[GitHub] spark pull request #21054: [SPARK-23907][SQL] Add regr_* functions

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[GitHub] spark pull request #21054: [SPARK-23907][SQL] Add regr_* functions

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[GitHub] spark pull request #21054: [SPARK-23907][SQL] Add regr_* functions

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[GitHub] spark pull request #21054: [SPARK-23907][SQL] Add regr_* functions

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[GitHub] spark pull request #21054: [SPARK-23907][SQL] Add regr_* functions

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[GitHub] spark pull request #21054: [SPARK-23907][SQL] Add regr_* functions

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[GitHub] spark pull request #21054: [SPARK-23907][SQL] Add regr_* functions

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[GitHub] spark pull request #21054: [SPARK-23907][SQL] Add regr_* functions

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[GitHub] spark pull request #21054: [SPARK-23907][SQL] Add regr_* functions

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[GitHub] spark pull request #21054: [SPARK-23907][SQL] Add regr_* functions

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[GitHub] spark pull request #21054: [SPARK-23907][SQL] Add regr_* functions

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[GitHub] spark pull request #21054: [SPARK-23907][SQL] Add regr_* functions

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[GitHub] spark pull request #21054: [SPARK-23907][SQL] Add regr_* functions

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[GitHub] spark pull request #21054: [SPARK-23907][SQL] Add regr_* functions

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[GitHub] spark pull request #21054: [SPARK-23907][SQL] Add regr_* functions

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[GitHub] spark pull request #21054: [SPARK-23907][SQL] Add regr_* functions

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[GitHub] spark pull request #21054: [SPARK-23907][SQL] Add regr_* functions

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[GitHub] spark pull request #21054: [SPARK-23907][SQL] Add regr_* functions

GitHub user mgaido91 opened a pull request: https://github.com/apache/spark/pull/21054 [SPARK-23907][SQL] Add regr_* functions ## What changes were proposed in this pull request? The PR introduces regr_slope, regr_intercept, regr_r2, regr_sxx, regr_syy, regr_sxy,