The function outputs a message and a model table.
OutputMessageTable Schema
The function saves this message to output_message_table, whose default value is default_dt_monitor_table in the current schema.
| Column | Data Type | Description | ||||||
|---|---|---|---|---|---|---|---|---|
| message | VARCHAR | Reports this information:
|
OutputTable Schema
This is the model table to input to DecisionForestPredict_MLE.
| Column | Data Type | Description |
|---|---|---|
| id_column | VARCHAR | [Appears only with IDColumn.] Unique row identifier from InputTable. |
| worker_ip | VARCHAR | IP address of worker that produced decision tree. |
| task_index | INTEGER | Identifier of worker that produced decision tree. |
| tree_num | INTEGER | Decision tree identifier. |
| tree | CLOB | JSON representation of decision tree. For JSON types that can appear in the representation, see following table. |
| num_processed_rows | INTEGER | Number of InputTable rows processed by the worker (excluding rows skipped because they contained NULL values). |
| num_total_rows | INTEGER | Number of InputTable rows allocated to the worker. |
JSON Types in JSON Representation of Decision Tree
| JSON Type | Description |
|---|---|
| responseCounts | Appears only for classification trees. Number of observations in each class at node identified by id. |
| sum | Appears only for regression trees. Sum of values of response variable at node identified by id. |
| sumSq | Appears only for regression trees. Sum of squared values of response variable at node identified by id. |
| size | Total number of observations at node identified by id. |
| id | Node identifier. |
| maxDepth | Maximum possible depth of tree, starting from node identified by id. For root node, value is max_depth; for leaf nodes, 0; for other nodes, maximum possible depth of tree, starting from that node. |
| split | Start of JSON item describing a split at node identified by id. |
| attr | Attribute (predictor) on which algorithm split at node identified by id. |
| leftCategories | Appears only for splits where attribute (identified by attr) is categorical. Categories assigned to left child of split. |
| rightCategories | Appears only for splits where attribute is categorical. Categories assigned to the right child of split. |
| score | Gini score of node identified by id. |
| type | Type of tree and split. Possible values:
|
| leftNodeSize | Number of observations assigned to left node of split. |
| rightNodeSize | Number of observations assigned to right node of split. |
| scoreImprove | Score improvement at node identified by id. |
| leftChild | Start of JSON item describing left child of node identified by id. |
| rightChild | Start of JSON item describing right child of node identified by id. |
| nodeType | Type of node identified by id. Possible values:
|