Current File : //usr/include/mysql/server/private/sql_i_s.h
#ifndef SQL_I_S_INCLUDED
#define SQL_I_S_INCLUDED
/* Copyright (c) 2000, 2017, Oracle and/or its affiliates.
Copyright (c) 2009, 2019, MariaDB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */
#include "sql_const.h" // MAX_FIELD_VARCHARLENGTH
#include "sql_basic_types.h" // enum_nullability
#include "sql_string.h" // strlen, MY_CS_NAME_SIZE
#include "lex_string.h" // LEX_CSTRING
#include "mysql_com.h" // enum_field_types
#include "my_time.h" // TIME_SECOND_PART_DIGITS
#include "sql_type.h" // Type_handler_xxx
struct TABLE_LIST;
struct TABLE;
typedef class Item COND;
#ifdef MYSQL_CLIENT
#error MYSQL_CLIENT must not be defined
#endif // MYSQL_CLIENT
bool schema_table_store_record(THD *thd, TABLE *table);
COND *make_cond_for_info_schema(THD *thd, COND *cond, TABLE_LIST *table);
enum enum_show_open_table
{
SKIP_OPEN_TABLE= 0U, // do not open table
OPEN_FRM_ONLY= 1U, // open FRM file only
OPEN_FULL_TABLE= 2U // open FRM,MYD, MYI files
};
namespace Show {
class Type
{
/**
This denotes data type for the column. For the most part, there seems to
be one entry in the enum for each SQL data type, although there seem to
be a number of additional entries in the enum.
*/
const Type_handler *m_type_handler;
/**
For string-type columns, this is the maximum number of
characters. Otherwise, it is the 'display-length' for the column.
*/
uint m_char_length;
uint m_unsigned_flag;
const Typelib *m_typelib;
public:
Type(const Type_handler *th, uint length, uint unsigned_flag,
const Typelib *typelib= NULL)
:m_type_handler(th), m_char_length(length), m_unsigned_flag(unsigned_flag),
m_typelib(typelib)
{ }
const Type_handler *type_handler() const { return m_type_handler; }
uint char_length() const { return m_char_length; }
decimal_digits_t decimal_precision() const
{ return (decimal_digits_t) ((m_char_length / 100) % 100); }
decimal_digits_t decimal_scale() const
{ return (decimal_digits_t) (m_char_length % 10); }
uint fsp() const
{
DBUG_ASSERT(m_char_length <= TIME_SECOND_PART_DIGITS);
return m_char_length;
}
uint unsigned_flag() const { return m_unsigned_flag; }
const Typelib *typelib() const { return m_typelib; }
};
} // namespace Show
class ST_FIELD_INFO: public Show::Type
{
protected:
LEX_CSTRING m_name; // I_S column name
enum_nullability m_nullability; // NULLABLE or NOT NULL
LEX_CSTRING m_old_name; // SHOW column name
enum_show_open_table m_open_method;
public:
ST_FIELD_INFO(const LEX_CSTRING &name, const Type &type,
enum_nullability nullability,
LEX_CSTRING &old_name,
enum_show_open_table open_method)
:Type(type), m_name(name),
m_nullability(nullability),
m_old_name(old_name),
m_open_method(open_method)
{ }
ST_FIELD_INFO(const char *name, const Type &type,
enum_nullability nullability,
const char *old_name,
enum_show_open_table open_method)
:Type(type),
m_nullability(nullability),
m_open_method(open_method)
{
m_name.str= name;
m_name.length= safe_strlen(name);
m_old_name.str= old_name;
m_old_name.length= safe_strlen(old_name);
}
const LEX_CSTRING &name() const { return m_name; }
bool nullable() const { return m_nullability == NULLABLE; }
const LEX_CSTRING &old_name() const { return m_old_name; }
enum_show_open_table open_method() const { return m_open_method; }
bool end_marker() const { return m_name.str == NULL; }
};
namespace Show
{
class Enum: public Type
{
public:
Enum(const Typelib *typelib) :Type(&type_handler_enum, 0, false, typelib) { }
};
class Blob: public Type
{
public:
Blob(uint length) :Type(&type_handler_blob, length, false) { }
};
class Varchar: public Type
{
public:
Varchar(uint length) :Type(&type_handler_varchar, length, false)
{
DBUG_ASSERT(length * 3 <= MAX_FIELD_VARCHARLENGTH);
}
};
class Longtext: public Type
{
public:
Longtext(uint length) :Type(&type_handler_varchar, length, false) { }
};
class Yes_or_empty: public Varchar
{
public:
Yes_or_empty(): Varchar(3) { }
};
class Catalog: public Varchar
{
public:
Catalog(): Varchar(FN_REFLEN) { }
};
class Name: public Varchar
{
public:
Name(): Varchar(NAME_CHAR_LEN) { }
};
class Definer: public Varchar
{
public:
Definer(): Varchar(DEFINER_CHAR_LENGTH) { }
};
class Userhost: public Varchar
{
public:
Userhost(): Varchar(USERNAME_CHAR_LENGTH + HOSTNAME_LENGTH + 2) { }
};
class CSName: public Varchar
{
public:
CSName(): Varchar(MY_CS_NAME_SIZE) { }
};
class SQLMode: public Varchar
{
public:
SQLMode(): Varchar(32*256) { }
};
class Datetime: public Type
{
public:
Datetime(uint dec) :Type(&type_handler_datetime2, dec, false) { }
};
class Decimal: public Type
{
public:
Decimal(uint length) :Type(&type_handler_newdecimal, length, false) { }
};
class ULonglong: public Type
{
public:
ULonglong(uint length) :Type(&type_handler_ulonglong, length, true) { }
ULonglong() :ULonglong(MY_INT64_NUM_DECIMAL_DIGITS) { }
};
class ULong: public Type
{
public:
ULong(uint length) :Type(&type_handler_ulong, length, true) { }
ULong() :ULong(MY_INT32_NUM_DECIMAL_DIGITS) { }
};
class SLonglong: public Type
{
public:
SLonglong(uint length) :Type(&type_handler_slonglong, length, false) { }
SLonglong() :SLonglong(MY_INT64_NUM_DECIMAL_DIGITS) { }
};
class SLong: public Type
{
public:
SLong(uint length) :Type(&type_handler_slong, length, false) { }
SLong() :SLong(MY_INT32_NUM_DECIMAL_DIGITS) { }
};
class SShort: public Type
{
public:
SShort(uint length) :Type(&type_handler_sshort, length, false) { }
};
class STiny: public Type
{
public:
STiny(uint length) :Type(&type_handler_stiny, length, false) { }
};
class Double: public Type
{
public:
Double(uint length) :Type(&type_handler_double, length, false) { }
};
class Float: public Type
{
public:
Float(uint length) :Type(&type_handler_float, length, false) { }
};
class Column: public ST_FIELD_INFO
{
public:
Column(const char *name, const Type &type,
enum_nullability nullability,
const char *old_name,
enum_show_open_table open_method= SKIP_OPEN_TABLE)
:ST_FIELD_INFO(name, type, nullability,
old_name, open_method)
{ }
Column(const char *name, const Type &type,
enum_nullability nullability,
enum_show_open_table open_method= SKIP_OPEN_TABLE)
:ST_FIELD_INFO(name, type, nullability,
NullS, open_method)
{ }
};
// End marker
class CEnd: public Column
{
public:
CEnd() :Column(NullS, Varchar(0), NOT_NULL, NullS, SKIP_OPEN_TABLE) { }
};
} // namespace Show
struct TABLE_LIST;
typedef class Item COND;
typedef struct st_schema_table
{
const char *table_name;
ST_FIELD_INFO *fields_info;
/* for FLUSH table_name */
int (*reset_table) ();
/* Fill table with data */
int (*fill_table) (THD *thd, TABLE_LIST *tables, COND *cond);
/* Handle fileds for old SHOW */
int (*old_format) (THD *thd, struct st_schema_table *schema_table);
int (*process_table) (THD *thd, TABLE_LIST *tables, TABLE *table,
bool res, const LEX_CSTRING *db_name,
const LEX_CSTRING *table_name);
int idx_field1, idx_field2;
bool hidden;
uint i_s_requested_object; /* the object we need to open(TABLE | VIEW) */
} ST_SCHEMA_TABLE;
#endif // SQL_I_S_INCLUDED
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