[SPARK-44815][CONNECT]Cache df.schema to avoid extra RPC #42499
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grundprinzip
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# Conflicts: # python/pyspark/sql/connect/dataframe.py
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Merging to master. |
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What changes were proposed in this pull request?
This patch caches the result of the
df.schemacall in the DataFrame to avoid the extra roundtrip to the Spark Connect service to retrieve the columns or the schema. Since the Dataframe is immutable, the schema will not change.Why are the changes needed?
Performance / Stability
Does this PR introduce any user-facing change?
No
How was this patch tested?
Existing UT