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java.sql.SQLSyntaxErrorException: ORA-00903: invalid table name in Java on select count on function return

I am getting Table not found exception for the following query
select count(1) from (pkg_queries.query1function(id));
Type table_type is Table of record_type
query1function is a function from the package which returns table_type.
In java code on prepared statement execution, the select query gives an Invalid Table name Exception. The Same query is successfully executed in Oracle SQL developer.
Is it possible that it is a Java Oracle Driver issue? How to resolve it?

The column name is not valid - error

I am getting this error while I am fetching value from resultset.
Error : com.microsoft.sqlserver.jdbc.SQLServerException: The column name company.short_name is not valid
CASE 1 :
select company.short_Name,location_name from company,location;
this query is executing fine on SQL Server but in my java code when I trying to retrieve value like resultset.getString("company.short_name"); that time this give the above error.
CASE 2 :
select company.short_Name short_name,location_name from company,location;
and retrieve value like resultset.getString("short_name"); than it work fine with both database MySQL and MSSQL.
I am migrating my database from MySQL to MSSQL.above case 1 is work fine in MySQL, but why it is not work in MSSQL?

resultset.getString("company.short_name"); is wrong here. No need to specifying fully qualified name while trying to fetch the data in your application. Just specify the column name like resultset.getString("short_name");.
Cause even though you say select company.short_Name ... query out the column name as short_Name since that's what defined in table schema.
In case both tables has same column which may result in ambiguity, give a alias name to the columns like
select company.short_Name as company_shortname,
location.short_Name as location_shortname,
location.location_name from company,location;

add the following to your application.properties file
spring.jpa.hibernate.naming.physical-strategy=org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl

When you do
select company.short_Name,location_name from company,location;
This query outs the column name short_Name and resultSet would also have short_Name
since the company.short_name doesnt exist you get an error.

the function resultset.getString(String columnLabel)
Retrieves the value of the designated column in the current row of this ResultSet object as a String in the Java programming language.
Parameters:
columnLabel the label for the column specified with the SQL AS clause. If the SQL AS clause was not specified, then the label is the name of the column
Returns:
the column value; if the value is SQL NULL, the value returned is null
Throws:
SQLException - if the columnLabel is not valid; if a database access error occurs or this method is called on a closed result set
in the function resultset.getString(String columnLabel), the arg is a column name for executing sql, the statement select company.short_Name,location_name from company,location; will get a result set, which has table headers short_Name,location_name

SQL generated by Hibernate invalid for MS SQL

Hibernate (HQL) generated the following SQL for which I inserted the parameters:
select
sum(activity0_.calculated_work) as col_0_0_
, employee2_.id as col_1_0_
, projectele1_.id as col_2_0_
from
activity activity0_
inner join generic_object activity0_1_ on activity0_.id=activity0_1_.id
left outer join project_element projectele1_ on activity0_.project_element_id=projectele1_.id
left outer join employee employee2_ on activity0_.owner_id=employee2_.id
left outer join org_unit orgunit3_ on employee2_.org_unit_id=orgunit3_.id
where
activity0_1_.deleted=0 and
activity0_.client_id=22
group by
employee2_.id order by SUM(activity0_.calculated_work) DESC
Error message: Column 'project_element.id' is invalid in the select list because it is not contained in either an aggregate function or the GROUP BY clause.
I executed this SQL directly in the SQL Server Studio with the same result. I commented this line:
, projectele1_.id as col_2_0_
The SQL was then accepted by the SQL Server
The table project_element definitely has a column with the name id it is also referenced in the LEFT OUTER JOIN and there this column is not causing an error.
Removing the alias projectele1_ had no effect.
To me this looks like a really simple SQL statement. I cannot imagine what is wrong with it and the error message is not helping at all. Any ideas what could be wrong with the SQL?

Your SQL syntax is wrong.If you add projectele1_.id to group by clause it will work.Only aggregate functions work in select statement with group by clause.Or if you remove projectele1_.id from select it will work fine.

My mistake. I should have read the error message several times. projectele1_id is not in the group by clause. MS SQL does not allow to include such a column into the select list. This seems to be a consistency check.
Too bad though that the usage of HQL leads to such an exception in SQL Server but not in MySQL Server.

Hibernate: column does not exist

When I try to load an Entity with Hibernate I get the following error in postgres-log:
ERROR: column appuser0_.device_token does not exist at character 35
STATEMENT: select appuser0_.id as id1_27_0_, appuser0_.device_token as device_t2_27_0_,....
The column device_token definitely exists - and if I copy-paste the whole logged statement and execute it in PGAdmin, I get the expected result.
So what do I forget? What is the difference between the Hibernate statement and the manually executed one?

This issue was caused by the multi tenant configuration so that the wrong DataSource has been chosen.

Depending on how you defined the query, the problem might be located somewhere else: For example, HQL Queries are using the "property-names" of the class, not the column names.
And if you have something like:
#Column("device_token")
private String deviceToken;
Then your HQL-Query should target "deviceToken" and not "device_token". We also encountered a similar error once: Hibernate was reporting "user_id" is missing, because we named the property "userId" with the underscored version for the column name only.
This might be not the problem for you but worth double checking it.

Delete column from database

I have a database with so many values.How can i delete a specified row using a query.
I am using following query for deletion.I want to delete a row whith the help of colum name=user_name.(user_name=example).
But example named row is not present at the table.is shows error.Any if exist query for this
preparedStatement = (PreparedStatement) connection.prepareStatement("DELETE FROM users WHERE IF EXISTS user_name=example");
preparedStatement.executeUpdate();
The following error occur when i trying to compile
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'EXISTS user_name='example'' at line 1

remove IF EXISTS
use user_name='example' (with quotes) or even better user_name=? with PreparedStatement
use preparedStatement.executeUpdate()
it shouldnt throw any error even if no result

I think you just forgot the apostrophs that span the String literal 'example':
DELETE FROM users WHERE user_name='example'.
The 'WHERE EXISTS' is unnecessary here!
Greetings
Christopher

I tried here in my computer this way and works fine
PreparedStatement pt =con.prepareStatement("DELETE FROM users WHERE IF EXISTS user_name='"+"example'");
pt.executeUpdate();
I made a temporary table and run it