51 lines
1.7 KiB
C++
51 lines
1.7 KiB
C++
/* Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved.
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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 Foundation,
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51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA */
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#ifndef OPT_EXPLAIN_FORMAT_TRADITIONAL_INCLUDED
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#define OPT_EXPLAIN_FORMAT_TRADITIONAL_INCLUDED
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#include "opt_explain_format.h"
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/**
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Formatter for the traditional EXPLAIN output
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*/
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class Explain_format_traditional : public Explain_format
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{
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class Item_null *nil;
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qep_row column_buffer; ///< buffer for the current output row
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public:
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Explain_format_traditional() : nil(NULL) {}
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virtual bool is_hierarchical() const { return false; }
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virtual bool send_headers(Query_result *result);
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virtual bool begin_context(enum_parsing_context,
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SELECT_LEX_UNIT *subquery,
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const Explain_format_flags *flags)
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{
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return false;
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}
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virtual bool end_context(enum_parsing_context) { return false; }
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virtual bool flush_entry();
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virtual qep_row *entry() { return &column_buffer; }
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private:
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bool push_select_type(List<Item> *items);
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};
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#endif//OPT_EXPLAIN_FORMAT_TRADITIONAL_INCLUDED
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