com.hazelcast.org.apache.calcite.adapter.enumerable.EnumerableTableFunctionScanRule Maven / Gradle / Ivy
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* this work for additional information regarding copyright ownership.
* The ASF licenses this file to you under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
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package com.hazelcast.org.apache.calcite.adapter.enumerable;
import com.hazelcast.org.apache.calcite.plan.Convention;
import com.hazelcast.org.apache.calcite.plan.RelTraitSet;
import com.hazelcast.org.apache.calcite.rel.RelNode;
import com.hazelcast.org.apache.calcite.rel.convert.ConverterRule;
import com.hazelcast.org.apache.calcite.rel.core.TableFunctionScan;
import com.hazelcast.org.apache.calcite.rel.logical.LogicalTableFunctionScan;
/** Rule to convert a {@link LogicalTableFunctionScan} to an {@link EnumerableTableFunctionScan}.
* You may provide a custom config to convert other nodes that extend {@link TableFunctionScan}.
*
* @see EnumerableRules#ENUMERABLE_TABLE_FUNCTION_SCAN_RULE */
public class EnumerableTableFunctionScanRule extends ConverterRule {
/** Default configuration. */
public static final Config DEFAULT_CONFIG = Config.INSTANCE
.withConversion(LogicalTableFunctionScan.class, Convention.NONE,
EnumerableConvention.INSTANCE, "EnumerableTableFunctionScanRule")
.withRuleFactory(EnumerableTableFunctionScanRule::new);
/** Creates an EnumerableTableFunctionScanRule. */
protected EnumerableTableFunctionScanRule(Config config) {
super(config);
}
@Override public RelNode convert(RelNode rel) {
final RelTraitSet traitSet =
rel.getTraitSet().replace(EnumerableConvention.INSTANCE);
TableFunctionScan scan = (TableFunctionScan) rel;
return new EnumerableTableFunctionScan(rel.getCluster(), traitSet,
convertList(scan.getInputs(), traitSet.getTrait(0)),
scan.getElementType(), scan.getRowType(),
scan.getCall(), scan.getColumnMappings());
}
}
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