Database Error

What This Error Means

This error occurs when the database is unable to generate a plan for a query because there is a mismatch between the deterministic and non-deterministic properties of an expression or index. In this case, a function-based index is being used with a subquery that is not deterministic.

Why It Happens

This error typically happens when there is a mismatch between the deterministic and non-deterministic properties of an expression or index, and the database is unable to generate a plan for the query. This can be due to various reasons such as using a function-based index with a non-deterministic subquery, or using a deterministic expression with a non-deterministic function.

How to Fix It

1. 1To fix this error, you need to ensure that the deterministic and non-deterministic properties of the expression or index match. You can do this by removing the function-based index, or by rewriting the subquery to be deterministic. Alternatively, you can also consider rewriting the query to avoid using the function-based index altogether.

Example Code Solution

CREATE INDEX idx_my_table_name ON my_table (FUNCTION(my_column));
SELECT * FROM my_table WHERE FUNCTION(my_column) > (SELECT FUNCTION(my_column) FROM my_table);

CREATE INDEX idx_my_table_name ON my_table (my_column);
SELECT * FROM my_table WHERE my_column > (SELECT my_column FROM my_table);