I am trying to query a table that has long-raw() type data which is having a text in it. I need to export this data to a flat file. For a given id, I see there are 14 rows in the table. I am fetching the data using JDBC connection and when fetching the data using ResultSet, I am getting ArrayIndexOutOfBoundsException at 13th row. Not sure why this issue occurs.
The data in the long raw column could be large. I am suspecting it is not able to fetch all the data that is present. I might be wrong too. I cant find much information when could a ArrayIndexOutOfBoundsException occur in this scenario. Complete code is below-
import java.io.*;
import java.sql.*;
import java.util.ArrayList;
public class TestMain {
private static String URL = "jdbc:oracle:thin:@localhost:8080:xe";
private static String USER_NAME = "scott";
private static String PASSWORD = "tiger";
public static void main(String[] args) throws SQLException, IOException {
Connection newConnection = getNewConnection();
BufferedWriter bw = new BufferedWriter(new FileWriter("./extractedFile/RawDataFile.txt"));
PreparedStatement extractableRowCount = getExtractableRowCount(newConnection, (long)34212);
ResultSet foundCountRs = extractableRowCount.executeQuery();
foundCountRs.next();
int foundCount = foundCountRs.getInt(1);
//`here I get 14 as the count`
System.out.println("Available rows for id:: 34212 are "+foundCount);
foundCountRs.close();
extractableRowCount.close();
PreparedStatement fetchBinaryQueryStatement = getExtractableRow(newConnection, (long)34212);
ResultSet fetchedRowsRs = fetchBinaryQueryStatement.executeQuery();
int i=0;
while (fetchedRowsRs.next()) {
i++;
//`I see outputs upto i=13, and then I get ArrayIndexOutOfBoundsException
System.out.println("i = " + i);
String userName = fetchedRowsRs.getString("user_name");
InputStream savedTextData = fetchedRowsRs.getBinaryStream("saved_text");
bw.write(userName + ":: ");
int len = 0;
if (savedTextData != null) {
while ((len = savedTextData.read()) != -1) {
bw.write((char) len);
bw.flush();
}
}
fetchedRowsRs.close();
fetchBinaryQueryStatement.close();
}
bw.close();
}
public static Connection getNewConnection() throws SQLException {
DriverManager.registerDriver(new oracle.jdbc.OracleDriver());
return DriverManager.getConnection(URL, USER_NAME, PASSWORD);
}
public static PreparedStatement getExtractableRow(Connection connection, Long id) throws SQLException {
PreparedStatement statement = connection.prepareStatement("SELECT user_name, saved_text FROM user_email_text_data where id = ?");
statement.setLong(1, id);
return statement;
}
public static PreparedStatement getExtractableRowCount(Connection connection, Long id) throws SQLException {
PreparedStatement statement = connection.prepareStatement("SELECT count(1) FROM user_email_text_data where id = ?");
statement.setLong(1, id);
return statement;
}
}
Full stack trace of error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 8
at oracle.jdbc.driver.T4CMAREngineNIO.buffer2Value(T4CMAREngineNIO.java:814)
at oracle.jdbc.driver.T4CMAREngineNIO.unmarshalUB2(T4CMAREngineNIO.java:577)
at oracle.jdbc.driver.T4CMAREngineNIO.unmarshalSB2(T4CMAREngineNIO.java:557)
at oracle.jdbc.driver.T4CMAREngine.processIndicator(T4CMAREngine.java:1573)
at oracle.jdbc.driver.T4CMarshaller$StreamMarshaller.unmarshalOneRow(T4CMarshaller.java:179)
at oracle.jdbc.driver.T4CLongRawAccessor.unmarshalOneRow(T4CLongRawAccessor.java:159)
at oracle.jdbc.driver.T4CTTIrxd.unmarshal(T4CTTIrxd.java:1526)
at oracle.jdbc.driver.T4CTTIrxd.unmarshal(T4CTTIrxd.java:1289)
at oracle.jdbc.driver.T4C8Oall.readRXD(T4C8Oall.java:850)
at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:543)
at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:252)
at oracle.jdbc.driver.T4C8Oall.doOALL(T4C8Oall.java:612)
at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:226)
at oracle.jdbc.driver.T4CPreparedStatement.fetch(T4CPreparedStatement.java:1023)
at oracle.jdbc.driver.OracleStatement.fetchMoreRows(OracleStatement.java:3353)
at oracle.jdbc.driver.InsensitiveScrollableResultSet.fetchMoreRows(InsensitiveScrollableResultSet.java:736)
at oracle.jdbc.driver.InsensitiveScrollableResultSet.absoluteInternal(InsensitiveScrollableResultSet.java:692)
at oracle.jdbc.driver.InsensitiveScrollableResultSet.next(InsensitiveScrollableResultSet.java:406)
