"Could not move file: The process cannot access the file because it is being used by another process." (works on retry)

[fdcastel]

The Excel extension successfully converts .parquet files to .xlsx only about 50% of the time, alternating between successful and failed attempts:

PS C:\> duckdb -box -c "INSTALL EXCEL; LOAD EXCEL; COPY (FROM read_parquet('/temp/input.parquet') LIMIT 50001) TO '/temp/output.xlsx' WITH (FORMAT xlsx, HEADER true);"
IO Error:
Could not move file: The process cannot access the file because it is being used by another process.

PS C:\> duckdb -box -c "INSTALL EXCEL; LOAD EXCEL; COPY (FROM read_parquet('/temp/input.parquet') LIMIT 50001) TO '/temp/output.xlsx' WITH (FORMAT xlsx, HEADER true);"
PS C:\> duckdb -box -c "INSTALL EXCEL; LOAD EXCEL; COPY (FROM read_parquet('/temp/input.parquet') LIMIT 50001) TO '/temp/output.xlsx' WITH (FORMAT xlsx, HEADER true);"
IO Error:
Could not move file: The process cannot access the file because it is being used by another process.

PS C:\> duckdb -box -c "INSTALL EXCEL; LOAD EXCEL; COPY (FROM read_parquet('/temp/input.parquet') LIMIT 50001) TO '/temp/output.xlsx' WITH (FORMAT xlsx, HEADER true);"
PS C:\> duckdb -box -c "INSTALL EXCEL; LOAD EXCEL; COPY (FROM read_parquet('/temp/input.parquet') LIMIT 50001) TO '/temp/output.xlsx' WITH (FORMAT xlsx, HEADER true);"
IO Error:
Could not move file: The process cannot access the file because it is being used by another process.

PS C:\> duckdb -box -c "INSTALL EXCEL; LOAD EXCEL; COPY (FROM read_parquet('/temp/input.parquet') LIMIT 50001) TO '/temp/output.xlsx' WITH (FORMAT xlsx, HEADER true);"
                       


PS C:\>duckdb --version
v1.3.1 (Ossivalis) 2063dda3e6

PS C:\>cmd /c ver
Microsoft Windows [Version 10.0.26100.4061]