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Calling the create_dynamic_frame.from_catalog
is supposed to return a dynamic frame that is created using a Data Catalog database and table provided. However, in this case it is likely that the table input classification is UNKNOWN, when the crawler detects no pattern in files to classify it, a table with a classification UNKNOWN is created.
Check the table properties in Data Catalog for classification. See below link on creating a custom classifier.
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Hello - can you please explain from where you trying to read? You can also try
from_options
if you are trying to read from s3, rds and other sources.