added worning about changing requested size of query cache (BUG#1502)

include/mysqld_error.h

@@ -295,4 +295,5 @@
 #define ER_BAD_SLAVE_UNTIL_COND 1276
 #define ER_MISSING_SKIP_SLAVE 1277
 #define ER_UNTIL_COND_IGNORED 1278
-#define ER_ERROR_MESSAGES 279
+#define ER_WARN_QC_RESIZE 1279
+#define ER_ERROR_MESSAGES 280

mysql-test/r/query_cache.result

@@ -579,24 +579,32 @@ query_cache_size	0
 select * from t1;
 a
 set GLOBAL query_cache_size=1024;
+Warnings:
+Warning	1279	Query cache failed to set size 1024, new query cache size is 0
 show global variables like "query_cache_size";
 Variable_name	Value
 query_cache_size	0
 select * from t1;
 a
 set GLOBAL query_cache_size=10240;
+Warnings:
+Warning	1279	Query cache failed to set size 10240, new query cache size is 0
 show global variables like "query_cache_size";
 Variable_name	Value
 query_cache_size	0
 select * from t1;
 a
 set GLOBAL query_cache_size=20480;
+Warnings:
+Warning	1279	Query cache failed to set size 20480, new query cache size is 0
 show global variables like "query_cache_size";
 Variable_name	Value
 query_cache_size	0
 select * from t1;
 a
 set GLOBAL query_cache_size=40960;
+Warnings:
+Warning	1279	Query cache failed to set size 40960, new query cache size is 0
 show global variables like "query_cache_size";
 Variable_name	Value
 query_cache_size	0

sql/set_var.cc

@@ -801,7 +801,12 @@ static void fix_net_retry_count(THD *thd __attribute__(unused),
 static void fix_query_cache_size(THD *thd, enum_var_type type)
 {
 #ifdef HAVE_QUERY_CACHE
+  ulong requested= query_cache_size;
   query_cache.resize(query_cache_size);
+  if (requested != query_cache_size)
+    push_warning_printf(current_thd, MYSQL_ERROR::WARN_LEVEL_WARN,
+			ER_WARN_QC_RESIZE, ER(ER_WARN_QC_RESIZE),
+			requested, query_cache_size);
 #endif
 }
 

sql/share/czech/errmsg.txt

@@ -291,3 +291,4 @@ character-set=latin2
 "Wrong parameter or combination of parameters for START SLAVE UNTIL"
 "It is recommended to run with --skip-slave-start when doing step-by-step replication with START SLAVE UNTIL, otherwise you are not safe in case of unexpected slave's mysqld restart"
 "SQL thread is not to be started so UNTIL options are ignored"
+"Query cache failed to set size %lu, new query cache size is %lu",

sql/share/danish/errmsg.txt

@@ -285,3 +285,4 @@ character-set=latin1
 "Wrong parameter or combination of parameters for START SLAVE UNTIL"
 "It is recommended to run with --skip-slave-start when doing step-by-step replication with START SLAVE UNTIL, otherwise you are not safe in case of unexpected slave's mysqld restart"
 "SQL thread is not to be started so UNTIL options are ignored"
+"Query cache failed to set size %lu, new query cache size is %lu",

sql/share/dutch/errmsg.txt

@@ -293,3 +293,4 @@ character-set=latin1
 "Wrong parameter or combination of parameters for START SLAVE UNTIL"
 "It is recommended to run with --skip-slave-start when doing step-by-step replication with START SLAVE UNTIL, otherwise you are not safe in case of unexpected slave's mysqld restart"
 "SQL thread is not to be started so UNTIL options are ignored"
+"Query cache failed to set size %lu, new query cache size is %lu",

sql/share/english/errmsg.txt

@@ -282,3 +282,4 @@ character-set=latin1
 "Wrong parameter or combination of parameters for START SLAVE UNTIL"
 "It is recommended to run with --skip-slave-start when doing step-by-step replication with START SLAVE UNTIL, otherwise you are not safe in case of unexpected slave's mysqld restart"
 "SQL thread is not to be started so UNTIL options are ignored"
+"Query cache failed to set size %lu, new query cache size is %lu",

sql/share/estonian/errmsg.txt

@@ -287,3 +287,4 @@ character-set=latin7
 "Wrong parameter or combination of parameters for START SLAVE UNTIL"
 "It is recommended to run with --skip-slave-start when doing step-by-step replication with START SLAVE UNTIL, otherwise you are not safe in case of unexpected slave's mysqld restart"
 "SQL thread is not to be started so UNTIL options are ignored"
+"Query cache failed to set size %lu, new query cache size is %lu",

sql/share/french/errmsg.txt

@@ -282,3 +282,4 @@ character-set=latin1
 "Wrong parameter or combination of parameters for START SLAVE UNTIL"
 "It is recommended to run with --skip-slave-start when doing step-by-step replication with START SLAVE UNTIL, otherwise you are not safe in case of unexpected slave's mysqld restart"
 "SQL thread is not to be started so UNTIL options are ignored"
+"Query cache failed to set size %lu, new query cache size is %lu",

sql/share/german/errmsg.txt

@@ -291,3 +291,4 @@ character-set=latin1
 "Wrong parameter or combination of parameters for START SLAVE UNTIL"
 "It is recommended to run with --skip-slave-start when doing step-by-step replication with START SLAVE UNTIL, otherwise you are not safe in case of unexpected slave's mysqld restart"
 "SQL thread is not to be started so UNTIL options are ignored"
+"Query cache failed to set size %lu, new query cache size is %lu",

sql/share/greek/errmsg.txt

@@ -282,3 +282,4 @@ character-set=greek
 "Wrong parameter or combination of parameters for START SLAVE UNTIL"
 "It is recommended to run with --skip-slave-start when doing step-by-step replication with START SLAVE UNTIL, otherwise you are not safe in case of unexpected slave's mysqld restart"
 "SQL thread is not to be started so UNTIL options are ignored"
+"Query cache failed to set size %lu, new query cache size is %lu",

sql/share/hungarian/errmsg.txt

@@ -284,3 +284,4 @@ character-set=latin2
 "Wrong parameter or combination of parameters for START SLAVE UNTIL"
 "It is recommended to run with --skip-slave-start when doing step-by-step replication with START SLAVE UNTIL, otherwise you are not safe in case of unexpected slave's mysqld restart"
 "SQL thread is not to be started so UNTIL options are ignored"
+"Query cache failed to set size %lu, new query cache size is %lu",

sql/share/italian/errmsg.txt

@@ -282,3 +282,4 @@ character-set=latin1
 "Wrong parameter or combination of parameters for START SLAVE UNTIL"
 "It is recommended to run with --skip-slave-start when doing step-by-step replication with START SLAVE UNTIL, otherwise you are not safe in case of unexpected slave's mysqld restart"
 "SQL thread is not to be started so UNTIL options are ignored"
+"Query cache failed to set size %lu, new query cache size is %lu",

sql/share/japanese/errmsg.txt

@@ -284,3 +284,4 @@ character-set=ujis
 "Wrong parameter or combination of parameters for START SLAVE UNTIL"
 "It is recommended to run with --skip-slave-start when doing step-by-step replication with START SLAVE UNTIL, otherwise you are not safe in case of unexpected slave's mysqld restart"
 "SQL thread is not to be started so UNTIL options are ignored"
+"Query cache failed to set size %lu, new query cache size is %lu",

sql/share/korean/errmsg.txt

@@ -282,3 +282,4 @@ character-set=euckr
 "Wrong parameter or combination of parameters for START SLAVE UNTIL"
 "It is recommended to run with --skip-slave-start when doing step-by-step replication with START SLAVE UNTIL, otherwise you are not safe in case of unexpected slave's mysqld restart"
 "SQL thread is not to be started so UNTIL options are ignored"
+"Query cache failed to set size %lu, new query cache size is %lu",

sql/share/norwegian-ny/errmsg.txt

@@ -284,3 +284,4 @@ character-set=latin1
 "Wrong parameter or combination of parameters for START SLAVE UNTIL"
 "It is recommended to run with --skip-slave-start when doing step-by-step replication with START SLAVE UNTIL, otherwise you are not safe in case of unexpected slave's mysqld restart"
 "SQL thread is not to be started so UNTIL options are ignored"
+"Query cache failed to set size %lu, new query cache size is %lu",

sql/share/norwegian/errmsg.txt

@@ -284,3 +284,4 @@ character-set=latin1
 "Wrong parameter or combination of parameters for START SLAVE UNTIL"
 "It is recommended to run with --skip-slave-start when doing step-by-step replication with START SLAVE UNTIL, otherwise you are not safe in case of unexpected slave's mysqld restart"
 "SQL thread is not to be started so UNTIL options are ignored"
+"Query cache failed to set size %lu, new query cache size is %lu",

sql/share/polish/errmsg.txt

@@ -286,3 +286,4 @@ character-set=latin2
 "Wrong parameter or combination of parameters for START SLAVE UNTIL"
 "It is recommended to run with --skip-slave-start when doing step-by-step replication with START SLAVE UNTIL, otherwise you are not safe in case of unexpected slave's mysqld restart"
 "SQL thread is not to be started so UNTIL options are ignored"
+"Query cache failed to set size %lu, new query cache size is %lu",

sql/share/portuguese/errmsg.txt

@@ -283,3 +283,4 @@ character-set=latin1
 "Wrong parameter or combination of parameters for START SLAVE UNTIL"
 "It is recommended to run with --skip-slave-start when doing step-by-step replication with START SLAVE UNTIL, otherwise you are not safe in case of unexpected slave's mysqld restart"
 "SQL thread is not to be started so UNTIL options are ignored"
+"Query cache failed to set size %lu, new query cache size is %lu",

sql/share/romanian/errmsg.txt

@@ -286,3 +286,4 @@ character-set=latin2
 "Wrong parameter or combination of parameters for START SLAVE UNTIL"
 "It is recommended to run with --skip-slave-start when doing step-by-step replication with START SLAVE UNTIL, otherwise you are not safe in case of unexpected slave's mysqld restart"
 "SQL thread is not to be started so UNTIL options are ignored"
+"Query cache failed to set size %lu, new query cache size is %lu",

sql/share/russian/errmsg.txt

@@ -284,3 +284,4 @@ character-set=koi8r
 "Wrong parameter or combination of parameters for START SLAVE UNTIL"
 "It is recommended to run with --skip-slave-start when doing step-by-step replication with START SLAVE UNTIL, otherwise you are not safe in case of unexpected slave's mysqld restart"
 "SQL thread is not to be started so UNTIL options are ignored"
+"      %lu,     - %lu",

sql/share/serbian/errmsg.txt

@@ -277,3 +277,4 @@ character-set=cp1250
 "Wrong parameter or combination of parameters for START SLAVE UNTIL"
 "It is recommended to run with --skip-slave-start when doing step-by-step replication with START SLAVE UNTIL, otherwise you are not safe in case of unexpected slave's mysqld restart"
 "SQL thread is not to be started so UNTIL options are ignored"
+"Query cache failed to set size %lu, new query cache size is %lu",

sql/share/slovak/errmsg.txt

@@ -290,3 +290,4 @@ character-set=latin2
 "Wrong parameter or combination of parameters for START SLAVE UNTIL"
 "It is recommended to run with --skip-slave-start when doing step-by-step replication with START SLAVE UNTIL, otherwise you are not safe in case of unexpected slave's mysqld restart"
 "SQL thread is not to be started so UNTIL options are ignored"
+"Query cache failed to set size %lu, new query cache size is %lu",

sql/share/spanish/errmsg.txt

@@ -284,3 +284,4 @@ character-set=latin1
 "Wrong parameter or combination of parameters for START SLAVE UNTIL"
 "It is recommended to run with --skip-slave-start when doing step-by-step replication with START SLAVE UNTIL, otherwise you are not safe in case of unexpected slave's mysqld restart"
 "SQL thread is not to be started so UNTIL options are ignored"
+"Query cache failed to set size %lu, new query cache size is %lu",

sql/share/swedish/errmsg.txt

@@ -282,3 +282,4 @@ character-set=latin1
 "Wrong parameter or combination of parameters for START SLAVE UNTIL"
 "It is recommended to run with --skip-slave-start when doing step-by-step replication with START SLAVE UNTIL, otherwise you are not safe in case of unexpected slave's mysqld restart"
 "SQL thread is not to be started so UNTIL options are ignored"
+"Query cache failed to set size %lu, new query cache size is %lu",

sql/share/ukrainian/errmsg.txt

@@ -287,3 +287,4 @@ character-set=koi8u
 "Wrong parameter or combination of parameters for START SLAVE UNTIL"
 "It is recommended to run with --skip-slave-start when doing step-by-step replication with START SLAVE UNTIL, otherwise you are not safe in case of unexpected slave's mysqld restart"
 "SQL thread is not to be started so UNTIL options are ignored"
+" Ԧ   ͦ %lu,  ͦ  Ԧ - %lu",