Resovle the problem that load snapshot failure after add statement "alter table column data type" #17004
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…d preAlterColumn in these old snapshot data. Due to all data involved tableNode are stored consecutively in the snapshot file. The content of each element during serialization is of variable length, making it impossible to identify the information of preAlteredColumn. So increment a identify to find the position that can read preAlterColumn.
jt2594838
approved these changes
Jan 8, 2026
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The key cause by load snapshot failure is that nonclude bytes involved preAlterColumn in these old snapshot data. Due to all data involved tableNode are stored consecutively in the snapshot file. The content of each element during serialization is of variable length, making it impossible to identify the information of preAlteredColumn. So increment a identify to find the position that can read preAlterColumn.
