mysql_stmt_field_count()

include/mysql.h:
  mysql_stmt_field_count() declaration
libmysql/libmysql.c:
  added mysql_stmt_field_count(): 
  we need this function to ease use of mysql_stmt_result_metadata:
  if mysql_stmt_field_count() != 0 mysql_stmt_result_metadata fails
  only if OOM.
libmysql/libmysql.def:
  declaration for mysql_stmt_field_count()

include/mysql.h

@@ -710,6 +710,7 @@ void STDCALL mysql_stmt_data_seek(MYSQL_STMT *stmt, my_ulonglong offset);
 my_ulonglong STDCALL mysql_stmt_num_rows(MYSQL_STMT *stmt);
 my_ulonglong STDCALL mysql_stmt_affected_rows(MYSQL_STMT *stmt);
 my_ulonglong STDCALL mysql_stmt_insert_id(MYSQL_STMT *stmt);
+unsigned int STDCALL mysql_stmt_field_count(MYSQL_STMT *stmt);
 
 my_bool STDCALL mysql_commit(MYSQL * mysql);
 my_bool STDCALL mysql_rollback(MYSQL * mysql);

libmysql/libmysql.c

@@ -2598,6 +2598,16 @@ my_ulonglong STDCALL mysql_stmt_affected_rows(MYSQL_STMT *stmt)
 }
 
 
+/*
+  Returns the number of result columns for the most recent query
+  run on this statement.
+*/
+
+unsigned int STDCALL mysql_stmt_field_count(MYSQL_STMT *stmt)
+{
+  return stmt->field_count;
+}
+
 /*
   Return last inserted id for auto_increment columns
 */

libmysql/libmysql.def

@@ -131,3 +131,4 @@ EXPORTS
 	mysql_stmt_insert_id
         mysql_stmt_attr_get
         mysql_stmt_attr_set
+	mysql_stmt_field_count

tests/client_test.c

@@ -6284,6 +6284,7 @@ static void test_field_misc()
 
   result= mysql_stmt_result_metadata(stmt);
   mytest(result);
+  assert(mysql_stmt_field_count(stmt) == mysql_num_fields(result));
 
   rc= mysql_stmt_execute(stmt);
   check_execute(stmt, rc);