com.hazelcast.org.apache.calcite.sql.validate.ProcedureNamespace Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* 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 com.hazelcast.com.liance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.com.hazelcast.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,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.hazelcast.org.apache.calcite.sql.validate;
import com.hazelcast.org.apache.calcite.rel.type.RelDataType;
import com.hazelcast.org.apache.calcite.sql.SqlCall;
import com.hazelcast.org.apache.calcite.sql.SqlCallBinding;
import com.hazelcast.org.apache.calcite.sql.SqlNode;
import com.hazelcast.org.apache.calcite.sql.SqlOperator;
import com.hazelcast.org.apache.calcite.sql.type.SqlTypeName;
/**
* Namespace whose contents are defined by the result of a call to a
* user-defined procedure.
*/
public class ProcedureNamespace extends AbstractNamespace {
//~ Instance fields --------------------------------------------------------
private final SqlValidatorScope scope;
private final SqlCall call;
//~ Constructors -----------------------------------------------------------
ProcedureNamespace(
SqlValidatorImpl validator,
SqlValidatorScope scope,
SqlCall call,
SqlNode enclosingNode) {
super(validator, enclosingNode);
this.scope = scope;
this.call = call;
}
//~ Methods ----------------------------------------------------------------
public RelDataType validateImpl(RelDataType targetRowType) {
validator.inferUnknownTypes(validator.unknownType, scope, call);
final RelDataType type = validator.deriveTypeImpl(scope, call);
final SqlOperator operator = call.getOperator();
final SqlCallBinding callBinding =
new SqlCallBinding(validator, scope, call);
if (operator instanceof SqlUserDefinedTableFunction) {
assert type.getSqlTypeName() == SqlTypeName.CURSOR
: "User-defined table function should have CURSOR type, not " + type;
final SqlUserDefinedTableFunction udf =
(SqlUserDefinedTableFunction) operator;
return udf.getRowType(validator.typeFactory, callBinding.operands());
} else if (operator instanceof SqlUserDefinedTableMacro) {
assert type.getSqlTypeName() == SqlTypeName.CURSOR
: "User-defined table macro should have CURSOR type, not " + type;
final SqlUserDefinedTableMacro udf =
(SqlUserDefinedTableMacro) operator;
return udf.getTable(validator.typeFactory, callBinding.operands())
.getRowType(validator.typeFactory);
}
return type;
}
public SqlNode getNode() {
return call;
}
}