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#ifndef PROTOCOL_INCLUDED
#define PROTOCOL_INCLUDED
/* Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
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 */
#ifdef USE_PRAGMA_INTERFACE
#pragma interface /* gcc class implementation */
#endif
#include "sql_error.h"
#include "my_decimal.h" /* my_decimal */
class i_string;
class Field;
class THD;
class Item_param;
typedef struct st_mysql_field MYSQL_FIELD;
typedef struct st_mysql_rows MYSQL_ROWS;
class Protocol
{
protected:
String *packet;
/* Used by net_store_data() for charset conversions */
String *convert;
uint field_pos;
#ifndef DBUG_OFF
enum enum_field_types *field_types;
#endif
uint field_count;
#ifndef EMBEDDED_LIBRARY
bool net_store_data(const uchar *from, size_t length);
bool net_store_data_cs(const uchar *from, size_t length,
CHARSET_INFO *fromcs, CHARSET_INFO *tocs);
#else
virtual bool net_store_data(const uchar *from, size_t length);
virtual bool net_store_data_cs(const uchar *from, size_t length,
CHARSET_INFO *fromcs, CHARSET_INFO *tocs);
char **next_field;
MYSQL_FIELD *next_mysql_field;
MEM_ROOT *alloc;
#endif
/*
The following two are low-level functions that are invoked from
higher-level store_xxx() funcs. The data is stored into this->packet.
*/
bool store_string_aux(const char *from, size_t length,
CHARSET_INFO *fromcs, CHARSET_INFO *tocs);
virtual bool send_ok(uint server_status, uint statement_warn_count,
ulonglong affected_rows, ulonglong last_insert_id,
const char *message, bool skip_flush);
virtual bool send_eof(uint server_status, uint statement_warn_count);
virtual bool send_error(uint sql_errno, const char *err_msg,
const char *sql_state);
public:
THD *thd;
Protocol(THD *thd_arg) { init(thd_arg); }
virtual ~Protocol() {}
void init(THD* thd_arg);
enum { SEND_NUM_ROWS= 1, SEND_DEFAULTS= 2, SEND_EOF= 4 };
virtual bool send_result_set_metadata(List<Item> *list, uint flags);
bool send_result_set_row(List<Item> *row_items);
bool store(I_List<i_string> *str_list);
bool store(const char *from, CHARSET_INFO *cs);
String *storage_packet() { return packet; }
inline void free() { packet->free(); }
virtual bool write();
inline bool store(int from)
{ return store_long((longlong) from); }
inline bool store(uint32 from)
{ return store_long((longlong) from); }
inline bool store(longlong from)
{ return store_longlong((longlong) from, 0); }
inline bool store(ulonglong from)
{ return store_longlong((longlong) from, 1); }
inline bool store(String *str)
{ return store((char*) str->ptr(), str->length(), str->charset()); }
virtual bool prepare_for_send(uint num_columns)
{
field_count= num_columns;
return 0;
}
virtual bool flush();
virtual void end_partial_result_set(THD *thd);
virtual void prepare_for_resend()=0;
virtual bool store_null()=0;
virtual bool store_tiny(longlong from)=0;
virtual bool store_short(longlong from)=0;
virtual bool store_long(longlong from)=0;
virtual bool store_longlong(longlong from, bool unsigned_flag)=0;
virtual bool store_decimal(const my_decimal *)=0;
virtual bool store(const char *from, size_t length, CHARSET_INFO *cs)=0;
virtual bool store(const char *from, size_t length,
CHARSET_INFO *fromcs, CHARSET_INFO *tocs)=0;
virtual bool store(float from, uint32 decimals, String *buffer)=0;
virtual bool store(double from, uint32 decimals, String *buffer)=0;
virtual bool store(MYSQL_TIME *time, int decimals)=0;
virtual bool store_date(MYSQL_TIME *time)=0;
virtual bool store_time(MYSQL_TIME *time, int decimals)=0;
virtual bool store(Field *field)=0;
virtual bool send_out_parameters(List<Item_param> *sp_params)=0;
#ifdef EMBEDDED_LIBRARY
int begin_dataset();
virtual void remove_last_row() {}
#else
void remove_last_row() {}
#endif
enum enum_protocol_type
{
/*
Before adding a new type, please make sure
there is enough storage for it in Query_cache_query_flags.
*/
PROTOCOL_TEXT= 0, PROTOCOL_BINARY= 1, PROTOCOL_LOCAL= 2
};
virtual enum enum_protocol_type type()= 0;
void end_statement();
friend int send_answer_1(Protocol *protocol, String *s1, String *s2,
String *s3);
friend int send_header_2(Protocol *protocol, bool for_category);
};
/** Class used for the old (MySQL 4.0 protocol). */
class Protocol_text :public Protocol
{
public:
Protocol_text(THD *thd_arg) :Protocol(thd_arg) {}
virtual void prepare_for_resend();
virtual bool store_null();
virtual bool store_tiny(longlong from);
virtual bool store_short(longlong from);
virtual bool store_long(longlong from);
virtual bool store_longlong(longlong from, bool unsigned_flag);
virtual bool store_decimal(const my_decimal *);
virtual bool store(const char *from, size_t length, CHARSET_INFO *cs);
virtual bool store(const char *from, size_t length,
CHARSET_INFO *fromcs, CHARSET_INFO *tocs);
virtual bool store(MYSQL_TIME *time, int decimals);
virtual bool store_date(MYSQL_TIME *time);
virtual bool store_time(MYSQL_TIME *time, int decimals);
virtual bool store(float nr, uint32 decimals, String *buffer);
virtual bool store(double from, uint32 decimals, String *buffer);
virtual bool store(Field *field);
virtual bool send_out_parameters(List<Item_param> *sp_params);
#ifdef EMBEDDED_LIBRARY
void remove_last_row();
#endif
virtual enum enum_protocol_type type() { return PROTOCOL_TEXT; };
};
class Protocol_binary :public Protocol
{
private:
uint bit_fields;
public:
Protocol_binary(THD *thd_arg) :Protocol(thd_arg) {}
virtual bool prepare_for_send(uint num_columns);
virtual void prepare_for_resend();
#ifdef EMBEDDED_LIBRARY
virtual bool write();
bool net_store_data(const uchar *from, size_t length);
bool net_store_data_cs(const uchar *from, size_t length,
CHARSET_INFO *fromcs, CHARSET_INFO *tocs);
#endif
virtual bool store_null();
virtual bool store_tiny(longlong from);
virtual bool store_short(longlong from);
virtual bool store_long(longlong from);
virtual bool store_longlong(longlong from, bool unsigned_flag);
virtual bool store_decimal(const my_decimal *);
virtual bool store(const char *from, size_t length, CHARSET_INFO *cs);
virtual bool store(const char *from, size_t length,
CHARSET_INFO *fromcs, CHARSET_INFO *tocs);
virtual bool store(MYSQL_TIME *time, int decimals);
virtual bool store_date(MYSQL_TIME *time);
virtual bool store_time(MYSQL_TIME *time, int decimals);
virtual bool store(float nr, uint32 decimals, String *buffer);
virtual bool store(double from, uint32 decimals, String *buffer);
virtual bool store(Field *field);
virtual bool send_out_parameters(List<Item_param> *sp_params);
virtual enum enum_protocol_type type() { return PROTOCOL_BINARY; };
};
/*
A helper for "ANALYZE $stmt" which looks a real network procotol but doesn't
write results to the network.
At first glance, class select_send looks like a more appropriate place to
implement the "write nothing" hook. This is not true, because
- we need to evaluate the value of every item, and do it the way
select_send does it (i.e. call item->val_int() or val_real() or...)
- select_send::send_data() has some other code, like telling the storage
engine that the row can be unlocked. We want to keep that also.
as a result, "ANALYZE $stmt" uses a select_send_analyze which still uses
select_send::send_data() & co., and also uses Protocol_discard object.
*/
class Protocol_discard : public Protocol_text
{
public:
Protocol_discard(THD *thd_arg) : Protocol_text(thd_arg) {}
bool write() { return 0; }
bool send_result_set_metadata(List<Item> *, uint) { return 0; }
bool send_eof(uint, uint) { return 0; }
void prepare_for_resend() { IF_DBUG(field_pos= 0,); }
/*
Provide dummy overrides for any storage methods so that we
avoid allocating and copying of data
*/
bool store_null() { return false; }
bool store_tiny(longlong) { return false; }
bool store_short(longlong) { return false; }
bool store_long(longlong) { return false; }
bool store_longlong(longlong, bool) { return false; }
bool store_decimal(const my_decimal *) { return false; }
bool store(const char *, size_t, CHARSET_INFO *) { return false; }
bool store(const char *, size_t, CHARSET_INFO *, CHARSET_INFO *) { return false; }
bool store(MYSQL_TIME *, int) { return false; }
bool store_date(MYSQL_TIME *) { return false; }
bool store_time(MYSQL_TIME *, int) { return false; }
bool store(float, uint32, String *) { return false; }
bool store(double, uint32, String *) { return false; }
bool store(Field *) { return false; }
};
void send_warning(THD *thd, uint sql_errno, const char *err=0);
bool net_send_error(THD *thd, uint sql_errno, const char *err,
const char* sqlstate);
void net_send_progress_packet(THD *thd);
uchar *net_store_data(uchar *to,const uchar *from, size_t length);
uchar *net_store_data(uchar *to,int32 from);
uchar *net_store_data(uchar *to,longlong from);
#endif /* PROTOCOL_INCLUDED */
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