Error number: 3998; Symbol: ER_INVALID_CAST; SQLSTATE: HY000
Message: Cannot cast value to %s.
Error Number 3998 – ER_INVALID_CAST
SQLSTATE: HY000
Error Description:
MySQL error ER_INVALID_CAST occurs when a CAST operation fails due to an invalid type. It indicates that the operation attempted to convert data from one data type to another, but the target data type is incompatible with the data that is being attempted to be converted.
Common Cases:
This error can occur in a variety of circumstances. In most cases, it is due to one of the following:
• Trying to convert a data type that does not support casting, such as a string to an integer.
• Trying to convert a float to an integer, where the decimal part of the float cannot be represented as an integer.
• Trying to convert a string to another type, where the string does not represent a valid value of the target type.
Resolution:
In order to resolve this error, it is important to ensure that the types being operated on are valid. If a data type does not support casting, it is important to use a compatible type to perform the conversion. It is also important to ensure that any strings being converted have a valid value of the target data type, or that floats being converted to integers do not contain a decimal part.