[SPARK-38198][SQL][3.2] Fix QueryExecution.debug#toFile use the passed in maxFields when explainMode is CodegenMode #35515
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What changes were proposed in this pull request?
QueryExecution.debug#toFilemethod supports passing inmaxFieldsand this parameter will be passed down whenexplainModeisSimpleMode,ExtendedMode, orCostMode.But the passed down
maxFieldswas ignored whenexplainModeisCostModebecauseQueryExecution#stringWithStatsoverrides it withSQLConf.get.maxToStringFieldsat present, so this pr removes the override behavior to let passed inmaxFieldstake effect.Why are the changes needed?
Bug fix
Does this PR introduce any user-facing change?
No
How was this patch tested?
Pass GA and add a new test case