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- {
- "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
- }
- }
|