We Keep Coding

java.sql.SQLSyntaxErrorException when using SQL variables in a query

This is my SQL query:
INSERT INTO SomeTable (UniqueID, SomeData, SomeNumber)
VALUES (#unique_id + 1, 'some value', '4234435435')
ON DUPLICATE KEY UPDATE
OtherNum = OtherNum + 1, SomeNumber = '999';
SELECT #unique_id := MAX(UniqueID) FROM SomeTable;
I use MariaDB. And I use HeidiSQL to manage databases, execute queries etc. In HeidiSQL my query works fine, but when I try to execute it in Java I get SQLSyntaxErrorException. Here is how I do it:
Connection connection = DriverManager.getConnection("jdbc:mariadb://localhost:3306/somedb?user=root&password=password");
Statement st = connection.createStatement();
ResultSet rs = st.executeQuery("INSERT INTO SomeTable (UniqueID, SomeData, SomeNumber)\n"
+ "VALUES (#unique_id + 1, 'some value', '4234435435')\n"
+ "ON DUPLICATE KEY UPDATE\n"
+ "OtherNum = OtherNum + 1, SomeNumber = '999';\n"
+ "SELECT #unique_id := MAX(UniqueID) FROM SomeTable;");
In the exception info I see it's caused by "SELECT #unique_id := MAX(UniqueID) FROM SomeTable;" line. Here is the full exception info:
Exception in thread "main" java.sql.SQLSyntaxErrorException: (conn:29) You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'SELECT #unique_id := MAX(UniqueID) FROM SomeTable' at line 4
Why does this happen and how to make it work?

Resultset throws syntax error when there are no records in database

Below I show my sql query which is dynamic in Java.
Calendar cal = Calendar.getInstance();
cal.add(Calendar.DAY_OF_YEAR, -365);
Adjust to 12 months before current month with 0 hrs and min
cal.set(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH), 1, 0, 0, 0);
String lastYearTime = String.valueOf(cal.getTimeInMillis() / 1000);
while(iterator.hasNext())
{
tablename = Database.getTableName((String)iterator.next());
fields = "status,count(*) as count";
query.append("select " + fields + " from " + tablename + " where");
query.append(" toid ='" + collegeId + "'");
query.append(" and dtstamp >='" + lastYearTime + "'");
query.append(" group by status");
if(i.hasNext())
query.append(" UNION ");
}
StringBuffer countquery = new StringBuffer("select status, SUM(count) as count from ( " + query + ")as temp group by status ");
ResultSet rs = Database.executeQuery(countquery.toString(), connection);
In the above query, tablename will be random based on other factors. collegeId can be any id. Status can be like dropout,pursuing or any random status.
When I execute my above query, result set works fine and data is displayed. But when there are no records in the database then it throws a sql syntax error 1064 stating
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 ')as temp group by status' at line 1

Problem1
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 ')as temp group by status' at line 1
You have a problem in your query:
select status, SUM(count) as count from ( " + query + ")as temp group by status
You should to make a space in your query here :
from ( " + query + ")as
replace this ")as with this ") as
EDIT
Problem2
SQL Exception : 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 ') as temp group by status' at line 1 SQL State : 42000 Error Code : 1064
Your query is a String so you should to put it between two 'query'
now replace this :
select status, SUM(count) as count from ( " + query + ")as temp group by status
By this :
select status, SUM(count) as count from ( '" + query + "') as temp group by status
Good luck.

Resultset throws syntax error when there are no records in database
No it doesn't. It throws a syntax-error exception when you have a syntax error in your query.

Want to convert and SQL to Hibernate Query Language

I have a requirement where I have to convert an SQL to HQL.
The SQL query is as follows:
select RT.tableNumber, temp.confirmationNumber from ReservationTable RT, (select R.tableNumber, R.confirmationNumber from Reservation R where R.date = 'someDate' and R.time = 'someTime' and R.reservationStatus = 'CONFIRMED') as temp where RT.tableNumber = temp.tableNumber and RT.tableNumber = 'someTableNumber' ;
I tried converting it to the following HQL:
select RT.tableNumber, temp.confirmationNumber from ReservationTable RT, (select R.tableNumber, R.confirmationNumber from Reservation R where R.date = :param1 and R.time = :param2 and R.reservationStatus = 'CONFIRMED') as temp where RT.tableNumber = temp.tableNumber and RT.tableNumber = :param3";
But when I run this HQL through Eclipse, I get the below error lines:
ERROR: line 1:102: unexpected token: (
ERROR: line 1:146: unexpected token: from
SEVERE: Servlet.service() for servlet [dispatcher] in context with
path [/RRSRestApp] threw exception [Request processing failed; nested
exception is org.hibernate.hql.internal.ast.QuerySyntaxException:
unexpected token: ( near line 1, column 102 [select RT.tableNumber,
temp.confirmationNumber from
com.kartik.restaurant.model.ReservationTable RT, (select
R.tableNumber, R.confirmationNumber from
com.kartik.restaurant.model.Reservation R where R.date = :param1 and
R.time = :param2 and R.reservationStatus = 'CONFIRMED') as temp where
RT.tableNumber = temp.tableNumber and RT.tableNumber = :param3; ]]
with root cause org.hibernate.hql.internal.ast.QuerySyntaxException:
unexpected token: ( near line 1, column 102 [select RT.tableNumber,
temp.confirmationNumber from
com.kartik.restaurant.model.ReservationTable RT, (select
R.tableNumber, R.confirmationNumber from
com.kartik.restaurant.model.Reservation R where R.date = :param1 and
R.time = :param2 and R.reservationStatus = 'CONFIRMED') as temp where
RT.tableNumber = temp.tableNumber and RT.tableNumber = :param3; ]
Can anyone help me with this?

According to hibernate documentation HQL subqueries can occur only in the select or where clauses.
for more detail please follow hibernate documentation

java.lang.IllegalArgumentException: org.hibernate.hql.internal.ast.QuerySyntaxException: unexpected token: start near line 1, column 84

I am getting an error while executing the query. The error is:
java.lang.IllegalArgumentException: org.hibernate.hql.internal.ast.QuerySyntaxException: unexpected token: start near line 1, column 84 [from com.services.om.entity.OrderLines where orderNumber in (:order_Numbers) start with parentLineIdentifier is null connect by prior orderLineIdentifier = parentLineIdentifier]
My DAO code is :
public List<OrderLineVO> findAllOrders(List<BigDecimal> orderNumbers) throws OrderManagementException {
try{
String getAllOrders = "from OrderLines where orderNumber in (:order_Numbers) order by orderDate desc ";
Query query = em.createQuery(getAllOrders,OrderLines.class);
query.setParameter("order_Numbers", orderNumbers);
List<OrderLines> orderLinesList = query.getResultList();
String queryParentChild = "from OrderLines where orderNumber in (:order_Numbers) start with parentLineIdentifier is null connect by prior orderLineIdentifier = parentLineIdentifier";
Query queryParent = em.createQuery(queryParentChild, OrderLines.class);
queryParent.setParameter("order_Numbers", orderNumbers);
List<OrderLines> orderLinesList2 = queryParent.getResultList();
return OrderLineUTIL.getOrderLines(orderLinesList);
}catch(Exception exception){
logger.error(exception.getMessage());
throw new OrderManagementException(exception.getMessage());
}
}
em.createQuery(queryParentChild, OrderLines.class); // Line is giving above error.
Any Suggestion ?
Also the entity class field variables are marked correctly in query.

JDBC error but no error when I run my query in MySQL workbench

I am running a query on a MySQL database, I am using JDBC and I am using MySQL workbench to run the query.
When I run it in MySQL work bench I get what I was expecting but when I run it in my code I get.
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 'SELECT Character.CharacterID, Character.CharacterName, Characte' at line 1
Here is the Java:
for (int i = 0; i < 3; i++) {
try {
result = s.executeQuery("USE `arbitrary-hero`; SELECT `Character`.CharacterID, `Character`.CharacterName, `Character`.CharacterLevel, SUM(ItemAttack), SUM(ItemHealth), SUM(ItemAgility), "
+ "SUM(ItemStrength), SUM(ItemSource) FROM `arbitrary-hero`.`Character` INNER JOIN `arbitrary-hero`.Character_Items ON `Character`.CharacterID = Character_Items.CharacterID INNER JOIN "
+ "Items ON Character_Items.ItemID = Items.ItemID WHERE Character_Items.Equiped = 1 and `Character`.CharacterName = "+ name[i] +" GROUP BY `Character`.CharacterName;;");
}
catch(Exception e) {
System.out.println(e);
}
}
s.close();
Here is the SQL:
SELECT `Character`.CharacterID, `Character`.CharacterName, `Character`.CharacterLevel, SUM(ItemAttack), SUM(ItemHealth), SUM(ItemAgility), SUM(ItemStrength),
SUM(ItemSource) FROM `arbitrary-hero`.`Character` INNER JOIN `arbitrary-hero`.Character_Items ON
`Character`.CharacterID = Character_Items.CharacterID INNER JOIN Items ON
Character_Items.ItemID= Items.ItemID WHERE Character_Items.Equiped = 1 and `Character`.CharacterName = "Maxinfet" GROUP BY `Character`.CharacterName;

Not sure, but I think you can't use two SQL commands together, so everything after the semi-colon is an error.