Github user DaveBirdsall commented on a diff in the pull request:
https://github.com/apache/trafodion/pull/1439#discussion_r166401395
--- Diff: core/sql/exp/exp_function.cpp ---
@@ -6503,8 +6503,15 @@ ex_expr::exp_return_type
ex_function_json_object_field_text::eval(char *op_data[
Int32 prec2 = ((SimpleType *)getOperand(2))->getPrecision();
len2 = Attributes::trimFillerSpaces( op_data[2], prec2, len2, cs );
}
+
char *rltStr = NULL;
- JsonReturnType ret = json_extract_path_text(&rltStr, op_data[1], 1,
op_data[2]);
+ char *jsonStr = new(heap) char[len1+1];
+ char *jsonAttr = new(heap) char[len2+1];
--- End diff --
Here's an example. Compile this program:
// Demonstrate dynamically-sized arrays on C++ stack
#include <iostream>
using namespace std;
int main(int argc, char * argv[])
{
for (size_t i = 5; i < 10; i++)
{
char temp[i+1];
cout << "sizeof(temp) = " << sizeof(temp) << endl;
}
return 0;
}
When you run it, you'll get this output:
[birdsall@edev08 dynChar]$ ./dynChar.exe
sizeof(temp) = 6
sizeof(temp) = 7
sizeof(temp) = 8
sizeof(temp) = 9
sizeof(temp) = 10
[birdsall@edev08 dynChar]$
---
