Some common datatype (of real world backend systems) are not supported for type mapping, neither automatic, nor manual. So parquet reader is useless for such purposes, needs to be rebuild python code
e.g.: TIMESTAMP_MICROS (INT64) or DECIMAL (INT64).
Would be nice to have, as parquet is becoming more and more a file format of choice.
Knime output:
WARN Parquet Reader 0:3
org.knime.bigdata.fileformats.utility.BigDataFileFormatException: Input type mappings are missing for columns:
NET_VALUE (DECIMAL (INT64)),
CREATED_ON_SOLDTO (TIMESTAMP_MICROS (INT64)),
CREATED_ON_SHIPTO (TIMESTAMP_MICROS (INT64)),
CREATED_ON (TIMESTAMP_MICROS (INT64))