| /* |
| * 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.kylin.query.enumerator; |
| |
| import java.util.Arrays; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Locale; |
| import java.util.Set; |
| |
| import org.apache.calcite.linq4j.Enumerator; |
| import org.apache.kylin.common.annotation.Clarification; |
| import org.apache.kylin.common.debug.BackdoorToggles; |
| import org.apache.kylin.common.util.StringUtil; |
| import org.apache.kylin.cube.CubeInstance; |
| import org.apache.kylin.cube.CubeManager; |
| import org.apache.kylin.cube.model.DimensionDesc; |
| import org.apache.kylin.metadata.model.ColumnDesc; |
| import org.apache.kylin.metadata.project.ProjectInstance; |
| import org.apache.kylin.metadata.project.RealizationEntry; |
| import org.apache.kylin.metadata.realization.IRealization; |
| import org.apache.kylin.metadata.tuple.Tuple; |
| import org.apache.kylin.query.relnode.OLAPContext; |
| import org.apache.kylin.query.schema.OLAPTable; |
| import org.apache.kylin.storage.hybrid.HybridInstance; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| @Clarification(deprecated = true, msg = "Only for HBase storage") |
| public class LookupTableEnumerator implements Enumerator<Object[]> { |
| private final static Logger logger = LoggerFactory.getLogger(LookupTableEnumerator.class); |
| |
| // private ILookupTable lookupTable; |
| private final List<ColumnDesc> colDescs; |
| private final Object[] current; |
| private Iterator<String[]> iterator; |
| |
| public LookupTableEnumerator(OLAPContext olapContext) { |
| |
| //TODO: assuming LookupTableEnumerator is handled by a cube |
| CubeInstance cube = null; |
| |
| if (olapContext.realization instanceof CubeInstance) { |
| cube = (CubeInstance) olapContext.realization; |
| ProjectInstance project = cube.getProjectInstance(); |
| List<RealizationEntry> realizationEntries = project.getRealizationEntries(); |
| String lookupTableName = olapContext.firstTableScan.getTableName(); |
| CubeManager cubeMgr = CubeManager.getInstance(cube.getConfig()); |
| |
| // Make force hit cube in lookup table |
| String forceHitCubeName = BackdoorToggles.getForceHitCube(); |
| if (!StringUtil.isEmpty(forceHitCubeName)) { |
| String forceHitCubeNameLower = forceHitCubeName.toLowerCase(Locale.ROOT); |
| String[] forceHitCubeNames = forceHitCubeNameLower.split(","); |
| final Set<String> forceHitCubeNameSet = new HashSet<String>(Arrays.asList(forceHitCubeNames)); |
| cube = cubeMgr.findLatestSnapshot( |
| (List<RealizationEntry>) realizationEntries.stream() |
| .filter(x -> forceHitCubeNameSet.contains(x.getRealization().toLowerCase(Locale.ROOT))), |
| lookupTableName, cube); |
| olapContext.realization = cube; |
| } else { |
| cube = cubeMgr.findLatestSnapshot(realizationEntries, lookupTableName, cube); |
| olapContext.realization = cube; |
| } |
| } else if (olapContext.realization instanceof HybridInstance) { |
| final HybridInstance hybridInstance = (HybridInstance) olapContext.realization; |
| final IRealization latestRealization = hybridInstance.getLatestRealization(); |
| if (latestRealization instanceof CubeInstance) { |
| cube = (CubeInstance) latestRealization; |
| } else { |
| throw new IllegalStateException(); |
| } |
| } |
| |
| String lookupTableName = olapContext.firstTableScan.getTableName(); |
| DimensionDesc dim = cube.getDescriptor().findDimensionByTable(lookupTableName); |
| if (dim == null) |
| throw new IllegalStateException("No dimension with derived columns found for lookup table " + lookupTableName + ", cube desc " + cube.getDescriptor()); |
| |
| CubeManager cubeMgr = CubeManager.getInstance(cube.getConfig()); |
| // this.lookupTable = cubeMgr.getLookupTable(cube.getLatestReadySegment(), dim.getJoin()); |
| |
| OLAPTable olapTable = (OLAPTable) olapContext.firstTableScan.getOlapTable(); |
| this.colDescs = olapTable.getSourceColumns(); |
| this.current = new Object[colDescs.size()]; |
| |
| reset(); |
| } |
| |
| @Override |
| public boolean moveNext() { |
| boolean hasNext = iterator.hasNext(); |
| if (hasNext) { |
| String[] row = iterator.next(); |
| for (int i = 0, n = colDescs.size(); i < n; i++) { |
| ColumnDesc colDesc = colDescs.get(i); |
| int colIdx = colDesc.getZeroBasedIndex(); |
| if (colIdx >= 0) { |
| current[i] = Tuple.convertOptiqCellValue(row[colIdx], colDesc.getUpgradedType().getName()); |
| } else { |
| current[i] = null; // fake column |
| } |
| } |
| } |
| return hasNext; |
| } |
| |
| @Override |
| public Object[] current() { |
| // NOTE if without the copy, sql_lookup/query03.sql will yields messy result. Very weird coz other lookup queries are all good. |
| return Arrays.copyOf(current, current.length); |
| } |
| |
| @Override |
| public void reset() { |
| // this.iterator = lookupTable.iterator(); |
| } |
| |
| @Override |
| public void close() { |
| // try { |
| // lookupTable.close(); |
| // } catch (IOException e) { |
| // logger.error("error when close lookup table", e); |
| // } |
| } |
| |
| } |