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fix(isthmus)!: honor decimal arithmetic overflow options - #1393
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nielspardon merged 10 commits intoOct 9, 2026
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SQL CONCAT and || now emit null_handling ACCEPT_NULLS for the standard Substrait concat function. Import accepts that behavior, including as a fallback preference, instead of silently discarding options. BREAKING CHANGE: Standard concat calls with null_handling preferences that do not include ACCEPT_NULLS, unknown options, or empty preference lists are rejected. Include ACCEPT_NULLS only when null propagation is acceptable.
Use one option policy for the standard concat, like, replace, starts_with, ends_with, strpos, substring, lower, upper and initcap mappings. Export the behavior implemented by the Calcite operator and reject import preferences that do not permit it. Other extensions and unmapped option policies are unchanged. BREAKING CHANGE: The covered standard string functions reject unknown options, empty preferences and preferences that do not include the mapped Calcite behavior. Allow that behavior only when it is acceptable for the query.
Export SILENT for native decimal arithmetic from spec v0.103.0. Reject ERROR and SATURATE for add, subtract, multiply and divide unless SILENT is an acceptable fallback, since Calcite does not enforce result precision. All overflow preferences are equivalent for valid modulus operands. BREAKING CHANGE: Isthmus rejects unsupported decimal arithmetic overflow preferences instead of silently ignoring them.
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WalkthroughDecimal arithmetic options are now handled during scalar function conversion. Matching decimal-result calls receive ChangesDecimal Arithmetic Options
Priority: ➖ Normal Estimated code review effort: 3 (Moderate) | ~25 minutes Change: Bug fix Sequence Diagram(s)sequenceDiagram
participant RexCall
participant ScalarFunctionConverter
participant DecimalFunctionOptions
participant ScalarFunctionInvocation
RexCall->>ScalarFunctionConverter: match scalar function
ScalarFunctionConverter->>DecimalFunctionOptions: generate options for call
DecimalFunctionOptions-->>ScalarFunctionConverter: options or no options
ScalarFunctionConverter->>ScalarFunctionInvocation: apply scalar function options
ScalarFunctionInvocation->>ScalarFunctionConverter: provide invocation and selected operator
ScalarFunctionConverter->>DecimalFunctionOptions: resolve invocation options
DecimalFunctionOptions-->>ScalarFunctionConverter: selected operator or unsupported option error
Suggested reviewers: Merge Risk: ⚪ Minimal · up to The previously identified invalid-preference case is addressed, and no remaining issue was established that would prevent merging after normal checks. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
✨ Finishing Touches🧪 Generate unit tests (beta)
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nielspardon
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#1390, #1392, #1394 and #1395 each add the same .options(...) line in generateBinding, and three of them add the same public getSqlOperatorFromSubstraitFunc(ScalarFunctionInvocation) overload with a different body, so whichever merges second conflicts and an easy resolution keeps only one policy. Could you land one shared, overridable option seam first (#1390's validateOptions is close) and rebase the four families onto it? That also gives custom converters a hook: right now one that remaps add:dec_dec can't import a plan isthmus itself exported.
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Inline comments:
Review comments at
@isthmus/src/main/java/io/substrait/isthmus/expression/DecimalFunctionOptions.java:
- Around line 67-70: Update the overflow-option handling in
DecimalFunctionOptions to validate every supplied value against the declared set
before selecting a preference. Reject the invocation if any value is undeclared,
while preserving first-supported preference selection for valid values such as
ERROR followed by SILENT.
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nielspardon
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looks like you'll need to merge main and resolve conflicts |
nielspardon
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Oct 9, 2026
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Calcite decimal arithmetic can exceed the declared precision. Export overflow=SILENT for native binary operators; import ERROR/SATURATE requires a SILENT fallback. Modulus cannot overflow for valid operands, so all three overflow preferences are accepted.
Option matching is case-insensitive; undeclared values are rejected before fallback selection. Type derivation, rounding and aggregate options remain outside this change.
Part of #1173.
BREAKING CHANGE: Unsupported decimal preferences are rejected. Export names SILENT explicitly, so consumers supporting only ERROR must reject these plans. Undeclared values fail even with a supported fallback.