[jira] [Created] (HIVE-26955) Alter table change column data type of a Parquet table throws exception

["Taraka Rama Rao Lethavadla (Jira)" <ji...@apache.org>]

Taraka Rama Rao Lethavadla created HIVE-26955:
-------------------------------------------------

             Summary: Alter table change column data type of a Parquet table throws exception
                 Key: HIVE-26955
                 URL: https://issues.apache.org/jira/browse/HIVE-26955
             Project: Hive
          Issue Type: Bug
          Components: HiveServer2
            Reporter: Taraka Rama Rao Lethavadla


Steps to reproduce
{noformat}
create table test_parquet (id decimal) stored as parquet;
insert into test_parquet values(238);
alter table test_parquet change id id string;
select * from test_parquet;

Error: java.io.IOException: org.apache.parquet.io.ParquetDecodingException: Can not read value at 1 in block 0 in file hdfs:/namenode:8020/warehouse/tablespace/managed/hive/test_parquet/delta_0000001_0000001_0000/000000_0 (state=,code=0)
    at org.apache.hadoop.hive.ql.exec.FetchOperator.getNextRow(FetchOperator.java:624)
    at org.apache.hadoop.hive.ql.exec.FetchOperator.pushRow(FetchOperator.java:531)
    at org.apache.hadoop.hive.ql.exec.FetchTask.executeInner(FetchTask.java:194)
    ... 55 more
Caused by: org.apache.parquet.io.ParquetDecodingException: Can not read value at 1 in block 0 in file file:/home/centos/Apache-Hive-Tarak/itests/qtest/target/localfs/warehouse/test_parquet/000000_0
    at org.apache.parquet.hadoop.InternalParquetRecordReader.nextKeyValue(InternalParquetRecordReader.java:255)
    at org.apache.parquet.hadoop.ParquetRecordReader.nextKeyValue(ParquetRecordReader.java:207)
    at org.apache.hadoop.hive.ql.io.parquet.read.ParquetRecordReaderWrapper.<init>(ParquetRecordReaderWrapper.java:87)
    at org.apache.hadoop.hive.ql.io.parquet.MapredParquetInputFormat.getRecordReader(MapredParquetInputFormat.java:89)
    at org.apache.hadoop.hive.ql.exec.FetchOperator$FetchInputFormatSplit.getRecordReader(FetchOperator.java:771)
    at org.apache.hadoop.hive.ql.exec.FetchOperator.getRecordReader(FetchOperator.java:335)
    at org.apache.hadoop.hive.ql.exec.FetchOperator.getNextRow(FetchOperator.java:562)
    ... 57 more
Caused by: java.lang.ClassCastException: org.apache.hadoop.hive.serde2.typeinfo.PrimitiveTypeInfo cannot be cast to org.apache.hadoop.hive.serde2.typeinfo.DecimalTypeInfo
    at org.apache.hadoop.hive.ql.io.parquet.convert.ETypeConverter$8$5.convert(ETypeConverter.java:669)
    at org.apache.hadoop.hive.ql.io.parquet.convert.ETypeConverter$8$5.convert(ETypeConverter.java:664)
    at org.apache.hadoop.hive.ql.io.parquet.convert.ETypeConverter$BinaryConverter.addBinary(ETypeConverter.java:977)
    at org.apache.parquet.column.impl.ColumnReaderBase$2$6.writeValue(ColumnReaderBase.java:360)
    at org.apache.parquet.column.impl.ColumnReaderBase.writeCurrentValueToConverter(ColumnReaderBase.java:410)
    at org.apache.parquet.column.impl.ColumnReaderImpl.writeCurrentValueToConverter(ColumnReaderImpl.java:30)
    at org.apache.parquet.io.RecordReaderImplementation.read(RecordReaderImplementation.java:406)
    at org.apache.parquet.hadoop.InternalParquetRecordReader.nextKeyValue(InternalParquetRecordReader.java:230)
    ... 63 more{noformat}
However the same is working as expected in ORC table
{noformat}
create table test_orc (id decimal) stored as orc;
insert into test_orc values(238);
alter table test_orc change id id string;
select * from test_orc;
+--------------+
| test_orc.id  |
+--------------+
| 238          |
+--------------+{noformat}
As well as text table
{noformat}
create table test_text (id decimal) stored as textfile;
insert into test_text values(238);
alter table test_text change id id string;
select * from test_text;
+---------------+
| test_text.id  |
+---------------+
| 238           |
+---------------+{noformat}
 



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