julianhyde commented on a change in pull request #1102: [CALCITE-1515]
RelBuilder supports creating TableFunctionScan
URL: https://github.com/apache/calcite/pull/1102#discussion_r265400074
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File path: core/src/main/java/org/apache/calcite/rel/core/RelFactories.java
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@@ -549,6 +555,34 @@ public RelNode createMatch(RelNode input, RexNode pattern,
partitionKeys, orderKeys, interval);
}
}
+
+ /**
+ * Can create a {@link TableFunctionScan}
+ * of the appropriate type for a rule's calling convention.
+ */
+ public interface TableFunctionScanFactory {
+ /** Creates a {@link TableFunctionScan}. */
+ RelNode createTableFunctionScan(RelOptCluster cluster,
+ List<RelNode> inputs, RexNode rexCall, Type elementType,
+ RelDataType rowType, Set<RelColumnMapping> columnMappings);
Review comment:
Is `rowType` necessary? Is it possible to ask the table function to deduce
its own row type?
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