Fix for bug #6572: SHOW ERRORS doesn't

mysql-test/r/warnings.result

 drop table if exists t1, t2;
 SET SQL_WARNINGS=1;
 create table t1 (a int);
+create table t1 (a int);
+ERROR 42S01: Table 't1' already exists
+show count(*) errors;
+@@session.error_count
+1
+show errors;
+Level	Code	Message
+Error	1050	Table 't1' already exists
+show warnings;
+Level	Code	Message
+Error	1050	Table 't1' already exists
+create table t2(a int) default charset qwerty;
+ERROR 42000: Unknown character set: 'qwerty'
+show count(*) errors;
+@@session.error_count
+1
+show errors;
+Level	Code	Message
+Error	1115	Unknown character set: 'qwerty'
+create table t (i);
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ')' at line 1
+show count(*) errors;
+@@session.error_count
+1
+show errors;
+Level	Code	Message
+Error	1064	You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ')' at line 1
 insert into t1 values (1);
 insert into t1 values ("hej");
 Warnings:

mysql-test/t/warnings.test

@@ -7,6 +7,19 @@ drop table if exists t1, t2;
 SET SQL_WARNINGS=1;
 
 create table t1 (a int);
+--error 1050
+create table t1 (a int);
+show count(*) errors;
+show errors;
+show warnings;
+--error 1115
+create table t2(a int) default charset qwerty;
+show count(*) errors;
+show errors;
+--error 1064
+create table t (i);
+show count(*) errors;
+show errors;
 insert into t1 values (1);
 insert into t1 values ("hej");
 insert into t1 values ("hej"),("d");

sql/protocol.cc

@@ -58,6 +58,7 @@ void send_error(THD *thd, uint sql_errno, const char *err)
   uint length;
   char buff[MYSQL_ERRMSG_SIZE+2], *pos;
 #endif
+  const char *orig_err= err;
   NET *net= &thd->net;
   DBUG_ENTER("send_error");
   DBUG_PRINT("enter",("sql_errno: %d  err: %s", sql_errno,
@@ -82,6 +83,7 @@ void send_error(THD *thd, uint sql_errno, const char *err)
 	err=ER(sql_errno);	 /* purecov: inspected */
       }
     }
+    orig_err= err;
   }
 
 #ifdef EMBEDDED_LIBRARY
@@ -120,6 +122,8 @@ void send_error(THD *thd, uint sql_errno, const char *err)
   }
   VOID(net_write_command(net,(uchar) 255, "", 0, (char*) err,length));
 #endif  /* EMBEDDED_LIBRARY*/
+  push_warning(thd, MYSQL_ERROR::WARN_LEVEL_ERROR, sql_errno,
+	       orig_err ? orig_err : ER(sql_errno));
   thd->is_fatal_error=0;			// Error message is given
   thd->net.report_error= 0;
 
@@ -247,6 +251,8 @@ net_printf(THD *thd, uint errcode, ...)
   strmake(net->last_error, text_pos, length);
   strmake(net->sqlstate, mysql_errno_to_sqlstate(errcode), SQLSTATE_LENGTH);
 #endif
+  push_warning(thd, MYSQL_ERROR::WARN_LEVEL_ERROR, errcode,
+	       text_pos ? text_pos : ER(errcode));
   thd->is_fatal_error=0;			// Error message is given
   DBUG_VOID_RETURN;
 }