- The problematic expression is
(needed_skill_id = needed_skill_id)
.
- The error occurs because
needed_skill_id
on the left side is expected to be a STRING, but the right side (presumably from your data) is an ARRAY<STRING>.
To resolve this, you’ll need to ensure that both sides of the equality comparison have compatible data types.
Here are some steps you can take:
-
Check Data Types:
- Inspect the data in your
needed_skill_id
column. Make sure it contains only single values (strings) rather than arrays.
- Verify that the
needed_skill_id
column in your dataframe
is also of type STRING.
-
Data Transformation:
- If the
needed_skill_id
column in your dataframe
is indeed an array, you might need to transform it to a single value (string) before performing the join.
- Consider using functions like
explode
or getItem
to extract individual elements from the array.
-
Debugging the Merge:
- The merge operation you’ve shown involves joining two tables (
current_link_df
and a Delta table) based on position_id
and needed_skill_id
.
- Double-check that the column names and data types match between the two tables.
- Ensure that the join condition is correctly specified.
-
Review the Schema:
- Examine the schema of both
current_link_df
and the Delta table. Confirm that the data types align.
Remember to thoroughly inspect your data and verify the data types to pinpoint the issue. If you encounter any specific issues during this process, feel free to provide additional context, and I’ll be happy to assist further! 😊