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https://issues.apache.org/jira/browse/DRILL-6174?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16378493#comment-16378493
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ASF GitHub Bot commented on DRILL-6174:
---------------------------------------

Github user arina-ielchiieva commented on a diff in the pull request:

    https://github.com/apache/drill/pull/1131#discussion_r170902942
  
    --- Diff: 
exec/java-exec/src/main/java/org/apache/drill/exec/expr/stat/ParquetPredicatesHelper.java
 ---
    @@ -0,0 +1,36 @@
    +/*
    + * 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
    + * <p/>
    + * http://www.apache.org/licenses/LICENSE-2.0
    + * <p/>
    + * 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.drill.exec.expr.stat;
    +
    +import org.apache.parquet.column.statistics.Statistics;
    +
    +class ParquetPredicatesHelper {
    --- End diff --
    
    Please make public and add java doc for each helper method.


> Parquet pushdown planning improvements
> --------------------------------------
>
>                 Key: DRILL-6174
>                 URL: https://issues.apache.org/jira/browse/DRILL-6174
>             Project: Apache Drill
>          Issue Type: Improvement
>    Affects Versions: 1.12.0
>            Reporter: Arina Ielchiieva
>            Assignee: Roman Kulyk
>            Priority: Major
>              Labels: doc-impacting
>             Fix For: 1.13.0
>
>
> Currently parquet pushdown planning has certain limitations 
> (https://drill.apache.org/docs/parquet-filter-pushdown/). This Jira aims to 
> fix some of them. List of improvements can be find below:
> 1. IS [NOT] NULL / TRUE / FALSE
> 2. Timestamp / date / time implicit / explicit casts
> {noformat}
> timestamp -> date
> timestamp -> varchar
> date -> timestamp
> date -> varchar
> time -> timestamp
> time -> date
> time -> varchar
> {noformat}



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