Ensure that one can't from the command line set a variable too small. (Bug #2710)

Allow one to force lower_case_table_names to 0, even if the file system is case insensitive. This fixes some issues on Mac OS X (Bug #2994)
Added variables "lower_case_file_system", "version_compile_os" and "license"


mysql-test/t/lowercase_table3-master.opt:
  Rename: mysql-test/t/lowercase_table2-master.opt -> mysql-test/t/lowercase_table3-master.opt
mysys/my_getopt.c:
  Ensure that one can't from the command line set a variable too small (could happen when sub_size was set)
sql/mysql_priv.h:
  Added lower_case_file_system
sql/mysqld.cc:
  Allow one to force lower_case_table_names to 0, even if the file system is case insensitive
sql/set_var.cc:
  Added variable "lower_case_file_system"
  Added variable "version_compile_os"
  Added variable "license"
sql/set_var.h:
  Added support for read only strings
sql/sql_select.cc:
  Make join optimizer killable

1 files changed, 25 insertions, 0 deletions

diff --git a/sql/set_var.h b/sql/set_var.h
index e22c55276a7..08e3f20fdb4 100644
--- a/sql/set_var.h
+++ b/sql/set_var.h
@@ -156,6 +156,31 @@ public:
 };
 
 
+class sys_var_const_str :public sys_var
+{
+public:
+  char *value;					// Pointer to const value
+  sys_var_const_str(const char *name_arg, const char *value_arg)
+    :sys_var(name_arg), value((char*) value_arg)
+  {}
+  bool check(THD *thd, set_var *var)
+  {
+    return 1;
+  }
+  bool update(THD *thd, set_var *var)
+  {
+    return 1;
+  }
+  SHOW_TYPE type() { return SHOW_CHAR; }
+  byte *value_ptr(THD *thd, enum_var_type type) { return (byte*) value; }
+  bool check_update_type(Item_result type)
+  {
+    return 1;
+  }
+  bool check_default(enum_var_type type) { return 1; }
+};
+
+
 class sys_var_enum :public sys_var
 {
   uint	*value;