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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
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* Copyright (C) 2008 Sun Microsystems
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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#ifndef DRIZZLED_DIAGNOSTICS_AREA_H
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#define DRIZZLED_DIAGNOSTICS_AREA_H
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Stores status of the currently executed statement.
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Cleared at the beginning of the statement, and then
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can hold either OK, ERROR, or EOF status.
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Can not be assigned twice per statement.
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class Diagnostics_area
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enum enum_diagnostics_status
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/** The area is cleared at start of a statement. */
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/** Set whenever one calls my_ok(). */
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/** Set whenever one calls my_eof(). */
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/** Set whenever one calls my_error() or my_message(). */
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/** Set in case of a custom response, such as one from COM_STMT_PREPARE. */
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/** True if status information is sent to the client. */
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/** Set to make set_error_status after set_{ok,eof}_status possible. */
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bool can_overwrite_status;
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void set_ok_status(Session *session, ha_rows affected_rows_arg,
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uint64_t last_insert_id_arg,
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void set_eof_status(Session *session);
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void set_error_status(Session *session, uint32_t sql_errno_arg, const char *message_arg);
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void disable_status();
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void reset_diagnostics_area();
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bool is_set() const { return m_status != DA_EMPTY; }
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bool is_error() const { return m_status == DA_ERROR; }
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bool is_eof() const { return m_status == DA_EOF; }
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bool is_ok() const { return m_status == DA_OK; }
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bool is_disabled() const { return m_status == DA_DISABLED; }
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enum_diagnostics_status status() const { return m_status; }
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const char *message() const
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{ assert(m_status == DA_ERROR || m_status == DA_OK); return m_message; }
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uint32_t sql_errno() const
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{ assert(m_status == DA_ERROR); return m_sql_errno; }
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uint32_t server_status() const
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assert(m_status == DA_OK || m_status == DA_EOF);
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return m_server_status;
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ha_rows affected_rows() const
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{ assert(m_status == DA_OK); return m_affected_rows; }
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uint64_t last_insert_id() const
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{ assert(m_status == DA_OK); return m_last_insert_id; }
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uint32_t total_warn_count() const
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assert(m_status == DA_OK || m_status == DA_EOF);
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return m_total_warn_count;
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Diagnostics_area() { reset_diagnostics_area(); }
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/** Message buffer. Can be used by OK or ERROR status. */
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char m_message[DRIZZLE_ERRMSG_SIZE];
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SQL error number. One of ER_ codes from share/errmsg.txt.
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Set by set_error_status.
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uint32_t m_sql_errno;
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Copied from session->server_status when the diagnostics area is assigned.
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We need this member as some places in the code use the following pattern:
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session->server_status|= ...
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session->server_status&= ~...
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Assigned by OK, EOF or ERROR.
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uint32_t m_server_status;
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The number of rows affected by the last statement. This is
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semantically close to session->row_count_func, but has a different
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life cycle. session->row_count_func stores the value returned by
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function ROW_COUNT() and is cleared only by statements that
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update its value, such as INSERT, UPDATE, DELETE and few others.
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This member is cleared at the beginning of the next statement.
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We could possibly merge the two, but life cycle of session->row_count_func
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ha_rows m_affected_rows;
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Similarly to the previous member, this is a replacement of
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session->first_successful_insert_id_in_prev_stmt, which is used
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to implement LAST_INSERT_ID().
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uint64_t m_last_insert_id;
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/** The total number of warnings. */
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uint m_total_warn_count;
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enum_diagnostics_status m_status;
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@todo: the following Session members belong here:
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- warn_list, warn_count,
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#endif /* DRIZZLED_DIAGNOSTICS_AREA_H */