Add Oracle-compatible BIT_AND_AGG/BIT_OR_AGG/BIT_XOR_AGG aggregates - #2010
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Add Oracle-compatible BIT_AND_AGG/BIT_OR_AGG/BIT_XOR_AGG aggregates#2010muzimu217 wants to merge 2 commits into
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Oracle aggregates its bitwise functions over NUMBER operands truncated toward zero and performs the operations on the two's-complement representation. A signed 128-bit accumulator reproduces that exactly over Oracle's documented input range (-(2^127) .. 2^127-1); values beyond it are rejected, where Oracle 23ai silently returns meaningless results. NULL inputs are skipped, and an empty or all-NULL group yields 0 for all three aggregates, matching Oracle 23ai. The three aggregates support DISTINCT/ALL and GROUP BY usage. Fixes: IvorySQL#1734 Fixes: IvorySQL#1735 Fixes: IvorySQL#1736 Signed-off-by: muzimu217 <muzimu217@users.noreply.github.com>
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Included review availability: Your plan provides up to 4 included reviews per hour; 2 remain after this review. 📝 WalkthroughWalkthroughThe extension adds Oracle-compatible ChangesOracle bitwise aggregates
Priority: ➖ Normal Estimated code review effort: 4 (Complex) | ~45 minutes Change: Feature Sequence Diagram(s)sequenceDiagram
participant SQLAggregate
participant TransitionFunction
participant NumericConverter
participant AggregateState
participant FinalFunction
SQLAggregate->>TransitionFunction: submit numeric rows
TransitionFunction->>NumericConverter: truncate and validate each value
NumericConverter->>AggregateState: apply AND, OR, or XOR
AggregateState->>FinalFunction: provide accumulated state
FinalFunction->>SQLAggregate: return numeric result
Merge Risk: ⚪ Minimal · up to The new aggregate implementation is ready to merge based on the reviewed behavior and passing compatibility coverage. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 50.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 14 functions across 1 files. (2 skipped: 2 unsupported.)
✨ Finishing Touches🧪 Generate unit tests (beta)
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Inline comments:
In `@contrib/ivorysql_ora/sql/ora_bitwise_agg.sql`:
- Around line 95-104: Extend the full 128-bit range regression cases around
bit_or_agg to include the valid -2^127 boundary and the -2^127 - 1 underflow
case with its expected range error. Also add a BIT_OR_AGG or BIT_AND_AGG
invocation using OVER () with expected output to exercise window support, while
preserving the existing aggregate and implicit-cast coverage.
In `@contrib/ivorysql_ora/src/builtin_functions/bitwise_agg.c`:
- Line 353: Update the argument access in sys.bitwise_agg_deserialize so the
serialized bytea state is read from argument zero rather than the unused
internal argument at index one; keep the deserialization flow otherwise
unchanged.
- Around line 133-140: Update numeric_to_int128 to reject non-finite numeric
inputs before digit parsing, or validate that at least one decimal digit was
consumed after the optional sign. Ensure NaN, Infinity, and -Infinity cannot
leave mag at zero and be converted as valid zero values.
- Around line 191-192: Update both numeric conversion paths in the bitwise
aggregate finalization, including the zero-result path, to invoke numeric_in
with all three arguments via DirectFunctionCall3; preserve the existing returned
Datum behavior while supplying the required typmod arguments.
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📒 Files selected for processing (6)
contrib/ivorysql_ora/Makefilecontrib/ivorysql_ora/expected/ora_bitwise_agg.outcontrib/ivorysql_ora/meson.buildcontrib/ivorysql_ora/sql/ora_bitwise_agg.sqlcontrib/ivorysql_ora/src/builtin_functions/bitwise_agg.ccontrib/ivorysql_ora/src/builtin_functions/builtin_functions--1.0.sql
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- Call numeric_in via DirectFunctionCall3 in both final-result paths: numeric_in reads the typioparam (argument 1) and typmod (argument 2), which DirectFunctionCall1 left reading past the supplied argument array (CodeRabbit Critical). - Reject non-finite numeric inputs (NaN, Infinity, -Infinity) in numeric_to_int128 before digit parsing; numeric_out emits no digits for them, which silently converted them to zero (CodeRabbit Major). - Read the serialized state from argument zero in bitwise_agg_deserialize; argument one is the unused dummy internal parameter, which could abort parallel aggregation (CodeRabbit Major). - Extend regressions (CodeRabbit Minor): -2^127 lower boundary and -2^127-1 underflow with the expected range error, rejection of non-finite inputs, BIT_*_AGG(n) OVER () window aggregation, and a forced parallel aggregation case exercising serialize/deserialize. make oracle-check: all 30 tests passed.
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Description
Add the Oracle-compatible aggregate functions
BIT_AND_AGG,BIT_OR_AGGandBIT_XOR_AGGto theivorysql_oraextension.Oracle aggregates its bitwise functions over
NUMBERoperands truncated toward zero and performs the operations on the two's-complement representation, so negative inputs behave as if sign-extended to an unlimited width. This implementation uses a signed 128-bit accumulator, which reproduces Oracle's documented behaviour exactly over the input range-(2^127) .. 2^127-1:BIT_OR_AGG(2.9)= 2,BIT_OR_AGG(-2.9)= -2 on Oracle 23ai);DISTINCT/ALL,GROUP BYand (single-window)OVER ()usage work as with any PostgreSQL aggregate.Changes
contrib/ivorysql_ora/src/builtin_functions/bitwise_agg.c— the three transition functions plus a shared final function; the accumulator converts betweennumericand int128 through the exact decimal text form, so no internalNumericlayout details are neededcontrib/ivorysql_ora/src/builtin_functions/builtin_functions--1.0.sql— SQL definitions of the three aggregates in thesysschemacontrib/ivorysql_ora/sql/ora_bitwise_agg.sql+expected/ora_bitwise_agg.out— regression tests; expected values were verified against Oracle 23aiMakefile/meson.build— wire up the new source file and theora_bitwise_aggregression testVerification
make oracle-checkunderC.UTF-8,C,en_US.utf8andzh_CN.utf8: all 30 tests pass (no regressions in the existing 29, newora_bitwise_aggincluded)Fixes: #1734
Fixes: #1735
Fixes: #1736
Summary by CodeRabbit
New Features
BIT_AND_AGG,BIT_OR_AGG, andBIT_XOR_AGGaggregate functions.DISTINCT/ALL, grouping, window aggregation, and signed 128-bit values.0, while fractional values are truncated toward zero.Tests