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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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class Item_func_neg :public Item_func_num1
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const char *func_name() const { return "-"; }
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enum Functype functype() const { return NEG_FUNC; }
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void fix_length_and_dec();
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void fix_num_length_and_dec();
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uint32_t decimal_precision() const { return args[0]->decimal_precision(); }