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From paul-rogers <...@git.apache.org>
Subject [GitHub] drill pull request #909: DRILL-4264: Allow field names to include dots
Date Sat, 19 Aug 2017 19:24:00 GMT
Github user paul-rogers commented on a diff in the pull request:

    --- Diff: exec/java-exec/src/main/java/org/apache/drill/exec/vector/complex/SchemaPathUtil.java
    @@ -0,0 +1,59 @@
    +* 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.drill.exec.vector.complex;
    +import org.apache.drill.common.expression.PathSegment;
    +import org.apache.drill.common.expression.SchemaPath;
    +import org.apache.drill.common.types.TypeProtos;
    +import org.apache.drill.common.types.Types;
    +import org.apache.drill.exec.record.MaterializedField;
    +public class SchemaPathUtil {
    --- End diff --
    Can these simply be static methods on Materialized Field? Can just call the method `create()`
since the argument signatures will make the methods unique.
    `SchemaPath` is defined in `common`, which is visible to `vector`, so it is fine for `MaterializedField`
to have visibility to `SchemaPath`.
    We would want to make clear that the `MaterializedField` is always for the tail member
of `SchemaPath`. (Or is it? A schema path can refer to an array element...)
    If we have a name `a.b.c.d`, would we have need to create maps (or repeated maps) for
`a`, `b`, and `c`, then to create and Int, say, for `d`? Or, is the context such that we aways
have a context so that `b` is always in the context of `a`, etc.?

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