Github user jacques-n commented on a diff in the pull request:
https://github.com/apache/drill/pull/140#discussion_r38386305
--- Diff:
exec/java-exec/src/main/java/org/apache/drill/exec/store/dfs/WorkspaceSchemaFactory.java
---
@@ -321,8 +327,101 @@ public DrillTable create(String key) {
return null;
}
+ private FormatMatcher findMatcher(FileStatus file) {
+ FormatMatcher matcher = null;
+ try {
+ for (FormatMatcher m : dropFileMatchers) {
+ if (m.isFileReadable(fs, file)) {
+ return m;
+ }
+ }
+ } catch (IOException e) {
+ logger.debug("Failed to find format matcher for file: %s", file,
e);
+ }
+ return matcher;
+ }
+
@Override
public void destroy(DrillTable value) {
}
+
+ /**
+ * Check if the table contains homogenenous files that can be read by
Drill. Eg: parquet, json csv etc.
+ * However if it contains more than one of these formats or a totally
different file format that Drill cannot
+ * understand then we will raise an exception.
+ * @param key
+ * @return
+ * @throws IOException
+ */
+ private boolean isHomogeneous(String key) throws IOException {
--- End diff --
Why would we only check isHomogeneous for drop and not for query? Thoughts
here?
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