Fix -Wunused for CMAKE_BUILD_TYPE=RelWithDebInfo

For release builds, do not declare unused variables.

unpack_row(): Omit a debug-only variable from WSREP diagnostic message.

create_wsrep_THD(): Fix -Wmaybe-uninitialized for the PSI_thread_key.

sql/mysqld.cc

@@ -1186,12 +1186,9 @@ PSI_statement_info stmt_info_new_packet;
 #endif
 
 #ifndef EMBEDDED_LIBRARY
-void net_before_header_psi(struct st_net *net, void *user_data, size_t /* unused: count */)
+void net_before_header_psi(struct st_net *net, void *thd, size_t /* unused: count */)
 {
-  THD *thd;
-  thd= static_cast<THD*> (user_data);
-  DBUG_ASSERT(thd != NULL);
-
+  DBUG_ASSERT(thd);
   /*
     We only come where when the server is IDLE, waiting for the next command.
     Technically, it is a wait on a socket, which may take a long time,
@@ -1200,7 +1197,8 @@ void net_before_header_psi(struct st_net *net, void *user_data, size_t /* unused
     Instead, start explicitly an IDLE event.
   */
   MYSQL_SOCKET_SET_STATE(net->vio->mysql_socket, PSI_SOCKET_STATE_IDLE);
-  MYSQL_START_IDLE_WAIT(thd->m_idle_psi, &thd->m_idle_state);
+  MYSQL_START_IDLE_WAIT(static_cast<THD*>(thd)->m_idle_psi,
+                        &static_cast<THD*>(thd)->m_idle_state);
 }
 
 void net_after_header_psi(struct st_net *net, void *user_data,

sql/rpl_record.cc

 /* Copyright (c) 2007, 2013, Oracle and/or its affiliates.
-   Copyright (c) 2008, 2014, SkySQL Ab.
+   Copyright (c) 2008, 2019, MariaDB Corporation.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -318,7 +318,7 @@ unpack_row(rpl_group_info *rgi,
           normal unpack operation.
         */
         uint16 const metadata= tabledef->field_metadata(i);
-        uchar const *const old_pack_ptr= pack_ptr;
+        IF_DBUG(uchar const *const old_pack_ptr= pack_ptr;,)
 
         pack_ptr= f->unpack(f->ptr, pack_ptr, row_end, metadata);
 	DBUG_PRINT("debug", ("field: %s; metadata: 0x%x;"
@@ -336,10 +336,9 @@ unpack_row(rpl_group_info *rgi,
               Galera Node throws "Could not read field" error and drops out of cluster
             */
             WSREP_WARN("ROW event unpack field: %s  metadata: 0x%x;"
-                       " pack_ptr: %p; conv_table %p conv_field %p table %s"
+                       " conv_table %p conv_field %p table %s"
                        " row_end: %p",
-                       f->field_name, metadata,
-                       old_pack_ptr, conv_table, conv_field,
+                       f->field_name, metadata, conv_table, conv_field,
                        (table_found) ? "found" : "not found", row_end
             );
 	  }

sql/sql_parse.cc

@@ -8405,9 +8405,9 @@ bool st_select_lex::add_cross_joined_table(TABLE_LIST *left_op,
 
   TABLE_LIST *tbl;
   List<TABLE_LIST> *right_op_jl= right_op->join_list;
-  TABLE_LIST *r_tbl= right_op_jl->pop();
+  IF_DBUG(const TABLE_LIST *r_tbl=,) right_op_jl->pop();
   DBUG_ASSERT(right_op == r_tbl);
-  TABLE_LIST *l_tbl= right_op_jl->pop();
+  IF_DBUG(const TABLE_LIST *l_tbl=,) right_op_jl->pop();
   DBUG_ASSERT(left_op == l_tbl);
   TABLE_LIST *cj_nest;
 

sql/sql_partition_admin.cc

@@ -60,7 +60,7 @@ bool Sql_cmd_alter_table_exchange_partition::execute(THD *thd)
     referenced from this structure will be modified.
     @todo move these into constructor...
   */
-  HA_CREATE_INFO create_info(lex->create_info);
+  IF_DBUG(HA_CREATE_INFO create_info(lex->create_info);,)
   Alter_info alter_info(lex->alter_info, thd->mem_root);
   ulong priv_needed= ALTER_ACL | DROP_ACL | INSERT_ACL | CREATE_ACL;
 

sql/sql_table.cc

@@ -10606,10 +10606,10 @@ bool Sql_cmd_create_table::execute(THD *thd)
 {
   DBUG_ENTER("Sql_cmd_create_table::execute");
   LEX *lex= thd->lex;
-  TABLE_LIST *all_tables= lex->query_tables;
   SELECT_LEX *select_lex= &lex->select_lex;
   TABLE_LIST *first_table= select_lex->table_list.first;
-  DBUG_ASSERT(first_table == all_tables && first_table != 0);
+  DBUG_ASSERT(first_table == lex->query_tables);
+  DBUG_ASSERT(first_table != 0);
   bool link_to_local;
   TABLE_LIST *create_table= first_table;
   TABLE_LIST *select_tables= lex->create_last_non_select_table->next_global;

sql/sys_vars.ic

 /* Copyright (c) 2002, 2011, Oracle and/or its affiliates.
-   Copyright (c) 2010, 2013, Monty Program Ab.
+   Copyright (c) 2010, 2019, MariaDB Corporation.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -629,7 +629,7 @@ public:
      /* parse and feel list with default values */
      if (thd)
      {
-       bool res=
+       IF_DBUG(bool res=,)
          sysvartrack_validate_value(thd,
                                     var->save_result.string_value.str,
                                     var->save_result.string_value.length);

sql/wsrep_thd.cc

@@ -420,25 +420,12 @@ static bool create_wsrep_THD(wsrep_thread_args* args)
 {
   mysql_mutex_lock(&LOCK_thread_count);
   ulong old_wsrep_running_threads= wsrep_running_threads;
-#ifdef HAVE_PSI_THREAD_INTERFACE
-  PSI_thread_key key;
-
-  switch (args->thread_type)
-  {
-    case WSREP_APPLIER_THREAD:
-      key= key_wsrep_applier;
-      break;
-    case WSREP_ROLLBACKER_THREAD:
-      key= key_wsrep_rollbacker;
-      break;
-    default:
-      assert(0);
-      break;
-  }
-#endif
-
-  bool res= mysql_thread_create(key, &args->thread_id, &connection_attrib, start_wsrep_THD,
-                           (void*)args);
+  DBUG_ASSERT(args->thread_type == WSREP_APPLIER_THREAD ||
+              args->thread_type == WSREP_ROLLBACKER_THREAD);
+  bool res= mysql_thread_create(args->thread_type == WSREP_APPLIER_THREAD
+                                ? key_wsrep_applier : key_wsrep_rollbacker,
+                                &args->thread_id, &connection_attrib,
+                                start_wsrep_THD, (void*)args);
   /*
     if starting a thread on server startup, wait until the this thread's THD
     is fully initialized (otherwise a THD initialization code might

storage/innobase/fil/fil0crypt.cc

@@ -2308,8 +2308,8 @@ static void fil_crypt_rotation_list_fill()
 			/* Protect the tablespace while we may
 			release fil_system->mutex. */
 			space->n_pending_ops++;
-			fil_space_t* s= fil_system->read_page0(
-				space->id);
+			ut_d(const fil_space_t* s=)
+				fil_system->read_page0(space->id);
 			ut_ad(!s || s == space);
 			space->n_pending_ops--;
 			if (!space->size) {