fix wrong error variable used (#4206)

go/libraries/doltcore/table/typed/parquet/reader.go

@@ -74,7 +74,7 @@ func NewParquetReader(vrw types.ValueReadWriter, fr source.ParquetFile, sche sch
 	for _, col := range columns {
 		colData, _, _, cErr := pr.ReadColumnByPath(common.ReformPathStr(fmt.Sprintf("parquet_go_root.%s", col.Name)), num)
 		if cErr != nil {
-			return nil, err
+			return nil, fmt.Errorf("cannot read column: %s", cErr.Error())
 		}
 		data[col.Name] = colData
 		colName = append(colName, col.Name)

integration-tests/bats/import-update-tables.bats

@@ -445,6 +445,14 @@ DELIM
     [[ "$output" = "" ]] || false
 }
 
+@test "import-update-tables: bad parquet file import errors" {
+    dolt sql -q "CREATE TABLE test_table (pk int primary key, col1 text, col2 int);"
+    echo "This is a bad parquet file" > bad.parquet
+    run dolt table import -u test_table bad.parquet
+    [ "$status" -eq 1 ]
+    [[ "$output" =~ "When attempting to move data from parquet file:bad.parquet to test_table, could not open a reader." ]] || false
+}
+
 @test "import-update-tables: Subsequent updates with --continue correctly work" {
    dolt sql -q "create table t (pk int primary key, val varchar(1))"
    cat <<DELIM > file1.csv