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MDEV-12001 Split Item_func_round::fix_length_and_dec to virtual methods in Type_handler

This patch makes the following changes (according to the task description):
- Adds Type_handler::Item_func_round_fix_length_and_dec().
- Splits the code from Item_func_round::fix_length_and_dec() into new
  Item_func_round methods fix_arg_int(), fix_arg_decimal(), fix_arg_double().
- Calls the new Item_func_round methods from the relevant implementations of
  Type_handler_xxx::Item_func_round_fix_length_and_dec().
- Adds a new error message ER_ILLEGAL_PARAMETER_DATA_TYPE_FOR_OPERATION
- Makes ROUND() return the new error for GEOMETRY

Additionally:
- Inherits Item_func_round directly from Item_func_numhybrid as it
  uses nothing from Item_func_num1.
- Fixes "MDEV-12000 ROUND(expr,const_expr_returning_NULL) creates DOUBLE(0,0)".
  Now if args[1] returns NULL, the data type is set to DOUBLE with
  NOT_FIXED_DEC decimals instead of 0 decimals.
This commit is contained in:
Alexander Barkov
2017-02-07 21:07:28 +04:00
parent d333e3ad9c
commit 3f83801d82
10 changed files with 232 additions and 73 deletions

View File

@ -3711,5 +3711,14 @@ CASE a WHEN POINT(1,1) THEN "a" WHEN POINT(1,2) THEN "b" END
DROP PROCEDURE p1;
DROP PROCEDURE p2;
#
# MDEV-12001 Split Item_func_round::fix_length_and_dec to virtual methods in Type_handler
#
CREATE TABLE t1 (a GEOMETRY);
SELECT ROUND(a) FROM t1;
ERROR HY000: Illegal parameter data type geometry for operation 'round'
DROP TABLE t1;
SELECT ROUND(POINT(1,1));
ERROR HY000: Illegal parameter data type geometry for operation 'round'
#
# End of 10.3 tests
#