PostgreSQLERROR 42883
PostgreSQL: Function Does Not Exist
PostgreSQL raises this error when no function matches the given name and argument types. PostgreSQL overloads functions by argument type, so even if a function exists, wrong argument types cause this error.
Example Query
SELECT upper(42); -- upper() expects text, not integer
Common Causes
- 1Calling a function with arguments of the wrong type without casting
- 2Function defined in a schema not on the search_path
- 3Typo in the function name
How to Fix It
Cast arguments to the expected types: upper(42::text). Check the function signature with \df function_name in psql. Add the schema to search_path or qualify the call: schema.function_name().
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