Github user zuyu commented on a diff in the pull request:
https://github.com/apache/incubator-quickstep/pull/99#discussion_r78285930
--- Diff: relational_operators/TextScanOperator.cpp ---
@@ -91,6 +91,15 @@ 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
+ #ifdef QUICKSTEP_HAVE_UNISTD
--- End diff --
Hi @tarunbansal Welcome to the team, and please get familiar with our code
style at
https://cwiki.apache.org/confluence/display/QUICKSTEP/Quickstep+Coding+Standards.
Also, I noticed that you made the file mode from `644` to `755`. Please
revert this change first.
Finally, I would have written the code as following:
```
// Add in Line 21.
#include "relational_operators/RelationalConfig.h" // For
QUICKSTEP_HAVE_UNISTD.
#ifdef QUICKSTEP_HAVE_UNISTD
#include <unistd.h>
#endif // QUICKSTEP_HAVE_UNISTD
// Start from Line 95.
#ifdef QUICKSTEP_HAVE_UNISTD
// Check file permissions before trying to open it.
const int access_result = access(file.c_str(), R_OK);
CHECK_EQ(0, access_result)
<< "File " << file << " is not readable due to permission
issues.";
#endif // QUICKSTEP_HAVE_UNISTD
```
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