Hive cannot determine the list of columns automatically based on Parquet serde

Today we are not able to create a parquet based hive table without having to specify the column names and types. When we try to define it the following way, we get the error
"14/08/20 17:27:46 ERROR ql.Driver: FAILED: SemanticException [Error 10043]: Either list of columns or a custom serializer should be specified"

```sql
CREATE TABLE parquet_test
ROW FORMAT SERDE
'org.apache.hadoop.hive.ql.io.parquet.serde.ParquetHiveSerDe'
STORED AS INPUTFORMAT
'org.apache.hadoop.hive.ql.io.parquet.MapredParquetInputFormat'
OUTPUTFORMAT
'org.apache.hadoop.hive.ql.io.parquet.MapredParquetOutputFormat'
LOCATION
'/user/pratik/campaigns';
```

Whereas if we create a hive table on top of AVRO based files, we do not need to specify the column names, hive automatically figures out the schema through the SerDe.

```sql
CREATE EXTERNAL TABLE campaigns
ROW FORMAT SERDE 'org.apache.hadoop.hive.serde2.avro.AvroSerDe'
STORED AS INPUTFORMAT 'org.apache.hadoop.hive.ql.io.avro.AvroContainerInputFormat'
OUTPUTFORMAT 'org.apache.hadoop.hive.ql.io.avro.AvroContainerOutputFormat'
LOCATION '/user/pratik/campaigns'
TBLPROPERTIES ('avro.schema.url'='hdfs:///user/pratik/campaigns.avsc');
```

**Reporter**: [Pratik Khadloya](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=tispratik)
**Assignee**: [Ashish Singh](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=singhashish) / @SinghAsDev

_{**Note**: *This issue was originally created as [PARQUET-76](https://issues.apache.org/jira/browse/PARQUET-76). Please see the [migration documentation](https://issues.apache.org/jira/browse/PARQUET-2502) for further details.*}

Esamina innanzitutto il report originale PARQUET-76 e la documentazione sulla migrazione collegata a PARQUET-2502. Conferma se l’individuazione automatica delle colonne per le tabelle Hive basate su Parquet è ancora necessaria o è stata spostata altrove, quindi individua gli attuali punti di ingresso dell’implementazione e dei test prima di definire l’ambito rimanente e i criteri di accettazione.

Scritto dal modello di indicizzazione a partire dal testo della issue.