vibhatha commented on code in PR #43482:
URL: https://github.com/apache/arrow/pull/43482#discussion_r1698338790
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java/dataset/src/test/java/org/apache/arrow/dataset/TestFragmentScanOptions.java:
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@@ -165,4 +169,152 @@ public void testCsvConvertOptionsNoOption() throws
Exception {
assertEquals(3, rowCount);
}
}
+
+ @Test
+ public void testCsvReadParseAndReadOptions() throws Exception {
+ final Schema schema =
+ new Schema(
+ Collections.singletonList(Field.nullable("Id;Name;Language", new
ArrowType.Utf8())),
+ null);
+ String path = "file://" + getClass().getResource("/").getPath() +
"/data/student.csv";
+ BufferAllocator allocator = new RootAllocator(Long.MAX_VALUE);
+ CsvFragmentScanOptions fragmentScanOptions =
+ new CsvFragmentScanOptions(
+ new CsvConvertOptions(ImmutableMap.of()),
+ ImmutableMap.of("skip_rows", "1"),
+ ImmutableMap.of("delimiter", ";"));
+ ScanOptions options =
+ new ScanOptions.Builder(/*batchSize*/ 32768)
+ .columns(Optional.empty())
+ .fragmentScanOptions(fragmentScanOptions)
+ .build();
+ try (DatasetFactory datasetFactory =
+ new FileSystemDatasetFactory(
+ allocator, NativeMemoryPool.getDefault(), FileFormat.CSV,
path);
+ Dataset dataset = datasetFactory.finish();
+ Scanner scanner = dataset.newScan(options);
+ ArrowReader reader = scanner.scanBatches()) {
+
+ assertEquals(schema.getFields(),
reader.getVectorSchemaRoot().getSchema().getFields());
+ int rowCount = 0;
+ while (reader.loadNextBatch()) {
+ final ValueIterableVector<String> idVector =
+ (ValueIterableVector<String>)
+ reader.getVectorSchemaRoot().getVector("Id;Name;Language");
+ assertThat(
+ idVector.getValueIterable(),
+ IsIterableContainingInOrder.contains("2;Peter;Python\n" +
"3;Celin;C++"));
+ rowCount += reader.getVectorSchemaRoot().getRowCount();
+ }
+ assertEquals(2, rowCount);
+ }
+ }
+
+ @Test
+ public void testCsvReadOtherOptions() throws Exception {
Review Comment:
Thanks for adding this.
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