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coalesce mybatis switch case

Iam using coalesce mybatis switch case in my query, where iam getting error like
Error querying database. Cause: java.sql.SQLException: ORA-01427:
single-row subquery returns more than one row
this is my query
(select
(case when (coalesce(t1.col1,t2.col1, t1.col2, t1.col3) is null)
then (select sysdate from dual)
else (coalesce(t1.col1,t2.col1, t1.col2, t1.col3))
end )
from table1 t1
join table2 t2
on t1.id IN (t2.id))
Thanks in advance

Seems you have a lot of () but overall you should use = operator and not IN (t2.id) for join t2.id
select
case when coalesce(t1.col1,t2.col1, t1.col2, t1.col3) is null
then sysdate
else coalesce(t1.col1,t2.col1, t1.col2, t1.col3)
end
from table1 t1
join table2 t2 on t1.id = t2.id
And looking at the code you posted in sample you have a select as a column result and this select return several rows, ( this raise the error). You also have a mixin of join syntax some based on explicit join syntax some based on old implicit join syntax based on comma separated table name and where condition. You should try using this
<select id="Trigger" parameterType="hashmap" resultType="java.util.HashMap" flushCache="true">
SELECT
select case when coalesce(table1.col1, table2.col2,table1.col3, table1.col4) is null
then sysdate
else coalesce(table1.col1, table2.col2,table1.col3, table1.col4) end as "ProgressDate"
, table3.id as "ID"
from table1
INNER join table2 on table1.id = table2.id
INNER JOIN table3 ON table1.id = table3.id
INNER JOIN table4 table2.action = table4.action
WHERE table3.transaction = #{inputvaluepassed}
</select>

The query you mention in the question takes the place of a scalar subquery included in another... main query. I formatted the whole query (for readability) and it looks like this:
SELECT
(
select case when coalesce(table1.col1, table2.col2,table1.col3,
table1.col4) is null
then (select sysdate from dual)
else coalesce(table1.col1, table2.col2,table1.col3, table1.col4)
end
from table1
join table2 on table1.id = table2.id
) as "ProgressDate",
table3.id as "ID"
FROM table3, table1, table2, table4
WHERE table3.transaction = #{inputvaluepassed}
AND table1.id = table3.id
AND table2.id=table1.id and table2.action = table4.action
Now, by definition, scalar subqueries can only return zero or one row. In your case it seems that at runtime this subquery is returning multiple rows, and the main query crashes.
You'll need to somehow produce a single row at most: maybe by aggregating the rows (using GROUP BY), maybe by picking one row only from the result set (using LIMIT); there are other options. If we choose the to limit the rows to 1 at most your query could look like:
SELECT
(
select case when coalesce(table1.col1, table2.col2,table1.col3,
table1.col4) is null
then (select sysdate from dual)
else coalesce(table1.col1, table2.col2,table1.col3, table1.col4)
end
from table1
join table2 on table1.id = table2.id
limit 1 -- added this line
) as "ProgressDate",
table3.id as "ID"
FROM table3, table1, table2, table4
WHERE table3.transaction = #{inputvaluepassed}
AND table1.id = table3.id
AND table2.id=table1.id and table2.action = table4.action
This is just one possible cheap solution to the issue. A better understanding on how to pick the right row over multiples ones can produce a better solution.

QueryDSL re-uses table alias for sub-query

I'm having the following simple query:
return new JPAQuery<Job>().from(job)
.where(job.container.id.eq(cid)
.and(job.levels.any().in(levels)))
.fetch();
cid is of type Long, levels is a list of entities.
QueryDSL generates the following SQL:
SELECT t0.x, t0.y, t0.z
FROM job t0
WHERE (((t0.id = 19)
AND EXISTS (
SELECT 1
FROM job t0
JOIN (job_level_mapping t3
JOIN level t2 ON (t2.id = t3.level_id)) ON (t3.job_id = t0.id),
level t1
WHERE ((t1.id IN (74,77)) AND (t2.id = t1.id))))
AND (t0.job_type = 'SUBMIT'));
Note that the table alias t0 for table job is the same for the main query and sub-query. This leads to a wrong query result. If I manually rename the alias from the outer FROM from t0 to tx and also change (t3.job_id = t0.id) inside the sub-query to (t3.job_id = tx.id), then the query works as expected.
Is there some way to tell QueryDSL to use different table aliases for the main query and sub-query? Or is there a different way to write this query?
I'm using QueryDSL 4.1.4.
EDIT:
I'm now using the EntityManager directly with a JPA query and this is
working:
return getEm().createQuery("SELECT DISTINCT job FROM " +
"Job job " +
"WHERE job.container.id = :cid AND job.jobType = :jobType AND job.levels IN :levels", Job.class)
.setParameter("jobType", JobType.SUBMIT)
.setParameter("cid", cId)
.setParameter("levels", levels)
.getResultList();
SELECT DISTINCT t0.x, t0.y, t0.z
FROM job t0
JOIN (job_level_mapping t2
JOIN level t1 ON (t1.id = t2.level_id)) ON (t2.job_id = t0.id)
WHERE (((t0.cid = ?) AND (t0.job_type = ?)) AND (t1.id IN (?,?)));

How do I write this JPQL query with subquery?

I'm trying to traduce that SQL sentence
SELECT
operationalobjective.idoperationalobjective,
pno_oo.name
FROM
public.operationalobjective,
public.policynamedobject pno_oo
WHERE
pno_oo.idpolicynamedobject = operationalobjective.idoperationalobjective AND
operationalobjective.idoperationalobjective NOT IN
(
SELECT
operationalobjective.idoperationalobjective
FROM
public.operationalobjective,
public.goal,
public.policy,
public.policynamedobject pno_oo,
public.policynamedobject pno_p
WHERE
goal.idpolicy = policy.idpolicy AND
goal.idoperationalobjective = operationalobjective.idoperationalobjective AND
pno_oo.idpolicynamedobject = operationalobjective.idoperationalobjective AND
pno_p.idpolicynamedobject = policy.idpolicy AND
policy.idpolicy = <number>
);
Having in mind Policy and OperationalObjective both extends PolicyNamedObject, I'm trying to traduce that into JPQL:
SELECT oo FROM OperationalObjective oo
WHERE oo.idoperationalobjective NOT IN
(
SELECT oo.idoperationalobjective
FROM OperationalObjective oo, Goal g, Policy p
WHERE g.policy = :policy AND g.operationalobjective = oo AND p = :policy
)
But when I execute that query via JPA, it raises an exception saying:
ERROR: missing FROM-clause entry for table <<t5>>
SELECT t7.idpolicynamedobject, t7.type, t7.description, t7.name, t0.idoperationalobjective, t0.idobjectivescategory
FROM public.OperationalObjective t0 INNER JOIN public.PolicyNamedObject t7 ON t0.idoperationalobjective = t7.idpolicynamedobject
WHERE (NOT (t0.idoperationalobjective IN
(
SELECT t5.idoperationalobjective
FROM public.OperationalObjective t1 CROSS JOIN public.Goal t2 CROSS JOIN public.policy t3
INNER JOIN public.PolicyNamedObject t4 ON t3.idpolicy = t4.idpolicynamedobject
INNER JOIN public.PolicyNamedObject t6 ON t5.idoperationalobjective = t6.idpolicynamedobject, public.OperationalObjective t5
WHERE (t2.idpolicy = ? AND t2.idoperationalobjective = t5.idoperationalobjective
AND t3.idpolicy = ?) AND t6.type = ?))) AND t7.type = ?} [code=0, state=42P01]
I've executed the SQL sentence using PgAdmin and it retrieved what I wanted, but I don't know what I am doing wrong translating it into JPQL... any idea?
Thank you in advance :)

I suspect you will need to refactor your JPQL statement to use subquery 'EXISTS' as the IN statement doesn't support a sub select. Hopefully this will point you in the right direction.
SELECT oo FROM OperationalObjective oo
WHERE NOT EXISTS
(
SELECT oosub
FROM OperationalObjective oosub
JOIN oosub.goal g
JOIN g.policy p
WHERE <<where conditions>>
)
Oracle docs

Cryptic MSSQL error message

Previous related thread: Join in Query WHERE clause
I'm getting this error:
com.microsoft.sqlserver.jdbc.SQLServerException: Incorrect syntax near '.'.
My SQL Statement:
SELECT products.id, products.name products.extended_description, products.catalogid, products.image1, products.image2, products.stock, products.price, manufacturer.manufacturer, products.weight
FROM products
JOIN manufacturer ON (products.manufacturer = manufacturer.id)
JOIN product_category ON (product_category.catalogid = products.catalogid)
JOIN category ON (category.id = product_category.id)
WHERE category.category_name = ?;
What do I have wrong here? My statement looks correct to me...

You are missing a comma between products.name and products.extended_description. It thinks that products.extended_description is the alias. If it is then put []s around it. [products.extended_description]. Otherwise put in the missing comma.
SELECT products.id, products.name, products.extended_description, products.catalogid,
products.image1, products.image2, products.stock, products.price,
manufacturer.manufacturer, products.weight
FROM products
JOIN manufacturer ON (products.manufacturer = manufacturer.id)
JOIN product_category ON (product_category.catalogid = product.catalogid)
JOIN category ON (category.id = product_category.id)
WHERE category.category_name = ?;

You forgot a comma after products.name
Should be:
SELECT products.id, products.name, products.extended_description, ...

Jave SQL executeQuery throws up error for valid sql statement

I am using java java.sql.* for querying from SQLite DB. I found a starnge issue where I write a sqlString as:
SELECT n.Name as Name,
c.Value as Value0,
d.Value as Value1
FROM (Table1 c inner join Table2 n on c.NameID = n.ID),
Table3 d
WHERE c.RunID = 1
and d.RunID = 2
and c.NameID = d.NameID
The statement stmt.executeQuery(sqlQuery) throws the following exception:
java.sql.SQLException: no such column: n.Name
at org.sqlite.DB.throwex(DB.java:288)
at org.sqlite.NativeDB.prepare(Native Method)
at org.sqlite.DB.prepare(DB.java:114)
at org.sqlite.Stmt.executeQuery(Stmt.java:89).............
Name is already part of the Table2 table. The same statement is working fine from SQLite command prompt. But when I remove the open brackets and try to execute from java, there is no problem. Any idea why this happens so?

Try something like this, use sub resultset
SELECT rs1.Name AS NAME,
rs1.Value0 AS Value0,
d.Value AS Value1
FROM (SELECT n.Name AS NAME,
c.Value AS Value0,
d.Value AS Value1
FROM Table1 c INNER JOIN Table2 n ON c.NameID = n.ID) rs1,
Table3 d
WHERE c.RunID = 1
AND d.RunID = 2
AND c.NameID = d.NameID

The variables used in inner queries could not be referred outside. For example, you have used the variable n in inner sql. But you are referring it outside. The variable n is out of it's scope there.

Hi Friends Thanks for your fast responses. I am able to solve this problem. I am sharing this so if any1 else get this problem can do this:
SELECT ABC.Name as Name, ABC.Value as Value0, d.Value as Value1
FROM
(select n.Name as Name, c.Value as Value0 from Table1 c
inner join Table2 n on c.NameID = n.ID) AS ABC,
Table3 d ......;
Regards,Tor