/* Copyright (c) 2008, 2016, 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, version 2.0,
  as published by the Free Software Foundation.

  This program is also distributed with certain software (including
  but not limited to OpenSSL) that is licensed under separate terms,
  as designated in a particular file or component or in included license
  documentation.  The authors of MySQL hereby grant you an additional
  permission to link the program and your derivative works with the
  separately licensed software that they have included with MySQL.

  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, version 2.0, 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 Street, Fifth Floor, Boston, MA 02110-1335  USA */

#ifndef PFS_TABLE_HELPER_H
#define PFS_TABLE_HELPER_H

#include "pfs_column_types.h"
#include "pfs_stat.h"
#include "pfs_timer.h"
#include "pfs_engine_table.h"
#include "pfs_instr_class.h"
#include "pfs_digest.h"

/*
  Write MD5 hash value in a string to be used
  as DIGEST for the statement.
*/
#define MD5_HASH_TO_STRING(_hash, _str)                    \
  sprintf(_str, "%02x%02x%02x%02x%02x%02x%02x%02x"         \
                "%02x%02x%02x%02x%02x%02x%02x%02x",        \
          _hash[0], _hash[1], _hash[2], _hash[3],          \
          _hash[4], _hash[5], _hash[6], _hash[7],          \
          _hash[8], _hash[9], _hash[10], _hash[11],        \
          _hash[12], _hash[13], _hash[14], _hash[15])

#define MD5_HASH_TO_STRING_LENGTH 32

struct PFS_host;
struct PFS_user;
struct PFS_account;
struct PFS_object_name;
struct PFS_program;
class System_variable;
class Status_variable;

/**
  @file storage/perfschema/table_helper.h
  Performance schema table helpers (declarations).
*/

/**
  @addtogroup Performance_schema_tables
  @{
*/

/** Namespace, internal views used within table setup_instruments. */
struct PFS_instrument_view_constants
{
  static const uint FIRST_VIEW= 1;
  static const uint VIEW_MUTEX= 1;
  static const uint VIEW_RWLOCK= 2;
  static const uint VIEW_COND= 3;
  static const uint VIEW_FILE= 4;
  static const uint VIEW_TABLE= 5;
  static const uint VIEW_SOCKET= 6;
  static const uint VIEW_IDLE= 7;
  static const uint VIEW_METADATA= 8;
  static const uint LAST_VIEW= 8;
};

/** Namespace, internal views used within object summaries. */
struct PFS_object_view_constants
{
  static const uint FIRST_VIEW= 1;
  static const uint VIEW_TABLE= 1;
  static const uint VIEW_PROGRAM= 2;
  static const uint LAST_VIEW= 2;
};

/** Row fragment for column HOST. */
struct PFS_host_row
{
  /** Column HOST. */
  char m_hostname[HOSTNAME_LENGTH];
  /** Length in bytes of @c m_hostname. */
  uint m_hostname_length;

  /** Build a row from a memory buffer. */
  int make_row(PFS_host *pfs);
  /** Set a table field from the row. */
  void set_field(Field *f);
};

/** Row fragment for column USER. */
struct PFS_user_row
{
  /** Column USER. */
  char m_username[USERNAME_LENGTH];
  /** Length in bytes of @c m_username. */
  uint m_username_length;

  /** Build a row from a memory buffer. */
  int make_row(PFS_user *pfs);
  /** Set a table field from the row. */
  void set_field(Field *f);
};

/** Row fragment for columns USER, HOST. */
struct PFS_account_row
{
  /** Column USER. */
  char m_username[USERNAME_LENGTH];
  /** Length in bytes of @c m_username. */
  uint m_username_length;
  /** Column HOST. */
  char m_hostname[HOSTNAME_LENGTH];
  /** Length in bytes of @c m_hostname. */
  uint m_hostname_length;

  /** Build a row from a memory buffer. */
  int make_row(PFS_account *pfs);
  /** Set a table field from the row. */
  void set_field(uint index, Field *f);
};

/** Row fragment for columns DIGEST, DIGEST_TEXT. */
struct PFS_digest_row
{
  /** Column SCHEMA_NAME. */
  char m_schema_name[NAME_LEN];
  /** Length in bytes of @c m_schema_name. */
  uint m_schema_name_length;
  /** Column DIGEST. */
  char m_digest[COL_DIGEST_SIZE];
  /** Length in bytes of @c m_digest. */
  uint m_digest_length;
  /** Column DIGEST_TEXT. */
  String m_digest_text;

  /** Build a row from a memory buffer. */
  int make_row(PFS_statements_digest_stat*);
  /** Set a table field from the row. */
  void set_field(uint index, Field *f);
};

/** Row fragment for column EVENT_NAME. */
struct PFS_event_name_row
{
  /** Column EVENT_NAME. */
  const char *m_name;
  /** Length in bytes of @c m_name. */
  uint m_name_length;

  /** Build a row from a memory buffer. */
  inline void make_row(PFS_instr_class *pfs)
  {
    m_name= pfs->m_name;
    m_name_length= pfs->m_name_length;
  }

  /** Set a table field from the row. */
  inline void set_field(Field *f)
  {
    PFS_engine_table::set_field_varchar_utf8(f, m_name, m_name_length);
  }
};

/** Row fragment for columns OBJECT_TYPE, SCHEMA_NAME, OBJECT_NAME. */
struct PFS_object_row
{
  /** Column OBJECT_TYPE. */
  enum_object_type m_object_type;
  /** Column SCHEMA_NAME. */
  char m_schema_name[NAME_LEN];
  /** Length in bytes of @c m_schema_name. */
  uint m_schema_name_length;
  /** Column OBJECT_NAME. */
  char m_object_name[NAME_LEN];
  /** Length in bytes of @c m_object_name. */
  uint m_object_name_length;

  /** Build a row from a memory buffer. */
  int make_row(PFS_table_share *pfs);
  int make_row(PFS_program *pfs);
  int make_row(const MDL_key *pfs);
  /** Set a table field from the row. */
  void set_field(uint index, Field *f);
  void set_nullable_field(uint index, Field *f);
};

/** Row fragment for columns OBJECT_TYPE, SCHEMA_NAME, OBJECT_NAME, INDEX_NAME. */
struct PFS_index_row
{
  PFS_object_row m_object_row;
  /** Column INDEX_NAME. */
  char m_index_name[NAME_LEN];
  /** Length in bytes of @c m_index_name. */
  uint m_index_name_length;

  /** Build a row from a memory buffer. */
  int make_row(PFS_table_share *pfs, PFS_table_share_index *pfs_index,
               uint table_index);
  /** Set a table field from the row. */
  void set_field(uint index, Field *f);
};

/** Row fragment for single statistics columns (COUNT, SUM, MIN, AVG, MAX) */
struct PFS_stat_row
{
  /** Column COUNT_STAR. */
  ulonglong m_count;
  /** Column SUM_TIMER_WAIT. */
  ulonglong m_sum;
  /** Column MIN_TIMER_WAIT. */
  ulonglong m_min;
  /** Column AVG_TIMER_WAIT. */
  ulonglong m_avg;
  /** Column MAX_TIMER_WAIT. */
  ulonglong m_max;

  inline void reset()
  {
    m_count= 0;
    m_sum= 0;
    m_min= 0;
    m_avg= 0;
    m_max= 0;
  }

  /** Build a row with timer fields from a memory buffer. */
  inline void set(time_normalizer *normalizer, const PFS_single_stat *stat)
  {
    m_count= stat->m_count;

    if ((m_count != 0) && stat->has_timed_stats())
    {
      m_sum= normalizer->wait_to_pico(stat->m_sum);
      m_min= normalizer->wait_to_pico(stat->m_min);
      m_max= normalizer->wait_to_pico(stat->m_max);
      m_avg= normalizer->wait_to_pico(stat->m_sum / m_count);
    }
    else
    {
      m_sum= 0;
      m_min= 0;
      m_avg= 0;
      m_max= 0;
    }
  }

  /** Set a table field from the row. */
  void set_field(uint index, Field *f)
  {
    switch (index)
    {
      case 0: /* COUNT */
        PFS_engine_table::set_field_ulonglong(f, m_count);
        break;
      case 1: /* SUM */
        PFS_engine_table::set_field_ulonglong(f, m_sum);
        break;
      case 2: /* MIN */
        PFS_engine_table::set_field_ulonglong(f, m_min);
        break;
      case 3: /* AVG */
        PFS_engine_table::set_field_ulonglong(f, m_avg);
        break;
      case 4: /* MAX */
        PFS_engine_table::set_field_ulonglong(f, m_max);
        break;
      default:
        DBUG_ASSERT(false);
    }
  }
};

/** Row fragment for timer and byte count stats. Corresponds to PFS_byte_stat */
struct PFS_byte_stat_row
{
  PFS_stat_row m_waits;
  ulonglong    m_bytes;

  /** Build a row with timer and byte count fields from a memory buffer. */
  inline void set(time_normalizer *normalizer, const PFS_byte_stat *stat)
  {
    m_waits.set(normalizer, stat);
    m_bytes= stat->m_bytes;
  }
};

/** Row fragment for table io statistics columns. */
struct PFS_table_io_stat_row
{
  PFS_stat_row m_all;
  PFS_stat_row m_all_read;
  PFS_stat_row m_all_write;
  PFS_stat_row m_fetch;
  PFS_stat_row m_insert;
  PFS_stat_row m_update;
  PFS_stat_row m_delete;

  /** Build a row from a memory buffer. */
  inline void set(time_normalizer *normalizer, const PFS_table_io_stat *stat)
  {
    PFS_single_stat all_read;
    PFS_single_stat all_write;
    PFS_single_stat all;

    m_fetch.set(normalizer, & stat->m_fetch);

    all_read.aggregate(& stat->m_fetch);

    m_insert.set(normalizer, & stat->m_insert);
    m_update.set(normalizer, & stat->m_update);
    m_delete.set(normalizer, & stat->m_delete);

    all_write.aggregate(& stat->m_insert);
    all_write.aggregate(& stat->m_update);
    all_write.aggregate(& stat->m_delete);

    all.aggregate(& all_read);
    all.aggregate(& all_write);

    m_all_read.set(normalizer, & all_read);
    m_all_write.set(normalizer, & all_write);
    m_all.set(normalizer, & all);
  }
};

/** Row fragment for table lock statistics columns. */
struct PFS_table_lock_stat_row
{
  PFS_stat_row m_all;
  PFS_stat_row m_all_read;
  PFS_stat_row m_all_write;
  PFS_stat_row m_read_normal;
  PFS_stat_row m_read_with_shared_locks;
  PFS_stat_row m_read_high_priority;
  PFS_stat_row m_read_no_insert;
  PFS_stat_row m_read_external;
  PFS_stat_row m_write_allow_write;
  PFS_stat_row m_write_concurrent_insert;
  PFS_stat_row m_write_delayed;
  PFS_stat_row m_write_low_priority;
  PFS_stat_row m_write_normal;
  PFS_stat_row m_write_external;

  /** Build a row from a memory buffer. */
  inline void set(time_normalizer *normalizer, const PFS_table_lock_stat *stat)
  {
    PFS_single_stat all_read;
    PFS_single_stat all_write;
    PFS_single_stat all;

    m_read_normal.set(normalizer, & stat->m_stat[PFS_TL_READ]);
    m_read_with_shared_locks.set(normalizer, & stat->m_stat[PFS_TL_READ_WITH_SHARED_LOCKS]);
    m_read_high_priority.set(normalizer, & stat->m_stat[PFS_TL_READ_HIGH_PRIORITY]);
    m_read_no_insert.set(normalizer, & stat->m_stat[PFS_TL_READ_NO_INSERT]);
    m_read_external.set(normalizer, & stat->m_stat[PFS_TL_READ_EXTERNAL]);

    all_read.aggregate(& stat->m_stat[PFS_TL_READ]);
    all_read.aggregate(& stat->m_stat[PFS_TL_READ_WITH_SHARED_LOCKS]);
    all_read.aggregate(& stat->m_stat[PFS_TL_READ_HIGH_PRIORITY]);
    all_read.aggregate(& stat->m_stat[PFS_TL_READ_NO_INSERT]);
    all_read.aggregate(& stat->m_stat[PFS_TL_READ_EXTERNAL]);

    m_write_allow_write.set(normalizer, & stat->m_stat[PFS_TL_WRITE_ALLOW_WRITE]);
    m_write_concurrent_insert.set(normalizer, & stat->m_stat[PFS_TL_WRITE_CONCURRENT_INSERT]);
    m_write_delayed.set(normalizer, & stat->m_stat[PFS_TL_WRITE_DELAYED]);
    m_write_low_priority.set(normalizer, & stat->m_stat[PFS_TL_WRITE_LOW_PRIORITY]);
    m_write_normal.set(normalizer, & stat->m_stat[PFS_TL_WRITE]);
    m_write_external.set(normalizer, & stat->m_stat[PFS_TL_WRITE_EXTERNAL]);

    all_write.aggregate(& stat->m_stat[PFS_TL_WRITE_ALLOW_WRITE]);
    all_write.aggregate(& stat->m_stat[PFS_TL_WRITE_CONCURRENT_INSERT]);
    all_write.aggregate(& stat->m_stat[PFS_TL_WRITE_DELAYED]);
    all_write.aggregate(& stat->m_stat[PFS_TL_WRITE_LOW_PRIORITY]);
    all_write.aggregate(& stat->m_stat[PFS_TL_WRITE]);
    all_write.aggregate(& stat->m_stat[PFS_TL_WRITE_EXTERNAL]);

    all.aggregate(& all_read);
    all.aggregate(& all_write);

    m_all_read.set(normalizer, & all_read);
    m_all_write.set(normalizer, & all_write);
    m_all.set(normalizer, & all);
  }
};

/** Row fragment for stage statistics columns. */
struct PFS_stage_stat_row
{
  PFS_stat_row m_timer1_row;

  /** Build a row from a memory buffer. */
  inline void set(time_normalizer *normalizer, const PFS_stage_stat *stat)
  {
    m_timer1_row.set(normalizer, & stat->m_timer1_stat);
  }

  /** Set a table field from the row. */
  void set_field(uint index, Field *f)
  {
     m_timer1_row.set_field(index, f);
  }
};

/** Row fragment for statement statistics columns. */
struct PFS_statement_stat_row
{
  PFS_stat_row m_timer1_row;
  ulonglong m_error_count;
  ulonglong m_warning_count;
  ulonglong m_rows_affected;
  ulonglong m_lock_time;
  ulonglong m_rows_sent;
  ulonglong m_rows_examined;
  ulonglong m_created_tmp_disk_tables;
  ulonglong m_created_tmp_tables;
  ulonglong m_select_full_join;
  ulonglong m_select_full_range_join;
  ulonglong m_select_range;
  ulonglong m_select_range_check;
  ulonglong m_select_scan;
  ulonglong m_sort_merge_passes;
  ulonglong m_sort_range;
  ulonglong m_sort_rows;
  ulonglong m_sort_scan;
  ulonglong m_no_index_used;
  ulonglong m_no_good_index_used;

  /** Build a row from a memory buffer. */
  inline void set(time_normalizer *normalizer, const PFS_statement_stat *stat)
  {
    if (stat->m_timer1_stat.m_count != 0)
    {
      m_timer1_row.set(normalizer, & stat->m_timer1_stat);

      m_error_count= stat->m_error_count;
      m_warning_count= stat->m_warning_count;
      m_lock_time= stat->m_lock_time * MICROSEC_TO_PICOSEC;
      m_rows_affected= stat->m_rows_affected;
      m_rows_sent= stat->m_rows_sent;
      m_rows_examined= stat->m_rows_examined;
      m_created_tmp_disk_tables= stat->m_created_tmp_disk_tables;
      m_created_tmp_tables= stat->m_created_tmp_tables;
      m_select_full_join= stat->m_select_full_join;
      m_select_full_range_join= stat->m_select_full_range_join;
      m_select_range= stat->m_select_range;
      m_select_range_check= stat->m_select_range_check;
      m_select_scan= stat->m_select_scan;
      m_sort_merge_passes= stat->m_sort_merge_passes;
      m_sort_range= stat->m_sort_range;
      m_sort_rows= stat->m_sort_rows;
      m_sort_scan= stat->m_sort_scan;
      m_no_index_used= stat->m_no_index_used;
      m_no_good_index_used= stat->m_no_good_index_used;
    }
    else
    {
      m_timer1_row.reset();

      m_error_count= 0;
      m_warning_count= 0;
      m_lock_time= 0;
      m_rows_affected= 0;
      m_rows_sent= 0;
      m_rows_examined= 0;
      m_created_tmp_disk_tables= 0;
      m_created_tmp_tables= 0;
      m_select_full_join= 0;
      m_select_full_range_join= 0;
      m_select_range= 0;
      m_select_range_check= 0;
      m_select_scan= 0;
      m_sort_merge_passes= 0;
      m_sort_range= 0;
      m_sort_rows= 0;
      m_sort_scan= 0;
      m_no_index_used= 0;
      m_no_good_index_used= 0;
    }
  }

  /** Set a table field from the row. */
  void set_field(uint index, Field *f);
};

/** Row fragment for stored program statistics. */
struct PFS_sp_stat_row
{
  PFS_stat_row m_timer1_row;

  /** Build a row from a memory buffer. */
  inline void set(time_normalizer *normalizer, const PFS_sp_stat *stat)
  {
    m_timer1_row.set(normalizer, & stat->m_timer1_stat);
  }

  /** Set a table field from the row. */
  inline void set_field(uint index, Field *f)
  {
    m_timer1_row.set_field(index, f);
  }
};

/** Row fragment for transaction statistics columns. */
struct PFS_transaction_stat_row
{
  PFS_stat_row m_timer1_row;
  PFS_stat_row m_read_write_row;
  PFS_stat_row m_read_only_row;
  ulonglong m_savepoint_count;
  ulonglong m_rollback_to_savepoint_count;
  ulonglong m_release_savepoint_count;

  /** Build a row from a memory buffer. */
  inline void set(time_normalizer *normalizer, const PFS_transaction_stat *stat)
  {
    /* Combine read write/read only stats */
    PFS_single_stat all;
    all.aggregate(&stat->m_read_only_stat);
    all.aggregate(&stat->m_read_write_stat);

    m_timer1_row.set(normalizer, &all);
    m_read_write_row.set(normalizer, &stat->m_read_write_stat);
    m_read_only_row.set(normalizer, &stat->m_read_only_stat);
  }

  /** Set a table field from the row. */
  void set_field(uint index, Field *f);
};

/** Row fragment for connection statistics. */
struct PFS_connection_stat_row
{
  ulonglong m_current_connections;
  ulonglong m_total_connections;

  inline void set(const PFS_connection_stat *stat)
  {
    m_current_connections= stat->m_current_connections;
    m_total_connections= stat->m_total_connections;
  }

  /** Set a table field from the row. */
  void set_field(uint index, Field *f);
};

void set_field_object_type(Field *f, enum_object_type object_type);
void set_field_lock_type(Field *f, PFS_TL_LOCK_TYPE lock_type);
void set_field_mdl_type(Field *f, opaque_mdl_type mdl_type, bool backup);
void set_field_mdl_duration(Field *f, opaque_mdl_duration mdl_duration);
void set_field_mdl_status(Field *f, opaque_mdl_status mdl_status);
void set_field_isolation_level(Field *f, enum_isolation_level iso_level);
void set_field_xa_state(Field *f, enum_xa_transaction_state xa_state);

/** Row fragment for socket io statistics columns. */
struct PFS_socket_io_stat_row
{
  PFS_byte_stat_row m_read;
  PFS_byte_stat_row m_write;
  PFS_byte_stat_row m_misc;
  PFS_byte_stat_row m_all;

  inline void set(time_normalizer *normalizer, const PFS_socket_io_stat *stat)
  {
    PFS_byte_stat all;

    m_read.set(normalizer, &stat->m_read);
    m_write.set(normalizer, &stat->m_write);
    m_misc.set(normalizer, &stat->m_misc);

    /* Combine stats for all operations */
    all.aggregate(&stat->m_read);
    all.aggregate(&stat->m_write);
    all.aggregate(&stat->m_misc);

    m_all.set(normalizer, &all);
  }
};

/** Row fragment for file io statistics columns. */
struct PFS_file_io_stat_row
{
  PFS_byte_stat_row m_read;
  PFS_byte_stat_row m_write;
  PFS_byte_stat_row m_misc;
  PFS_byte_stat_row m_all;

  inline void set(time_normalizer *normalizer, const PFS_file_io_stat *stat)
  {
    PFS_byte_stat all;

    m_read.set(normalizer, &stat->m_read);
    m_write.set(normalizer, &stat->m_write);
    m_misc.set(normalizer, &stat->m_misc);

    /* Combine stats for all operations */
    all.aggregate(&stat->m_read);
    all.aggregate(&stat->m_write);
    all.aggregate(&stat->m_misc);

    m_all.set(normalizer, &all);
  }
};

/** Row fragment for memory statistics columns. */
struct PFS_memory_stat_row
{
  PFS_memory_stat m_stat;

  /** Build a row from a memory buffer. */
  inline void set(const PFS_memory_stat *stat)
  {
    m_stat= *stat;
  }

  /** Set a table field from the row. */
  void set_field(uint index, Field *f);
};

struct PFS_variable_name_row
{
public:
  PFS_variable_name_row()
  {
    m_str[0]= '\0';
    m_length= 0;
  }

  void make_row(const char* str, size_t length);

  char m_str[NAME_CHAR_LEN+1];
  uint m_length;
};

struct PFS_variable_value_row
{
public:
  /** Set the row from a status variable. */
  void make_row(const Status_variable *var);

  /** Set the row from a system variable. */
  void make_row(const System_variable *var);

  /** Set a table field from the row. */
  void set_field(Field *f);

private:
  void make_row(const CHARSET_INFO *cs, const char* str, size_t length);

  char m_str[1024];
  uint m_length;
  const CHARSET_INFO *m_charset;
};

struct PFS_user_variable_value_row
{
public:
  PFS_user_variable_value_row()
    : m_value(NULL), m_value_length(0)
  {}

  PFS_user_variable_value_row(const PFS_user_variable_value_row& rhs)
  {
    make_row(rhs.m_value, rhs.m_value_length);
  }

  ~PFS_user_variable_value_row()
  {
    clear();
  }

  void make_row(const char* val, size_t length);

  const char *get_value() const
  { return m_value; }

  size_t get_value_length() const
  { return m_value_length; }

  void clear();

private:
  char *m_value;
  size_t m_value_length;
};

/** @} */

#endif