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Thread: MySQL Syntax Error

  1. #1
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    Default MySQL Syntax Error

    I am trying to pull a .csv file from the web that contains some stock data. I am then trying to write this data to a MySql database. Half of the data is being input into the preparedStatement, but I then when I get to 'open' it will only accept a single character. I tried substituting the String for just plain text but it still will only accept a single character. This is my code:

    import java.io.BufferedReader;
    import java.io.IOException;
    import java.io.InputStreamReader;
    import java.net.MalformedURLException;
    import java.net.URL;
    import java.net.URLConnection;
    import java.sql.Connection;
    import java.sql.DriverManager;
    import java.sql.PreparedStatement;
    import java.sql.SQLException;
    import java.util.StringTokenizer;
     
     
    public class YahooStock {
     
    	private String ticker;
     
    	public YahooStock(String inTicker) {
    		ticker = inTicker;
    	}
     
    	private String retrieveQuote() {
    		StringBuffer buf = new StringBuffer();
    		try {
    			URL page = new URL("http://quote.yahoo.com/d/quotes.csv?s=" + ticker + "&f=sl1d1t1c1ohgv&e=.csv");
    			String line;
    			URLConnection conn = page.openConnection();
    			conn.connect();
    			InputStreamReader in = new InputStreamReader(conn.getInputStream());
    			BufferedReader data = new BufferedReader(in);
    			while ((line = data.readLine()) != null) {
    				buf.append(line + "\n");
    			}
    		} catch (MalformedURLException urle) {
    			System.out.println("Bad URL: " + urle.toString());
    		} catch (IOException ioe) {
    			System.out.println("Error: " + ioe.toString());
    		}
    		return buf.toString();
    	}
     
    	private void storeQuote(String data) {
    		StringTokenizer tokens = new StringTokenizer(data, ",");
    		String[] fields = new String[9];
    		for (int i = 0; i < fields.length; i++) {
    			fields[i] = stripQuotes(tokens.nextToken());
    		}
    		try {
    			Class.forName("com.mysql.jdbc.Driver");
    			Connection conn = DriverManager.getConnection("jdbc:mysql://XXXX.X.X.XX:3306/QuoteData", "xxx", "xxx");
    			PreparedStatement prep2 = conn.prepareStatement("INSERT INTO yahoo(ticker, price, quoteDate, change, open, high, low, volume) VALUES(?,?,?,?,?,?,?,?)");
    			prep2.setString(1, fields[0]);
    			prep2.setString(2, fields[1]);
    			prep2.setString(3, fields[2]);
    			prep2.setString(4, fields[3]);
    			prep2.setString(5, fields[4]);
    			prep2.setString(6, fields[5]);
    			prep2.setString(7, fields[6]);
    			prep2.setString(8, fields[7]);
    			prep2.executeUpdate();
    			conn.close();
    		} catch (SQLException sqle) {
    			System.out.println("SQL Error: " + sqle.toString());
    		} catch (ClassNotFoundException cnfe) {
    			System.out.println("Error: " + cnfe.toString());
    		}
    	}
     
    	private String stripQuotes(String nextToken) {
    		StringBuffer output = new StringBuffer();
    		for (int i = 0; i < nextToken.length(); i++) {
    			if (nextToken.charAt(i) != '\"') {
    				output.append(nextToken.charAt(i));
    			}
    		}
    		return output.toString();
    	}
     
    	public static void main(String[] args) {
    		if (args.length != 1) {
    			System.out.println("Usage: java YahooStock tickerSymbol");
    			System.exit(1);
    		}
    		YahooStock ys = new YahooStock(args[0]);
    		String data = ys.retrieveQuote();
    		ys.storeQuote(data);
    	}
     
    }

    The csv file that im pulling contains this:

    "AMZN",188.39,"11/29/2011","4:00pm",-5.76,195.13,195.50,187.30,6565622

    And the error I'm getting is:

    SQL Error: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorEx ception: 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 'change, open, high, low, volume) VALUES('AMZN','188.39','11/29/2011','4:00pm','-' at line 1



  2. #2
    Administrator copeg's Avatar
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    Default Re: MySQL Syntax Error

    What is the database schema. Are all of the columns string values?

  3. #3
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    Default Re: MySQL Syntax Error

    Yes they are all set to:
    Type: VARCHAR
    Collation: utf8_general
    and I set the to a length of 60.

    I tried changing one to INT and then using Integer.parseInt(fields[4]) but that didn't seem to help either.
    I've attached an screen shot of phpMyAdmin
    Picture 1.jpg

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    Default Re: MySQL Syntax Error

    Interestingly I have noticed that its the number of characters that seems to be causing the truncation. The command only seems to be able to handle 27 characters. Is this a parameter that is set somewhere?

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    Default Re: MySQL Syntax Error

    Has anybody else ever had a problem like this? I've searched high and low but can't find an answer...

  6. #6
    Administrator copeg's Avatar
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    Default Re: MySQL Syntax Error

    Add a println statement in there to define what exactly is the SQL update query that is being used - the exception shows there is an error which doesn't seem obvious to me. And I don't have a clue what you mean in your original post by 'open' and 'accept single character'

  7. #7
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    Default Re: MySQL Syntax Error

    Sorry I have just read back the original post, it was late!!! I tried debuging the code or about 4 hours last night with no success other than working out that I could only write a maximum of 54 bytes before the error occured. Switched off the computer... came back today and it all works beautifully!!!

    Thanks anyway copeg.

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