Add statistical type aggregate functions, including autocorrelation, skewness, and linear regression#17292

Merged

JackieTien97 merged 16 commits into

apache:masterfrom

CoollZzz:feat/Statistical-Aggregate-Functions

Jun 4, 2026

Commits on Apr 28, 2026

Add correlation and covariance aggregate functions to the query engine
CoollZzz
committed
Enhance aggregate functions to support TIMESTAMP data type
CoollZzz
committed
Add regression aggregate functions: REGR_SLOPE and REGR_INTERCEPT
CoollZzz
committed
Add skewness and kurtosis aggregate functions with input validation
CoollZzz
committed
Refactor input validation for aggregate functions to streamline argument checks
CoollZzz
committed
Refactor aggregation function type checks to improve input validation
CoollZzz
committed
Refactor correlation and regression accumulators to improve code clarity by removing unnecessary comments and whitespace
CoollZzz
committed
Refactor skewness,corr calculation in central moment accumulators
CoollZzz
committed
Refactor correlation accumulators to use CovarianceAccumulator for covariance calculations
CoollZzz
committed
Implement removeIntermediate method for CentralMoment, Correlation, Covariance, and Regression accumulators to handle state removal
CoollZzz
committed
Add integration tests for correlation, covariance, regression, and moments functions
CoollZzz
committed
fix: address review comments for statistical aggregation functions
CoollZzz
committed

Commits on Apr 29, 2026

refactor: update package structure for statistical aggregation accumulators
CoollZzz
committed

Commits on May 17, 2026

feat: implement removeInput method for regression, covariance, and correlation accumulators
CoollZzz
committed

Commits on May 25, 2026

Merge tree-model statistical aggregation ITs into one class.
CoollZzz
committed

Commits on Jun 3, 2026

Fix statistical aggregation semantics and reviewer issues
CoollZzz
committed