Fix COPY TO does not produce an output file for the empty set (improved test to validate schema is correct)

Bert Vermeiren · Bert Vermeiren · commit 18fbd636d0d4 · 2025-10-16T14:10:00.000+02:00
diff --git a/datafusion/sqllogictest/test_files/copy.slt b/datafusion/sqllogictest/test_files/copy.slt
@@ -437,7 +437,7 @@ CREATE EXTERNAL TABLE validate_parquet_single_no_rows STORED AS PARQUET LOCATION
 
 # validate the parquet file contains 0 rows.
 query I
-SELECT COUNT(*) FROM validate_parquet_single_no_rows;
+SELECT count(id) FROM validate_parquet_single_no_rows;
 ----
 0
 

Original file line number	Diff line number	Diff line change
`@@ -437,7 +437,7 @@ CREATE EXTERNAL TABLE validate_parquet_single_no_rows STORED AS PARQUET LOCATION`
`437`	`437`
`438`	`438`	`# validate the parquet file contains 0 rows.`
`439`	`439`	`query I`
`440`		`-SELECT COUNT(*) FROM validate_parquet_single_no_rows;`
	`440`	`+SELECT count(id) FROM validate_parquet_single_no_rows;`
`441`	`441`	`----`
`442`	`442`	`0`
`443`	`443`