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build: :core:jar and :core:shadowJar write the same file, so :isthmus:build runs its tests without the ANTLR runtime

Status: Open.

#1142 In substrait-io/substrait-java;

· alexandrefimov opened on Aug 21, 2026

core: return-type derivation supports only decimal and wildcard shapes, so resolveType throws for 86 variants

Status: Open.

#1139 In substrait-io/substrait-java;

· alexandrefimov opened on Aug 20, 2026

spark: interval_year literal conversion silently wraps on Int overflow

bugSomething isn't workingSomething isn't working

spark

Status: Open.

#1138 In substrait-io/substrait-java;

· nielspardon opened on Aug 19, 2026

core: interval literals and types accept component values the Substrait spec disallows

bugSomething isn't workingSomething isn't working

corePull requests that update java codePull requests that update java code

Status: Open.

#1129 In substrait-io/substrait-java;

· nielspardon opened on Aug 19, 2026

isthmus: a pre-epoch precision_timestamp with a fractional second throws converting to Calcite

Status: Open.

#1126 In substrait-io/substrait-java;

· alexandrefimov opened on Aug 18, 2026

spark: interval_day and precision_timestamp plans are rejected unless the precision is exactly 6

Status: Open.

#1125 In substrait-io/substrait-java;

· alexandrefimov opened on Aug 18, 2026

isthmus: derive the Calcite type system's limits from a Substrait dialect instead of hardcoding them

enhancementNew feature or requestNew feature or request

isthmus

Status: Open.

#1124 In substrait-io/substrait-java;

· nielspardon opened on Aug 18, 2026

AdvancedExtensionRelProtoConversionTest hand-rolls a third per-relation sample set

Status: Open.

#1123 In substrait-io/substrait-java;

· nielspardon opened on Aug 18, 2026

isthmus: Calcite→Substrait takes the function output type from the Rex node, so date ± interval_day is emitted with a non-conformant output type

Status: Open.

#1117 In substrait-io/substrait-java;

· alexandrefimov opened on Aug 18, 2026

isthmus: add(date, interval_day<P>) Calcite inference disagrees with the Substrait output type

Status: Open.

#1116 In substrait-io/substrait-java;

· alexandrefimov opened on Aug 17, 2026

isthmus: Calcite→Substrait normalizes time/timestamp/interval-day literal precision to microseconds

Status: Open.

#1114 In substrait-io/substrait-java;

· alexandrefimov opened on Aug 17, 2026

isthmus: precision_timestamp_tz literals cap at precision 3 converting to Calcite and come back as plain precision_timestamp

Status: Open.

#1113 In substrait-io/substrait-java;

· alexandrefimov opened on Aug 17, 2026