[I] [Bug] ArrowFormatCWriter will raise java.lang.IllegalArgumentException while writing arrow format with empty schema [paimon]

["jichen20210919 (via GitHub)" <gi...@apache.org>]

jichen20210919 opened a new issue, #6452:
URL: https://github.com/apache/paimon/issues/6452

   ### Search before asking
   
   - [x] I searched in the [issues](https://github.com/apache/paimon/issues) and found nothing similar.
   
   
   ### Paimon version
   
   When we write rows to arrow format with empty paimon schema,following exception will raise
   `java.lang.IllegalArgumentException
   	at org.apache.arrow.util.Preconditions.checkArgument(Preconditions.java:122)
   	at org.apache.arrow.vector.VectorSchemaRoot.getVector(VectorSchemaRoot.java:185)
   	at org.apache.paimon.arrow.ArrowUtils.serializeToCStruct(ArrowUtils.java:224)
   	at org.apache.paimon.arrow.vector.ArrowFormatCWriter.toCStruct(ArrowFormatCWriter.java:72)
   	at org.apache.paimon.arrow.vector.ArrowFormatWriterTest.testArrowFormatCWriterWithEmptySchema(ArrowFormatWriterTest.java:292)
   	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
   	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)`
   
   ### Compute Engine
   
   JavaAPI
   
   ### Minimal reproduce step
   
           try (RootAllocator rootAllocator = new RootAllocator();
                   BufferAllocator allocator =
                           rootAllocator.newChildAllocator("paimonWriter", 0, Long.MAX_VALUE);
                   ArrowFormatCWriter writer =
                           new ArrowFormatCWriter(emptyschema, 4096, true, allocator)) {
               for (int i = 0; i < 100; i++) {
                   writer.write(GenericRow.of());
               }
               writer.flush();
               ArrowCStruct cStruct = writer.toCStruct();
               Assertions.assertThat(cStruct).isNotNull();
               writer.release();
           }
   
   ### What doesn't meet your expectations?
   
   It should work as normal.
   
   ### Anything else?
   
   _No response_
   
   ### Are you willing to submit a PR?
   
   - [ ] I'm willing to submit a PR!


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