[jira] [Created] (ARROW-7517) [C++] Builder does not honour dictionary type provided during initialization

[Wamsi Viswanath (Jira)]

Wamsi Viswanath created ARROW-7517:
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 Summary: [C++] Builder does not honour dictionary type provided 
during initialization
 Key: ARROW-7517
 URL: https://issues.apache.org/jira/browse/ARROW-7517
 Project: Apache Arrow
  Issue Type: Bug
  Components: C++
Affects Versions: 0.15.0
Reporter: Wamsi Viswanath


Below is an example for reproducing the issue:

[https://gist.github.com/wamsiv/d48ec37a9a9b5f4d484de6ff86a3870d]

Builder automatically optimizes the dictionary type depending upon the number 
of unique values provided which results in schema mismatch.

 



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[jira] [Created] (ARROW-7512) Dictionary memo missing elements in id_to_dictionary_ map after deserialization

[Wamsi Viswanath (Jira)]

Wamsi Viswanath created ARROW-7512:
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 Summary: Dictionary memo missing elements in id_to_dictionary_ map 
after deserialization
 Key: ARROW-7512
 URL: https://issues.apache.org/jira/browse/ARROW-7512
 Project: Apache Arrow
  Issue Type: Bug
  Components: C++
Affects Versions: 0.15.0
Reporter: Wamsi Viswanath


`id_to_dictionary_` map is empty after de-serialization of schema using 
ReadSchema method.

An example for reproduction:

[https://gist.github.com/wamsiv/77dc1db44b5805828172e6c94d61d2d9]

I see that it is probably being missed here: 
https://github.com/apache/arrow/blob/master/cpp/src/arrow/ipc/metadata_internal.cc#L804

Please let me know if the behavior is expected and if so then how the client is 
expected to have dictionary array values?



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[jira] [Created] (ARROW-6470) Segmentation fault when trying to serialzie empty SerializeRecordBatch

[Wamsi Viswanath (Jira)]

Wamsi Viswanath created ARROW-6470:
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 Summary: Segmentation fault when trying to serialzie empty 
SerializeRecordBatch 
 Key: ARROW-6470
 URL: https://issues.apache.org/jira/browse/ARROW-6470
 Project: Apache Arrow
  Issue Type: Bug
  Components: C++
Affects Versions: 0.13.0
Reporter: Wamsi Viswanath


Below is a simple reproducible example, please let me know if the behavior is 
valid:

 
{color:#ffa759}int{color} {color:#ffd580}main{color}{color:#cbccc6}(){color} 
{color:#cbccc6}{{color}
{color:#73d0ff}std{color}{color:#cbccc6}::{color}{color:#cbccc6}shared_ptr{color}{color:#f29e74}<{color}{color:#73d0ff}arrow{color}{color:#cbccc6}::{color}{color:#cbccc6}Schema{color}{color:#f29e74}>{color}{color:#cbccc6}
 schema {color}{color:#f29e74}={color}
{color:#73d0ff}arrow{color}{color:#cbccc6}::{color}{color:#ffd580}schema{color}{color:#cbccc6}({{color}{color:#73d0ff}arrow{color}{color:#cbccc6}::{color}{color:#ffd580}field{color}{color:#cbccc6}({color}{color:#bae67e}"int_"{color}{color:#cbccc6},{color}
 
{color:#73d0ff}arrow{color}{color:#cbccc6}::{color}{color:#ffd580}int32{color}{color:#cbccc6}(){color}{color:#cbccc6},{color}
 {color:#ffcc66}false{color}{color:#cbccc6})}){color}{color:#cbccc6};{color}
{color:#73d0ff}std{color}{color:#cbccc6}::{color}{color:#cbccc6}vector{color}{color:#f29e74}<{color}{color:#73d0ff}std{color}{color:#cbccc6}::{color}{color:#cbccc6}shared_ptr{color}{color:#f29e74}<{color}{color:#73d0ff}arrow{color}{color:#cbccc6}::{color}{color:#cbccc6}Array{color}{color:#f29e74}>>{color}{color:#cbccc6}
 arrays {color}{color:#f29e74}={color} 
{color:#cbccc6}{}{color}{color:#cbccc6};{color}

{color:#73d0ff}std{color}{color:#cbccc6}::{color}{color:#cbccc6}shared_ptr{color}{color:#f29e74}<{color}{color:#73d0ff}arrow{color}{color:#cbccc6}::{color}{color:#cbccc6}RecordBatch{color}{color:#f29e74}>{color}{color:#cbccc6}
 record_batch {color}{color:#f29e74}={color}
{color:#73d0ff}arrow{color}{color:#cbccc6}::{color}{color:#73d0ff}RecordBatch{color}{color:#cbccc6}::{color}{color:#ffd580}Make{color}{color:#cbccc6}({color}{color:#cbccc6}schema{color}{color:#cbccc6},{color}
 
{color:#cbccc6}arrays{color}{color:#cbccc6}[{color}{color:#ffcc66}0{color}{color:#cbccc6}]{color}{color:#cbccc6}->{color}{color:#ffd580}length{color}{color:#cbccc6}(){color}{color:#cbccc6},{color}{color:#cbccc6}
 arrays{color}{color:#cbccc6}){color}{color:#cbccc6};{color}
{color:#73d0ff}std{color}{color:#cbccc6}::{color}{color:#cbccc6}shared_ptr{color}{color:#f29e74}<{color}{color:#73d0ff}arrow{color}{color:#cbccc6}::{color}{color:#cbccc6}Buffer{color}{color:#f29e74}>{color}{color:#cbccc6}
 serialized_buffer{color}{color:#cbccc6};{color}
{color:#ffa759}if{color} 
{color:#cbccc6}({color}{color:#f29e74}!{color}{color:#73d0ff}arrow{color}{color:#cbccc6}::{color}{color:#73d0ff}ipc{color}{color:#cbccc6}::{color}{color:#ffd580}SerializeRecordBatch{color}{color:#cbccc6}({color}
{color:#f29e74}*{color}{color:#cbccc6}record_batch{color}{color:#cbccc6},{color}
 
{color:#73d0ff}arrow{color}{color:#cbccc6}::{color}{color:#ffd580}default_memory_pool{color}{color:#cbccc6}(){color}{color:#cbccc6},{color}
 
{color:#f29e74}&{color}{color:#cbccc6}serialized_buffer{color}{color:#cbccc6}){color}
{color:#cbccc6} .{color}{color:#ffd580}ok{color}{color:#cbccc6}()){color} 
{color:#cbccc6}{{color}
{color:#ffa759}throw{color} 
{color:#73d0ff}std{color}{color:#cbccc6}::{color}{color:#ffd580}runtime_error{color}{color:#cbccc6}({color}{color:#bae67e}"Error:
 Serializing Records."{color}{color:#cbccc6}){color}{color:#cbccc6};{color}
{color:#cbccc6}}{color}
{color:#cbccc6}}{color}



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