Paul Rogers created DRILL-5930:
----------------------------------
Summary: Table function escape handling does not handle lone
backslash
Key: DRILL-5930
URL: https://issues.apache.org/jira/browse/DRILL-5930
Project: Apache Drill
Issue Type: Bug
Affects Versions: 1.11.0
Reporter: Paul Rogers
Assignee: Paul Rogers
Priority: Minor
Consider the following query from the test framework
({{Functional/table_function/positive/drill-3149_10.q}}):
{code}
select * from
table(`table_function/colons.txt`(type=>'text',lineDelimiter=>'\\'))
{code}
Notice the double-backslash. Drill translates this into a single backslash.
But, what happens if the user provides just a single backslash? Drill
translates that into the empty string. Drill passes the empty string to the
text reader, which fails with the error described in DRILL-5929.
Better would be to either:
* Leave lone back-slashes unchanged, or
* Fail a query with an lone backslash.
The fix for this bug prefers the first (because it is easiest.) However, this
fix does not handle a triple backslash, which will be translated to a single
backslash:
* \ \ --> \
* \ --> (nothing)
The code in question:
{code}
class FormatPluginOp ...
FormatPluginConfig createConfigForTable(TableInstance t) {
...
param = StringEscapeUtils.unescapeJava(param);
{code}
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)
