/* Copyright (c) 2010, 2025, Oracle and/or its affiliates.

  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 designed to work with certain software (including
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  as designated in a particular file or component or in included license
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  permission to link the program and your derivative works with the
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  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 St, Fifth Floor, Boston, MA 02110-1301  USA
  */

/**
  @file storage/perfschema/table_esms_by_account_by_event_name.cc
  Table EVENTS_STATEMENTS_SUMMARY_BY_ACCOUNT_BY_EVENT_NAME (implementation).
*/

#include "storage/perfschema/table_esms_by_account_by_event_name.h"

#include <assert.h>
#include <stddef.h>

#include "my_thread.h"
#include "sql/field.h"
#include "sql/plugin_table.h"
#include "sql/table.h"
#include "storage/perfschema/pfs_buffer_container.h"
#include "storage/perfschema/pfs_column_types.h"
#include "storage/perfschema/pfs_column_values.h"
#include "storage/perfschema/pfs_global.h"
#include "storage/perfschema/pfs_instr_class.h"
#include "storage/perfschema/pfs_visitor.h"

THR_LOCK table_esms_by_account_by_event_name::m_table_lock;

Plugin_table table_esms_by_account_by_event_name::m_table_def(
    /* Schema name */
    "performance_schema",
    /* Name */
    "events_statements_summary_by_account_by_event_name",
    /* Definition */
    "  USER CHAR(32) collate utf8mb4_bin default null,\n"
    "  HOST CHAR(255) CHARACTER SET ASCII default null,\n"
    "  EVENT_NAME VARCHAR(128) not null,\n"
    "  COUNT_STAR BIGINT unsigned not null,\n"
    "  SUM_TIMER_WAIT BIGINT unsigned not null,\n"
    "  MIN_TIMER_WAIT BIGINT unsigned not null,\n"
    "  AVG_TIMER_WAIT BIGINT unsigned not null,\n"
    "  MAX_TIMER_WAIT BIGINT unsigned not null,\n"
    "  SUM_LOCK_TIME BIGINT unsigned not null,\n"
    "  SUM_ERRORS BIGINT unsigned not null,\n"
    "  SUM_WARNINGS BIGINT unsigned not null,\n"
    "  SUM_ROWS_AFFECTED BIGINT unsigned not null,\n"
    "  SUM_ROWS_SENT BIGINT unsigned not null,\n"
    "  SUM_ROWS_EXAMINED BIGINT unsigned not null,\n"
    "  SUM_CREATED_TMP_DISK_TABLES BIGINT unsigned not null,\n"
    "  SUM_CREATED_TMP_TABLES BIGINT unsigned not null,\n"
    "  SUM_SELECT_FULL_JOIN BIGINT unsigned not null,\n"
    "  SUM_SELECT_FULL_RANGE_JOIN BIGINT unsigned not null,\n"
    "  SUM_SELECT_RANGE BIGINT unsigned not null,\n"
    "  SUM_SELECT_RANGE_CHECK BIGINT unsigned not null,\n"
    "  SUM_SELECT_SCAN BIGINT unsigned not null,\n"
    "  SUM_SORT_MERGE_PASSES BIGINT unsigned not null,\n"
    "  SUM_SORT_RANGE BIGINT unsigned not null,\n"
    "  SUM_SORT_ROWS BIGINT unsigned not null,\n"
    "  SUM_SORT_SCAN BIGINT unsigned not null,\n"
    "  SUM_NO_INDEX_USED BIGINT unsigned not null,\n"
    "  SUM_NO_GOOD_INDEX_USED BIGINT unsigned not null,\n"
    "  SUM_CPU_TIME BIGINT unsigned not null,\n"
    "  MAX_CONTROLLED_MEMORY BIGINT unsigned not null,\n"
    "  MAX_TOTAL_MEMORY BIGINT unsigned not null,\n"
    "  COUNT_SECONDARY BIGINT unsigned not null,\n"
    "  UNIQUE KEY `ACCOUNT` (USER, HOST, EVENT_NAME) USING HASH\n",
    /* Options */
    " ENGINE=PERFORMANCE_SCHEMA",
    /* Tablespace */
    nullptr);

PFS_engine_table_share table_esms_by_account_by_event_name::m_share = {
    &pfs_truncatable_acl,
    table_esms_by_account_by_event_name::create,
    nullptr, /* write_row */
    table_esms_by_account_by_event_name::delete_all_rows,
    table_esms_by_account_by_event_name::get_row_count,
    sizeof(pos_esms_by_account_by_event_name),
    &m_table_lock,
    &m_table_def,
    false, /* perpetual */
    PFS_engine_table_proxy(),
    {0},
    false /* m_in_purgatory */
};

bool PFS_index_esms_by_account_by_event_name::match(PFS_account *pfs) {
  if (m_fields >= 1) {
    if (!m_key_1.match(pfs)) {
      return false;
    }
  }

  if (m_fields >= 2) {
    if (!m_key_2.match(pfs)) {
      return false;
    }
  }
  return true;
}

bool PFS_index_esms_by_account_by_event_name::match(
    PFS_instr_class *instr_class) {
  if (instr_class->is_mutable()) {
    return false;
  }

  if (m_fields >= 3) {
    if (!m_key_3.match(instr_class)) {
      return false;
    }
  }
  return true;
}

PFS_engine_table *table_esms_by_account_by_event_name::create(
    PFS_engine_table_share *) {
  return new table_esms_by_account_by_event_name();
}

int table_esms_by_account_by_event_name::delete_all_rows() {
  reset_events_statements_by_thread();
  reset_events_statements_by_account();
  return 0;
}

ha_rows table_esms_by_account_by_event_name::get_row_count() {
  return global_account_container.get_row_count() * statement_class_max;
}

table_esms_by_account_by_event_name::table_esms_by_account_by_event_name()
    : PFS_engine_table(&m_share, &m_pos), m_pos(), m_next_pos() {
  m_normalizer = time_normalizer::get_statement();
}

void table_esms_by_account_by_event_name::reset_position() {
  m_pos.reset();
  m_next_pos.reset();
}

int table_esms_by_account_by_event_name::rnd_init(bool) { return 0; }

int table_esms_by_account_by_event_name::rnd_next() {
  PFS_account *account;
  PFS_statement_class *statement_class;
  bool has_more_account = true;

  for (m_pos.set_at(&m_next_pos); has_more_account; m_pos.next_account()) {
    account = global_account_container.get(m_pos.m_index_1, &has_more_account);
    if (account != nullptr) {
      statement_class = find_statement_class(m_pos.m_index_2);
      if (statement_class) {
        m_next_pos.set_after(&m_pos);
        return make_row(account, statement_class);
      }
    }
  }

  return HA_ERR_END_OF_FILE;
}

int table_esms_by_account_by_event_name::rnd_pos(const void *pos) {
  PFS_account *account;
  PFS_statement_class *statement_class;

  set_position(pos);

  account = global_account_container.get(m_pos.m_index_1);
  if (account != nullptr) {
    statement_class = find_statement_class(m_pos.m_index_2);
    if (statement_class) {
      return make_row(account, statement_class);
    }
  }

  return HA_ERR_RECORD_DELETED;
}

int table_esms_by_account_by_event_name::index_init(uint idx [[maybe_unused]],
                                                    bool) {
  PFS_index_esms_by_account_by_event_name *result = nullptr;
  assert(idx == 0);
  result = PFS_NEW(PFS_index_esms_by_account_by_event_name);
  m_opened_index = result;
  m_index = result;
  return 0;
}

int table_esms_by_account_by_event_name::index_next() {
  PFS_account *account;
  PFS_statement_class *statement_class;
  bool has_more_account = true;

  for (m_pos.set_at(&m_next_pos); has_more_account; m_pos.next_account()) {
    account = global_account_container.get(m_pos.m_index_1, &has_more_account);
    if (account != nullptr) {
      if (m_opened_index->match(account)) {
        do {
          statement_class = find_statement_class(m_pos.m_index_2);
          if (statement_class) {
            if (m_opened_index->match(statement_class)) {
              if (!make_row(account, statement_class)) {
                m_next_pos.set_after(&m_pos);
                return 0;
              }
            }
            m_pos.m_index_2++;
          }
        } while (statement_class != nullptr);
      }
    }
  }

  return HA_ERR_END_OF_FILE;
}

int table_esms_by_account_by_event_name::make_row(PFS_account *account,
                                                  PFS_statement_class *klass) {
  pfs_optimistic_state lock;

  if (klass->is_mutable()) {
    return HA_ERR_RECORD_DELETED;
  }

  account->m_lock.begin_optimistic_lock(&lock);

  if (m_row.m_account.make_row(account)) {
    return HA_ERR_RECORD_DELETED;
  }

  m_row.m_event_name.make_row(klass);

  PFS_connection_statement_visitor visitor(klass);
  PFS_connection_iterator::visit_account(account, true, /* threads */
                                         false,         /* THDs */
                                         &visitor);

  if (!account->m_lock.end_optimistic_lock(&lock)) {
    return HA_ERR_RECORD_DELETED;
  }

  m_row.m_stat.set(m_normalizer, &visitor.m_stat);

  return 0;
}

int table_esms_by_account_by_event_name::read_row_values(TABLE *table,
                                                         unsigned char *buf,
                                                         Field **fields,
                                                         bool read_all) {
  Field *f;

  /* Set the null bits */
  assert(table->s->null_bytes == 1);
  buf[0] = 0;

  for (; (f = *fields); fields++) {
    if (read_all || bitmap_is_set(table->read_set, f->field_index())) {
      switch (f->field_index()) {
        case 0: /* USER */
        case 1: /* HOST */
          m_row.m_account.set_nullable_field(f->field_index(), f);
          break;
        case 2: /* EVENT_NAME */
          m_row.m_event_name.set_field(f);
          break;
        default: /* 3, ... COUNT/SUM/MIN/AVG/MAX */
          m_row.m_stat.set_field(f->field_index() - 3, f);
          break;
      }
    }
  }

  return 0;
}