Fix compile error for the flash bc algorithm on ubuntu (#2839)

## What do these changes do?

Some compilers were failing to match the most suitable overloaded
functions when `EjoinV` is used in the FLASH model , causing unexpected
errors. So I add an extra parameter to force the compiler to use the
required overloaded function.
This change is intended to ensure that the function is correctly matched
by the compiler and that the program runs correctly.

Fixes #2835

Co-authored-by: Weibin Zeng <qiaozi.zwb@alibaba-inc.com>

analytical_engine/apps/flash/api.h

@@ -142,7 +142,8 @@ template <typename fragment_t, typename fw_t, typename value_t, class F,
           class M, class C>
 VSet edgeMapDenseFunction(const fragment_t& graph,
                           const std::shared_ptr<fw_t> fw, VSet& U, int h,
-                          VSet& T, F& f, M& m, C& c, bool b = true) {
+                          VSet& T, bool is_join, F& f, M& m, C& c,
+                          bool b = true) {
   if ((&T) == (&All))
     return edgeMapDenseFunction(graph, fw, U, h, f, m, c, b);
   using vertex_t = typename fragment_t::vertex_t;
@@ -219,7 +220,8 @@ template <typename fragment_t, typename fw_t, typename value_t, class F,
           class M, class C, class H>
 VSet edgeMapDenseFunction(const fragment_t& graph,
                           const std::shared_ptr<fw_t> fw, VSet& U, H& h,
-                          VSet& T, F& f, M& m, C& c, bool b = true) {
+                          VSet& T, bool is_join, F& f, M& m, C& c,
+                          bool b = true) {
   using vid_t = typename fragment_t::vid_t;
   using edata_t = typename fragment_t::edata_t;
   bool flag = ((&U) == (&All));
@@ -381,8 +383,9 @@ template <typename fragment_t, typename fw_t, typename value_t, class F,
           class M, class C, class H>
 inline VSet edgeMapFunction(const fragment_t& graph,
                             const std::shared_ptr<fw_t> fw, VSet& U, H h,
-                            VSet& T, F& f, M& m, C& c, bool b = true) {
-  return edgeMapDenseFunction(graph, fw, U, h, T, f, m, c, b);
+                            VSet& T, bool is_join, F& f, M& m, C& c,
+                            bool b = true) {
+  return edgeMapDenseFunction(graph, fw, U, h, T, is_join, f, m, c, b);
 }
 
 template <typename fragment_t, typename fw_t>

analytical_engine/apps/flash/flash_utils.h

@@ -110,7 +110,7 @@ namespace gs {
 #define CTrueV cTrueV<vid_t, value_t>
 #define CTrueE cTrueE<vid_t, value_t, edata_t>
 
-#define EjoinV(E, V) E, V
+#define EjoinV(E, V) E, V, true
 #define VjoinP(property)     \
   std::vector<vid_t> res;    \
   res.clear();               \