system charset (with wich VIEW printed) saved in .frm and restored before parsing view (BUG#5163)

mysql-test/r/view.result:
  VIEWs with national characters
mysql-test/t/view.test:
  VIEWs with national characters
sql/sql_view.cc:
  system charset (with wich VIEW printed) saved in .frm and restored before parsing view
sql/table.h:
  system charset (with wich VIEW printed) saved in .frm

mysql-test/r/view.result

@@ -1222,3 +1222,11 @@ show create view v1;
 Table	Create Table
 v1	CREATE VIEW `test`.`v1` AS select 99999999999999999999999999999999999999999999999999999 AS `col1`
 drop view v1;
+create table t (c char);
+create view v as select c from t;
+insert into v values ('');
+select * from v;
+c
+
+drop view v;
+drop table t;

mysql-test/t/view.test

@@ -1168,3 +1168,13 @@ drop table t1;
 create view v1 as select 99999999999999999999999999999999999999999999999999999 as col1;
 show create view v1;
 drop view v1;
+
+#
+# VIEWs with national characters
+#
+create table t (c char);
+create view v as select c from t;
+insert into v values ('');
+select * from v;
+drop view v;
+drop table t;

sql/sql_view.cc

@@ -318,8 +318,10 @@ int mysql_create_view(THD *thd,
 }
 
 
-// index of revision number in following table
-static const int revision_number_position= 4;
+/* index of revision number in following table */
+static const int revision_number_position= 5;
+/* index of last required parameter for making view */
+static const int last_parameter= 8;
 
 static char *view_field_names[]=
 {
@@ -327,6 +329,7 @@ static char *view_field_names[]=
   (char*)"md5",
   (char*)"updatable",
   (char*)"algorithm",
+  (char*)"syscharset",
   (char*)"revision",
   (char*)"timestamp",
   (char*)"create-version",
@@ -343,13 +346,15 @@ static File_option view_parameters[]=
   FILE_OPTIONS_ULONGLONG},
  {{view_field_names[3], 9},	offsetof(TABLE_LIST, algorithm),
   FILE_OPTIONS_ULONGLONG},
- {{view_field_names[4], 8},	offsetof(TABLE_LIST, revision),
+ {{view_field_names[4], 10},    offsetof(TABLE_LIST, syscharset),
+  FILE_OPTIONS_STRING},
+ {{view_field_names[5], 8},	offsetof(TABLE_LIST, revision),
   FILE_OPTIONS_REV},
- {{view_field_names[5], 9},	offsetof(TABLE_LIST, timestamp),
+ {{view_field_names[6], 9},	offsetof(TABLE_LIST, timestamp),
   FILE_OPTIONS_TIMESTAMP},
- {{view_field_names[6], 14},	offsetof(TABLE_LIST, file_version),
+ {{view_field_names[7], 14},	offsetof(TABLE_LIST, file_version),
   FILE_OPTIONS_ULONGLONG},
- {{view_field_names[7], 6},	offsetof(TABLE_LIST, source),
+ {{view_field_names[8], 6},	offsetof(TABLE_LIST, source),
   FILE_OPTIONS_ESTRING},
  {{NULL, 0},			0,
   FILE_OPTIONS_STRING}
@@ -468,6 +473,8 @@ static int mysql_register_view(THD *thd, TABLE_LIST *view,
   view->query.length= str.length()-1; // we do not need last \0
   view->source.str= thd->query;
   view->source.length= thd->query_length;
+  view->syscharset.str= (char *)system_charset_info->csname;
+  view->syscharset.length= strlen(view->syscharset.str);
   view->file_version= 1;
   view->calc_md5(md5);
   view->md5.str= md5;
@@ -552,7 +559,8 @@ mysql_make_view(File_parser *parser, TABLE_LIST *table)
     TODO: when VIEWs will be stored in cache, table mem_root should
     be used here
   */
-  if (parser->parse((gptr)table, &thd->mem_root, view_parameters, 6))
+  if (parser->parse((gptr)table, &thd->mem_root, view_parameters,
+                    last_parameter))
     goto err;
 
   /*
@@ -604,7 +612,21 @@ mysql_make_view(File_parser *parser, TABLE_LIST *table)
     */
     thd->options&= ~(MODE_PIPES_AS_CONCAT | MODE_ANSI_QUOTES |
                      MODE_IGNORE_SPACE | MODE_NO_BACKSLASH_ESCAPES);
+    CHARSET_INFO *save_cs= thd->variables.character_set_client;
+    if (!table->syscharset.length)
+      thd->variables.character_set_client= system_charset_info;
+    else
+    {
+      if (!(thd->variables.character_set_client=
+            get_charset_by_csname(table->syscharset.str,
+                                  MY_CS_PRIMARY, MYF(MY_WME))))
+      {
+        thd->variables.character_set_client= save_cs;
+        goto err;
+      }
+    }
     res= yyparse((void *)thd);
+    thd->variables.character_set_client= save_cs;
     thd->options= options;
   }
   if (!res && !thd->is_fatal_error)

sql/table.h

@@ -224,6 +224,7 @@ typedef struct st_table_list
   LEX_STRING	view_db;		/* save view database */
   LEX_STRING	view_name;		/* save view name */
   LEX_STRING	timestamp;		/* GMT time stamp of last operation */
+  LEX_STRING    syscharset;             /* charset of VIEW query text*/
   ulonglong	file_version;		/* version of file's field set */
   ulonglong     updatable_view;        /* VIEW can be updated */
   ulonglong	revision;		/* revision control number */