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parse negative numbers into one item

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use Item->neg to convert generate negative Item_num's
instead of Item_func_neg(Item_num).

Based on the following commit:

  Author: Monty <monty@mariadb.org>
  Date:   Mon May 30 22:44:00 2016 +0300

    Make negative number their own token
    The negation (-) operator will call Item->neg() one underlying numeric constants
    and remove itself (like the NOT() function does today for other NOT functions.

    This simplifies things
    - -1 is not anymore an expression but a basic_const_item
      - improves optimizer
      - DEFAULT -1 doesn't need special handling anymore
      - When we add DEFAULT expressions, -1 will be treated exactly like 1
    - printing of items doesn't anymore put braces around all negative numbers

    Other things fixed:
    - Fixed that longlong converted to decimal's has a more appropriate size
    - Fixed that "-0.0" read into a decimal is interpreted as 0.0
This commit is contained in:
Sergei Golubchik
2016-06-27 15:41:51 +02:00
parent 60916a8b9e
commit 23d03a1b1e
22 changed files with 157 additions and 93 deletions
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2
mysql-test/r/errors.result
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@@ -142,7 +142,7 @@ SELECT (CONVERT('0' USING latin1) IN (CHAR(COT('v') USING utf8),''));
ERROR 22003: DOUBLE value is out of range in 'cot('v')'
SET NAMES utf8 COLLATE utf8_latvian_ci ;
SELECT UPDATEXML(-73 * -2465717823867977728,@@global.auto_increment_increment,null);
ERROR 22003: BIGINT value is out of range in '(-(73) * -(2465717823867977728))'
ERROR 22003: BIGINT value is out of range in '(-73 * -2465717823867977728)'
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# End Bug#57882
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