49 lines
1.8 KiB
C++
49 lines
1.8 KiB
C++
/* Copyright (c) 2015, 2017, 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, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have included with MySQL.
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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, version 2.0, 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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#include "sql/opt_explain_format.h"
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#include "m_ctype.h"
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#include "my_dbug.h"
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#include "sql/current_thd.h"
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#include "sql/sql_class.h"
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bool qep_row::mem_root_str::is_empty() {
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if (deferred) {
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StringBuffer<128> buff(system_charset_info);
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if (deferred->eval(&buff) || set(buff)) {
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DBUG_ASSERT(!"OOM!");
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return true; // ignore OOM
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}
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deferred = NULL; // prevent double evaluation, if any
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}
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return str == NULL;
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}
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bool qep_row::mem_root_str::set(const char *str_arg, size_t length_arg) {
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deferred = NULL;
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if (!(str = strndup_root(current_thd->mem_root, str_arg, length_arg)))
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return true; /* purecov: inspected */
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length = length_arg;
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return false;
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}
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