ORA-06512: at line n error

The error ORA-06512: at line occurs as part of another exception stack that shows the line number where the exception occurred. The error is not the cause of the exception to this. This error is caused by a stack of unhandled exceptions in the PLSQL code. This error ORA-06512: at line shows the line number at which the error occurred.

If an error occurs in oracle, oracle will show all possible errors. Oracle will throw a little more than error. If the root cause of the error is fixed, all the error will be fixed. To resolve this error, the root cause of the error should be identified and fixed. There are two ways to fix it. The code bug has to be fixed or the exception has to be fixed to resolve this error ORA-06512: at line.

The ORA-06512: at line error will show the line number at which the error occurred. The root cause could be identified from the code on the line number. The root cause of the error may not appear on the specified line number. This error shows the line number at which the error occurred. The root cause of the error could be across the line number. To resolve this error, the root cause should be identified and fixed.



Problem

If you create a simple code that throws an error and you do not handle the exception, you can see this error. Create a simple PL/SQL code that makes an exception. The exception will create the trace of the error stack. This error will be included in the error stack trace. The error will show the number of the line the exception is thrown at.

If you run the example below, the error will be thrown. The empid variable is declared to be a numeric of size 4. In the execution block, a string is assigned to the empid variable. The string cannot be converted and assigned to a variable of the numeric data type.

declare
    empid numeric(4);
begin
    empid := 'A101';
end;


ORA-06512 Error

The actual error is ORA-06502: PL/SQL: numeric or value error: character to number conversion error. As a part of the ORA-06502 error, the ORA-06512: at line error is shown as a backtrace message as the error stack is being unwound by unhandled exceptions.

In the stack trace of below error, the actual error ORA-06502 is shown as the first line. The ORA-06512 error is shown as the stack trace. This error shows line number 4. The error is thrown at the line number 4. The error can be fixed by analysing the code at the line number where the error is thrown.

declare
    empid numeric(4);
begin
    empid := 'A101';
end;
Error report -
ORA-06502: PL/SQL: numeric or value error: character to number conversion error
ORA-06512: at line 4
06502. 00000 -  "PL/SQL: numeric or value error%s"


Cause

An arithmetic, numeric, string, conversion, or constraint error occurred. For example, this error occurs if an attempt is made to assign the value NULL to a variable declared NOT NULL, or if an attempt is made to assign an integer larger than 99 to a variable declared NUMBER(2).

The ORA-06512: at line error is shown as a backtrace message as the error stack is being unwound by unhandled exceptions. The actual error will be shown along with this error in the stack trace.



Action

Change the data, how it is manipulated, or how it is declared so that values do not violate constraints.

The error stack trace will show the actual oracle error. The debug should start for the line number at which the error is occurred. The line number will be shown in this error. The root cause of the error should be identified and corrected in the code.



Solution 1

There is no solution to this exception. This error is thrown back as a trace of the error message. The root cause of the error will be shown along with the error. The root cause of the error should be identified and corrected. The error shows the line number at which the exception occurred. The root cause of the error may not be in the line where the exception occurred.

In the example below, if the actual error is ORA-06502: PL/SQL: numeric or value error: character to number conversion error is fixed in the code, the error ORA-06512: at line will also resolved. Error is the assignment of a string value to the numeric data type variable. If the variable data type is changed to varchar, the value of the string will be assigned to the variable.

declare
    empid varchar(4);
begin
    empid := 'A101';
end;

Output

PL/SQL procedure successfully completed.


Solution 2

The other option is to handle the exception using the exception handling method. When the actual error is thrown in the code, the exception block will be executed and take an alternative path. The exception will be avoided in the runtime.

This error is due to the data passed through the application. If this error is not a common occurrence, changing the data type will lead to a number of code changes. Instead of fixing the code to handle the value of the character string to be saved in the numeric data type, the exception is best handled.

declare
    empid numeric(4);
begin
    empid := 'A101';
exception
    WHEN OTHERS THEN
        empid :=0;
end;

Output

PL/SQL procedure successfully completed.



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