PARQUET-428: Support INT96 and FIXED_LEN_BYTE_ARRAY types

[majetideepak]

This PR adds support for INT96 and FIXED_LEN_BYTE_ARRAY types.
It modifies the examples and DebugPrint to handle these types.

[majetideepak]

The first check passed on Travis CI https://travis-ci.org/apache/parquet-cpp/builds/105457807

[wesm]

How about dictionary encoding (see the BYTE_ARRAY specialization there)? It's hard to verify that it works without tests, though, we should try to address that soon.

[majetideepak]

I will add that now. Actually its rare for these types to be dictionary encoded.
I tested this on my side and it seems to work okay. We should definitely add tests after PARQUET-435

[wesm]

Can you create src/parquet/types-test.cc and add a unit test asserting ASSERT_EQ(12, sizeof(Int96))? We can add more unit tests relating to types as we go.

[majetideepak]

The macro STRUCT_END(Int96, 12) includes a static assert. I checked that this works locally.
Do you still want to add a test ?

[wesm]

Ah good point, thanks. I think it's fine to omit the test, then. We should eventually move parquet_type_to_string to types.h and add tests that verify the type names (and other properties and utilities we add).

[julienledem]

Is this one good to go?
@wesm @majetideepak

[majetideepak]

Rebased and good to go from my side.

[wesm]

lgtm +1. @asandryh will need to fix up minor conflicts #29

[Syed-SnapLogic]

I am using java hadoop and parquet library. My parquet schema is:
message myschema {
optional fixed_len_byte_array(5) decimal_field (DECIMAL(10,6));
}

And my value is of type BigDecimal. And I am writing to parquet file as follows:

value = value.toString();
// recordConsumer is an instance of org.apache.parquet.io.api.RecordConsumer
recordConsumer.addBinary(Binary.fromString((String) value));

I am getting exception:

java.lang.IllegalArgumentException: Fixed Binary size 11 does not match field type length 5

Any ideas how to resolve it?

[wesm]

You're in the wrong place -- this is the original repo for the Parquet C++ project