java reading csv file and inserting into database gives date value error.

[twonj...@gmail.com]

I am using a java program to read lines from csv and insert them into mysql database. Whenever i run my program i discovered i could not insert values into a date field insert mysql if the value comming from the file is null. However if i change the field to a varchar, it works fine. I want to maintain the field as a date field. Below is the snippet of my code.




queryString = "INSERT INTO account (MNE,DATE1,DATE2,LINK) values('"+data[0]+"','"+data[1]+"','"+data[2]+"','"+data[3]+"')";
stmt=conn.createStatement();
val = stmt.executeUpdate(queryString);

and below is the line to be written
TEE,29-11-12,,90681
BBB,29-11-12,,90681
CCC,29-11-12,,90681

below is the error message (i think it comes because the value for DATE2 is null).


712 [pool-1-thread-1] ERROR main.ProcessInboxFileTask - Failed to upload: C:\Users\Teejay\Documents\NetBeansProjects\NetBeans 6.9.1\TEEJAYD\all\GTUS.csv
com.mysql.jdbc.MysqlDataTruncation: Data truncation: Incorrect date value: '' for column 'DATE2' at row 1
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3591)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3525)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1986)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2140)

[Roedy Green]

On Thu, 21 Mar 2013 01:26:47 -0700 (PDT), twonj...@gmail.com wrote,
quoted or indirectly quoted someone who said :

>I am using a java program to read lines from csv and insert them into mysql=
> database.

there are so many different formats for dates.

I like to standardize on ISO format yyyy-mm-dd

Make sure you are feeding your SQL /JDBC dates in the form it wants
and that you have configured your SQL dates to match.

One time a long time ago I got so pissed with incompatible date
formats I stored them in integer days since 1970, which were simple
ints that could be confused by different SQL engines.

--
Roedy Green Canadian Mind Products http://mindprod.com
Every method you use to prevent or find bugs leaves a residue of subtler
bugs against which those methods are ineffectual.
~ Bruce Beizer Pesticide Paradox

[Lew]

On Thursday, March 21, 2013 1:26:47 AM UTC-7, twonj...@gmail.com wrote:
> I am using a java [sic] program to read lines from csv and insert them into mysql database.
> Whenever i [sic] run my program i discovered i could not insert values into a date field insert
> mysql [sic] if the value comming from the file is null. However if i change the field to a varchar,

> it works fine. I want to maintain the field as a date field. Below is the snippet of my code.
>
> queryString = "INSERT INTO account (MNE,DATE1,DATE2,LINK)
> values('"+data[0]+"','"+data[1]+"','"+data[2]+"','"+data[3]+"')";

This is a dangerous way to inject SQL values. Any mistake in the 'data[n]' values will
screw up the SQL, or worse, open a security hole.

> stmt=conn.createStatement();
> val = stmt.executeUpdate(queryString);
>
> and below is the line to be written
>
> TEE,29-11-12,,90681
> BBB,29-11-12,,90681
> CCC,29-11-12,,90681
>
> below is the error message (i think it comes because the value for DATE2 is null).

It is not NULL, which is a SQL keyword. Be precise.

Issue the equivalent SQL command through the command line. You will find that it fails
the same way.

A 'PreparedStatement' will serve you better, but meanwhile make sure that you put the
correct syntax into your SQL statement. I'm betting that '' is not a valid DATE value.

> 712 [pool-1-thread-1] ERROR main.ProcessInboxFileTask - Failed to upload: C:\Users\Teejay\Documents\NetBeansProjects\NetBeans 6.9.1\TEEJAYD\all\GTUS.csv
>
> com.mysql.jdbc.MysqlDataTruncation: Data truncation: Incorrect date value: '' for column 'DATE2' at row 1
> at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3591)
> at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3525)
> at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1986)
> at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2140)

--
Lew