"ERROR: operator does not exist: character varying = integer

This error occurs when you try to compare a string (character varying) with an integer using the equal (=) operator. It means that the two data types are not compatible for comparison.

For example, let's say you have a table with a column named "age" of type integer, and you want to filter the results to only show records where the age is equal to a certain value. If you mistakenly write the query like this:

SELECT * FROM my_table WHERE age = '25';

You will get the "ERROR: operator does not exist: character varying = integer" error because you are trying to compare an integer column with a string value ('25').

To fix this error, make sure that you are comparing values of the same data type. In the above example, you should use an integer value instead of a string value:

SELECT * FROM my_table WHERE age = 25;