Jiyoung Yoo created IMPALA-15532:
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Summary: Incorrect result in instr() function when start position
overflows 32-bit integer
Key: IMPALA-15532
URL: https://issues.apache.org/jira/browse/IMPALA-15532
Project: IMPALA
Issue Type: Bug
Reporter: Jiyoung Yoo
In instr() string function, passing a 64-bit integer as the 'position' argument
can lead to integer overflow when implicitly converted or cast to int32_t or
uint32_t.
As a result, when the start position is outside the string boundary, the
function returns an incorrect non-zero index instead of returning '0' (not
found).
Examples:
instr('corporate floor', 'or', 4294967297) -> returns 2 (expected 0)
instr('corporate floor', 'or', -4294967294) -> returns 14 (expected 0)
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