twdsilva commented on code in PR #2876: URL: https://github.com/apache/calcite/pull/2876#discussion_r1038666669
########## core/src/test/java/org/apache/calcite/test/TestMetadataHandlers.java: ########## @@ -0,0 +1,108 @@ +/* + * 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.calcite.test; + +import org.apache.calcite.avatica.util.DateTimeUtils; +import org.apache.calcite.plan.RelOptPredicateList; +import org.apache.calcite.rel.RelNode; +import org.apache.calcite.rel.core.TableScan; +import org.apache.calcite.rel.metadata.BuiltInMetadata; +import org.apache.calcite.rel.metadata.ReflectiveRelMetadataProvider; +import org.apache.calcite.rel.metadata.RelMdRowCount; +import org.apache.calcite.rel.metadata.RelMdSelectivity; +import org.apache.calcite.rel.metadata.RelMdUtil; +import org.apache.calcite.rel.metadata.RelMetadataProvider; +import org.apache.calcite.rel.metadata.RelMetadataQuery; +import org.apache.calcite.rex.RexCall; +import org.apache.calcite.rex.RexExecutor; +import org.apache.calcite.rex.RexLiteral; +import org.apache.calcite.rex.RexNode; +import org.apache.calcite.rex.RexSimplify; +import org.apache.calcite.rex.RexUtil; +import org.apache.calcite.sql.SqlKind; +import org.apache.calcite.util.Sarg; +import org.apache.calcite.util.TimestampString; +import org.apache.calcite.util.Util; + +import com.google.common.collect.Range; + +import org.checkerframework.checker.nullness.qual.Nullable; + +/** + * Metadata handlers that are used in {@link MaterializedViewRelOptRulesTest}. + */ +public class TestMetadataHandlers { + /** + * Modify the rowCount of the materialized view to be lower than the base table. + */ + public static class TestRelMdRowCount extends RelMdRowCount { + public static final RelMetadataProvider SOURCE = + ReflectiveRelMetadataProvider.reflectiveSource( + new TestRelMdRowCount(), BuiltInMetadata.RowCount.Handler.class); + + public Double getRowCount(TableScan rel, RelMetadataQuery mq) { + if (rel.getTable().getQualifiedName().toString().equalsIgnoreCase("[hr, events]")) { + return 100000d; + } else { + return 100d; + } + } + } + + /** + * Modify the selectivity of SArg to be more selective for a smaller range. + */ + @SuppressWarnings("BetaApi") + public static class TestRelMdSelectivity extends RelMdSelectivity { + + public static final RelMetadataProvider SOURCE = + ReflectiveRelMetadataProvider.reflectiveSource( + new TestRelMdSelectivity(), BuiltInMetadata.Selectivity.Handler.class); + + public Double getSelectivity(RelNode rel, RelMetadataQuery mq, + @Nullable RexNode predicate) { + if (predicate == null) { + return RelMdUtil.guessSelectivity(predicate); + } + final RexExecutor executor = + Util.first(rel.getCluster().getPlanner().getExecutor(), RexUtil.EXECUTOR); + final RexSimplify rexSimplify = new RexSimplify(rel.getCluster().getRexBuilder(), + RelOptPredicateList.EMPTY, executor); + RexNode e = rexSimplify.simplify(predicate); + if (e.getKind() == SqlKind.SEARCH) { + RexCall call = (RexCall) e; + Sarg sarg = ((RexLiteral) call.getOperands().get(1)).getValueAs(Sarg.class); + double selectivity = 0.d; + for (Object o : sarg.rangeSet.asRanges()) { + Range r = (Range) o; + if (!r.hasLowerBound() || !r.hasUpperBound() + || !(r.lowerEndpoint() instanceof TimestampString) + || !(r.lowerEndpoint() instanceof TimestampString)) { + // ignore predicates where the type isn't a timestamp + return RelMdUtil.guessSelectivity(predicate); + } + long lowerBound = ((TimestampString) r.lowerEndpoint()).getMillisSinceEpoch(); + long upperBound = ((TimestampString) r.upperEndpoint()).getMillisSinceEpoch(); + // only used for a range less than one day + selectivity += (upperBound - lowerBound) / (Double.valueOf(DateTimeUtils.MILLIS_PER_DAY)); Review Comment: done -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: commits-unsubscr...@calcite.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
