system_variables_bits.h

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/* Copyright (c) 2008, 2025, Oracle and/or its affiliates.
 
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  it under the terms of the GNU General Public License, version 2.0,
  as published by the Free Software Foundation.
 
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  documentation.  The authors of MySQL hereby grant you an additional
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  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License, version 2.0, for more details.
 
  You should have received a copy of the GNU General Public License
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  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */
 
#ifndef COMPONENTS_SERVICES_BITS_SYSTEM_VARIABLES_BITS_H
#define COMPONENTS_SERVICES_BITS_SYSTEM_VARIABLES_BITS_H
 
/**
  @addtogroup group_components_services_sys_var_service_types Variable types
 
  Possible system variable types. Use at most one of these.
 
  @sa mysql_service_component_sys_variable_register service.
 
  @{
*/
 
/** bool variable. Use @ref BOOL_CHECK_ARG */
#define PLUGIN_VAR_BOOL 0x0001
/** int variable. Use @ref INTEGRAL_CHECK_ARG */
#define PLUGIN_VAR_INT 0x0002
/** long variable Use @ref INTEGRAL_CHECK_ARG */
#define PLUGIN_VAR_LONG 0x0003
/** longlong variable. Use @ref INTEGRAL_CHECK_ARG */
#define PLUGIN_VAR_LONGLONG 0x0004
/** char * variable. Use @ref STR_CHECK_ARG */
#define PLUGIN_VAR_STR 0x0005
/** Enum variable. Use @ref ENUM_CHECK_ARG */
#define PLUGIN_VAR_ENUM 0x0006
/** A set variable. Use @ref ENUM_CHECK_ARG */
#define PLUGIN_VAR_SET 0x0007
/** double variable. Use @ref INTEGRAL_CHECK_ARG */
#define PLUGIN_VAR_DOUBLE 0x0008
/** @} */
/**
  @addtogroup group_components_services_sys_var_service_flags Variable flags
 
  Flags to specify the behavior of system variables. Use multiple as needed.
 
  @sa mysql_service_component_sys_variable_register service.
 
  @{
*/
#define PLUGIN_VAR_UNSIGNED 0x0080  /**< The variable is unsigned */
#define PLUGIN_VAR_THDLOCAL 0x0100  /**< Variable is per-connection */
#define PLUGIN_VAR_READONLY 0x0200  /**< Server variable is read only */
#define PLUGIN_VAR_NOSYSVAR 0x0400  /**< Not a server variable */
#define PLUGIN_VAR_NOCMDOPT 0x0800  /**< Not a command line option */
#define PLUGIN_VAR_NOCMDARG 0x1000  /**< No argument for cmd line */
#define PLUGIN_VAR_RQCMDARG 0x0000  /**< Argument required for cmd line */
#define PLUGIN_VAR_OPCMDARG 0x2000  /**< Argument optional for cmd line */
#define PLUGIN_VAR_NODEFAULT 0x4000 /**< SET DEFAULT is prohibited */
#define PLUGIN_VAR_MEMALLOC 0x8000  /**< String needs memory allocated */
#define PLUGIN_VAR_NOPERSIST \
  0x10000 /**< SET PERSIST_ONLY is prohibited for read only variables */
#define PLUGIN_VAR_PERSIST_AS_READ_ONLY 0x20000
#define PLUGIN_VAR_INVISIBLE 0x40000 /**< Variable should not be shown */
#define PLUGIN_VAR_SENSITIVE 0x80000 /**< Sensitive variable */
/** @} */
 
/**
  st_mysql_value struct for reading values from mysqld.
  Used by server variables framework to parse user-provided values.
  Will be used for arguments when implementing UDFs.
 
  Note that val_str() returns a string in temporary memory
  that will be freed at the end of statement. Copy the string
  if you need it to persist.
*/
 
#define MYSQL_VALUE_TYPE_STRING 0
#define MYSQL_VALUE_TYPE_REAL 1
#define MYSQL_VALUE_TYPE_INT 2
 
struct st_mysql_value {
  int (*value_type)(struct st_mysql_value *);
  const char *(*val_str)(struct st_mysql_value *, char *buffer, int *length);
  int (*val_real)(struct st_mysql_value *, double *realbuf);
  int (*val_int)(struct st_mysql_value *, long long *intbuf);
  int (*is_unsigned)(struct st_mysql_value *);
};
 
#endif /* COMPONENTS_SERVICES_BITS_SYSTEM_VARIABLES_BITS_H */