Merge branch '10.3' into 10.4

b4477ae7 · Sergei Golubchik · 8a7776a8 · a36fc80a · b4477ae7 · b4477ae7
Commit b4477ae7 authored Feb 10, 2022 by Sergei Golubchik
24 changed files
--- a/client/mysql_upgrade.c
+++ b/client/mysql_upgrade.c
@@ -121,7 +121,6 @@ static struct my_option my_long_options[]=
   &opt_not_used, &opt_not_used, 0 , GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0},
  {"host", 'h', "Connect to host.", 0,
   0, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
-#define PASSWORD_OPT 12
  {"password", 'p',
   "Password to use when connecting to server. If password is not given,"
   " it's solicited on the tty.", &opt_password,&opt_password,
@@ -153,7 +152,6 @@ static struct my_option my_long_options[]=
  {"upgrade-system-tables", 's', "Only upgrade the system tables in the mysql database. Tables in other databases are not checked or touched.",
   &opt_systables_only, &opt_systables_only, 0,
   GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0},
-#define USER_OPT (array_elements(my_long_options) - 6)
  {"user", 'u', "User for login.", &opt_user,
   &opt_user, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
  {"verbose", 'v', "Display more output about the process; Using it twice will print connection argument; Using it 3 times will print out all CHECK, RENAME and ALTER TABLE during the check phase.",
@@ -260,11 +258,11 @@ static void print_error(const char *error_msg, DYNAMIC_STRING *output)
 */
 static void add_one_option_cmd_line(DYNAMIC_STRING *ds,
-                                    const struct my_option *opt,
+                                    const char *name,
-                                    const char* arg)
+                                    const char *arg)
 {
  dynstr_append(ds, "--");
-  dynstr_append(ds, opt->name);
+  dynstr_append(ds, name);
  if (arg)
  {
    dynstr_append(ds, "=");
@@ -274,10 +272,10 @@ static void add_one_option_cmd_line(DYNAMIC_STRING *ds,
 }
 static void add_one_option_cnf_file(DYNAMIC_STRING *ds,
-                                    const struct my_option *opt,
+                                    const char *name,
-                                    const char* arg)
+                                    const char *arg)
 {
-  dynstr_append(ds, opt->name);
+  dynstr_append(ds, name);
  if (arg)
  {
    dynstr_append(ds, "=");
@@ -320,7 +318,7 @@ get_one_option(int optid, const struct my_option *opt,
    if (argument)
    {
      /* Add password to ds_args before overwriting the arg with x's */
-      add_one_option_cnf_file(&ds_args, opt, argument);
+      add_one_option_cnf_file(&ds_args, opt->name, argument);
      while (*argument)
        *argument++= 'x';                       /* Destroy argument */
      tty_password= 0;
@@ -378,7 +376,7 @@ get_one_option(int optid, const struct my_option *opt,
  case OPT_MYSQL_PROTOCOL: /* --protocol */
  case OPT_PLUGIN_DIR:                          /* --plugin-dir */
  case OPT_DEFAULT_AUTH:                        /* --default-auth */
-    add_one_option_cmd_line(&conn_args, opt, argument);
+    add_one_option_cmd_line(&conn_args, opt->name, argument);
    break;
  }
@@ -389,7 +387,7 @@ get_one_option(int optid, const struct my_option *opt,
      it can be passed on to "mysql" and "mysqlcheck"
      Save it in the ds_args string
    */
-    add_one_option_cnf_file(&ds_args, opt, argument);
+    add_one_option_cnf_file(&ds_args, opt->name, argument);
  }
  return 0;
 }
@@ -1349,12 +1347,10 @@ int main(int argc, char **argv)
  {
    opt_password= get_tty_password(NullS);
    /* add password to defaults file */
-    add_one_option_cnf_file(&ds_args, &my_long_options[PASSWORD_OPT], opt_password);
+    add_one_option_cnf_file(&ds_args, "password", opt_password);
-    DBUG_ASSERT(strcmp(my_long_options[PASSWORD_OPT].name, "password") == 0);
  }
  /* add user to defaults file */
-  add_one_option_cnf_file(&ds_args, &my_long_options[USER_OPT], opt_user);
+  add_one_option_cnf_file(&ds_args, "user", opt_user);
-  DBUG_ASSERT(strcmp(my_long_options[USER_OPT].name, "user") == 0);
  cnf_file_path= strmov(defaults_file, "--defaults-file=");
  {

--- a/mysql-test/main/cte_nonrecursive.result
+++ b/mysql-test/main/cte_nonrecursive.result
@@ -2185,6 +2185,39 @@ select * from t1;
 a
 7
 drop table t1,t2;
+#
+# MDEV-25766: Unused CTE lead to a crash in
+# find_field_in_tables/find_order_in_list
+#
+create table t1 (f1 INTEGER);
+create view v1 as
+select
+subq_0.c4 as c2,
+subq_0.c4 as c4
+from
+(select
+ref_0.f1 as c4
+from
+t1 as ref_0
+where (select 1)
+) as subq_0
+order by c2, c4 desc;
+WITH
+unused_with AS (select
+subq_0.c4 as c6
+from
+(select
+11 as c4
+from
+v1 as ref_0
+) as subq_0,
+v1 as ref_2
+)
+select 1 ;
+1
+1
+drop view v1;
+drop table t1;
 # End of 10.2 tests
 #
 # MDEV-21673: several references to CTE that uses

--- a/mysql-test/main/cte_nonrecursive.test
+++ b/mysql-test/main/cte_nonrecursive.test
@@ -1625,6 +1625,42 @@ select * from t1;
 drop table t1,t2;
+--echo #
+--echo # MDEV-25766: Unused CTE lead to a crash in
+--echo # find_field_in_tables/find_order_in_list
+--echo #
+create table t1 (f1 INTEGER);
+create view v1 as
+select
+    subq_0.c4 as c2,
+    subq_0.c4 as c4
+  from
+    (select
+          ref_0.f1 as c4
+        from
+          t1 as ref_0
+        where (select 1)
+        ) as subq_0
+  order by c2, c4 desc;
+WITH
+unused_with AS (select
+    subq_0.c4 as c6
+  from
+    (select
+            11 as c4
+          from
+            v1 as ref_0
+     ) as subq_0,
+     v1 as ref_2
+)
+select 1 ;
+drop view v1;
+drop table t1;
 --echo # End of 10.2 tests
 --echo #

--- a/mysql-test/main/subselect4.result
+++ b/mysql-test/main/subselect4.result
@@ -1358,6 +1358,8 @@ INSERT IGNORE INTO t2 VALUES (8,0,0),(5,0,0);
 CREATE TABLE t3 (f4 int,KEY (f4)) ;
 INSERT IGNORE INTO t3 VALUES (0),(0);
 set @@optimizer_switch='semijoin=off';
+# NOTE: the following should have 'SUBQUERY', not 'DEPENDENT SUBQUERY'
+# for line with id=2, see MDEV-27794.
 EXPLAIN
 SELECT * FROM t1 WHERE
 (SELECT f2 FROM t2
@@ -1367,7 +1369,7 @@ FROM t3 AS SQ1_t1 JOIN t3 AS SQ1_t3 ON SQ1_t3.f4
 GROUP BY SQ1_t1.f4));
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	1	
-2	SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	2	Using where
+2	DEPENDENT SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	2	Using where
 3	SUBQUERY	SQ1_t1	index	NULL	f4	5	NULL	2	Using index; Using temporary
 3	SUBQUERY	SQ1_t3	index	f4	f4	5	NULL	2	Using where; Using index; Using join buffer (flat, BNL join)
 SELECT * FROM t1 WHERE

--- a/mysql-test/main/subselect4.test
+++ b/mysql-test/main/subselect4.test
@@ -1039,6 +1039,8 @@ INSERT IGNORE INTO t3 VALUES (0),(0);
 set @@optimizer_switch='semijoin=off';
+--echo # NOTE: the following should have 'SUBQUERY', not 'DEPENDENT SUBQUERY'
+--echo # for line with id=2, see MDEV-27794.
 EXPLAIN
 SELECT * FROM t1 WHERE
 (SELECT f2 FROM t2

--- a/mysql-test/main/tmp_table_error.result
+++ b/mysql-test/main/tmp_table_error.result
--- a/mysql-test/main/tmp_table_error.test
+++ b/mysql-test/main/tmp_table_error.test
--- a/mysql-test/main/union_innodb.result
+++ b/mysql-test/main/union_innodb.result
+#
+# MDEV-25636: Bug report: abortion in sql/sql_parse.cc:6294
+#
+CREATE TABLE t1 (i1 int)engine=innodb;
+INSERT INTO `t1` VALUES (62),(66);
+CREATE TABLE t2 (i1 int) engine=innodb;
+SELECT 1 FROM t1 
+WHERE t1.i1 =( SELECT t1.i1 FROM t2  
+UNION SELECT i1 FROM (t1 AS dt1 natural JOIN t2) 
+window w1 as (partition by t1.i1));
+1
+drop table t1,t2;
+# Another testcase
+CREATE TABLE t1 (i3 int NOT NULL, i1 int , i2 int , i4 int , PRIMARY key(i2));
+INSERT INTO t1 VALUES (6,72,98,98),(46,1,6952,0);
+SELECT i1 FROM t1 
+WHERE t1.i3 =
+(SELECT ref_4.i2 FROM t1 AS ref_4
+WHERE t1.i2 > (SELECT i3 FROM t1 ORDER BY i3 LIMIT 1 OFFSET 4)
+UNION 
+SELECT ref_6.i2
+FROM (t1 AS ref_5 JOIN t1 AS ref_6 ON ((ref_6.i1 > ref_6.i2) OR (ref_5.i4 < ref_5.i4)))
+WHERE (t1.i2 >= t1.i2));
+i1
+drop table t1;
+#
+# MDEV-25761: Assertion `aggr != __null' failed in sub_select_postjoin_aggr
+#
+CREATE TABLE t1 ( a int NOT NULL PRIMARY KEY) engine=innodb;
+INSERT INTO t1 VALUES (0),(4),(31);
+CREATE TABLE t2 (i int) engine=innodb;
+DELETE FROM t1 WHERE t1.a =
+(SELECT t1.a FROM t2 UNION SELECT DISTINCT 52 FROM t2 r WHERE t1.a = t1.a);
+DROP TABLE t1,t2;
--- a/mysql-test/main/union_innodb.test
+++ b/mysql-test/main/union_innodb.test
+--source include/have_innodb.inc
+--echo #
+--echo # MDEV-25636: Bug report: abortion in sql/sql_parse.cc:6294
+--echo #
+CREATE TABLE t1 (i1 int)engine=innodb;
+INSERT INTO `t1` VALUES (62),(66);
+CREATE TABLE t2 (i1 int) engine=innodb;
+SELECT 1 FROM t1 
+WHERE t1.i1 =( SELECT t1.i1 FROM t2  
+	UNION SELECT i1 FROM (t1 AS dt1 natural JOIN t2) 
+	window w1 as (partition by t1.i1));
+drop table t1,t2;
+--echo # Another testcase
+CREATE TABLE t1 (i3 int NOT NULL, i1 int , i2 int , i4 int , PRIMARY key(i2));
+INSERT INTO t1 VALUES (6,72,98,98),(46,1,6952,0);
+SELECT i1 FROM t1 
+WHERE t1.i3 =
+  (SELECT ref_4.i2 FROM t1 AS ref_4
+   	WHERE t1.i2 > (SELECT i3 FROM t1 ORDER BY i3 LIMIT 1 OFFSET 4)
+   UNION 
+   SELECT ref_6.i2
+   FROM (t1 AS ref_5 JOIN t1 AS ref_6 ON ((ref_6.i1 > ref_6.i2) OR (ref_5.i4 < ref_5.i4)))
+   WHERE (t1.i2 >= t1.i2));
+drop table t1;
+--echo #
+--echo # MDEV-25761: Assertion `aggr != __null' failed in sub_select_postjoin_aggr
+--echo #
+CREATE TABLE t1 ( a int NOT NULL PRIMARY KEY) engine=innodb;
+INSERT INTO t1 VALUES (0),(4),(31);
+CREATE TABLE t2 (i int) engine=innodb;
+DELETE FROM t1 WHERE t1.a =
+  (SELECT t1.a FROM t2 UNION SELECT DISTINCT 52 FROM t2 r WHERE t1.a = t1.a);
+DROP TABLE t1,t2;
--- a/mysql-test/main/win.result
+++ b/mysql-test/main/win.result
@@ -4198,6 +4198,38 @@ drop procedure sp7;
 drop view v1,v2;
 drop table t1;
 #
+# MDEV-17785: Window functions not working in ONLY_FULL_GROUP_BY mode
+#
+CREATE TABLE t1(a VARCHAR(10), b int);
+INSERT INTO t1 VALUES
+('Maths', 60),('Maths', 60),
+('Maths', 70),('Maths', 55),
+('Biology', 60), ('Biology', 70);
+SET @save_sql_mode= @@sql_mode;
+SET sql_mode = 'ONLY_FULL_GROUP_BY';
+SELECT
+RANK() OVER (PARTITION BY a ORDER BY b) AS rank,
+a, b FROM t1 ORDER BY a, b DESC;
+rank	a	b
+2	Biology	70
+1	Biology	60
+4	Maths	70
+2	Maths	60
+2	Maths	60
+1	Maths	55
+SET sql_mode= @save_sql_mode;
+DROP TABLE t1;
+CREATE TABLE t1(i int,j int);
+INSERT INTO t1 VALUES (1,1), (1,5),(1,4), (2,2),(2,5), (3,3),(4,4);
+INSERT INTO t1 VALUES (1,1), (1,5),(1,4), (2,2),(2,5), (3,3),(4,4);
+SELECT i, LAST_VALUE(COUNT(i)) OVER (PARTITION BY i ORDER BY j) FROM t1 GROUP BY i;
+i	LAST_VALUE(COUNT(i)) OVER (PARTITION BY i ORDER BY j)
+1	6
+2	4
+3	2
+4	2
+DROP TABLE t1;
+#
 # End of 10.2 tests
 #
 #

--- a/mysql-test/main/win.test
+++ b/mysql-test/main/win.test
@@ -2703,6 +2703,33 @@ drop procedure sp7;
 drop view v1,v2;
 drop table t1;
+--echo #
+--echo # MDEV-17785: Window functions not working in ONLY_FULL_GROUP_BY mode
+--echo #
+CREATE TABLE t1(a VARCHAR(10), b int);
+INSERT INTO t1 VALUES
+('Maths', 60),('Maths', 60),
+('Maths', 70),('Maths', 55),
+('Biology', 60), ('Biology', 70);
+SET @save_sql_mode= @@sql_mode;
+SET sql_mode = 'ONLY_FULL_GROUP_BY';
+SELECT
+  RANK() OVER (PARTITION BY a ORDER BY b) AS rank,
+  a, b FROM t1 ORDER BY a, b DESC;
+SET sql_mode= @save_sql_mode;
+DROP TABLE t1;
+CREATE TABLE t1(i int,j int);
+INSERT INTO t1 VALUES (1,1), (1,5),(1,4), (2,2),(2,5), (3,3),(4,4);
+INSERT INTO t1 VALUES (1,1), (1,5),(1,4), (2,2),(2,5), (3,3),(4,4);
+SELECT i, LAST_VALUE(COUNT(i)) OVER (PARTITION BY i ORDER BY j) FROM t1 GROUP BY i;
+DROP TABLE t1;
 --echo #
 --echo # End of 10.2 tests
 --echo #

--- a/mysql-test/mysql-test-run.pl
+++ b/mysql-test/mysql-test-run.pl
@@ -1747,7 +1747,7 @@ sub collect_mysqld_features_from_running_server ()
  }
  mtr_add_arg($args, "--silent"); # Tab separated output
-  mtr_add_arg($args, "-e '%s'", "use mysql; SHOW VARIABLES");
+  mtr_add_arg($args, "-e \"use mysql; SHOW VARIABLES\"");
  my $cmd= "$mysql " . join(' ', @$args);
  mtr_verbose("cmd: $cmd");

--- a/mysql-test/suite/encryption/r/tempfiles_encrypted.result
+++ b/mysql-test/suite/encryption/r/tempfiles_encrypted.result
@@ -4204,6 +4204,38 @@ drop procedure sp7;
 drop view v1,v2;
 drop table t1;
 #
+# MDEV-17785: Window functions not working in ONLY_FULL_GROUP_BY mode
+#
+CREATE TABLE t1(a VARCHAR(10), b int);
+INSERT INTO t1 VALUES
+('Maths', 60),('Maths', 60),
+('Maths', 70),('Maths', 55),
+('Biology', 60), ('Biology', 70);
+SET @save_sql_mode= @@sql_mode;
+SET sql_mode = 'ONLY_FULL_GROUP_BY';
+SELECT
+RANK() OVER (PARTITION BY a ORDER BY b) AS rank,
+a, b FROM t1 ORDER BY a, b DESC;
+rank	a	b
+2	Biology	70
+1	Biology	60
+4	Maths	70
+2	Maths	60
+2	Maths	60
+1	Maths	55
+SET sql_mode= @save_sql_mode;
+DROP TABLE t1;
+CREATE TABLE t1(i int,j int);
+INSERT INTO t1 VALUES (1,1), (1,5),(1,4), (2,2),(2,5), (3,3),(4,4);
+INSERT INTO t1 VALUES (1,1), (1,5),(1,4), (2,2),(2,5), (3,3),(4,4);
+SELECT i, LAST_VALUE(COUNT(i)) OVER (PARTITION BY i ORDER BY j) FROM t1 GROUP BY i;
+i	LAST_VALUE(COUNT(i)) OVER (PARTITION BY i ORDER BY j)
+1	6
+2	4
+3	2
+4	2
+DROP TABLE t1;
+#
 # End of 10.2 tests
 #
 #

--- a/mysql-test/suite/rpl/t/rpl_relay_max_extension.test
+++ b/mysql-test/suite/rpl/t/rpl_relay_max_extension.test
@@ -28,6 +28,8 @@
 #            showed
 #
+# MDEV-27721 rpl.rpl_relay_max_extension test is not FreeBSD-compatible
+--source include/linux.inc
 --source include/have_innodb.inc
 --source include/have_binlog_format_row.inc
 --let $rpl_topology=1->2

--- a/scripts/wsrep_sst_mariabackup.sh
+++ b/scripts/wsrep_sst_mariabackup.sh
-#!/bin/bash -ue
+#!/usr/bin/env bash
+set -ue
 # Copyright (C) 2017-2021 MariaDB
 # Copyright (C) 2013 Percona Inc
 #

--- a/scripts/wsrep_sst_mysqldump.sh
+++ b/scripts/wsrep_sst_mysqldump.sh
-#!/bin/bash -ue
+#!/usr/bin/env bash
+set -ue
 # Copyright (C) 2009-2015 Codership Oy
 # Copyright (C) 2017-2021 MariaDB
 #

--- a/scripts/wsrep_sst_rsync.sh
+++ b/scripts/wsrep_sst_rsync.sh
-#!/bin/bash -ue
+#!/usr/bin/env bash
+set -ue
 # Copyright (C) 2017-2021 MariaDB
 # Copyright (C) 2010-2014 Codership Oy
@@ -740,7 +742,7 @@ EOF
            elif [ "$OS" = 'Linux' ]; then
               tmpfile=$(mktemp "--tmpdir=$tmpdir")
            else
-               tmpfile=$(TMPDIR="$tmpdir"; mktemp '-d')
+               tmpfile=$(TMPDIR="$tmpdir"; mktemp)
            fi
            wsrep_log_info "Extracting binlog files:"

--- a/sql/item_windowfunc.cc
+++ b/sql/item_windowfunc.cc
@@ -109,6 +109,8 @@ Item_window_func::fix_fields(THD *thd, Item **ref)
    return true;
  }
+  window_func()->mark_as_window_func_sum_expr();
  /*
    TODO: why the last parameter is 'ref' in this call? What if window_func
    decides to substitute itself for something else and does *ref=.... ? 

--- a/sql/records.cc
+++ b/sql/records.cc
@@ -321,7 +321,7 @@ void end_read_record(READ_RECORD *info)
  free_cache(info);
  if (info->table)
  {
-    if (info->table->is_created())
+    if (info->table->db_stat) // if opened
      (void) info->table->file->extra(HA_EXTRA_NO_CACHE);
    if (info->read_record_func != rr_quick) // otherwise quick_range does it
      (void) info->table->file->ha_index_or_rnd_end();

--- a/sql/sql_base.cc
+++ b/sql/sql_base.cc
@@ -6475,9 +6475,10 @@ find_field_in_tables(THD *thd, Item_ident *item,
             sl=sl->outer_select())
        {
          Item *subs= sl->master_unit()->item;
-          if (subs->type() == Item::SUBSELECT_ITEM && 
+          if (!subs ||
+              (subs->type() == Item::SUBSELECT_ITEM &&
               ((Item_subselect*)subs)->substype() == Item_subselect::IN_SUBS &&
-              ((Item_in_subselect*)subs)->test_strategy(SUBS_SEMI_JOIN))
+               ((Item_in_subselect*)subs)->test_strategy(SUBS_SEMI_JOIN)))
          {
            continue;
          }

--- a/sql/sql_lex.cc
+++ b/sql/sql_lex.cc
@@ -4264,7 +4264,21 @@ bool st_select_lex::optimize_unflattened_subqueries(bool const_only)
      }
      if (empty_union_result)
        subquery_predicate->no_rows_in_result();
-      if (!is_correlated_unit)
+      if (is_correlated_unit)
+      {
+        /*
+          Some parts of UNION are not correlated. This means we will need to
+          re-execute the whole UNION every time. Mark all parts of the UNION
+          as correlated so that they are prepared to be executed multiple
+          times (if we don't do that, some part of the UNION may free its
+          execution data at the end of first execution and crash on the second
+          execution)
+        */
+        for (SELECT_LEX *sl= un->first_select(); sl; sl= sl->next_select())
+          sl->uncacheable |= UNCACHEABLE_DEPENDENT;
+      }
+      else
        un->uncacheable&= ~UNCACHEABLE_DEPENDENT;
      subquery_predicate->is_correlated= is_correlated_unit;
    }

--- a/sql/sql_yacc.yy
+++ b/sql/sql_yacc.yy
@@ -11693,9 +11693,6 @@ window_func:
          simple_window_func
        |
          sum_expr
-          {
-            ((Item_sum *) $1)->mark_as_window_func_sum_expr();
-          }
        |
          function_call_generic
          {
@@ -11708,8 +11705,6 @@ window_func:
              thd->parse_error();
              MYSQL_YYABORT;
            }
-            ((Item_sum *) $1)->mark_as_window_func_sum_expr();
          }
        ;

--- a/sql/sql_yacc_ora.yy
+++ b/sql/sql_yacc_ora.yy
@@ -11791,9 +11791,6 @@ window_func:
          simple_window_func
        |
          sum_expr
-          {
-            ((Item_sum *) $1)->mark_as_window_func_sum_expr();
-          }
        |
          function_call_generic
          {
@@ -11806,8 +11803,6 @@ window_func:
              thd->parse_error();
              MYSQL_YYABORT;
            }
-            ((Item_sum *) $1)->mark_as_window_func_sum_expr();
          }
        ;

--- a/storage/maria/ma_create.c
+++ b/storage/maria/ma_create.c
@@ -718,9 +718,10 @@ int maria_create(const char *name, enum data_file_type datafile_type,
    share.base.extra_options|= MA_EXTRA_OPTIONS_INSERT_ORDER;
  }
+  share.state.state.key_file_length= MY_ALIGN(info_length, maria_block_size);
  DBUG_PRINT("info", ("info_length: %u", info_length));
  /* There are only 16 bits for the total header length. */
-  if (info_length > 65535)
+  if (share.state.state.key_file_length > 65535)
  {
    my_printf_error(HA_WRONG_CREATE_OPTION,
                    "Aria table '%s' has too many columns and/or "
@@ -777,8 +778,7 @@ int maria_create(const char *name, enum data_file_type datafile_type,
  maria_set_all_keys_active(share.state.key_map, keys);
-  share.base.keystart = share.state.state.key_file_length=
+  share.base.keystart = share.state.state.key_file_length;
-    MY_ALIGN(info_length, maria_block_size);
  share.base.max_key_block_length= maria_block_size;
  share.base.max_key_length=ALIGN_SIZE(max_key_length+4);
  share.base.records=ci->max_rows;