[PARQUET-26] Parquet doesn't recognize the nested Array type in MAP as ArrayWritable.

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Assignee: Ryan Blue
• Reporter: Mala Chikka Kempanna
• Created: 23/Jul/14 16:58
• Updated: 23/Jun/24 03:26
• Resolved: 10/Mar/15 22:26

Description

When trying to insert hive data of type of MAP<string, array<int>> into Parquet, it throws the following error

Caused by: parquet.io.ParquetEncodingException: This should be an ArrayWritable or MapWritable: org.apache.hadoop.hive.ql.io.parquet.writable.BinaryWritable@c644ef1c
at org.apache.hadoop.hive.ql.io.parquet.write.DataWritableWriter.writeData(DataWritableWriter.java:86)

Problem is reproducible with following steps:
Relevant test data is attached.

1.
CREATE TABLE test_hive (
node string,
stime string,
stimeutc string,
swver string,
moid MAP <string,string>,
pdfs MAP <string,array<int>>,
utcdate string,
motype string)
ROW FORMAT DELIMITED
FIELDS TERMINATED BY '|'
COLLECTION ITEMS TERMINATED BY ','
MAP KEYS TERMINATED BY '=';

2.
LOAD DATA LOCAL INPATH '/root/38388/test.dat' INTO TABLE test_hive;

3.

CREATE TABLE test_parquet(
pdfs MAP <string,array<int>>
)
STORED AS PARQUET ;

4.

INSERT INTO TABLE test_parquet SELECT pdfs FROM test_hive;

Issue Links

• depends upon: HIVE-8909 Hive doesn't correctly read Parquet nested types
• is blocked by: HIVE-8949 Test for PARQUET-26