object FileSourceMetadataAttribute
The internal representation of the FileSourceMetadataAttribute, it sets metadata_col to
and file_source_metadata_coltrue in AttributeReference's metadata.
This is a super type of FileSourceConstantMetadataAttribute and
FileSourceGeneratedMetadataAttribute.
- apply() will create a file source metadata attribute reference - unapply() will check if an attribute reference is any file source metadata attribute reference
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- val FILE_SOURCE_METADATA_COL_ATTR_KEY: String
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- def cleanupFileSourceMetadataInformation(attr: Attribute): Attribute
Cleanup the internal metadata information of an attribute if it is a FileSourceConstantMetadataAttribute or FileSourceGeneratedMetadataAttribute.
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- def unapply(attr: AttributeReference): Option[AttributeReference]
Matches if attr is any File source metadata attribute (including constant and generated).
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