minor: validate config minimum_parallel_output_files when setting it (#23596)

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- Part of #17498

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This is logically the same change as #23592, but for another
configuration.

This value represents number of concurrent writer, and 0 is a invalid
value. So validate it must be non-zero

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Author: 2010YOUY01

datafusion/common/src/config.rs

@@ -867,7 +867,7 @@ config_namespace! {
         /// RecordBatches will be distributed in round robin fashion to each
         /// parallel writer. Each writer is closed and a new file opened once
         /// soft_max_rows_per_output_file is reached.
-        pub minimum_parallel_output_files: usize, default = 4
+        pub minimum_parallel_output_files: ConfigNonZeroUsize, default = non_zero_usize_default(4)
 
         /// Target number of rows in output files when writing multiple.
         /// This is a soft max, so it can be exceeded slightly. There also

datafusion/datasource/src/write/demux.rs

@@ -155,7 +155,7 @@ async fn row_count_demuxer(
 
     let max_rows_per_file = exec_options.soft_max_rows_per_output_file.get();
     let max_buffered_batches = exec_options.max_buffered_batches_per_output_file;
-    let minimum_parallel_files = exec_options.minimum_parallel_output_files;
+    let minimum_parallel_files = exec_options.minimum_parallel_output_files.get();
     let mut part_idx = 0;
     let write_id = rand::distr::Alphanumeric.sample_string(&mut rand::rng(), 16);
 

datafusion/sqllogictest/test_files/set_variable.slt

@@ -724,6 +724,9 @@ SET datafusion.runtime.list_files_cache_ttl = '1m18446744073709551556s'
 statement error DataFusion error: Invalid or Unsupported Configuration: value must be greater than 0
 SET datafusion.execution.batch_size = 0
 
+statement error DataFusion error: Invalid or Unsupported Configuration: value must be greater than 0
+SET datafusion.execution.minimum_parallel_output_files = 0
+
 statement error DataFusion error: Invalid or Unsupported Configuration: value must be greater than 0
 SET datafusion.execution.soft_max_rows_per_output_file = 0