{ "type": "SQLOperator", "node_name": ["HDFS_SCAN_NODE", "KUDU_SCAN_NODE", "HBASE_SCAN_NODE"], "collapse": true, "metric_names": [ "NumColumns", "LocalTime" ], "unit": 5, "rule": { "condition": "vars['NumColumns'] > 15", "expr": "float(vars['NumColumns'] - 15) / float(vars['NumColumns']) * vars['LocalTime']", "message": "Number of materialized columns is high (>15). Consider materializing less columns to improve the performance.", "label": "Many Materialized Columns" }, "fix": { "fixable": false } }