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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 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,
 * 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.linq4j.Ord;
import com.hazelcast.org.apache.calcite.rel.type.RelDataType;
import com.hazelcast.org.apache.calcite.rel.type.RelDataTypeFactory;
import com.hazelcast.org.apache.calcite.schema.Function;
import com.hazelcast.org.apache.calcite.schema.FunctionParameter;
import com.hazelcast.org.apache.calcite.schema.TableMacro;
import com.hazelcast.org.apache.calcite.schema.TranslatableTable;
import com.hazelcast.org.apache.calcite.sql.SqlFunction;
import com.hazelcast.org.apache.calcite.sql.SqlFunctionCategory;
import com.hazelcast.org.apache.calcite.sql.SqlIdentifier;
import com.hazelcast.org.apache.calcite.sql.SqlKind;
import com.hazelcast.org.apache.calcite.sql.SqlOperatorBinding;
import com.hazelcast.org.apache.calcite.sql.SqlTableFunction;
import com.hazelcast.org.apache.calcite.sql.type.SqlOperandMetadata;
import com.hazelcast.org.apache.calcite.sql.type.SqlOperandTypeChecker;
import com.hazelcast.org.apache.calcite.sql.type.SqlOperandTypeInference;
import com.hazelcast.org.apache.calcite.sql.type.SqlReturnTypeInference;
import com.hazelcast.org.apache.calcite.util.Util;

import com.hazelcast.org.checkerframework.checker.nullness.qual.Nullable;

import java.util.ArrayList;
import java.util.List;

/**
 * User-defined table macro.
 *
 * 

Created by the validator, after resolving a function call to a function * defined in a Calcite schema. */ public class SqlUserDefinedTableMacro extends SqlFunction implements SqlTableFunction { private final TableMacro tableMacro; @Deprecated // to be removed before 2.0 public SqlUserDefinedTableMacro(SqlIdentifier opName, SqlReturnTypeInference returnTypeInference, SqlOperandTypeInference operandTypeInference, @Nullable SqlOperandTypeChecker operandTypeChecker, List paramTypes, TableMacro tableMacro) { this(opName, SqlKind.OTHER_FUNCTION, returnTypeInference, operandTypeInference, operandTypeChecker instanceof SqlOperandMetadata ? (SqlOperandMetadata) operandTypeChecker : null, tableMacro); Util.discard(paramTypes); // no longer used } /** Creates a user-defined table macro. */ public SqlUserDefinedTableMacro(SqlIdentifier opName, SqlKind kind, SqlReturnTypeInference returnTypeInference, SqlOperandTypeInference operandTypeInference, @Nullable SqlOperandMetadata operandMetadata, TableMacro tableMacro) { super(Util.last(opName.names), opName, kind, returnTypeInference, operandTypeInference, operandMetadata, SqlFunctionCategory.USER_DEFINED_TABLE_FUNCTION); this.tableMacro = tableMacro; } @Override public @Nullable SqlOperandMetadata getOperandTypeChecker() { return (@Nullable SqlOperandMetadata) super.getOperandTypeChecker(); } @SuppressWarnings("deprecation") @Override public List getParamNames() { return Util.transform(tableMacro.getParameters(), FunctionParameter::getName); } /** Returns the table in this UDF, or null if there is no table. */ public TranslatableTable getTable(SqlOperatorBinding callBinding) { List<@Nullable Object> arguments = convertArguments(callBinding, tableMacro, getNameAsId(), true); return tableMacro.apply(arguments); } /** * Converts arguments from {@link com.hazelcast.org.apache.calcite.sql.SqlNode} to * java object format. * * @param callBinding Operator bound to arguments * @param function target function to get parameter types from * @param opName name of the operator to use in error message * @param failOnNonLiteral true when conversion should fail on non-literal * @return converted list of arguments */ static List<@Nullable Object> convertArguments(SqlOperatorBinding callBinding, Function function, SqlIdentifier opName, boolean failOnNonLiteral) { RelDataTypeFactory typeFactory = callBinding.getTypeFactory(); List<@Nullable Object> arguments = new ArrayList<>(callBinding.getOperandCount()); Ord.forEach(function.getParameters(), (parameter, i) -> { final RelDataType type = parameter.getType(typeFactory); final Object value; if (callBinding.isOperandLiteral(i, true)) { value = callBinding.getOperandLiteralValue(i, type); } else { if (failOnNonLiteral) { throw new IllegalArgumentException("All arguments of call to macro " + opName + " should be literal. Actual argument #" + parameter.getOrdinal() + " (" + parameter.getName() + ") is not literal"); } if (type.isNullable()) { value = null; } else { value = 0L; } } arguments.add(value); }); return arguments; } @Override public SqlReturnTypeInference getRowTypeInference() { return this::inferRowType; } private RelDataType inferRowType(SqlOperatorBinding callBinding) { final RelDataTypeFactory typeFactory = callBinding.getTypeFactory(); final TranslatableTable table = getTable(callBinding); return table.getRowType(typeFactory); } }





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