Avro file headers must be less than 1MB.

The data in an Avro block must be no larger than 64MiB before applying any compression.

Lakehouse only supports uncompressed Avro blocks, or Avro blocks compressed with Snappy or Deflate algorithms. Lakehouse does not support other compression algorithms.

Lakehouse does not support these data types in Avro files: Array, Map, and nested records. Lakehouse marks columns with these data types as NOT SECONDARY, and does not load them.

Lakehouse only supports an Avro union between one supported data type and NULL.

The Avro DECIMAL data type is limited to the scale and precision supported by MySQL.

Avro data with FIXED values or values in BYTES are only supported with the Avro DECIMAL data type.