H2O is an Open Source, Distributed, Fast & Scalable Machine Learning Platform: Deep Learning, Gradient Boosting (GBM) & XGBoost, Random Forest, Generalized Linear Modeling (GLM with Elastic Net), K-Means, PCA, Generalized Additive Models (GAM), RuleFit, Support Vector Machine (SVM), Stacked Ensembles, Automatic Machine Learning (AutoML), etc.
Our user [~accountid:5a97e375228ed33491d07b31] reported an issue with SQLManager.
Currently, H2O-3 enforces all queries to start with "SELECT" Keyword. This does not allow our users to use Common Table Expressions.
The problem with SQLManager has been reported in https://0xdata.atlassian.net/browse/PUBDEV-5367 (commentary).