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From vdiravka <...@git.apache.org>
Subject [GitHub] drill pull request #877: DRILL-5660: Drill 1.10 queries fail due to Parquet ...
Date Thu, 03 Aug 2017 19:22:54 GMT
Github user vdiravka commented on a diff in the pull request:

    https://github.com/apache/drill/pull/877#discussion_r131164453
  
    --- Diff: exec/java-exec/src/main/java/org/apache/drill/exec/store/parquet/MetadataVersions.java
---
    @@ -0,0 +1,86 @@
    +/*
    + * 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.store.parquet;
    +
    +import com.google.common.collect.ImmutableSortedSet;
    +import org.apache.drill.common.exceptions.DrillRuntimeException;
    +
    +import java.util.NavigableSet;
    +
    +/**
    + * Supported metadata versions.
    + * <p>
    + * String metadata version consists of the following characters:<br>
    + * optional "v" letter,<br>
    + * major metadata version (any number of digits),<br>
    + * optional "." delimiter (used if minor metadata version is specified),<br>
    + * minor metadata version (one digit number)
    + * <p>
    + * Note: keep them synchronized with {@link Metadata.ParquetTableMetadataBase} versions
    + */
    +public class MetadataVersions {
    +  /**
    +   * Version 1: Introduces parquet file metadata caching.<br>
    +   * See DRILL-2743
    +   */
    +  public static final String V1 = "v1";
    +  /**
    +   * Version 2: Metadata cache file size is reduced.<br>
    +   * See DRILL-4053
    +   */
    +  public static final String V2 = "v2";
    +  /**
    +   * Version 3: Difference between v3 and v2 : min/max, type_length, precision, scale,
repetitionLevel, definitionLevel.<br>
    +   * Filter pushdown for Parquet is implemented. <br>
    +   * See DRILL-1950
    +   */
    +  public static final String V3 = "v3";
    +  /**
    +   * Version 3.1: Absolute paths of files and directories are replaced with relative
ones. Metadata version value
    +   * doesn't contain `v` letter<br>
    +   * See DRILL-3867, DRILL-5660
    +   */
    +  public static final String V3_1 = "3.1";
    +
    +  /**
    +   * Helper method to parse string metadata version into float.
    +   *
    +   * @param stringVersion text metadata version
    +   * @return parsed Float metadata version
    +   */
    +  public static Float parseStringMetadataVersion(String stringVersion) {
    +    try {
    +      if (stringVersion.contains(".") && stringVersion.split("\\.")[1].length()
!= 1) {
    +        throw new DrillRuntimeException("Minor metadata version shouldn't be greater
than 9 or contain more than one digit");
    +      }
    +      return stringVersion.charAt(0) == 'v' ? Float.valueOf(stringVersion.substring(1))
: Float.valueOf(stringVersion);
    +    } catch (Exception e) {
    +      throw new DrillRuntimeException(String.format("Could not parse metadata version
'%s'", stringVersion), e);
    +    }
    +  }
    +
    +  /**
    +   * All historical versions of the Drill metadata cache files
    +   */
    +  public static final NavigableSet<Float> SUPPORTED_VERSIONS = ImmutableSortedSet.of(
    --- End diff --
    
    Done


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