fsk119 commented on code in PR #24183: URL: https://github.com/apache/flink/pull/24183#discussion_r1469457893
########## flink-table/flink-table-planner/src/main/java/org/apache/flink/table/planner/calcite/FlinkOperatorBinding.java: ########## @@ -0,0 +1,180 @@ +/* + * 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 org.apache.flink.table.planner.calcite; + +import org.apache.calcite.rel.type.RelDataType; +import org.apache.calcite.rel.type.RelDataTypeFactory; +import org.apache.calcite.rex.RexCallBinding; +import org.apache.calcite.rex.RexNode; +import org.apache.calcite.runtime.CalciteException; +import org.apache.calcite.runtime.Resources; +import org.apache.calcite.sql.SqlCallBinding; +import org.apache.calcite.sql.SqlKind; +import org.apache.calcite.sql.SqlNode; +import org.apache.calcite.sql.SqlOperator; +import org.apache.calcite.sql.SqlOperatorBinding; +import org.apache.calcite.sql.type.SqlOperandMetadata; +import org.apache.calcite.sql.type.SqlOperandTypeChecker; +import org.apache.calcite.sql.validate.SqlMonotonicity; +import org.apache.calcite.sql.validate.SqlValidatorException; +import org.checkerframework.checker.nullness.qual.Nullable; + +import java.util.Collections; +import java.util.List; + +/** + * The proxy implementation of {@link SqlOperatorBinding} can be used to correct the operator type + * when using named parameter. + */ +public class FlinkOperatorBinding extends SqlOperatorBinding { + + private final SqlOperatorBinding sqlOperatorBinding; + + private final List<RelDataType> argumentTypes; + + public FlinkOperatorBinding(SqlOperatorBinding sqlOperatorBinding) { + super(sqlOperatorBinding.getTypeFactory(), sqlOperatorBinding.getOperator()); + this.sqlOperatorBinding = sqlOperatorBinding; + this.argumentTypes = getArgumentTypes(); + } + + @Override + public int getOperandCount() { + if (!argumentTypes.isEmpty()) { + return argumentTypes.size(); + } else { + return sqlOperatorBinding.getOperandCount(); + } + } + + @Override + public RelDataType getOperandType(int ordinal) { + if (sqlOperatorBinding instanceof SqlCallBinding) { + SqlNode sqlNode = ((SqlCallBinding) sqlOperatorBinding).operands().get(ordinal); + if (sqlNode.getKind() == SqlKind.DEFAULT && !argumentTypes.isEmpty()) { + return argumentTypes.get(ordinal); + } else { + return ((SqlCallBinding) sqlOperatorBinding) + .getValidator() + .deriveType(((SqlCallBinding) sqlOperatorBinding).getScope(), sqlNode); + } + } else if (sqlOperatorBinding instanceof RexCallBinding) { + RexNode rexNode = ((RexCallBinding) sqlOperatorBinding).operands().get(ordinal); + if (rexNode.getKind() == SqlKind.DEFAULT && !argumentTypes.isEmpty()) { + return argumentTypes.get(ordinal); + } else { + return rexNode.getType(); + } + } + return sqlOperatorBinding.getOperandType(ordinal); + } + + @Override + public CalciteException newError(Resources.ExInst<SqlValidatorException> e) { + return sqlOperatorBinding.newError(e); + } + + @Override + public int getGroupCount() { + return sqlOperatorBinding.getGroupCount(); + } + + @Override + public boolean hasFilter() { + return sqlOperatorBinding.hasFilter(); + } + + @Override + public SqlOperator getOperator() { + return sqlOperatorBinding.getOperator(); + } + + @Override + public RelDataTypeFactory getTypeFactory() { + return sqlOperatorBinding.getTypeFactory(); + } + + @Override + public @Nullable String getStringLiteralOperand(int ordinal) { + return sqlOperatorBinding.getStringLiteralOperand(ordinal); + } + + @Override // to be removed before 2.0 + public int getIntLiteralOperand(int ordinal) { + return sqlOperatorBinding.getIntLiteralOperand(ordinal); + } + + @Override + public boolean isOperandNull(int ordinal, boolean allowCast) { + return sqlOperatorBinding.isOperandNull(ordinal, allowCast); + } + + @Override + public boolean isOperandLiteral(int ordinal, boolean allowCast) { + return sqlOperatorBinding.isOperandLiteral(ordinal, allowCast); + } + + @Override + public @Nullable Object getOperandLiteralValue(int ordinal, RelDataType type) { + return sqlOperatorBinding.getOperandLiteralValue(ordinal, type); + } + + @Override + public @Nullable Comparable getOperandLiteralValue(int ordinal) { + return sqlOperatorBinding.getOperandLiteralValue(ordinal); + } + + @Override + public SqlMonotonicity getOperandMonotonicity(int ordinal) { + return sqlOperatorBinding.getOperandMonotonicity(ordinal); + } + + @Override + public List<RelDataType> collectOperandTypes() { + return sqlOperatorBinding.collectOperandTypes(); + } + + @Override + public @Nullable RelDataType getCursorOperand(int ordinal) { + return sqlOperatorBinding.getCursorOperand(ordinal); + } + + @Override + public @Nullable String getColumnListParamInfo( + int ordinal, String paramName, List<String> columnList) { + return sqlOperatorBinding.getColumnListParamInfo(ordinal, paramName, columnList); + } + + @Override + public <T extends Object> @Nullable T getOperandLiteralValue(int ordinal, Class<T> clazz) { + return sqlOperatorBinding.getOperandLiteralValue(ordinal, clazz); + } + + private List<RelDataType> getArgumentTypes() { Review Comment: nit: getArgumentTypes -> getNamedArgumentTypes -- This is an automated message from the Apache Git Service. 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