ERROR: operator does not exist: character varying = integer

This error occurs when you try to compare a character varying (string) data type with an integer data type using the equality operator (=).

For example, if you have a table with a column named "name" of character varying data type and you try to compare it with an integer value using the equality operator:

SELECT * FROM my_table WHERE name = 123;

You will get the "operator does not exist: character varying = integer" error message because you cannot compare a string with an integer using the equality operator.

To fix this error, you need to make sure that you are comparing the same data types. If the value you are comparing with is an integer, you can convert the character varying value to an integer using the CAST function:

SELECT * FROM my_table WHERE CAST(name AS integer) = 123;

This will convert the "name" column to an integer before comparing it with the integer value 123.