beliefer opened a new pull request #24535: [SPARK-27640][SQL|Structured Streaming]Avoid duplicate lookups for datasource through provider URL: https://github.com/apache/spark/pull/24535 ## What changes were proposed in this pull request? Spark SQL using code as follows to lookup datasource. `DataSource.lookupDataSource(source, sparkSession.sqlContext.conf)` But exists some duplicate call. ## How was this patch tested? Exists UT.
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