Merge branch 'openquery/MDEV-6916-maria-5.5-check_view-r4408' into 5.5

7 files changed, 227 insertions, 27 deletions

diff --git a/sql/lex.h b/sql/lex.h
index 9bf4c439cb6..65411402f6a 100644
--- a/sql/lex.h
+++ b/sql/lex.h
@@ -376,6 +376,7 @@ static SYMBOL symbols[] = {
   { "MULTIPOINT",	SYM(MULTIPOINT)},
   { "MULTIPOLYGON",	SYM(MULTIPOLYGON)},
   { "MUTEX",  SYM(MUTEX_SYM)},
+  { "MYSQL",            SYM(MYSQL_SYM)},
   { "MYSQL_ERRNO",      SYM(MYSQL_ERRNO_SYM)},
   { "NAME",             SYM(NAME_SYM)},
   { "NAMES",		SYM(NAMES_SYM)},
diff --git a/sql/sql_admin.cc b/sql/sql_admin.cc
index 92aa414b569..65292a526fa 100644
--- a/sql/sql_admin.cc
+++ b/sql/sql_admin.cc
@@ -314,7 +314,8 @@ static bool mysql_admin_table(THD* thd, TABLE_LIST* tables,
                                                   HA_CHECK_OPT *),
                               int (handler::*operator_func)(THD *,
                                                             HA_CHECK_OPT *),
-                              int (view_operator_func)(THD *, TABLE_LIST*))
+                              int (view_operator_func)(THD *, TABLE_LIST*,
+                                                       HA_CHECK_OPT *))
 {
   TABLE_LIST *table;
   SELECT_LEX *select= &thd->lex->select_lex;
@@ -380,7 +381,18 @@ static bool mysql_admin_table(THD* thd, TABLE_LIST* tables,
       lex->query_tables_own_last= 0;
 
       if (view_operator_func == NULL)
+      {
         table->required_type=FRMTYPE_TABLE;
+        DBUG_ASSERT(!lex->only_view);
+      }
+      else if (lex->only_view)
+      {
+        table->required_type= FRMTYPE_VIEW;
+      }
+      else if (!lex->only_view && lex->sql_command == SQLCOM_REPAIR)
+      {
+        table->required_type= FRMTYPE_TABLE;
+      }
 
       if (lex->sql_command == SQLCOM_CHECK ||
           lex->sql_command == SQLCOM_REPAIR ||
@@ -506,9 +518,9 @@ static bool mysql_admin_table(THD* thd, TABLE_LIST* tables,
     }
 
     /*
-      CHECK TABLE command is only command where VIEW allowed here and this
-      command use only temporary teble method for VIEWs resolving => there
-      can't be VIEW tree substitition of join view => if opening table
+      CHECK/REPAIR TABLE command is only command where VIEW allowed here and
+      this command use only temporary table method for VIEWs resolving =>
+      there can't be VIEW tree substitition of join view => if opening table
       succeed then table->table will have real TABLE pointer as value (in
       case of join view substitution table->table can be 0, but here it is
       impossible)
@@ -521,7 +533,7 @@ static bool mysql_admin_table(THD* thd, TABLE_LIST* tables,
                      ER_CHECK_NO_SUCH_TABLE, ER(ER_CHECK_NO_SUCH_TABLE));
       /* if it was a view will check md5 sum */
       if (table->view &&
-          view_checksum(thd, table) == HA_ADMIN_WRONG_CHECKSUM)
+          view_check(thd, table, check_opt) == HA_ADMIN_WRONG_CHECKSUM)
         push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
                      ER_VIEW_CHECKSUM, ER(ER_VIEW_CHECKSUM));
       if (thd->stmt_da->is_error() &&
@@ -536,7 +548,7 @@ static bool mysql_admin_table(THD* thd, TABLE_LIST* tables,
     if (table->view)
     {
       DBUG_PRINT("admin", ("calling view_operator_func"));
-      result_code= (*view_operator_func)(thd, table);
+      result_code= (*view_operator_func)(thd, table, check_opt);
       goto send_result;
     }
 
@@ -1071,7 +1083,7 @@ bool Check_table_statement::execute(THD *thd)
 
   res= mysql_admin_table(thd, first_table, &m_lex->check_opt, "check",
                          lock_type, 0, 0, HA_OPEN_FOR_REPAIR, 0,
-                         &handler::ha_check, &view_checksum);
+                         &handler::ha_check, &view_check);
 
   m_lex->select_lex.table_list.first= first_table;
   m_lex->query_tables= first_table;
@@ -1126,7 +1138,7 @@ bool Repair_table_statement::execute(THD *thd)
                          TL_WRITE, 1,
                          test(m_lex->check_opt.sql_flags & TT_USEFRM),
                          HA_OPEN_FOR_REPAIR, &prepare_for_repair,
-                         &handler::ha_repair, 0);
+                         &handler::ha_repair, &view_repair);
 
   /* ! we write after unlocking the table */
   if (!res && !m_lex->no_write_to_binlog)
diff --git a/sql/sql_base.cc b/sql/sql_base.cc
index affccf09513..592215da4d0 100644
--- a/sql/sql_base.cc
+++ b/sql/sql_base.cc
@@ -643,7 +643,8 @@ found:
     open_table_error(share, share->error, share->open_errno, share->errarg);
     DBUG_RETURN(0);
   }
-  if (share->is_view && !(db_flags & OPEN_VIEW))
+  if ((share->is_view && !(db_flags & OPEN_VIEW)) ||
+      (!share->is_view && (db_flags & OPEN_VIEW_ONLY)))
   {
     open_table_error(share, 1, ENOENT, 0);
     DBUG_RETURN(0);
@@ -3027,7 +3028,11 @@ retry_share:
   mysql_mutex_lock(&LOCK_open);
 
   if (!(share= get_table_share_with_discover(thd, table_list, key,
-                                             key_length, OPEN_VIEW,
+                                             key_length,
+                                             (OPEN_VIEW |
+                                              ((table_list->required_type ==
+                                                FRMTYPE_VIEW) ?
+                                               OPEN_VIEW_ONLY : 0)),
                                              &error,
                                              hash_value)))
   {
diff --git a/sql/sql_table.cc b/sql/sql_table.cc
index 586b542a290..6ec99cdf901 100644
--- a/sql/sql_table.cc
+++ b/sql/sql_table.cc
@@ -28,7 +28,6 @@
 #include "sql_base.h"   // open_table_uncached, lock_table_names
 #include "lock.h"       // mysql_unlock_tables
 #include "strfunc.h"    // find_type2, find_set
-#include "sql_view.h" // view_checksum 
 #include "sql_truncate.h"                       // regenerate_locked_table 
 #include "sql_partition.h"                      // mem_alloc_error,
                                                 // generate_partition_syntax,
diff --git a/sql/sql_view.cc b/sql/sql_view.cc
index 09784f7257a..24f01aeaa76 100644
--- a/sql/sql_view.cc
+++ b/sql/sql_view.cc
@@ -729,6 +729,26 @@ err:
 }
 
 
+static void make_view_filename(LEX_STRING *dir, char *dir_buff,
+                               size_t dir_buff_len,
+                               LEX_STRING *path, char *path_buff,
+                               size_t path_buff_len,
+                               LEX_STRING *file,
+                               TABLE_LIST *view)
+{
+  /* print file name */
+  dir->length= build_table_filename(dir_buff, dir_buff_len - 1,
+                                   view->db, "", "", 0);
+  dir->str= dir_buff;
+
+  path->length= build_table_filename(path_buff, path_buff_len - 1,
+                                     view->db, view->table_name, reg_ext, 0);
+  path->str= path_buff;
+
+  file->str= path->str + dir->length;
+  file->length= path->length - dir->length;
+}
+
 /* number of required parameters for making view */
 static const int required_view_parameters= 15;
 
@@ -791,6 +811,86 @@ static File_option view_parameters[]=
 static LEX_STRING view_file_type[]= {{(char*) STRING_WITH_LEN("VIEW") }};
 
 
+int mariadb_fix_view(THD *thd, TABLE_LIST *view, bool wrong_checksum,
+                     bool swap_alg)
+{
+  char dir_buff[FN_REFLEN + 1], path_buff[FN_REFLEN + 1];
+  LEX_STRING dir, file, path;
+  DBUG_ENTER("mariadb_fix_view");
+
+  if (!wrong_checksum && view->mariadb_version)
+    DBUG_RETURN(HA_ADMIN_OK);
+
+  make_view_filename(&dir, dir_buff, sizeof(dir_buff),
+                     &path, path_buff, sizeof(path_buff),
+                     &file, view);
+  /* init timestamp */
+  if (!view->timestamp.str)
+    view->timestamp.str= view->timestamp_buffer;
+
+  /* check old .frm */
+  {
+    char path_buff[FN_REFLEN];
+    LEX_STRING path;
+    File_parser *parser;
+
+    path.str= path_buff;
+    fn_format(path_buff, file.str, dir.str, "", MY_UNPACK_FILENAME);
+    path.length= strlen(path_buff);
+    if (access(path.str, F_OK))
+      DBUG_RETURN(HA_ADMIN_INVALID);
+
+    if (!(parser= sql_parse_prepare(&path, thd->mem_root, 0)))
+      DBUG_RETURN(HA_ADMIN_INTERNAL_ERROR);
+
+    if (!parser->ok() || !is_equal(&view_type, parser->type()))
+      DBUG_RETURN(HA_ADMIN_INVALID);
+  }
+
+  if (swap_alg && view->algorithm != VIEW_ALGORITHM_UNDEFINED)
+  {
+    DBUG_ASSERT(view->algorithm == VIEW_ALGORITHM_MERGE ||
+                view->algorithm == VIEW_ALGORITHM_TMPTABLE);
+    if (view->algorithm == VIEW_ALGORITHM_MERGE)
+      view->algorithm= VIEW_ALGORITHM_TMPTABLE;
+    else
+      view->algorithm= VIEW_ALGORITHM_MERGE;
+  }
+  else
+    swap_alg= 0;
+  if (wrong_checksum)
+  {
+    if (view->md5.length != 32)
+    {
+       if ((view->md5.str= (char *)thd->alloc(32 + 1)) == NULL)
+         DBUG_RETURN(HA_ADMIN_FAILED);
+    }
+    view->calc_md5(view->md5.str);
+    view->md5.length= 32;
+  }
+  view->mariadb_version= MYSQL_VERSION_ID;
+
+  if (sql_create_definition_file(&dir, &file, view_file_type,
+                                (uchar*)view, view_parameters))
+  {
+    sql_print_error("View '%-.192s'.'%-.192s': algorithm swap error.",
+                    view->db, view->table_name);
+    DBUG_RETURN(HA_ADMIN_INTERNAL_ERROR);
+  }
+  sql_print_information("View '%-.192s'.'%-.192s': versioned to %llu%s%s",
+                        view->db, view->table_name, view->mariadb_version,
+                        (wrong_checksum ? ", and checksum corrected" : ""),
+                        (swap_alg ?
+                          ((view->algorithm == VIEW_ALGORITHM_MERGE) ?
+                            ", and algorithm swapped to 'MERGE'"
+                           : ", and algorithm swapped to 'TEMPTABLE'")
+                         : ""));
+
+
+  DBUG_RETURN(HA_ADMIN_OK);
+}
+
+
 /*
   Register VIEW (write .frm & process .frm's history backups)
 
@@ -927,17 +1027,9 @@ static int mysql_register_view(THD *thd, TABLE_LIST *view,
   }
 loop_out:
   /* print file name */
-  dir.length= build_table_filename(dir_buff, sizeof(dir_buff) - 1,
-                                   view->db, "", "", 0);
-  dir.str= dir_buff;
-
-  path.length= build_table_filename(path_buff, sizeof(path_buff) - 1,
-                                    view->db, view->table_name, reg_ext, 0);
-  path.str= path_buff;
-
-  file.str= path.str + dir.length;
-  file.length= path.length - dir.length;
-
+  make_view_filename(&dir, dir_buff, sizeof(dir_buff),
+                     &path, path_buff, sizeof(path_buff),
+                     &file, view);
   /* init timestamp */
   if (!view->timestamp.str)
     view->timestamp.str= view->timestamp_buffer;
@@ -1063,7 +1155,7 @@ err:
 
   SYNOPSIS
     mysql_make_view()
-    thd			Thread handler
+    thd			Thread handle
     parser		parser object
     table		TABLE_LIST structure for filling
     flags               flags
@@ -1634,7 +1726,7 @@ err:
 
   SYNOPSIS
     mysql_drop_view()
-    thd		- thread handler
+    thd		- thread handle
     views	- views to delete
     drop_mode	- cascade/check
 
@@ -1755,7 +1847,7 @@ bool mysql_drop_view(THD *thd, TABLE_LIST *views, enum_drop_mode drop_mode)
 
   SYNOPSIS
     check_key_in_view()
-    thd     thread handler
+    thd     thread handle
     view    view for check with opened table
 
   DESCRIPTION
@@ -1941,6 +2033,63 @@ int view_checksum(THD *thd, TABLE_LIST *view)
           HA_ADMIN_OK);
 }
 
+/**
+  Check view
+
+  @param thd             thread handle
+  @param view            view for check
+  @param check_opt       check options
+
+  @retval HA_ADMIN_OK               OK
+  @retval HA_ADMIN_NOT_IMPLEMENTED  it is not VIEW
+  @retval HA_ADMIN_WRONG_CHECKSUM   check sum is wrong
+*/
+int view_check(THD *thd, TABLE_LIST *view, HA_CHECK_OPT *check_opt)
+{
+  int res;
+  DBUG_ENTER("view_check");
+  if ((res= view_checksum(thd, view)) != HA_ADMIN_OK)
+    DBUG_RETURN(res);
+  if (((check_opt->sql_flags & TT_FOR_UPGRADE) &&
+       !view->mariadb_version))
+  {
+    push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_NOTE,
+                            ER_TABLE_NEEDS_UPGRADE,
+                            ER(ER_TABLE_NEEDS_UPGRADE),
+                            view->db,
+                            view->table_name);
+    DBUG_RETURN(HA_ADMIN_NEEDS_UPGRADE);
+  }
+  DBUG_RETURN(HA_ADMIN_OK);
+}
+
+
+/**
+  Repair view
+
+  @param thd             thread handle
+  @param view            view for check
+  @param check_opt       check options
+
+  @retval HA_ADMIN_OK               OK
+  @retval HA_ADMIN_NOT_IMPLEMENTED  it is not VIEW
+  @retval HA_ADMIN_WRONG_CHECKSUM   check sum is wrong
+*/
+
+int view_repair(THD *thd, TABLE_LIST *view, HA_CHECK_OPT *check_opt)
+{
+  DBUG_ENTER("view_repair");
+  bool swap_alg= (check_opt->sql_flags & TT_FROM_MYSQL);
+  bool wrong_checksum= view_checksum(thd, view);
+  int ret;
+  if (wrong_checksum || swap_alg || (!view->mariadb_version))
+  {
+    ret= mariadb_fix_view(thd, view, wrong_checksum, swap_alg);
+    DBUG_RETURN(ret);
+  }
+  DBUG_RETURN(HA_ADMIN_OK);
+}
+
 /*
   rename view
 
diff --git a/sql/sql_view.h b/sql/sql_view.h
index 2e9c77252e8..1026c57aaaf 100644
--- a/sql/sql_view.h
+++ b/sql/sql_view.h
@@ -44,6 +44,8 @@ bool check_key_in_view(THD *thd, TABLE_LIST * view);
 bool insert_view_fields(THD *thd, List<Item> *list, TABLE_LIST *view);
 
 int view_checksum(THD *thd, TABLE_LIST *view);
+int view_check(THD *thd, TABLE_LIST *view, HA_CHECK_OPT *check_opt);
+int view_repair(THD *thd, TABLE_LIST *view, HA_CHECK_OPT *check_opt);
 
 extern TYPELIB updatable_views_with_limit_typelib;
 
diff --git a/sql/sql_yacc.yy b/sql/sql_yacc.yy
index bd0014f4764..8f135e63113 100644
--- a/sql/sql_yacc.yy
+++ b/sql/sql_yacc.yy
@@ -1145,6 +1145,7 @@ bool my_yyoverflow(short **a, YYSTYPE **b, ulong *yystacksize);
 %token  MULTIPOINT
 %token  MULTIPOLYGON
 %token  MUTEX_SYM
+%token  MYSQL_SYM
 %token  MYSQL_ERRNO_SYM
 %token  NAMES_SYM                     /* SQL-2003-N */
 %token  NAME_SYM                      /* SQL-2003-N */
@@ -7191,7 +7192,7 @@ opt_checksum_type:
         ;
 
 repair:
-          REPAIR opt_no_write_to_binlog table_or_tables
+          REPAIR opt_no_write_to_binlog table_or_view
           {
             LEX *lex=Lex;
             lex->sql_command = SQLCOM_REPAIR;
@@ -7204,6 +7205,15 @@ repair:
           table_list opt_mi_repair_type
           {
             LEX* lex= thd->lex;
+            if ((lex->only_view &&
+                 ((lex->check_opt.flags & (T_QUICK | T_EXTEND)) ||
+                   (lex->check_opt.sql_flags & TT_USEFRM))) ||
+                (!lex->only_view &&
+                 (lex->check_opt.sql_flags & TT_FROM_MYSQL)))
+            {
+              my_parse_error(ER(ER_SYNTAX_ERROR));
+              MYSQL_YYABORT;
+            }
             DBUG_ASSERT(!lex->m_stmt);
             lex->m_stmt= new (thd->mem_root) Repair_table_statement(lex);
             if (lex->m_stmt == NULL)
@@ -7225,6 +7235,7 @@ mi_repair_type:
           QUICK        { Lex->check_opt.flags|= T_QUICK; }
         | EXTENDED_SYM { Lex->check_opt.flags|= T_EXTEND; }
         | USE_FRM      { Lex->check_opt.sql_flags|= TT_USEFRM; }
+        | FROM MYSQL_SYM { Lex->check_opt.sql_flags|= TT_FROM_MYSQL; }
         ;
 
 analyze:
@@ -7257,7 +7268,7 @@ binlog_base64_event:
         ;
 
 check:
-          CHECK_SYM table_or_tables
+          CHECK_SYM table_or_view
           {
             LEX *lex=Lex;
 
@@ -7275,6 +7286,13 @@ check:
           table_list opt_mi_check_type
           {
             LEX* lex= thd->lex;
+            if (lex->only_view &&
+                (lex->check_opt.flags & (T_QUICK | T_FAST | T_EXTEND |
+                                         T_CHECK_ONLY_CHANGED)))
+            {
+              my_parse_error(ER(ER_SYNTAX_ERROR));
+              MYSQL_YYABORT;
+            }
             DBUG_ASSERT(!lex->m_stmt);
             lex->m_stmt= new (thd->mem_root) Check_table_statement(lex);
             if (lex->m_stmt == NULL)
@@ -7382,6 +7400,7 @@ keycache:
             LEX *lex=Lex;
             lex->sql_command= SQLCOM_ASSIGN_TO_KEYCACHE;
             lex->ident= $6;
+            lex->only_view= FALSE;
           }
         ;
 
@@ -7426,6 +7445,7 @@ preload:
             LEX *lex=Lex;
             lex->sql_command=SQLCOM_PRELOAD_KEYS;
             lex->alter_info.reset();
+            lex->only_view= FALSE;
           }
           preload_list_or_parts
           {}
@@ -13187,6 +13207,7 @@ keyword_sp:
         | MULTIPOINT               {}
         | MULTIPOLYGON             {}
         | MUTEX_SYM                {}
+        | MYSQL_SYM                {}
         | MYSQL_ERRNO_SYM          {}
         | NAME_SYM                 {}
         | NAMES_SYM                {}
@@ -13786,7 +13807,18 @@ lock:
 
 table_or_tables:
           TABLE_SYM
+         { Lex->only_view= FALSE; }
+        | TABLES
+         { Lex->only_view= FALSE; }
+        ;
+
+table_or_view:
+          TABLE_SYM
+         { Lex->only_view= FALSE; }
         | TABLES
+         { Lex->only_view= FALSE; }
+        | VIEW_SYM
+         { Lex->only_view= TRUE; }
         ;
 
 table_lock_list: