object TabixIndexHelper extends GlowLogging
Contains filter parsing tools and other tools used to apply tabix index
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def
getFileRangeToRead(hadoopFs: FileSystem, file: PartitionedFile, conf: Configuration, hasFilter: Boolean, useIndex: Boolean, filteredSimpleInterval: Option[SimpleInterval]): Option[(Long, Long)]
Performs all the checks needed to use tabix index If a check fails generates appropriate message Otherwise generates block range by querying tabix index based on the filteredSimpleInterval produces by makeFilteredInterval.
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def
makeFilteredInterval(filters: Seq[Filter], useFilterParser: Boolean, useIndex: Boolean): Option[SimpleInterval]
Getting Seq of filters, returns an Option[SimpleInterval] representing contig and SQI, and takes care of useFilterParser option.
Getting Seq of filters, returns an Option[SimpleInterval] representing contig and SQI, and takes care of useFilterParser option.
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Option[SimpleInterval] indicating contig and SQI of the filtered interval; None: if filter results in a null set of records; Contig is empty if filtering is skipped due to multiple contigs or unsupported elements.
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