Github user hbdeshmukh commented on a diff in the pull request:
https://github.com/apache/incubator-quickstep/pull/99#discussion_r77946830
--- Diff: relational_operators/TextScanOperator.cpp ---
@@ -91,6 +91,12 @@ bool TextScanOperator::getAllWorkOrders(
if (blocking_dependencies_met_ && !work_generated_) {
for (const std::string &file : files) {
// Use standard C libary to retrieve the file size.
+
+ // Check file permissions before trying to open it
+ int rval = access(file.c_str(), R_OK);
--- End diff --
Hi @tarunbansal - This is a neat change.
The ``access`` function may not be available on all the platforms that are
used in Quickstep. On unix, it comes from the header ``unistd.h``.
To solve such issues, typically we check the availability of this header
file using CMake. If the function is available, we create a variable, e.g. in
this case it could be QUICKSTEP_HAVE_UNISTD and guard this line with ``#ifdef
QUICKSTEP_HAVE_UNISTD`` and ``#endif QUICKSTEP_HAVE_UNISTD``. You can dig
around in the code to find such usage patterns.
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