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837
by Brian Aker
Reworked some classes out of session.h |
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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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*
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* Copyright (C) 2008 Sun Microsystems
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*
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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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*
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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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*
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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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*/
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#ifndef DRIZZLED_SELECT_SEND_H
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#define DRIZZLED_SELECT_SEND_H
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class select_send :public select_result { |
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/**
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True if we have sent result set metadata to the client.
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In this case the client always expects us to end the result
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set with an eof or error packet
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*/
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bool is_result_set_started; |
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public: |
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select_send() :is_result_set_started(false) {} |
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bool send_eof() |
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{
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/*
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We may be passing the control from mysqld to the client: release the
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InnoDB adaptive hash S-latch to avoid thread deadlocks if it was reserved
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by session
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*/
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ha_release_temporary_latches(session); |
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/* Unlock tables before sending packet to gain some speed */
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if (session->lock) |
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{
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mysql_unlock_tables(session, session->lock); |
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session->lock= 0; |
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}
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session->my_eof(); |
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is_result_set_started= 0; |
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return false; |
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}
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bool send_fields(List<Item> &list, uint32_t flags) |
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{
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bool res; |
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if (!(res= session->protocol->send_fields(&list, flags))) |
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is_result_set_started= 1; |
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return res; |
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}
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void abort() |
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{
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return; |
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}
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/**
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Cleanup an instance of this class for re-use
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at next execution of a prepared statement/
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stored procedure statement.
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*/
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virtual void cleanup() |
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{
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is_result_set_started= false; |
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}
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/* Send data to client. Returns 0 if ok */
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bool send_data(List<Item> &items) |
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{
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if (unit->offset_limit_cnt) |
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{ // using limit offset,count |
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unit->offset_limit_cnt--; |
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return false; |
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}
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/*
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We may be passing the control from mysqld to the client: release the
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InnoDB adaptive hash S-latch to avoid thread deadlocks if it was reserved
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by session
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*/
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ha_release_temporary_latches(session); |
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List_iterator_fast<Item> li(items); |
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Protocol *protocol= session->protocol; |
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char buff[MAX_FIELD_WIDTH]; |
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String buffer(buff, sizeof(buff), &my_charset_bin); |
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protocol->prepare_for_resend(); |
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Item *item; |
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while ((item=li++)) |
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{
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if (item->send(protocol, &buffer)) |
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{
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protocol->free(); // Free used buffer |
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my_message(ER_OUT_OF_RESOURCES, ER(ER_OUT_OF_RESOURCES), MYF(0)); |
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break; |
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}
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}
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session->sent_row_count++; |
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if (session->is_error()) |
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{
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protocol->remove_last_row(); |
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return true; |
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}
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840.1.19
by Monty Taylor
Renamed vio. |
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if (session->drizzleclient_vio_ok()) |
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837
by Brian Aker
Reworked some classes out of session.h |
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return(protocol->write()); |
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return false; |
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}
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};
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#endif /* DRIZZLED_SELECT_SEND_H */ |