imay commented on a change in pull request #2482: fix core dump when using
datetime in window function
URL: https://github.com/apache/incubator-doris/pull/2482#discussion_r358824825
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File path: be/src/exprs/aggregate_functions.cpp
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@@ -2362,8 +2363,37 @@ void
AggregateFunctions::offset_fn_init(FunctionContext* ctx, T* dst) {
DCHECK(ctx->is_arg_constant(1));
DCHECK(ctx->is_arg_constant(2));
DCHECK_EQ(ctx->get_arg_type(0)->type, ctx->get_arg_type(2)->type);
- *dst = *static_cast<T*>(ctx->get_constant_arg(2));
+ T src = *static_cast<T*>(ctx->get_constant_arg(2));
+ // The literal null is sometimes incorrectly converted to int, so *dst =
src may cause SEGV
Review comment:
I'm not sure in which case this assign will cause SEGV. All Val is built-in
type except StringVal, it seems that it can not lead segment fault.
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