Provide a show_create_table_ex() function

It is like show_create_table() but allows the caller to specify the
database_name and table_name which are to be printed.

sql/sql_show.cc

@@ -1976,6 +1976,14 @@ static void append_period(THD *thd, String *packet, const LEX_CSTRING &start,
   packet->append(STRING_WITH_LEN(")"));
 }
 
+int show_create_table(THD *thd, TABLE_LIST *table_list, String *packet,
+                      Table_specification_st *create_info_arg,
+                      enum_with_db_name with_db_name)
+{
+  return show_create_table_ex(thd, table_list, NULL, NULL, packet,
+                              create_info_arg, with_db_name);
+}
+
 /*
   Build a CREATE TABLE statement for a table.
 
@@ -1984,6 +1992,11 @@ static void append_period(THD *thd, String *packet, const LEX_CSTRING &start,
     thd               The thread
     table_list        A list containing one table to write statement
                       for.
+    force_db          If not NULL, database name to use in the CREATE
+                      TABLE statement.
+    force_name        If not NULL, table name to use in the CREATE TABLE
+                      statement. if NULL, the name from table_list will be
+                      used.
     packet            Pointer to a string where statement will be
                       written.
     create_info_arg   Pointer to create information that can be used
@@ -2000,7 +2013,9 @@ static void append_period(THD *thd, String *packet, const LEX_CSTRING &start,
     0       OK
  */
 
-int show_create_table(THD *thd, TABLE_LIST *table_list, String *packet,
+int show_create_table_ex(THD *thd, TABLE_LIST *table_list,
+                         const char *force_db, const char *force_name,
+                         String *packet,
                          Table_specification_st *create_info_arg,
                          enum_with_db_name with_db_name)
 {
@@ -2052,6 +2067,18 @@ int show_create_table(THD *thd, TABLE_LIST *table_list, String *packet,
   packet->append(STRING_WITH_LEN("TABLE "));
   if (create_info_arg && create_info_arg->if_not_exists())
     packet->append(STRING_WITH_LEN("IF NOT EXISTS "));
+
+  if (force_name)
+  {
+    if (force_db)
+    {
+      append_identifier(thd, packet, force_db, strlen(force_db));
+      packet->append(STRING_WITH_LEN("."));
+    }
+    append_identifier(thd, packet, force_name, strlen(force_name));
+  }
+  else
+  {
     if (table_list->schema_table)
     {
       alias.str= table_list->schema_table->table_name;
@@ -2087,6 +2114,8 @@ int show_create_table(THD *thd, TABLE_LIST *table_list, String *packet,
     }
 
     append_identifier(thd, packet, &alias);
+  }
+
   packet->append(STRING_WITH_LEN(" (\n"));
   /*
     We need this to get default values from the table

sql/sql_show.h

@@ -83,6 +83,12 @@ int show_create_table(THD *thd, TABLE_LIST *table_list, String *packet,
                       Table_specification_st *create_info_arg,
                       enum_with_db_name with_db_name);
 
+int show_create_table_ex(THD *thd, TABLE_LIST *table_list,
+                         const char * forced_db, const char *forced_name,
+                         String *packet,
+                         Table_specification_st *create_info_arg,
+                         enum_with_db_name with_db_name);
+
 int copy_event_to_schema_table(THD *thd, TABLE *sch_table, TABLE *event_table);
 
 bool append_identifier(THD *thd, String *packet, const char *name, size_t length);