Bug #47459 Assertion in Diagnostics_area::set_eof_status on OPTIMIZE TABLE

This assertion could be triggered during execution of OPTIMIZE TABLE for
InnoDB tables. As part of optimize for InnoDB tables, the table is recreated
and then opened again. If the reopen failed for any reason, the assertion
would be triggered. This could for example be caused by a concurrent DROP
TABLE executed by a different connection. The reason for the assertion was
that any failures during reopening were ignored.

This patch fixes the problem by making sure that the result of reopening the
table is checked and that any error messages are sent to the client.

Test case added to innodb_mysql_sync.test.

mysql-test/r/innodb_mysql_sync.result

@@ -24,3 +24,27 @@ Warnings:
 Error	1030	Got error -1 from storage engine
 DROP TABLE t1;
 SET DEBUG_SYNC='RESET';
+#
+# Bug#47459 Assertion in Diagnostics_area::set_eof_status on
+#           OPTIMIZE TABLE
+#
+DROP TABLE IF EXISTS t1;
+CREATE TABLE t1(a INT) ENGINE= InnoDB;
+# Connection con1
+SET DEBUG_SYNC= "ha_admin_open_ltable SIGNAL opening WAIT_FOR dropped";
+# Sending:
+OPTIMIZE TABLE t1;
+# Connection default
+SET DEBUG_SYNC= "now WAIT_FOR opening";
+DROP TABLE t1;
+SET DEBUG_SYNC= "now SIGNAL dropped";
+# Connection con1
+# Reaping: OPTIMIZE TABLE t1
+Table	Op	Msg_type	Msg_text
+test.t1	optimize	note	Table does not support optimize, doing recreate + analyze instead
+test.t1	optimize	error	Table 'test.t1' doesn't exist
+test.t1	optimize	status	Operation failed
+Warnings:
+Error	1146	Table 'test.t1' doesn't exist
+# Connection default
+SET DEBUG_SYNC= "RESET";

mysql-test/t/innodb_mysql_sync.test

@@ -43,6 +43,43 @@ DROP TABLE t1;
 SET DEBUG_SYNC='RESET';
 
 
+--echo #
+--echo # Bug#47459 Assertion in Diagnostics_area::set_eof_status on
+--echo #           OPTIMIZE TABLE
+--echo #
+
+--disable_warnings
+DROP TABLE IF EXISTS t1;
+--enable_warnings
+
+connect (con1, localhost, root);
+connection default;
+
+CREATE TABLE t1(a INT) ENGINE= InnoDB;
+
+--echo # Connection con1
+connection con1;
+SET DEBUG_SYNC= "ha_admin_open_ltable SIGNAL opening WAIT_FOR dropped";
+--echo # Sending:
+--send OPTIMIZE TABLE t1
+
+--echo # Connection default
+connection default;
+SET DEBUG_SYNC= "now WAIT_FOR opening";
+DROP TABLE t1;
+SET DEBUG_SYNC= "now SIGNAL dropped";
+
+--echo # Connection con1
+connection con1;
+--echo # Reaping: OPTIMIZE TABLE t1
+--reap
+
+--echo # Connection default
+connection default;
+disconnect con1;
+SET DEBUG_SYNC= "RESET";
+
+
 # Check that all connections opened by test cases in this file are really
 # gone so execution of other tests won't be affected by their presence.
 --source include/wait_until_count_sessions.inc

sql/sql_table.cc

@@ -5016,12 +5016,18 @@ static bool mysql_admin_table(THD* thd, TABLE_LIST* tables,
       {
         /* Clear the ticket released in close_thread_tables(). */
         table->mdl_request.ticket= NULL;
-        if ((table->table= open_ltable(thd, table, lock_type, 0)) &&
-            ((result_code= table->table->file->ha_analyze(thd, check_opt)) > 0))
-          result_code= 0; // analyze went ok
-        if (result_code)  // analyze failed
+        DEBUG_SYNC(thd, "ha_admin_open_ltable");
+        if (table->table= open_ltable(thd, table, lock_type, 0))
+        {
+          result_code= table->table->file->ha_analyze(thd, check_opt);
+          if (result_code == HA_ADMIN_ALREADY_DONE)
+            result_code= HA_ADMIN_OK;
+          else if (result_code)  // analyze failed
             table->table->file->print_error(result_code, MYF(0));
         }
+        else
+          result_code= -1; // open failed
+      }
       /* Start a new row for the final status row */
       protocol->prepare_for_resend();
       protocol->store(table_name, system_charset_info);