PARQUET_FALLBACK_SCHEMA_RESOLUTION Query Option (Impala 2.6 or higher only)
The
PARQUET_FALLBACK_SCHEMA_RESOLUTION query option allows Impala to look
up columns within Parquet files by column name, rather than column order,
when necessary.
The allowed values are:
- POSITION (0)
- NAME (1)
Usage notes:
By default, Impala looks up columns within a Parquet file based on
the order of columns in the table.
The name setting for this option enables behavior for
Impala queries similar to the Hive setting parquet.column.index access=false.
It also allows Impala to query Parquet files created by Hive with the
parquet.column.index.access=false setting in effect.
Type: integer or string
Added in: Impala 2.6.0
Related information: