wgtmac commented on code in PR #1328:
URL: https://github.com/apache/parquet-mr/pull/1328#discussion_r1604376286
##########
parquet-generator/src/main/java/org/apache/parquet/filter2/IncrementallyUpdatedFilterPredicateGenerator.java:
##########
@@ -122,6 +127,11 @@ public void run() throws IOException {
}
addVisitEnd();
+ addContainsBegin();
+ addVisitBegin("Contains");
+ addContainsCase();
Review Comment:
Nothing to do with a `addContainsEnd()`? Perhaps adding a noop one for
better readability
##########
parquet-column/src/main/java/org/apache/parquet/filter2/predicate/ContainsRewriter.java:
##########
@@ -0,0 +1,185 @@
+/*
+ * 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.parquet.filter2.predicate;
+
+import java.util.Objects;
+import org.apache.parquet.filter2.predicate.FilterPredicate.Visitor;
+import org.apache.parquet.filter2.predicate.Operators.And;
+import org.apache.parquet.filter2.predicate.Operators.Contains;
+import org.apache.parquet.filter2.predicate.Operators.Eq;
+import org.apache.parquet.filter2.predicate.Operators.Gt;
+import org.apache.parquet.filter2.predicate.Operators.GtEq;
+import org.apache.parquet.filter2.predicate.Operators.In;
+import org.apache.parquet.filter2.predicate.Operators.LogicalNotUserDefined;
+import org.apache.parquet.filter2.predicate.Operators.Lt;
+import org.apache.parquet.filter2.predicate.Operators.LtEq;
+import org.apache.parquet.filter2.predicate.Operators.Not;
+import org.apache.parquet.filter2.predicate.Operators.NotEq;
+import org.apache.parquet.filter2.predicate.Operators.NotIn;
+import org.apache.parquet.filter2.predicate.Operators.Or;
+import org.apache.parquet.filter2.predicate.Operators.UserDefined;
+
+/**
+ * Recursively rewrites Contains predicates composed using And or Or into a
single Contains predicate
+ * containing all predicate assertions.
+ *
+ * This is a performance optimization, as all composed Contains sub-predicates
must share the same column, and
+ * can therefore can be applied efficiently as a single predicate pass.
+ */
+public final class ContainsRewriter implements Visitor<FilterPredicate> {
+ private static final ContainsRewriter INSTANCE = new ContainsRewriter();
+
+ public static FilterPredicate rewrite(FilterPredicate pred) {
+ Objects.requireNonNull(pred, "pred cannot be null");
+ return pred.accept(INSTANCE);
+ }
+
+ private ContainsRewriter() {}
+
+ @Override
+ public <T extends Comparable<T>> FilterPredicate visit(Eq<T> eq) {
+ return eq;
+ }
+
+ @Override
+ public <T extends Comparable<T>> FilterPredicate visit(NotEq<T> notEq) {
+ return notEq;
+ }
+
+ @Override
+ public <T extends Comparable<T>> FilterPredicate visit(Lt<T> lt) {
+ return lt;
+ }
+
+ @Override
+ public <T extends Comparable<T>> FilterPredicate visit(LtEq<T> ltEq) {
+ return ltEq;
+ }
+
+ @Override
+ public <T extends Comparable<T>> FilterPredicate visit(Gt<T> gt) {
+ return gt;
+ }
+
+ @Override
+ public <T extends Comparable<T>> FilterPredicate visit(GtEq<T> gtEq) {
+ return gtEq;
+ }
+
+ @Override
+ public <T extends Comparable<T>> FilterPredicate visit(In<T> in) {
+ return in;
+ }
+
+ @Override
+ public <T extends Comparable<T>> FilterPredicate visit(NotIn<T> notIn) {
+ return notIn;
+ }
+
+ @Override
+ public <T extends Comparable<T>> FilterPredicate visit(Contains<T> contains)
{
+ return contains;
+ }
+
+ @Override
+ public FilterPredicate visit(And and) {
+ final FilterPredicate left;
+ if (and.getLeft() instanceof And) {
+ left = visit((And) and.getLeft());
+ } else if (and.getLeft() instanceof Or) {
+ left = visit((Or) and.getLeft());
+ } else if (and.getLeft() instanceof Contains) {
+ left = and.getLeft();
+ } else {
+ return and;
+ }
+
+ final FilterPredicate right;
+ if (and.getRight() instanceof And) {
+ right = visit((And) and.getRight());
+ } else if (and.getRight() instanceof Or) {
+ right = visit((Or) and.getRight());
+ } else if (and.getRight() instanceof Contains) {
+ right = and.getRight();
+ } else {
+ return and;
+ }
+
+ if (left instanceof Contains) {
+ if (!(right instanceof Contains)) {
+ throw new UnsupportedOperationException(
+ "Contains predicates cannot be composed with non-Contains
predicates");
+ }
+ return ((Contains) left).and(right);
+ } else {
+ return and;
+ }
+ }
+
+ @Override
+ public FilterPredicate visit(Or or) {
+ final FilterPredicate left;
+ if (or.getLeft() instanceof And) {
+ left = visit((And) or.getLeft());
+ } else if (or.getLeft() instanceof Or) {
+ left = visit((Or) or.getLeft());
+ } else if (or.getLeft() instanceof Contains) {
+ left = or.getLeft();
+ } else {
+ return or;
+ }
+
+ final FilterPredicate right;
+ if (or.getRight() instanceof And) {
+ right = visit((And) or.getRight());
+ } else if (or.getRight() instanceof Or) {
+ right = visit((Or) or.getRight());
+ } else if (or.getRight() instanceof Contains) {
+ right = or.getRight();
+ } else {
+ return or;
+ }
+
+ if (left instanceof Contains) {
+ if (!(right instanceof Contains)) {
+ throw new UnsupportedOperationException(
+ "Contains predicates cannot be composed with non-Contains
predicates");
+ }
+ return ((Contains) left).or(right);
+ } else {
+ return or;
+ }
+ }
+
+ @Override
+ public FilterPredicate visit(Not not) {
+ return not;
Review Comment:
I'm not sure if we can safely throw here as `LogicalInverseRewriter` is (and
should be) called before any other rewriter.
##########
parquet-column/src/main/java/org/apache/parquet/internal/column/columnindex/ColumnIndexBuilder.java:
##########
@@ -368,6 +369,20 @@ public <T extends Comparable<T>> PrimitiveIterator.OfInt
visit(NotIn<T> notIn) {
return IndexIterator.all(getPageCount());
}
+ @Override
+ public <T extends Comparable<T>> PrimitiveIterator.OfInt visit(Contains<T>
contains) {
Review Comment:
CMIW, throwing exception here might prohibit `contains` predicate to be used
to filter parquet files with page index available.
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