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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, Inc.
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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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#include <drizzled/function/math/multiply.h>
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double Item_func_mul::real_op()
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double value= args[0]->val_real() * args[1]->val_real();
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if ((null_value=args[0]->null_value || args[1]->null_value))
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return fix_result(value);
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int64_t Item_func_mul::int_op()
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int64_t value=args[0]->val_int()*args[1]->val_int();
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if ((null_value=args[0]->null_value || args[1]->null_value))
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/** See Item_func_plus::decimal_op for comments. */
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type::Decimal *Item_func_mul::decimal_op(type::Decimal *decimal_value)
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type::Decimal value1, *val1;
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type::Decimal value2, *val2;
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val1= args[0]->val_decimal(&value1);
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if ((null_value= args[0]->null_value))
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val2= args[1]->val_decimal(&value2);
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if (!(null_value= (args[1]->null_value ||
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(class_decimal_mul(E_DEC_FATAL_ERROR, decimal_value, val1,
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void Item_func_mul::result_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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unsigned_flag= args[0]->unsigned_flag & args[1]->unsigned_flag;
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decimals= min(args[0]->decimals + args[1]->decimals, DECIMAL_MAX_SCALE);
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int precision= min(args[0]->decimal_precision() + args[1]->decimal_precision(),
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(unsigned int)DECIMAL_MAX_PRECISION);
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max_length= class_decimal_precision_to_length(precision, decimals,unsigned_flag);
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} /* namespace drizzled */