Xiangrui Meng created SPARK-27534:
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Summary: Do not load `content` column in binary data source if it
is not selected
Key: SPARK-27534
URL: https://issues.apache.org/jira/browse/SPARK-27534
Project: Spark
Issue Type: Story
Components: SQL
Affects Versions: 3.0.0
Reporter: Xiangrui Meng
A follow-up task from SPARK-25348. To save I/O cost, Spark shouldn't attempt to
read the file if users didn't request the `content` column. For example:
{code}
spark.read.format("binaryFile").load(path).filter($"length" < 1000000).count()
{code}
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