[SPARK-25863][SPARK-21871][SQL] Check if code size statistics is empty or not in updateAndGetCompilationStats
## What changes were proposed in this pull request? `CodeGenerator.updateAndGetCompilationStats` throws an unsupported exception for empty code size statistics. This pr added code to check if it is empty or not. ## How was this patch tested? Pass Jenkins. Closes #23947 from maropu/SPARK-21871-FOLLOWUP. Authored-by: Takeshi Yamamuro <yamamuro@apache.org> Signed-off-by: Takeshi Yamamuro <yamamuro@apache.org>
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@ -1352,7 +1352,11 @@ object CodeGenerator extends Logging {
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}
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}.flatten
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codeSizes.max
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if (codeSizes.nonEmpty) {
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codeSizes.max
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} else {
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0
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}
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}
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/**
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