Fix for #2208 (multi-query returns wrong result in embedded library)

now we execute only one first select during mysql_real_query
others - during 'mysql_next_result'


include/mysql.h:
  'virtual' next_result added
libmysql/client_settings.h:
  cli_next_result declaration added
libmysql/libmysql.c:
  mysql_next_result now works in embedded library as well
libmysqld/lib_sql.cc:
  emb_next_result implemented
sql/sql_class.h:
  fields to store the rest of the query added
sql/sql_parse.cc:
  Saving the rest of the query added for embedded case

1 files changed, 19 insertions, 1 deletions

diff --git a/libmysqld/lib_sql.cc b/libmysqld/lib_sql.cc
index e36e878d4b1..81235ce0c22 100644
--- a/libmysqld/lib_sql.cc
+++ b/libmysqld/lib_sql.cc
@@ -245,6 +245,18 @@ static MYSQL_RES * emb_mysql_store_result(MYSQL *mysql)
   return mysql_store_result(mysql);
 }
 
+int emb_next_result(MYSQL *mysql)
+{
+  THD *thd= (THD*)mysql->thd;
+  DBUG_ENTER("emb_next_result");
+
+  if (emb_advanced_command(mysql, COM_QUERY,0,0,
+			   thd->query_rest,thd->query_rest_length,1)
+      || emb_mysql_read_query_result(mysql))
+    DBUG_RETURN(1);
+
+  DBUG_RETURN(0);				/* No more results */
+}
 
 MYSQL_METHODS embedded_methods= 
 {
@@ -259,7 +271,8 @@ MYSQL_METHODS embedded_methods=
   emb_read_binary_rows,
   emb_unbuffered_fetch,
   emb_free_embedded_thd,
-  emb_read_statistic
+  emb_read_statistic,
+  emb_next_result
 };
 
 C_MODE_END
@@ -749,6 +762,11 @@ bool Protocol::net_store_data(const char *from, uint length)
   return false;
 }
 
+char *memdup_mysql(struct st_mysql *mysql, const char*data, int length)
+{
+  return memdup_root(&mysql->field_alloc, data, length);
+}
+
 #if 0
 /* The same as Protocol::net_store_data but does the converstion
 */