| /* |
| * 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.druid.sql.calcite.expression.builtin; |
| |
| import org.apache.calcite.rex.RexCall; |
| import org.apache.calcite.rex.RexLiteral; |
| import org.apache.calcite.rex.RexNode; |
| import org.apache.calcite.sql.SqlFunction; |
| import org.apache.calcite.sql.SqlFunctionCategory; |
| import org.apache.calcite.sql.type.SqlTypeFamily; |
| import org.apache.calcite.sql.type.SqlTypeName; |
| import org.apache.druid.query.filter.DimFilter; |
| import org.apache.druid.query.filter.RegexDimFilter; |
| import org.apache.druid.segment.VirtualColumn; |
| import org.apache.druid.segment.column.RowSignature; |
| import org.apache.druid.sql.calcite.expression.DruidExpression; |
| import org.apache.druid.sql.calcite.expression.Expressions; |
| import org.apache.druid.sql.calcite.expression.OperatorConversions; |
| import org.apache.druid.sql.calcite.expression.SqlOperatorConversion; |
| import org.apache.druid.sql.calcite.planner.PlannerContext; |
| import org.apache.druid.sql.calcite.rel.VirtualColumnRegistry; |
| |
| import javax.annotation.Nullable; |
| import java.util.List; |
| |
| public class RegexpLikeOperatorConversion implements SqlOperatorConversion |
| { |
| private static final SqlFunction SQL_FUNCTION = OperatorConversions |
| .operatorBuilder("REGEXP_LIKE") |
| .operandTypes(SqlTypeFamily.CHARACTER, SqlTypeFamily.CHARACTER) |
| .requiredOperands(2) |
| .literalOperands(1) |
| .returnTypeNonNull(SqlTypeName.BOOLEAN) |
| .functionCategory(SqlFunctionCategory.STRING) |
| .build(); |
| |
| @Override |
| public SqlFunction calciteOperator() |
| { |
| return SQL_FUNCTION; |
| } |
| |
| @Override |
| public DruidExpression toDruidExpression( |
| final PlannerContext plannerContext, |
| final RowSignature rowSignature, |
| final RexNode rexNode |
| ) |
| { |
| return OperatorConversions.convertCall( |
| plannerContext, |
| rowSignature, |
| rexNode, |
| operands -> DruidExpression.fromFunctionCall("regexp_like", operands) |
| ); |
| } |
| |
| @Nullable |
| @Override |
| public DimFilter toDruidFilter( |
| final PlannerContext plannerContext, |
| final RowSignature rowSignature, |
| @Nullable final VirtualColumnRegistry virtualColumnRegistry, |
| final RexNode rexNode |
| ) |
| { |
| final List<RexNode> operands = ((RexCall) rexNode).getOperands(); |
| final DruidExpression druidExpression = Expressions.toDruidExpression( |
| plannerContext, |
| rowSignature, |
| operands.get(0) |
| ); |
| |
| if (druidExpression == null) { |
| return null; |
| } |
| |
| final String pattern = RexLiteral.stringValue(operands.get(1)); |
| |
| if (druidExpression.isSimpleExtraction()) { |
| return new RegexDimFilter( |
| druidExpression.getSimpleExtraction().getColumn(), |
| pattern, |
| druidExpression.getSimpleExtraction().getExtractionFn(), |
| null |
| ); |
| } else if (virtualColumnRegistry != null) { |
| VirtualColumn v = virtualColumnRegistry.getOrCreateVirtualColumnForExpression( |
| plannerContext, |
| druidExpression, |
| operands.get(0).getType() |
| ); |
| |
| return new RegexDimFilter(v.getOutputName(), pattern, null, null); |
| } else { |
| return null; |
| } |
| } |
| } |