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https://issues.apache.org/jira/browse/DRILL-5657?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16257401#comment-16257401
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ASF GitHub Bot commented on DRILL-5657:
---------------------------------------
Github user bitblender commented on a diff in the pull request:
https://github.com/apache/drill/pull/914#discussion_r151762286
--- Diff: exec/memory/base/src/main/java/io/netty/buffer/DrillBuf.java ---
@@ -882,4 +882,71 @@ public void print(StringBuilder sb, int indent,
Verbosity verbosity) {
}
}
+ // The "unsafe" methods are for use ONLY by code that does its own
+ // bounds checking. They are called "unsafe" for a reason: they will
crash
+ // the JVM if values are addressed out of bounds.
+
+ /**
+ * Write an integer to the buffer at the given byte index, without
+ * bounds checks.
+ *
+ * @param index byte (not int) index of the location to write
+ * @param value the value to write
+ */
+
+ public void unsafePutInt(int index, int value) {
--- End diff --
The first argument in these unsafePutXXX methods is an offset right? Should
the 'index' be changed to an 'offset' ?
> Implement size-aware result set loader
> --------------------------------------
>
> Key: DRILL-5657
> URL: https://issues.apache.org/jira/browse/DRILL-5657
> Project: Apache Drill
> Issue Type: Improvement
> Affects Versions: Future
> Reporter: Paul Rogers
> Assignee: Paul Rogers
> Fix For: Future
>
>
> A recent extension to Drill's set of test tools created a "row set"
> abstraction to allow us to create, and verify, record batches with very few
> lines of code. Part of this work involved creating a set of "column
> accessors" in the vector subsystem. Column readers provide a uniform API to
> obtain data from columns (vectors), while column writers provide a uniform
> writing interface.
> DRILL-5211 discusses a set of changes to limit value vectors to 16 MB in size
> (to avoid memory fragmentation due to Drill's two memory allocators.) The
> column accessors have proven to be so useful that they will be the basis for
> the new, size-aware writers used by Drill's record readers.
> A step in that direction is to retrofit the column writers to use the
> size-aware {{setScalar()}} and {{setArray()}} methods introduced in
> DRILL-5517.
> Since the test framework row set classes are (at present) the only consumer
> of the accessors, those classes must also be updated with the changes.
> This then allows us to add a new "row mutator" class that handles size-aware
> vector writing, including the case in which a vector fills in the middle of a
> row.
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