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Getting result set from a statement block [duplicate]

This question already has answers here:
Queries returning multiple result sets
(7 answers)
jdbc sql error: statement did not return a result set
(2 answers)
Is "SET NOCOUNT OFF" necessary in a stored procedure?
(4 answers)
Closed 1 year ago.
I have a huge script with a lot of logic and with the select statement in the end which returns final result.
As many people know JDBC is not supposed to run SQL scripts (with multiple statements) out of the box so I wrapped script into begin ... end block making it a single statement block so that I can execute it in one go.
All seems to be good... except I can't get result set from begin ... end block (code below prints "No data"). So I had to split script into two pieces - all the logic (1) + final select statement (2).
val url = "jdbc:sqlserver://" + mssqlServer + ";integratedSecurity=true;"
val connMSSQL = java.sql.DriverManager.getConnection(url)
val qqq0 = """begin
|
|if object_id('tempdb..#ttt') is not null drop table #ttt
|
|create table #ttt(i int, v varchar(10))
|
|insert into #ttt
|select 0, 'qwerty' union all select 1, 'hello'
|
|select 1 id, 0 value
|
|end""".stripMargin
val qqq = "select * from #ttt"
val stmt = connMSSQL.createStatement()
stmt.execute(qqq0)
if (stmt.getResultSet==null) println("No data")
val rs = stmt.executeQuery(qqq)
The questions is - whether there is any way to get result set from begin ... end block? If the answer is no then the explanation would be highly appreciated.
PS. If I wrap all the code into procedure my_proc I can easily get result but creating objects in DB is not an option in my specific situation.
Works this way
val stmt1 = connMSSQL.createStatement()
stmt1.execute("my_db..my_proc")
val rs1 = stmt1.getResultSet
And this way as well
val stmt2 = connMSSQL.createStatement()
val rs2 = stmt2.executeQuery("my_db..my_proc")
In both cases record set equals null when code is used with anonymous block instead of procedure.
PPS. No need to mention that if copy and paste begin ... end block into management studio and run it with F5 then it returns result without any problems.
UPDATE
For me behavior is still weird but luckily it works only with set nocount on AND getMoreResults.
However... it works for the firs statement only.
So if i include nocount into the original SQL script then for the code below
val stmt1 = connMSSQL.createStatement()
println(stmt1.execute(qqq0))
println(stmt1.getMoreResults())
if (stmt1.getResultSet==null) println("No data") else println("Yes data")
val stmt2 = connMSSQL.createStatement()
println(stmt2.execute(qqq0))
println(stmt2.getMoreResults())
if (stmt2.getResultSet==null) println("No data") else println("Yes data")
Output is following
false
true
Yes data
false
false
No data
Now the question is how to get it working properly not for the first statement only.
UPDATE 2
None of the links provided by moderator explain unexpected behavior with createStatement.

Well, as I wrote in the question, in case of createStatement it works for the first JDBC statement only and after calling getMoreResults.
For prepareStatement it works for all calls. Also it does not matter if I use executeQuery or execute + getResultSet.
val stmt1 = connMSSQL.prepareStatement(qqq0)
if (stmt1.executeQuery()==null) println("No data") else println("Yes data")
val stmt2 = connMSSQL.prepareStatement(qqq0)
println(stmt2.execute)
if (stmt2.getResultSet()==null) println("No data") else println("Yes data")
Output
Yes data
true
Yes data
So the solution is - using prepareStatement and set nocount on.

Try with CallableStatement and registerOutParameter.
val url = "jdbc:sqlserver://" + mssqlServer + ";integratedSecurity=true;"
val connMSSQL = java.sql.DriverManager.getConnection(url)
val qqq0 = """begin
|
|if object_id('tempdb..#ttt') is not null drop table #ttt
|
|create table #ttt(i int, v varchar(10))
|
|insert into #ttt
|select 0, 'qwerty' union all select 1, 'hello'
|
|select 1 id, 0 value
|
| ? := 123;
|
|end""".stripMargin
// val qqq = "select * from #ttt"
// val stmt = connMSSQL.createStatement()
// stmt.execute(qqq0)
// if (stmt.getResultSet==null) println("No data")
// val rs = stmt.executeQuery(qqq)
try (CallableStatement stmt = connMSSQL.prepareCall(qqq0)) {
stmt.registerOutParameter(1, Types.INTEGER);
stmt.execute();
System.out.println(stmt.getInt(1)); // Display "123";
}

Executing multiple procedure calls at once in jdbc

FYI, None of the solutions mentioned in this answer have worked for me. I intend to execute multiple procedure call in one sql query.
The Mysql code is:
SET #SYSTEM_ID = (SELECT `id` FROM `users_admin` WHERE `username`='my_username');
SET #PAYMENT_MODE = 0;
CALL payment_mode_add(#SYSTEM_ID, 'TEST', TRUE, #PAYMENT_MODE);
CALL payment_add(#SYSTEM_ID, #PAYMENT_MODE,
'receipt/00',1000.50,#TEMP_ID);
The way it's supposed to work is, Procedure "payment_mode_add" sets out an output parameter which is supposed to be used as an input parameter by the procedure "payment_add".I know that executing multiple queries at once is not possible in Java, but the method i intend to use here works well in languages like PHP. Definition for payment_mode_add is:
# -- PAYMENT-MODE ADD
DELIMITER //
DROP PROCEDURE IF EXISTS `payment_mode_add` //
# -- remove above
CREATE PROCEDURE `payment_mode_add`(IN _author INT, IN _name VARCHAR(20), IN _active BOOLEAN, OUT _id INT)
BEGIN
# -- declare
IF NOT EXISTS (SELECT `id` FROM `users_admin` WHERE `id`=_author AND `active`=TRUE) THEN SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = 'Invalid Author'
ELSEIF EXISTS (SELECT `id` FROM `gym_form_hhq` WHERE `name`=_name) THEN SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = '\'Payment Mode\' already exists'
ELSE
SET _active = IFNULL(_active,FALSE)
INSERT INTO `payment_mode`(`name`, `active`, `author`)
VALUES ( _name , _active , _author )
SET _id = LAST_INSERT_ID()
SELECT * FROM `payment_mode` WHERE `id`=_id
END IF
END //
DELIMITER ;
Definition for "payment_add":
# -- PAYMENT ADD
DELIMITER //
DROP PROCEDURE IF EXISTS `payment_add` //
# -- remove above
CREATE PROCEDURE `payment_add`(IN _author INT, IN _mode INT, IN _receipt VARCHAR(50), IN _amount FLOAT, OUT _id INT)
BEGIN
# -- declare
IF NOT EXISTS (SELECT `id` FROM `users_admin` WHERE `id`=_author AND `active`=TRUE) THEN SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = 'Invalid Author'
ELSEIF NOT EXISTS (SELECT `id` FROM `payment_mode` WHERE `id`=_mode AND `active`=TRUE) THEN SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = 'Invalid Payment Mode'
ELSE
SET _receipt = IFNULL(_receipt, NOW())
SET _amount = IFNULL(_amount, 0)
INSERT INTO `payment`(`mode`, `reciept`, `amount`, `author`)
VALUES (_mode , _receipt , _amount , _author)
SET _id = LAST_INSERT_ID()
SELECT * FROM `payment` WHERE `id`=_id
END IF
END
This is just a basic example for some more complex problems that i'm facing in JDBC. Is there any way that i can execute all those 4 queries at once though JDBC or any other method that can give me the output i intend to achieve?

Since this question was getting many upvotes and i had found a solution to it, i'm answering it.
So all you have to do is write a method that takes in an array of string sql queries as its parameter, executes all the queries(in the array) one by one, and returns the last ResultSet. Example:
public ResultSet runMutltipleQueries(String [] arrayOfQueries) throws SQLException{
ResultSet rs = null;
Statement stmnt= con.createStatement();
boolean rsReturned=false;
for(int i=0; i<arrayOfQueries.length;i++){
rsReturned = stmnt.execute(arrayOfQueries[i]);
}
if(rsReturned){
rs= stmnt.getResultSet();
}
return rs;
}
And while calling the method,
queries= new String [] {"SET #SYSTEM_ID = (SELECT `id` FROM `users_admin` WHERE `username`='"+model.getUserName()+"');",
"SET #TRANSACTION_ID = (select `user_data`.`transaction` from `user_data` where id= "+idText.getText()+");",
"SET #FREEZE_ID = NULL;",
// set payment id to 0 for now, update it in pay operation.
"SET #PAYMENT_ID = NULL;",
"CALL user_freeze_add(#SYSTEM_ID, #TRANSACTION_ID, '"+FreezeStartDate.getValue()+"', '"+FreezeStartDate.getValue().plusDays(Integer.parseInt(freezeAvailabletext.getText()))+"', #PAYMENT_ID, #FREEZE_ID);"
};
ResultSet rs= DatabaseHandler.getInstance().runMutltipleQueries(queries);

PreparedStatement.executeUpdate() is not working for Oracle

I am using PreparedStatement for executing the update query.
The following is the query:
String callersUpdateQuery = "update W67U999S a set pcrdattim= ? where exists (select b.CRDATTIM, b.RECORDCD, b.CRNODE, b.UNITCD, b.WRKTYPE from W03U999S b where a.PCRDATTIM = ? and a.CCRDATTIM = b.CRDATTIM and a.CRECORDCD = b.RECORDCD and a.CCRNODE = b.CRNODE and a.PRECORDCD = 'F' and a.PCRNODE = '01' and b.WRKTYPE = 'CALLER' and b.UNITCD=? and a.crecordcd='T')";
The below is the java code that should update the records:
preparedStatement = dbConnection.prepareStatement(callersUpdateQuery);
preparedStatement.setString(1,newFolderCrdattim);
preparedStatement.setString(2,crdattim);
preparedStatement.setString(3,businessAreaName.trim());
int j = preparedStatement.executeUpdate();
But preparedStatement.executeUpdate() is not updating the required rows and returning the updated rows count as zero. Weirdly, the same sql query when I execute at the database end, the records are getting updated.
My database is Oracle and the schema of the table that should be updated is below:
Name Null Type
----------- -------- ----------
PCRDATTIM NOT NULL CHAR(26)
PRECORDCD NOT NULL CHAR(1)
PCRNODE NOT NULL CHAR(2)
RECORDTYPE NOT NULL NUMBER(3)
CCRDATTIM NOT NULL CHAR(26)
CRECORDCD NOT NULL CHAR(1)
CCRNODE NOT NULL CHAR(2)
CRDATTIM NOT NULL CHAR(26)
LINKRULE_ID NOT NULL NUMBER(14)
Can anyone guess what's wrong with the code or query?

First, did you check for existence of tuples on the select you're using as condition in where clause?
If there are rows being returned. The issue may be related to the transaction in which you're executing your update statement. Double check for your transaction mode and if it is really being committed.
As a query optimization suggestion I'd change the statement to:
String callersUpdateQuery =
"update W67U999S a
set pcrdattim= ?
where
a.PCRDATTIM = ?
and a.PRECORDCD = 'F'
and a.PCRNODE = '01'
and a.CRECORDCD ='T'
and exists (
select
b.CRDATTIM,
b.RECORDCD,
b.CRNODE,
b.WRKTYPE
from W03U999S b
where
b.CCRDATTIM = a.CRDATTIM
and b.CRECORDCD = a.RECORDCD
and b.CCRNODE = a.CRNODE
and b.WRKTYPE = 'CALLER'
and b.UNITCD=?
)";
That way you will be first reducing the tuples from a then use it to narrow the b tuples only to those that match.

Oracle CHAR type is the culprit here. The columns that I want to update are of type CHAR. That's causing the issue. This link helped me in figuring out the solution: Oracle JDBC and Oracle CHAR data type

Execute multiple queries in java using MySQL JDBC [duplicate]

Hi I was wondering if it is possible to execute something like this using JDBC as it currently provides an exception even though it is possible in the MySQL query browser.
"SELECT FROM * TABLE;INSERT INTO TABLE;"
While I do realize that it is possible with having the SQL query string being split and the statement executed twice but I was wondering if there is a one time approach for this.
String url = "jdbc:mysql://localhost:3306/";
String dbName = "databaseinjection";
String driver = "com.mysql.jdbc.Driver";
String sqlUsername = "root";
String sqlPassword = "abc";
Class.forName(driver).newInstance();
connection = DriverManager.getConnection(url+dbName, sqlUsername, sqlPassword);

I was wondering if it is possible to execute something like this using JDBC.
"SELECT FROM * TABLE;INSERT INTO TABLE;"
Yes it is possible. There are two ways, as far as I know. They are
By setting database connection property to allow multiple queries,
separated by a semi-colon by default.
By calling a stored procedure that returns cursors implicit.
Following examples demonstrate the above two possibilities.
Example 1: ( To allow multiple queries ):
While sending a connection request, you need to append a connection property allowMultiQueries=true to the database url. This is additional connection property to those if already exists some, like autoReConnect=true, etc.. Acceptable values for allowMultiQueries property are true, false, yes, and no. Any other value is rejected at runtime with an SQLException.
String dbUrl = "jdbc:mysql:///test?allowMultiQueries=true";
Unless such instruction is passed, an SQLException is thrown.
You have to use execute( String sql ) or its other variants to fetch results of the query execution.
boolean hasMoreResultSets = stmt.execute( multiQuerySqlString );
To iterate through and process results you require following steps:
READING_QUERY_RESULTS: // label
while ( hasMoreResultSets || stmt.getUpdateCount() != -1 ) {
if ( hasMoreResultSets ) {
Resultset rs = stmt.getResultSet();
// handle your rs here
} // if has rs
else { // if ddl/dml/...
int queryResult = stmt.getUpdateCount();
if ( queryResult == -1 ) { // no more queries processed
break READING_QUERY_RESULTS;
} // no more queries processed
// handle success, failure, generated keys, etc here
} // if ddl/dml/...
// check to continue in the loop
hasMoreResultSets = stmt.getMoreResults();
} // while results
Example 2: Steps to follow:
Create a procedure with one or more select, and DML queries.
Call it from java using CallableStatement.
You can capture multiple ResultSets executed in procedure.
DML results can't be captured but can issue another select
to find how the rows are affected in the table.
Sample table and procedure:
mysql> create table tbl_mq( i int not null auto_increment, name varchar(10), primary key (i) );
Query OK, 0 rows affected (0.16 sec)
mysql> delimiter //
mysql> create procedure multi_query()
-> begin
-> select count(*) as name_count from tbl_mq;
-> insert into tbl_mq( names ) values ( 'ravi' );
-> select last_insert_id();
-> select * from tbl_mq;
-> end;
-> //
Query OK, 0 rows affected (0.02 sec)
mysql> delimiter ;
mysql> call multi_query();
+------------+
| name_count |
+------------+
| 0 |
+------------+
1 row in set (0.00 sec)
+------------------+
| last_insert_id() |
+------------------+
| 3 |
+------------------+
1 row in set (0.00 sec)
+---+------+
| i | name |
+---+------+
| 1 | ravi |
+---+------+
1 row in set (0.00 sec)
Query OK, 0 rows affected (0.00 sec)
Call Procedure from Java:
CallableStatement cstmt = con.prepareCall( "call multi_query()" );
boolean hasMoreResultSets = cstmt.execute();
READING_QUERY_RESULTS:
while ( hasMoreResultSets ) {
Resultset rs = stmt.getResultSet();
// handle your rs here
} // while has more rs

You can use Batch update but queries must be action(i.e. insert,update and delete) queries
Statement s = c.createStatement();
String s1 = "update emp set name='abc' where salary=984";
String s2 = "insert into emp values ('Osama',1420)";
s.addBatch(s1);
s.addBatch(s2);
s.executeBatch();

Hint: If you have more than one connection property then separate them with:
&
To give you somthing like:
url="jdbc:mysql://localhost/glyndwr?autoReconnect=true&allowMultiQueries=true"
I hope this helps some one.
Regards,
Glyn

Based on my testing, the correct flag is "allowMultiQueries=true"

Why dont you try and write a Stored Procedure for this?
You can get the Result Set out and in the same Stored Procedure you can Insert what you want.
The only thing is you might not get the newly inserted rows in the Result Set if you Insert after the Select.

I think this is the easiest way for multy selection/update/insert/delete. You can run as many update/insert/delete as u want after select (you have to make a select first(a dummy if needed)) with executeUpdate(str) (just use new int(count1,count2,...)) and if u need a new selection close 'statement' and 'connection' and make new for next select. Like example:
String str1 = "select * from users";
String str9 = "INSERT INTO `port`(device_id, potition, port_type, di_p_pt) VALUE ('"+value1+"', '"+value2+"', '"+value3+"', '"+value4+"')";
String str2 = "Select port_id from port where device_id = '"+value1+"' and potition = '"+value2+"' and port_type = '"+value3+"' ";
try{
Class.forName("com.mysql.jdbc.Driver").newInstance();
theConnection=(Connection) DriverManager.getConnection(dbURL,dbuser,dbpassword);
theStatement = theConnection.prepareStatement(str1);
ResultSet theResult = theStatement.executeQuery();
int count8 = theStatement.executeUpdate(str9);
theStatement.close();
theConnection.close();
theConnection=DriverManager.getConnection(dbURL,dbuser,dbpassword);
theStatement = theConnection.prepareStatement(str2);
theResult = theStatement.executeQuery();
ArrayList<Port> portList = new ArrayList<Port>();
while (theResult.next()) {
Port port = new Port();
port.setPort_id(theResult.getInt("port_id"));
portList.add(port);
}
I hope it helps

SELECT then UPDATE all rows from RESULTSET

I am wanting to update all the rows in the RESULTSET from the SELECT in one single UPDATE query.
Here is what I have come up with so far:
SELECT id_queue, status FROM table WHERE status IN (0,2) ORDER BY status, id_queue ASC FOR UPDATE;
UPDATE table SET status = 97 WHERE id_queue= " + id_combined + ";
So, I guess I need to take all the id_queue ids, put them together like 1,2,3,4,5,6,7,8 into id_combined.
Any idea the best way to do this in JAVA?
NOTE: I am not just trying to update all with status 0 & 2 to 97, I want to use the select resultset somewhere else.

Not sure what SQL dialect you are using, but this is worth a try:
update table set status = 97 where ID_queue in
(SELECT id_queue FROM table WHERE status IN (0,2))

Use a StringBuilder to collect the id numbers returned in the ResultSet, and then use this to build an update query.
First, execute the query and collect the ID's.
StringBuilder ids = new StringBuilder();
Statement statement = this.conn.createStatement();
statement.executeQuery("SELECT id_queue, status FROM table WHERE status IN (0,2) ORDER BY status, id_queue ASC;");
ResultSet rs = statement.getResultSet();
while (rs.next()) {
if (ids.length() > 0)
ids.append(',');
ids.append(rs.getInt("id_queue"));
}
// use the resultset for whatever else you want
rs.close();
Then, perform the update.
if (ids.length() > 0) {
statement = this.conn.createStatement();
statement.executeUpdate("UPDATE table SET status = 97 WHERE id_queue In ("+ids.toString()+");");
}

One approach to do this is a nested query. That is, you can put a SELECT inside your UPDATE sort of like this:
UPDATE table SET status = 97 WHERE id_queue IN (SELECT id_queue
FROM table
WHERE status IN(0,2))
Google for sql 'nested query' or 'subquery' for more info.

My thought would be something along the lines for (not working code)
List<Integer> ids = new ArrayList<Integer>();
for(Row row : ResultSet.rows()) {
ids.add(row.get("id_queue");
}
String sql = "UPDATE table SET status = 97 WHERE id_queue IN (" +
StringUtils.join(ids, ",") +
")";
Using the StringUtils class from Apache.
Obviously, since you said you don't want to convert ALL items in the ResultSet to status 97:
You can't just have an SQL query that does the SELECT/SET at the same time (unless you can formulate in SQL what the additional criteria are), and
You'll need up modify the for loop to select out only the rows you actually want to modify
For completeness sake, the following would do the update (if you wanted to modify all rows) with pure SQL
UPDATE table SET status = 97
WHERE status IN (0,2)

to avoid the error you need to give the SELECT statment an alias:
try this:
UPDATE table SET status = 97 WHERE id_queue IN (SELECT * FROM (SELECT id_queue
FROM table
WHERE status IN(0,2)) MyResult)
MyResult is an alias to the select query