Galera after-merge fixes

wsrep_drop_table_query(): Remove the definition of this ununsed function.

row_upd_sec_index_entry(), row_upd_clust_rec_by_insert():
Evaluate the simplest conditions first. The merge could have slightly
hurt performance by causing extra calls to wsrep_on().

sql/wsrep_mysqld.cc

@@ -1362,64 +1362,6 @@ create_view_query(THD *thd, uchar** buf, size_t* buf_len)
 static int wsrep_create_sp(THD *thd, uchar** buf, size_t* buf_len);
 static int wsrep_create_trigger_query(THD *thd, uchar** buf, size_t* buf_len);
 
-/*
-  Rewrite DROP TABLE for TOI. Temporary tables are eliminated from
-  the query as they are visible only to client connection.
-
-  TODO: See comments for sql_base.cc:drop_temporary_table() and refine
-  the function to deal with transactional locked tables.
- */
-static int wsrep_drop_table_query(THD* thd, uchar** buf, size_t* buf_len)
-{
-
-  LEX* lex= thd->lex;
-  SELECT_LEX* select_lex= &lex->select_lex;
-  TABLE_LIST* first_table= select_lex->table_list.first;
-  String buff;
-
-  bool found_temp_table= false;
-  for (TABLE_LIST* table= first_table; table; table= table->next_global)
-  {
-    if (find_temporary_table(thd, table->db, table->table_name))
-    {
-      found_temp_table= true;
-      break;
-    }
-  }
-
-  if (found_temp_table)
-  {
-    buff.append("DROP TABLE ");
-    if (lex->check_exists)
-      buff.append("IF EXISTS ");
-
-    for (TABLE_LIST* table= first_table; table; table= table->next_global)
-    {
-      if (!find_temporary_table(thd, table->db, table->table_name))
-      {
-        append_identifier(thd, &buff, table->db, strlen(table->db));
-        buff.append(".");
-        append_identifier(thd, &buff, table->table_name,
-                          strlen(table->table_name));
-        buff.append(",");
-      }
-    }
-
-    /* Chop the last comma */
-    buff.chop();
-    buff.append(" /* generated by wsrep */");
-
-    WSREP_DEBUG("Rewrote '%s' as '%s'", thd->query(), buff.ptr());
-
-    return wsrep_to_buf_helper(thd, buff.ptr(), buff.length(), buf, buf_len);
-  }
-  else
-  {
-    return wsrep_to_buf_helper(thd, thd->query(), thd->query_length(),
-                               buf, buf_len);
-  }
-}
-
 /*
   Decide if statement should run in TOI.
 

storage/innobase/row/row0upd.cc

@@ -1982,9 +1982,9 @@ row_upd_sec_index_entry(
 					index, offsets, thr, &mtr);
 			}
 #ifdef WITH_WSREP
-			if (wsrep_on(trx->mysql_thd)                          &&
+			if (err == DB_SUCCESS && !referenced                  &&
+			    wsrep_on(trx->mysql_thd)                          &&
 			    !wsrep_thd_is_BF(trx->mysql_thd, FALSE)           &&
-			    err == DB_SUCCESS && !referenced                  &&
 			    !(parent && que_node_get_type(parent) ==
 				QUE_NODE_UPDATE                               &&
 			      ((upd_node_t*)parent)->cascade_node == node)    &&
@@ -2270,7 +2270,7 @@ row_upd_clust_rec_by_insert(
 			}
 		}
 #ifdef WITH_WSREP
-		if (wsrep_on(trx->mysql_thd) && !referenced                  &&
+		if (!referenced && wsrep_on(trx->mysql_thd)                  &&
 		    !(parent && que_node_get_type(parent) == QUE_NODE_UPDATE &&
 		      ((upd_node_t*)parent)->cascade_node == node)           &&
 		    foreign

storage/xtradb/row/row0upd.cc

@@ -1988,9 +1988,9 @@ row_upd_sec_index_entry(
 					index, offsets, thr, &mtr);
 			}
 #ifdef WITH_WSREP
-			if (wsrep_on(trx->mysql_thd)                          &&
+			if (err == DB_SUCCESS && !referenced                  &&
+			    wsrep_on(trx->mysql_thd)                          &&
 			    !wsrep_thd_is_BF(trx->mysql_thd, FALSE)           &&
-			    err == DB_SUCCESS && !referenced                  &&
 			    !(parent && que_node_get_type(parent) ==
 				QUE_NODE_UPDATE                               &&
 			      ((upd_node_t*)parent)->cascade_node == node)    &&
@@ -2279,7 +2279,7 @@ row_upd_clust_rec_by_insert(
 			}
 		}
 #ifdef WITH_WSREP
-		if (wsrep_on(trx->mysql_thd) && !referenced                  &&
+		if (!referenced && wsrep_on(trx->mysql_thd)                  &&
 		    !(parent && que_node_get_type(parent) == QUE_NODE_UPDATE &&
 		      ((upd_node_t*)parent)->cascade_node == node)           &&
 		    foreign