[fix](expr) avoid crashing caused by big depth of expression tree #17314
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Contributor
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clang-tidy review says "All clean, LGTM! 👍" |
yiguolei
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Mar 2, 2023
be/src/vec/exprs/vexpr.cpp
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| int max_child_depth = 0; | ||
| for (int i = 0; i < _children.size(); ++i) { | ||
| RETURN_IF_ERROR(_children[i]->prepare(state, row_desc, context)); | ||
| if ((context->_depth_num - old_depth) > max_child_depth) { |
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--context->_depth_num is OK?
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clang-tidy review says "All clean, LGTM! 👍" |
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PR approved by at least one committer and no changes requested. |
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./run buildall |
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PR approved by anyone and no changes requested. |
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Proposed changes
When the tree is too deep, too many recursive calls will cause stack overflow.
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If this is a relatively large or complex change, kick off the discussion at dev@doris.apache.org by explaining why you chose the solution you did and what alternatives you considered, etc...