feat(expr): support substring function
#792
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Signed-off-by: Runji Wang <wangrunji0408@163.com>
Signed-off-by: Runji Wang <wangrunji0408@163.com>
Signed-off-by: Runji Wang <wangrunji0408@163.com>
skyzh
approved these changes
Aug 3, 2023
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This function is used in TPC-H Q22.
We borrow the sqllogictest from duckdb and pass the common cases.
Null literal inputs are not supported yet. We may add implicit type cast in binder later.