com.hazelcast.org.apache.calcite.adapter.enumerable.EnumerableTableModify 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
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
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package com.hazelcast.org.apache.calcite.adapter.enumerable;
import com.hazelcast.org.apache.calcite.adapter.java.JavaTypeFactory;
import com.hazelcast.org.apache.calcite.linq4j.tree.BlockBuilder;
import com.hazelcast.org.apache.calcite.linq4j.tree.Expression;
import com.hazelcast.org.apache.calcite.linq4j.tree.Expressions;
import com.hazelcast.org.apache.calcite.linq4j.tree.ParameterExpression;
import com.hazelcast.org.apache.calcite.linq4j.tree.Types;
import com.hazelcast.org.apache.calcite.plan.RelOptCluster;
import com.hazelcast.org.apache.calcite.plan.RelOptTable;
import com.hazelcast.org.apache.calcite.plan.RelTraitSet;
import com.hazelcast.org.apache.calcite.prepare.Prepare;
import com.hazelcast.org.apache.calcite.rel.RelNode;
import com.hazelcast.org.apache.calcite.rel.core.TableModify;
import com.hazelcast.org.apache.calcite.rex.RexNode;
import com.hazelcast.org.apache.calcite.schema.ModifiableTable;
import com.hazelcast.org.apache.calcite.util.BuiltInMethod;
import com.hazelcast.org.checkerframework.checker.nullness.qual.Nullable;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
/** Implementation of {@link com.hazelcast.org.apache.calcite.rel.core.TableModify} in
* {@link com.hazelcast.org.apache.calcite.adapter.enumerable.EnumerableConvention enumerable calling convention}. */
public class EnumerableTableModify extends TableModify
implements EnumerableRel {
public EnumerableTableModify(RelOptCluster cluster, RelTraitSet traits,
RelOptTable table, Prepare.CatalogReader catalogReader, RelNode child,
Operation operation, @Nullable List updateColumnList,
@Nullable List sourceExpressionList, boolean flattened) {
super(cluster, traits, table, catalogReader, child, operation,
updateColumnList, sourceExpressionList, flattened);
assert child.getConvention() instanceof EnumerableConvention;
assert getConvention() instanceof EnumerableConvention;
final ModifiableTable modifiableTable =
table.unwrap(ModifiableTable.class);
if (modifiableTable == null) {
throw new AssertionError(); // TODO: user error in validator
}
}
@Override public RelNode copy(RelTraitSet traitSet, List inputs) {
return new EnumerableTableModify(
getCluster(),
traitSet,
getTable(),
getCatalogReader(),
sole(inputs),
getOperation(),
getUpdateColumnList(),
getSourceExpressionList(),
isFlattened());
}
@Override public Result implement(EnumerableRelImplementor implementor, Prefer pref) {
final BlockBuilder builder = new BlockBuilder();
final Result result = implementor.visitChild(
this, 0, (EnumerableRel) getInput(), pref);
Expression childExp =
builder.append(
"child", result.block);
final ParameterExpression collectionParameter =
Expressions.parameter(Collection.class,
builder.newName("collection"));
final Expression expression = table.getExpression(ModifiableTable.class);
assert expression != null; // TODO: user error in validator
assert ModifiableTable.class.isAssignableFrom(
Types.toClass(expression.getType())) : expression.getType();
builder.add(
Expressions.declare(
Modifier.FINAL,
collectionParameter,
Expressions.call(
expression,
BuiltInMethod.MODIFIABLE_TABLE_GET_MODIFIABLE_COLLECTION
.method)));
final Expression countParameter =
builder.append(
"count",
Expressions.call(collectionParameter, "size"),
false);
Expression convertedChildExp;
if (!getInput().getRowType().equals(getRowType())) {
final JavaTypeFactory typeFactory =
(JavaTypeFactory) getCluster().getTypeFactory();
final JavaRowFormat format = EnumerableTableScan.deduceFormat(table);
PhysType physType =
PhysTypeImpl.of(typeFactory, table.getRowType(), format);
List expressionList = new ArrayList<>();
final PhysType childPhysType = result.physType;
final ParameterExpression o_ =
Expressions.parameter(childPhysType.getJavaRowType(), "o");
final int fieldCount =
childPhysType.getRowType().getFieldCount();
for (int i = 0; i < fieldCount; i++) {
expressionList.add(
childPhysType.fieldReference(o_, i, physType.getJavaFieldType(i)));
}
convertedChildExp =
builder.append(
"convertedChild",
Expressions.call(
childExp,
BuiltInMethod.SELECT.method,
Expressions.lambda(
physType.record(expressionList), o_)));
} else {
convertedChildExp = childExp;
}
final Method method;
switch (getOperation()) {
case INSERT:
method = BuiltInMethod.INTO.method;
break;
case DELETE:
method = BuiltInMethod.REMOVE_ALL.method;
break;
default:
throw new AssertionError(getOperation());
}
builder.add(
Expressions.statement(
Expressions.call(
convertedChildExp, method, collectionParameter)));
final Expression updatedCountParameter =
builder.append(
"updatedCount",
Expressions.call(collectionParameter, "size"),
false);
builder.add(
Expressions.return_(
null,
Expressions.call(
BuiltInMethod.SINGLETON_ENUMERABLE.method,
Expressions.convert_(
Expressions.condition(
Expressions.greaterThanOrEqual(
updatedCountParameter, countParameter),
Expressions.subtract(
updatedCountParameter, countParameter),
Expressions.subtract(
countParameter, updatedCountParameter)),
long.class))));
final PhysType physType =
PhysTypeImpl.of(
implementor.getTypeFactory(),
getRowType(),
pref == Prefer.ARRAY
? JavaRowFormat.ARRAY : JavaRowFormat.SCALAR);
return implementor.result(physType, builder.toBlock());
}
}
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