Ruben Q L created CALCITE-7731:
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Summary: Bound plain-notation expansion of DECIMAL literals to
prevent parse-time OutOfMemoryError
Key: CALCITE-7731
URL: https://issues.apache.org/jira/browse/CALCITE-7731
Project: Calcite
Issue Type: Improvement
Components: core
Reporter: Ruben Q L
Fix For: 1.43.0
BigDecimal accepts any int exponent, so a DECIMAL literal such as {{DECIMAL
'1E2147483647'}} (~30 characters) parses to a BigDecimal whose plain-notation
form would be one character per digit: a multi-gigabyte allocation (potentially
an OOM error).
Three places call BigDecimal.toPlainString() on a value derived from
user-supplied input and would attempt that allocation:
- SqlParserUtil.parseDecimalLiteral
- SqlNumericLiteral.toValue
- RexBuilder.makeLiteral
It would be required to add a check in there to prevent an OOM error.
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