Github user squito commented on a diff in the pull request:

    https://github.com/apache/spark/pull/6627#discussion_r32068173
  
    --- Diff: 
sql/hive/src/main/scala/org/apache/spark/sql/hive/client/package.scala ---
    @@ -19,15 +19,27 @@ package org.apache.spark.sql.hive
     
     /** Support for interacting with different versions of the 
HiveMetastoreClient */
     package object client {
    -  private[client] abstract class HiveVersion(val fullVersion: String, val 
hasBuiltinsJar: Boolean)
    +  private[client] abstract class HiveVersion(
    +      val fullVersion: String,
    +      val extraDeps: Seq[String] = Nil,
    +      val exclusions: Seq[String] = Nil)
     
       // scalastyle:off
       private[client] object hive {
    -    case object v10 extends HiveVersion("0.10.0", true)
    -    case object v11 extends HiveVersion("0.11.0", false)
    -    case object v12 extends HiveVersion("0.12.0", false)
    -    case object v13 extends HiveVersion("0.13.1", false)
    +    case object v12 extends HiveVersion("0.12.0")
    +    case object v13 extends HiveVersion("0.13.1")
    +
    +    // Hive 0.14 depends on calcite 0.9.2-incubating-SNAPSHOT which does 
not exist in
    +    // maven central anymore, so override those with a version that exists.
    +    //
    +    // org.pentaho:pentaho-aggdesigner-algorithm is also nowhere to be 
found, so exclude
    +    // it explicitly. If it's needed by the metastore client, users will 
have to dig it
    +    // out of somewhere and use configuration to point Spark at the 
correct jars.
    --- End diff --
    
    this comment is kinda scary ... do we need to document this somewhere?  
though I'm not sure what the appropriate place would be


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