag, t.date_1, t.date_2)"
+ "FROM Table t "
+ "WHERE t.flag = :flagValue2 "
+ "AND t.date_1 >= :X "
+ "AND t.date_1 < :Y ";
String sql3 = "SELECT new xxxx.xxxx.xxx.Java.class.xxx ("
+ "t.flag, t.date_1, t.date_2)"
+ "FROM Table t "
+ "WHERE t.flag = :flagValue3 "
+ "AND t.date_2 >= :X "
+ "AND t.date_2 < :Y ";
List<E> list1 = this.entityManger.createQuery(sql1, model.class)
.setParameter("1", flag1)
.setParameter("X", firstDateValue)
.setParameter("Y", secondDateValue)
.getResultList();
List<E> list2 = this.entityManger.createQuery(sql2, model.class)
.setParameter("2", flag2)
.setParameter("X", firstDateValue)
.setParameter("Y", secondDateValue)
.getResultList();
List<E> list3 = this.entityManger.createQuery(sql3, model.class)
.setParameter("3", flag3)
.setParameter("X", firstDateValue)
.setParameter("Y", secondDateValue)
.getResultList();
List<E> finalList = new ArrayList<>();
finalList.addAll(list1);
finalList.addAll(list2);
finalList.addAll(list3);
return finalList;
Is there any other way of doing this? What could be better (single)query for this ?
PS: I wonder if I can use Java 8's Lambda Functions for just filtering the values from the List. Any suggestions regarding this ?
Thanks for the help.

If i understand it correctly you actually have 2 input parameters X & Y (aka from/to Date). And you always want to query the values of all flags regarding the entered date. Therefore a query like this would be more efficient:
select new Java.class.name (t.flag, t.date_1, t.date_2) from Table t
where
(t.flag in (1,2) and t.date_1 >= :X and t.date_1 < :Y)
or
(t.flag = 3 and t.date_1 2= :X and t.date_2 < :Y)
This would reduce the whole thing to just one query ... may still be inefficient depending on the dataset.

Multiple updates in one sql query

I have a table in H2 DB
Order
--------
id (key)
MarketId1
MarketId2
MarketId3
ListName1
ListName2
ListName3
From XML I'm getting list of ListOrder
public final class ListOrder
{
public long listId;
public String Name;
}
So I have 3 prepared statements
"UPDATE Order set " + ListName1 + " = ? WHERE " + MarketId1 + " = ?"
"UPDATE Order set " + ListName2 + " = ? WHERE " + MarketId2 + " = ?"
"UPDATE Order set " + ListName3 + " = ? WHERE " + MarketId3 + " = ?"
The in a method I prepare a list of PreparedStament to execute
final PreparedStatement statement1 = connection.prepareStatement(QUERY1);
final PreparedStatement statement2 = connection.prepareStatement(QUERY2);
final PreparedStatement statement3 = connection.prepareStatement(QUERY3);
for (ListOrder listOrder: listOrders)
{
statement1.setString(1, listOrder.Name);
statement1.setLong(2, listOrder.listId);
statement1.addBatch();
statement2.setString(1, listOrder.Name);
statement2.setLong(2, listName.listId);
statement2.addBatch();
statement3.setString(1, listName.Name);
statement3.setLong(2, listOrder.listId);
statement3.addBatch();
}
return new ArrayList<PreparedStatement>(){{add(statement1); add(statement2); add(statement3);}};
I'm a SQL noob. Is there any better way of doing it? I assume that MarketId 1 2 3 could be the same. ListNames could be null (there will be at least one)
UPDATE:
In code I would write something like this (prob change to HashMap)
for (ListOrder listOrder: listOrders)
{
for(Order order : orders)
{
if(order.marketID1 == listOrder.listID)
order.listName1 = listOrder.Name; //break if no dups
if(order.marketID2 == listOrder.listID)
order.listName2 = listOrder.Name;
if(order.marketID3 == listOrder.listID)
order.listName3 = listOrder.Name;
}
}

You can use update comma separated
UPDATE <TABLE>
SET COL1 = <VAL1>,
COL2= <VAL2>
WHERE <CONDITION>
Is it this what you expect as one update query?

Unless you are trying to update the same record, then there is no way to do this easily or efficiently in a single query. Otherwise, assuming this is the desired result, you could use an OR (or an AND if that is desired) statement such as:
UPDATE Order
SET ListName1=?, ListName2=?, ListName3=?
WHERE MarketId1=? OR MarketId2=? OR MarketId3=?
You might also consider updating your table to use a one:many relationship which might make your queries easier. For example:
Order
--------
id (key)
name
etc
Market_List
--------
id (key)
order_id (fk)
market
listname