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character set introducer": add new item type to be returned before from Item_param until it's value is set. This way items like Item_bool_func2 and udf_handler won't treat this item as constant literal when statement is prepared. mysql-test/r/ps.result: Test results fixed (test case for bug #4105) mysql-test/t/ps.test: Followup to bug #4105: a test case. sql/item.cc: Fix for bug#4105 "Server crash on attempt to prepare a statement with character set introducer": add new item type to be returned before from Item_param until it's value is set. sql/item.h: Fix for bug#4105 "Server crash on attempt to prepare a statement with character set introducer": add new item type to be returned before from Item_param until it's value is set.
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