Fixed BUG#9004: Inconsistent behaviour of SP re. warnings

mysql-test/r/sp.result:
  New test case for BUG#9004.
  Also updated some other results, since formerly "invisible" (but correct)
  warnings now are visible.
mysql-test/t/sp.test:
  New test case for BUG#9004.
sql/sql_error.cc:
  Don't reset warnings while executing a stored routine.
sql/sql_parse.cc:
  Don't reset warnings while executing a stored routine.

mysql-test/r/sp.result

@@ -667,6 +667,8 @@ delete from t1|
 drop table if exists t3|
 create table t3 ( s char(16), d int)|
 call into_test4()|
+Warnings:
+Warning	1329	No data to FETCH
 select * from t3|
 s	d
 into4	NULL
@@ -1792,7 +1794,12 @@ end if;
 insert into t4 values (2, rc, t3);
 end|
 call bug1863(10)|
+Warnings:
+Note	1051	Unknown table 'temp_t1'
+Warning	1329	No data to FETCH
 call bug1863(10)|
+Warnings:
+Warning	1329	No data to FETCH
 select * from t4|
 f1	rc	t3
 2	0	NULL
@@ -2090,7 +2097,11 @@ begin
 end|
 call bug4579_1()|
 call bug4579_1()|
+Warnings:
+Warning	1329	No data to FETCH
 call bug4579_1()|
+Warnings:
+Warning	1329	No data to FETCH
 drop procedure bug4579_1|
 drop procedure bug4579_2|
 drop table t3|
@@ -3010,4 +3021,24 @@ select @x|
 @x
 2005
 drop function bug8861|
+drop procedure if exists bug9004_1|
+drop procedure if exists bug9004_2|
+create procedure bug9004_1(x char(16))
+begin
+insert into t1 values (x, 42);
+insert into t1 values (x, 17);
+end|
+create procedure bug9004_2(x char(16))
+call bug9004_1(x)|
+call bug9004_1('12345678901234567')|
+Warnings:
+Warning	1265	Data truncated for column 'id' at row 1
+Warning	1265	Data truncated for column 'id' at row 2
+call bug9004_2('12345678901234567890')|
+Warnings:
+Warning	1265	Data truncated for column 'id' at row 1
+Warning	1265	Data truncated for column 'id' at row 2
+delete from t1|
+drop procedure bug9004_1|
+drop procedure bug9004_2|
 drop table t1,t2;

mysql-test/t/sp.test

@@ -3700,6 +3700,30 @@ select @x|
 drop function bug8861|
 
 
+#
+# BUG#9004: Inconsistent behaviour of SP re. warnings
+#
+--disable_warnings
+drop procedure if exists bug9004_1|
+drop procedure if exists bug9004_2|
+--enable_warnings
+create procedure bug9004_1(x char(16))
+begin
+  insert into t1 values (x, 42);
+  insert into t1 values (x, 17);
+end|
+create procedure bug9004_2(x char(16))
+  call bug9004_1(x)|
+
+# Truncation warnings expected...
+call bug9004_1('12345678901234567')|
+call bug9004_2('12345678901234567890')|
+
+delete from t1|
+drop procedure bug9004_1|
+drop procedure bug9004_2|
+
+
 #
 # BUG#NNNN: New bug synopsis
 #

sql/sql_error.cc

@@ -113,7 +113,7 @@ MYSQL_ERROR *push_warning(THD *thd, MYSQL_ERROR::enum_warning_level level,
       !(thd->options & OPTION_SQL_NOTES))
     DBUG_RETURN(0);
 
-  if (thd->query_id != thd->warn_id)
+  if (thd->query_id != thd->warn_id && !thd->spcont)
     mysql_reset_errors(thd, 0);
   thd->got_warning= 1;
 

sql/sql_parse.cc

@@ -2268,9 +2268,11 @@ mysql_execute_command(THD *thd)
     A better approach would be to reset this for any commands
     that is not a SHOW command or a select that only access local
     variables, but for now this is probably good enough.
+    Don't reset warnings when executing a stored routine.
   */
-  if (all_tables || &lex->select_lex != lex->all_selects_list ||
-      lex->spfuns.records || lex->spprocs.records)
+  if ((all_tables || &lex->select_lex != lex->all_selects_list ||
+       lex->spfuns.records || lex->spprocs.records) &&
+      !thd->spcont)
     mysql_reset_errors(thd, 0);
 
 #ifdef HAVE_REPLICATION