How to Handle '0000-00-00 00:00:00' DATETIME Values in JDBC?

Handling "0000-00-00 00:00:00" DATETIME Values in JDBC

When retrieving DATETIME values from a MySQL database using JDBC, you may encounter an exception if the value is set to the quasi-null value of "0000-00-00 00:00:00". This issue arises when attempting to retrieve the value as a string using resultset.getString("add_date"), even though the intention is to obtain a raw string.

Alternative Solution

A workaround for this issue is to use the following SQL query:

SELECT CAST(add_date AS CHAR) as add_date

This query casts the DATETIME value to a CHAR, ensuring that it is retrieved as a string. However, it is considered a less optimal solution because of its additional processing requirement.

JDBC URL Configuration

An alternative approach is to configure the JDBC URL directly in your datasource configuration:

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

By setting the zeroDateTimeBehavior property to convertToNull, you instruct the JDBC driver to convert the all-zero DATETIME values to NULL instead of throwing an exception.

Source and Additional Options

The official MySQL Manual provides more information about how to handle all-zero DATETIME values in Connector/J:

https://dev.mysql.com/doc/connector-j/8.0/en/connector-j-reference-configuration-properties.html#property_zeroDateTimeBehavior

According to the manual, Connector/J versions 3.0.x converted all-zero DATETIME values to NULL by default. However, in version 3.1, the default behavior was changed to throwing an exception. The zeroDateTimeBehavior property allows you to customize this behavior by specifying one of the following options:

• exception (default): Throw an exception with SQLState S1009.
• convertToNull: Convert the value to NULL.
• round: Round the date to the nearest closest value, which is 0001-01-01.

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