I have something like this in my sql query
private static final String QUERY_PHYSICIAN_INFO= "SELECT * FROM PHYSICIAN_INFO WHERE ? = ?";
but following is not working..
Connection conn = null;
PreparedStatement stmt = null;
String logintype;
if(isInteger(id))
{
logintype="BADGEID";
}else{
logintype="ID";
}
stmt=conn.prepareStatement(QUERY_PHYSICIAN_INFO);
stmt.setString(1, logintype);
stmt.setString(2, id);
ResultSet rs = stmt.executeQuery();
Physician phs = null;
Is there any special reason for this?
Thanks in advance.
? is for passing parameters, not field names.
If you must do this, build the SQL as
"SELECT * FROM PHYSICIAN_INFO WHERE " + "BADGEID" + " = ?"
You could try something like this because ? can be used only for passing parameters or you could use a database function and then pass values to the function.
private static final String QUERY_PHYSICIAN_INFO_BADGE= "SELECT * FROM PHYSICIAN_INFO WHERE BADGEID = ?";
private static final String QUERY_PHYSICIAN_INFO_ID= "SELECT * FROM PHYSICIAN_INFO WHERE ID = ?";
Connection conn = null;
PreparedStatement stmt = null;
String logintype;
if(isInteger(id))
{
stmt=conn.prepareStatement(QUERY_PHYSICIAN_INFO_BADGE);
}else{
stmt=conn.prepareStatement(QUERY_PHYSICIAN_INFO_ID);
}
stmt.setString(1, id);
ResultSet rs = stmt.executeQuery();
Physician phs = null;
Related
This was reported by HibernateTools Reverse Engineering, but it seems to be true.
oracle jdbc driver reports no primary key columns on a table that has a primary key.
#Test
public void checkTable() throws SQLException, IOException {
System.out.println("in check table");
assertNotNull(conn);
Statement s = conn.createStatement();
ResultSet rset = s.executeQuery("select user from dual");
rset.next();
String username = rset.getString(1);
rset.close();
try {
s.execute("drop table " + username + ".x");
} catch (Exception e) {
// nothing it might not exist
}
s.execute("create table " + username + ".x (y number)");
s.execute("alter table x add constraint x_pk primary key (y)");
DatabaseMetaData meta = conn.getMetaData();
final String[] tableTypes = new String[] { "TABLE", "VIEW" };
ResultSet rs = meta.getTables(null, username, "X",tableTypes);
rs.next();
String table = rs.getString("table_name");
System.out.println("table is " + table);
rs.close();
rs = s.executeQuery("select * from user_constraints where table_name = 'X'");
rs.next();
String type = rs.getString("constraint_type");
assertEquals("P",type); // primary key
rs.close();
rs = meta.getPrimaryKeys(null, username, "X");
rs.next();
logger.info("getting pk");
System.out.print("wtf");
int colCount = 0;
while (rs.next()) {
final String pkName = rs.getString("pk_name");
logger.info("pkName: {}", pkName);
int keySeq = rs.getShort("key_seq"); // TODO should probably be column seq
String columnName = rs.getString("column_name");
logger.warn("seq: {}, columnName: {}, keySeq, columnName");
colCount++;
}
System.out.println("colCount: " + colCount);
assertEquals(1,colCount);
}
sql3 = "select avg(eff),min(eff),max(eff) from(select ("+baseParam+"/"+denom+"))as eff from ras)as s"; This is query whose output i want.
When i execute the code i get the error stating check your mysql version for syntax. I am using string to store the name of columns. I want to find the efficienccy with respect to 2000 Job_Render i.e. efficiency for each job_render. But what i get is total efficiency of all job_render. when i use the sql syntax with their direct column names. I have commented that query too for the reference. I want to find efficiency of each job render with respect to their 2000 JOBID. Bottom line is i want to find efficiency of 2000 JOBID each whose formula is Job_Render/LC_Final+LC_Preview. I have stored Job_Render in String baseParam and sum of both LC in String Denom. Please help me out.
public class Efficiency {
static final String DB_DRIVER = "com.mysql.jdbc.Driver";
static final String DB_CONNECTION = "jdbc:mysql://localhost:3306/";
static final String DB_USER = "root";
static final String DB_PASSWORD = "root";
static final String dbName = "raas";
public static void main(String[] args) {
try{
effFunc();
}
catch (Exception q){
q.getMessage();
}
}
static void effFunc() throws ClassNotFoundException,SQLException{
Connection conn = null;
// STEP 2: Register JDBC driver
Class.forName(DB_DRIVER);
// STEP 3: Open a connection
System.out.println("Connecting to a selected database...");
conn = DriverManager.getConnection(DB_CONNECTION + dbName, DB_USER,
DB_PASSWORD);
System.out.println("Connected database successfully...");
String baseParam;
//String[] subParam ;
baseParam= "Job_Render";
String sql3="";
String denom="";
final String[] COL={ "LC_Final","LC_Preview"};
denom = "(" + COL[0] + "+" + COL[1] + ")";
Statement stmt = null;
stmt = conn.createStatement();
// sql3 = "select 'Efficiency' Field,avg(eff),min(eff),max(eff) from(select (Job_Render/(LC_Final+LC_Preview))as eff from ras)as s";
sql3 = "select avg(eff),min(eff),max(eff) from(select ("+baseParam+"/"+denom+"))as eff from ras)as s";
System.out.println(sql3);
//
try{
ResultSet res = stmt.executeQuery(sql3);
//System.out.println(res);
while(res.next()){
// String JobID = res.getString("JobID");
// System.out.println("Job ID : " + JobID);
String col1 = res.getString(1);
System.out.println(col1);
double avg = res.getDouble(2);
System.out.println("Average of eff is:"+avg);
double min = res.getDouble(3);
System.out.println("Min of eff is:"+min);
double max = res.getDouble(4);
System.out.println("Max of eff is:"+max);
}}
catch(Exception e){
e.getStackTrace();
System.out.println(e.getMessage());
}
}}
Your code runs the query sql1 which is the empty string,
String sql1="";
// sql1 = "select * from raas.jobs";
ResultSet res = stmt.executeQuery(sql1); // sql1 = ""
should be
ResultSet res = stmt.executeQuery(sql3);
Edit
Then to get the value(s)
String col1 = res.getString(1);
double avg = res.getDouble(2);
double min = res.getDouble(3);
double max = res.getDouble(4);
I´m trying to use dapper with Oracle (ODP.NET) and I would like to use the "QueryMultiple" functionality.
Passing this string to the QueryMultiple method:
var query = "Select CUST_ID CustId from Customer_info WHERE CUST_ID=:custId;" +
"Select CUST_ID CustId from BCR WHERE CUST_ID=:custId";
I´m getting a ORA-00911: invalid character error
Is there any way to do this or it´s not possible?
Tks
The OP has probably long since solved the issue by now, but as of the time of writing, this question has only one answer and it doesn't really solve the problem of using Dapper's QueryMultiple() method with Oracle. As #Kamolas81 correctly states, by using the syntax from the official examples, one will indeed get the ORA-00933: SQL command not properly ended error message. I spent a while searching for some sort of documentation about how to do QueryMultiple() with Oracle, but I was surprised that there wasn't really one place that had an answer. I would have thought this to be a fairly common task. I thought that I'd post an answer here to save me :) someone some time in the future just in case anybody happens to have this same problem.
Dapper seems to just pass the SQL command straight along to ADO.NET and whatever db provider is executing the command. In the syntax from the examples, where each command is separated by a line break, SQL server will interpret that as multiple queries to run against the database and it will run each of the queries and return the results into separate outputs. I'm not an ADO.NET expert, so I might be messing up the terminology, but the end effect is that Dapper gets the multiple query outputs and then works its magic.
Oracle, though, doesn't recognize the multiple queries; it thinks that the SQL command is malformed and returns the ORA-00933 message. The solution is to use cursors and return the output in a DynamicParameters collection. For example, whereas the SQL Server version would look like this:
var sql =
#"
select * from Customers where CustomerId = #id
select * from Orders where CustomerId = #id
select * from Returns where CustomerId = #id";
the Oracle version of the query would need to look like this:
var sql = "BEGIN OPEN :rslt1 FOR SELECT * FROM customers WHERE customerid = :id; " +
"OPEN :rslt2 FOR SELECT * FROM orders WHERE customerid = :id; " +
"OPEN :rslt3 FOR SELECT * FROM returns Where customerid = :id; " +
"END;";
For queries run against SQL Server, Dapper can handle it from there. However, because we're returning the result sets into cursor parameters, we'll need to use an IDynamicParameters collection to specify parameters for the command. To add an extra wrinkle, the normal DynamicParameters.Add() method in Dapper uses a System.Data.DbType for the optional dbType parameter, but the cursor parameters for the query need to be of type Oracle.ManagedDataAccess.Client.OracleDbType.RefCursor. To solve this, I used the solution which #Daniel Smith proposed in this answer and created a custom implementation of the IDynamicParameters interface:
using Dapper;
using Oracle.ManagedDataAccess.Client;
using System.Data;
public class OracleDynamicParameters : SqlMapper.IDynamicParameters
{
private readonly DynamicParameters dynamicParameters = new DynamicParameters();
private readonly List<OracleParameter> oracleParameters = new List<OracleParameter>();
public void Add(string name, OracleDbType oracleDbType, ParameterDirection direction, object value = null, int? size = null)
{
OracleParameter oracleParameter;
if (size.HasValue)
{
oracleParameter = new OracleParameter(name, oracleDbType, size.Value, value, direction);
}
else
{
oracleParameter = new OracleParameter(name, oracleDbType, value, direction);
}
oracleParameters.Add(oracleParameter);
}
public void Add(string name, OracleDbType oracleDbType, ParameterDirection direction)
{
var oracleParameter = new OracleParameter(name, oracleDbType, direction);
oracleParameters.Add(oracleParameter);
}
public void AddParameters(IDbCommand command, SqlMapper.Identity identity)
{
((SqlMapper.IDynamicParameters)dynamicParameters).AddParameters(command, identity);
var oracleCommand = command as OracleCommand;
if (oracleCommand != null)
{
oracleCommand.Parameters.AddRange(oracleParameters.ToArray());
}
}
}
So all of the code together goes something like this:
using Dapper;
using Oracle.ManagedDataAccess.Client;
using System.Data;
int selectedId = 1;
var sql = "BEGIN OPEN :rslt1 FOR SELECT * FROM customers WHERE customerid = :id; " +
"OPEN :rslt2 FOR SELECT * FROM orders WHERE customerid = :id; " +
"OPEN :rslt3 FOR SELECT * FROM returns Where customerid = :id; " +
"END;";
OracleDynamicParameters dynParams = new OracleDynamicParameters();
dynParams.Add(":rslt1", OracleDbType.RefCursor, ParameterDirection.Output);
dynParams.Add(":rslt2", OracleDbType.RefCursor, ParameterDirection.Output);
dynParams.Add(":rslt3", OracleDbType.RefCursor, ParameterDirection.Output);
dynParams.Add(":id", OracleDbType.Int32, ParameterDirection.Input, selectedId);
using (IDbConnection dbConn = new OracleConnection("<conn string here>"))
{
dbConn.Open();
var multi = dbConn.QueryMultiple(sql, param: dynParams);
var customer = multi.Read<Customer>().Single();
var orders = multi.Read<Order>().ToList();
var returns = multi.Read<Return>().ToList();
...
dbConn.Close();
}
Building on greyseal96's helpful answer, I created this implementation of IDynamicParameters:
public class OracleDynamicParameters : SqlMapper.IDynamicParameters
{
private readonly DynamicParameters dynamicParameters;
private readonly List<OracleParameter> oracleParameters = new List<OracleParameter>();
public OracleDynamicParameters(params string[] refCursorNames) {
dynamicParameters = new DynamicParameters();
AddRefCursorParameters(refCursorNames);
}
public OracleDynamicParameters(object template, params string[] refCursorNames) {
dynamicParameters = new DynamicParameters(template);
AddRefCursorParameters(refCursorNames);
}
private void AddRefCursorParameters(params string[] refCursorNames)
{
foreach (string refCursorName in refCursorNames)
{
var oracleParameter = new OracleParameter(refCursorName, OracleDbType.RefCursor, ParameterDirection.Output);
oracleParameters.Add(oracleParameter);
}
}
public void AddParameters(IDbCommand command, SqlMapper.Identity identity)
{
((SqlMapper.IDynamicParameters)dynamicParameters).AddParameters(command, identity);
var oracleCommand = command as OracleCommand;
if (oracleCommand != null)
{
oracleCommand.Parameters.AddRange(oracleParameters.ToArray());
}
}
}
Assuming the same query, it can be used so:
var queryParams = new { id };
string[] refCursorNames = { "rslt1", "rslt2", "rslt3" };
var dynParams = new OracleDynamicParameters(queryParams, refCursorNames);
...
var multi = dbConn.QueryMultiple(sql, param: dynParams);
I suspect this is two or three separate things:
Your first query should not have a semi-colon
There is no new-line character between the queries
The usage notes imply that the bind character is # not : (no idea if this depends on the RDBMS being used).
If you look at the Dapper Google Code page the example given for QueryMultiple() is:
var sql =
#"
select * from Customers where CustomerId = #id
select * from Orders where CustomerId = #id
select * from Returns where CustomerId = #id";
using (var multi = connection.QueryMultiple(sql, new {id=selectedId}))
{
var customer = multi.Read<Customer>().Single();
var orders = multi.Read<Order>().ToList();
var returns = multi.Read<Return>().ToList();
...
}
Remove the semi-colon; add a new line and if you still have issues change the bind character.
public ResultSet getAdCampaignDetailsbyName(ADCampaignDetails Obj,
Connection conn, ResultSet rs, PreparedStatement pstmt) throws SQLException {
String query = "select adCampaignName,adCampaignId from AdCampaignDetails";
query += " where 1=1 ";
if (Obj.getAdCamapignName() != null)
query += " and adCampaignName = ?";
if (Obj.userId != "")
query += " and userId = ?";
pstmt = conn.prepareStatement(query);
int i = 0;
if (Obj.getAdCamapignName() != null)
pstmt.setString(++i, Obj.getAdCamapignName());
if (Obj.userId != "")
pstmt.setString(++i, Obj.userId);
System.out.println(" Q : " + query);
rs = pstmt.executeQuery();
return rs;
}
I am new to Spring , in this above query, i have used two conditions , How to execute query with condition in Spring JDBC Framework?
You can use SimpleJDBCTemplate.
// SQL query
String query = "select adCampaignName,adCampaignId from AdCampaignDetails where 1=1";
// Map with parameter value
Map<String, Object> parameters = new HashMap<String, Object>();
if (adCampaignName!=null){
parameters.put("adCampaignName ", adCampaignName );
query += " AND adCampaignName = :adCampaignName";
}
if (userId!=null){
parameters.put("userId", 1);
query += " AND userId= :userId";
}
// Execute query using simpleJDBC Template
List<AdCampaignDetails> resultList = getSimpleJdbcTemplate().query(query, new customRowMapper(), parameters);
You can build the query string accordingly, just add coresponding entries in map.
Check this link for details.
I am inserting values in to Database from a Webform using ADO.NET, C#. DB I am using is Oracle Database. Values are not being inserted and the program gets struck at the cmd.ExecuteNonquery()
Here is my Code below, Please let me know If I am doing any mistake.. I am using some Static Methods will that be any problem ?..
public Boolean AddDivCo(Int32 UserNo,String ID, String Role, String DivName )
{
Boolean ret = false;
OracleCommand cmd = new OracleCommand();
OracleConnection conn = new OracleConnection();
int i = 0;
try
{
conn.ConnectionString = ConfigurationManager.ConnectionStrings["Conn_RIS"].ConnectionString;
conn.Open();
cmd.Connection = conn;
String mySQL = "INSERT INTO R4CAD_ADMIN (AdminUserNo, AdminID, AdminRole, AdminDivName)VALUES(:AdminUserNo,:AdminID,:AdminRole,:DivName)";
OracleParameter p1 = new OracleParameter("AdminUserNo", OracleType.Number);
p1.Value = UserNo;
cmd.Parameters.Add(p1);
OracleParameter p2 = new OracleParameter("AdminID", OracleType.VarChar);
p2.Value = ID;
cmd.Parameters.Add(p2);
OracleParameter p3 = new OracleParameter("AdminRole", OracleType.VarChar);
p3.Value = Role;
cmd.Parameters.Add(p3);
OracleParameter p4 = new OracleParameter("DivName", OracleType.VarChar);
p4.Value = DivName;
cmd.Parameters.Add(p4);
cmd.CommandText = mySQL;
i = cmd.ExecuteNonQuery();
if (i != 0)
{
ret = true;
}
else
{
ret = false;
}
}
catch (Exception err)
{
Console.WriteLine(err.Message.ToString());
}
finally
{
cmd.Dispose();
//cmd = null;
//conn = null;
conn.Close();
}
return ret;
}
Is there a primary key defined on this table? If so, then my guess is that you have another session that already has inserted a record with this key, but has not yet terminated the transaction with a commit or rollback. I don't see a commit as part of your code - I assume you're doing that somewhere else?
Execute your code above once more, and while it's hung run the following query from another session:
SELECT
(SELECT username FROM v$session WHERE sid=a.sid) blocker,
a.sid,
' is blocking ',
(SELECT username FROM v$session WHERE sid=b.sid) blockee,
b.sid
FROM v$lock a JOIN v$lock b ON (a.id1 = b.id1 AND a.id2 = b.id2)
WHERE a.block = 1
AND b.request > 0;
This should tell you if you're being blocked by another session and what the SID is of that session.