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492.3.6
by Lee
code clean move Item_func_additive_op to functions directory |
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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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#include <drizzled/server_includes.h> |
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#include CSTDINT_H
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#include <drizzled/functions/additive_op.h> |
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/**
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Set precision of results for additive operations (+ and -)
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*/
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void Item_func_additive_op::result_precision() |
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{
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decimals= cmax(args[0]->decimals, args[1]->decimals); |
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int max_int_part= cmax(args[0]->decimal_precision() - args[0]->decimals, |
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args[1]->decimal_precision() - args[1]->decimals); |
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int precision= cmin(max_int_part + 1 + decimals, DECIMAL_MAX_PRECISION); |
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/* Integer operations keep unsigned_flag if one of arguments is unsigned */
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if (result_type() == INT_RESULT) |
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unsigned_flag= args[0]->unsigned_flag | args[1]->unsigned_flag; |
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else
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unsigned_flag= args[0]->unsigned_flag & args[1]->unsigned_flag; |
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max_length= my_decimal_precision_to_length(precision, decimals, |
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unsigned_flag); |
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}
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