Added support for key_block_size for key and table level (WL#602)

Added support for key_block_size to MyISAM.
Simplify interface to 'new Key' to make it easier to add new key options.
mysqld option --new is used to define where key options are printed.
(In 5.3 we should move all key options to after key part definition to avoid problem with reserved names)
Fixed some compiler warnings and a memory leak in ssl


include/my_base.h:
  Added flag to check if block size for key was secified
include/my_sys.h:
  Added new support function to round up to a power of two
include/myisam.h:
  Rename block_size -> block_size_index to avoid confusion with 'block_size'
include/violite.h:
  Added function to free memory after new_VioSSLAcceptorFd
  (Will rename all vio_ssl functions in a future changeset)
mysql-test/mysql-test-run.pl:
  Don't print port number info when we use --extern
mysql-test/r/myisam.result:
  Added test for key_block_size
mysql-test/t/myisam.test:
  Added test for key_block_size
mysys/mf_keycache.c:
  Simplify code
mysys/my_bit.c:
  Added new support function to round up to a power of two
sql/ha_myisam.cc:
  Tell MyISAM to use the specified key_block_size
  MyISAM also updates the global key_block_size from the used values.
sql/handler.cc:
  Added 'default_key_create_info' to be used as 'dummy' argument to 'new Key'
sql/handler.h:
  Added KEY_CREATE_INFO, to be used as for general options for KEY's
sql/item_func.h:
  Removed compiler warning
sql/lex.h:
  Added new symbol
sql/mysqld.cc:
  Fixed memory leak in ssl (new_VioSSLAcceptorFd)
sql/sql_class.h:
  Change 'new Key' to use KEY_CREATE_INFO instead of 'algoritm', parser, key_page_size.
  This makes it easier to add new key options in the future.
sql/sql_lex.h:
  Added key create options
sql/sql_parse.cc:
  Use new interface to 'new Key'
sql/sql_show.cc:
  Added support for key_block_size
  If --new is used, key options are printed after the key part definition.
sql/sql_table.cc:
  Use new interface to 'new Key'
  Add support for key_block_size
sql/sql_yacc.yy:
  Add support for key_block_size
  Allow key options before and after key_parts (In future they should be always after the key_part defintion)
  Use new interface to 'new Key'
sql/structs.h:
  Added block_size to keys
sql/table.cc:
  Remmeber and read key_block_size for table and key level
sql/table.h:
  Added default key_block_size for table
sql/unireg.cc:
  Remember key_block_size for key
storage/myisam/ft_eval.c:
  Set block_length to 0 to get default key page size
storage/myisam/ft_test1.c:
  Set block_length to 0 to get default key page size
storage/myisam/mi_check.c:
  block_size -> block_size_index
storage/myisam/mi_create.c:
  Added support for block size per key.
  Block size is rounded up to next power of two and enforced between MIN and MAX KEY_BLOCK_LENGTH.
  Align start of key block to start at an even offset of max_key_block_length to ensure key cache works good if all key pages are of same size.
storage/myisam/mi_open.c:
  block_size -> block_size_index
storage/myisam/mi_page.c:
  block_size -> block_size_index
storage/myisam/mi_test1.c:
  Set block_length to 0 to get default key page size
storage/myisam/mi_test2.c:
  Set block_length to 0 to get default key page size
storage/myisam/mi_test3.c:
  Set block_length to 0 to get default key page size
storage/myisam/myisamdef.h:
  block_size -> block_size_index to avoid confusion with 'block_size' in MySQL
  Added block_size as argument to MI_BLOCK_SIZE
  Added missing prototypes to get rid of compiler warnings
storage/myisam/myisampack.c:
  Removed compiler warning
  block_size -> block_size_index
vio/viosslfactories.c:
  Fixed memory leak in ssl (new_VioSSLAcceptorFd)
mysql-test/r/myisam-system.result:
  New BitKeeper file ``mysql-test/r/myisam-system.result''
mysql-test/t/myisam-system.test:
  New BitKeeper file ``mysql-test/t/myisam-system.test''

sql/handler.h

@@ -280,6 +280,7 @@ enum enum_binlog_command {
 #define HA_CREATE_USED_COMMENT          (1L << 16)
 #define HA_CREATE_USED_PASSWORD         (1L << 17)
 #define HA_CREATE_USED_CONNECTION       (1L << 18)
+#define HA_CREATE_USED_KEY_BLOCK_SIZE   (1L << 19)
 
 typedef ulonglong my_xid; // this line is the same as in log_event.h
 #define MYSQL_XID_PREFIX "MySQLXid"
@@ -653,6 +654,7 @@ typedef struct st_ha_create_information
   ulong table_options;
   ulong avg_row_length;
   ulong used_fields;
+  ulong key_block_size;
   SQL_LIST merge_list;
   handlerton *db_type;
   enum row_type row_type;
@@ -666,6 +668,15 @@ typedef struct st_ha_create_information
   bool store_on_disk;                   /* 1 if table stored on disk */
 } HA_CREATE_INFO;
 
+
+typedef struct st_key_create_information
+{
+  enum ha_key_alg algorithm;
+  ulong block_size;
+  LEX_STRING parser_name;
+} KEY_CREATE_INFO;
+
+
 /*
   Class for maintaining hooks used inside operations on tables such
   as: create table functions, delete table functions, and alter table
@@ -700,6 +711,7 @@ private:
 
 typedef struct st_savepoint SAVEPOINT;
 extern ulong savepoint_alloc_size;
+extern KEY_CREATE_INFO default_key_create_info;
 
 /* Forward declaration for condition pushdown to storage engine */
 typedef class Item COND;