'0000-00-00 00:00:00' can not be represent

问题:

I have a database table containing dates

 (`date` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00'). 

I'm using MySQL. From the program sometimes data is passed without the date to the database. So, the date value is auto assigned to 0000-00-00 00:00:00 when the table data is called with the date column it gives error

...'0000-00-00 00:00:00' can not be represented as java.sql.Timestamp.......

I tried to pass null value to the date when inserting data, but it gets assign to the current time.

Is there any way I can get the ResultSet without changing the table structure?

回答1:

You can use this JDBC URL directly in your data source configuration:

jdbc:mysql://yourserver:3306/yourdatabase?zeroDateTimeBehavior=convertToNull

回答2:

Whether or not the "date" '0000-00-00" is a valid "date" is irrelevant to the question. "Just change the database" is seldom a viable solution.

Facts:

• MySQL allows a date with the value of zeros.
• This "feature" enjoys widespread use with other languages.

So, if I "just change the database", thousands of lines of PHP code will break.

Java programmers need to accept the MySQL zero-date and they need to put a zero date back into the database, when other languages rely on this "feature".

A programmer connecting to MySQL needs to handle null and 0000-00-00 as well as valid dates. Changing 0000-00-00 to null is not a viable option, because then you can no longer determine if the date was expected to be 0000-00-00 for writing back to the database.

For 0000-00-00, I suggest checking the date value as a string, then changing it to ("y",1), or ("yyyy-MM-dd",0001-01-01), or into any invalid MySQL date (less than year 1000, iirc). MySQL has another "feature": low dates are automatically converted to 0000-00-00.

I realize my suggestion is a kludge. But so is MySQL's date handling. And two kludges don't make it right. The fact of the matter is, many programmers will have to handle MySQL zero-dates forever.

回答3:

Instead of using fake dates like 0000-00-00 00:00:00 or 0001-01-01 00:00:00 (the latter should be accepted as it is a valid date), change your database schema, to allow NULL values.

ALTER TABLE table_name MODIFY COLUMN date TIMESTAMP NULL

回答4:

Append the following statement to the JDBC-mysql protocol:

?zeroDateTimeBehavior=convertToNull&autoReconnect=true&characterEncoding=UTF-8&characterSetResults=UTF-8

for example:

jdbc:mysql://localhost/infra?zeroDateTimeBehavior=convertToNull&autoReconnect=true&characterEncoding=UTF-8&characterSetResults=UTF-8

回答5:

As an exteme turnaround, when you cannot do an alter to your date column or to update the values, or while these modifications take place, you can do a select using a case/when.

SELECT CASE ModificationDate WHEN '0000-00-00 00:00:00' THEN '1970-01-01 01:00:00' ELSE ModificationDate END AS ModificationDate FROM Project WHERE projectId=1;

回答6:

I wrestled with this problem and implemented the URL concatenation solution contributed by @Kushan in the accepted answer above. It worked in my local MySql instance. But when I deployed my Play/Scala app to Heroku it no longer would work. Heroku also concatenates several args to the DB URL that they provide users, and this solution, because of Heroku's use concatenation of "?" before their own set of args, will not work. However I found a different solution which seems to work equally well.

SET sql_mode = 'NO_ZERO_DATE';

I put this in my table descriptions and it solved the problem of '0000-00-00 00:00:00' can not be represented as java.sql.Timestamp

回答7:

you can try like This

ArrayList<String> dtlst = new ArrayList<String>();
String qry1 = "select dt_tracker from gs";

Statement prepst = conn.createStatement();
ResultSet rst = prepst.executeQuery(qry1);
while(rst.next())
{
    String dt = "";
    try
    {
        dt = rst.getDate("dt_tracker")+" "+rst.getTime("dt_tracker");
    }
    catch(Exception e)
    {
        dt = "0000-00-00 00:00:00";
    }

    dtlst.add(dt);
}

回答8:

There was no year 0000 and there is no month 00 or day 00. I suggest you try

0001-01-01 00:00:00

While a year 0 has been defined in some standards, it is more likely to be confusing than useful IMHO.

回答9:

just cast the field as char

Eg: cast(updatedate) as char as updatedate

回答10:

I know this is going to be a late answer, however here is the most correct answer.

In MySQL database, change your timestamp default value into CURRENT_TIMESTAMP. If you have old records with the fake value, you will have to manually fix them.

回答11:

You can remove the "not null" property from your column in mysql table if not necessary. when you remove "not null" property no need for "0000-00-00 00:00:00" conversion and problem is gone.

At least worked for me.

回答12:

I believe this is help full for who are getting this below Exception on to pumping data through logstash Error: logstash.inputs.jdbc - Exception when executing JDBC query {:exception=>#}

Answer:jdbc:mysql://localhost:3306/database_name?zeroDateTimeBehavior=convertToNull"

or if you are working with mysql