FIXBUG: 【prepare】修复COM_STMT_EXECUTE，new_params_bind_flag为0分支的协议处理bug：没有复用parameter_types#629
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carsonfeng wants to merge 2 commits intoflike:masterfrom
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FIXBUG: 【prepare】修复COM_STMT_EXECUTE，new_params_bind_flag为0分支的协议处理bug：没有复用parameter_types#629carsonfeng wants to merge 2 commits intoflike:masterfrom
carsonfeng wants to merge 2 commits intoflike:masterfrom
