Introduced parameter object "ALTER_INFO" for mysql_alter_table

to make list of parameters in mysql_alter_table shorted
to avoid warning in MSVC (windows) building 


sql/mysql_priv.h:
  Introduced parameter object "ALTER_INFO" for mysql_alter_table
  - changed declaration of mysql_alter_table
  - changed declaration of mysql_drop_index 
    (replaced List<Alter_drop> by ALTER_INFO)
sql/sql_lex.h:
  Introduced parameter object "ALTER_INFO" for mysql_alter_table
  - declared struct ALTER_INFO
  - added ALTER_INFO alter_info; into LEX
  - removed fields which were added into ALTER_INFO from LEX
sql/sql_parse.cc:
  Introduced parameter object "ALTER_INFO" for mysql_alter_table
  - changed invotaions of mysql_alter_table
  - replaced cleaning fields in SQLCOM_OPTIMIZE by ALTER_INFO::reset
  - changed invocation of mysql_drop_index (replaced lex->drop_list by &lex->alter_info)
  - changed definition of mysql_create_index and mysql_drop_index to use ALTER_INFO
sql/sql_table.cc:
  Introduced parameter object "ALTER_INFO" for mysql_alter_table
  - changed definition of mysql_alter_table
sql/sql_yacc.yy:
  Introduced parameter object "ALTER_INFO" for mysql_alter_table
  - replaced using of removed from LEX fields my fields of LEX::alter_info

1 files changed, 16 insertions, 6 deletions

diff --git a/sql/sql_lex.h b/sql/sql_lex.h
index 2df2c998ff0..bc2a5a9201b 100644
--- a/sql/sql_lex.h
+++ b/sql/sql_lex.h
@@ -532,6 +532,20 @@ typedef class st_select_lex SELECT_LEX;
 #define ALTER_ORDER		64
 #define ALTER_OPTIONS		128
 
+typedef struct st_alter_info
+{
+  List<Alter_drop>            drop_list;
+  List<Alter_column>          alter_list;
+  uint                        flags;
+  enum enum_enable_or_disable keys_onoff;
+  enum tablespace_op_type     tablespace_op;
+  bool                        is_simple;
+
+  st_alter_info(){clear();}
+  void clear(){keys_onoff= LEAVE_AS_IS;tablespace_op= NO_TABLESPACE_OP;}
+  void reset(){drop_list.empty();alter_list.empty();clear();}
+} ALTER_INFO;
+
 /* The state of the lex parsing. This is saved in the THD struct */
 
 typedef struct st_lex
@@ -564,8 +578,6 @@ typedef struct st_lex
 
   List<key_part_spec> col_list;
   List<key_part_spec> ref_list;
-  List<Alter_drop>    drop_list;
-  List<Alter_column>  alter_list;
   List<String>	      interval_list;
   List<LEX_USER>      users_list;
   List<LEX_COLUMN>    columns;
@@ -593,19 +605,17 @@ typedef struct st_lex
   enum enum_tx_isolation tx_isolation;
   enum enum_ha_read_modes ha_read_mode;
   enum ha_rkey_function ha_rkey_mode;
-  enum enum_enable_or_disable alter_keys_onoff;
   enum enum_var_type option_type;
-  enum tablespace_op_type tablespace_op;
   uint uint_geom_type;
   uint grant, grant_tot_col, which_columns;
   uint fk_delete_opt, fk_update_opt, fk_match_option;
   uint slave_thd_opt;
-  uint alter_flags;
   uint8 describe;
   bool drop_if_exists, drop_temporary, local_file;
-  bool in_comment, ignore_space, verbose, simple_alter, no_write_to_binlog;
+  bool in_comment, ignore_space, verbose, no_write_to_binlog;
   bool derived_tables;
   bool safe_to_cache_query;
+  ALTER_INFO alter_info;
   st_lex() {}
   inline void uncacheable(uint8 cause)
   {