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Reject reader timestamp types without a second-based unit - #25029
Both readers convert timestamps to a second-based unit only, but parquet_reader_options::set_timestamp_type and orc_reader_options::set_timestamp_type accepted any data_type. A TIMESTAMP_DAYS request made the Parquet reader decode seconds as 8-byte values into a column allocated at 4 bytes per row (wrong values, and rows written past the allocation); the ORC decode kernel stores nanosecond counts the same way.
Both setters now throw std::invalid_argument unless the type is EMPTY or a TIMESTAMP type other than TIMESTAMP_DAYS, which also rejects the duration types the readers accepted by accident. The Java withTimeUnit builders throw IllegalArgumentException for the same set, and cudf.read_orc(timestamp_type=...) raises ValueError. The CSV and JSON readers parse into any requested timestamp type and are unchanged.
Tests: TimestampTypeMustHaveSecondBasedUnit in ParquetReaderTest and OrcReaderTest cover the setters, and ParquetReaderTest.ReadTimestampsAsSeconds reads TIMESTAMP(MILLIS), (MICROS) and (NANOS) columns back as TIMESTAMP_SECONDS.
The Parquet reader rescales timestamps by a clock rate in ticks per second that to_clockrate derives from the type's period denominator, which is 1 for TIMESTAMP_DAYS exactly as for TIMESTAMP_SECONDS, so a request for day resolution decoded seconds as 8-byte values into a column allocated at 4 bytes per row. The ORC decode kernel has no case for days either and stores nanosecond counts the same way. parquet_reader_options::set_timestamp_type and orc_reader_options::set_timestamp_type now accept EMPTY and the four timestamp types from seconds to nanoseconds only and throw cudf::logic_error otherwise, with the accepted set documented; the Java option builders assert the same set. The CSV and JSON readers, which parse into any timestamp type, are unchanged.
ClosesNVIDIA#25025.
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Summary
Summary by CodeRabbit
Bug Fixes
ORC and Parquet reader options now reject unsupported timestamp types, including day-based timestamps and non-timestamp types. Rejected selections leave the previous setting unchanged.
Java reader options accept empty or supported time-based types and reject null or unsupported types.
Reading higher-resolution timestamps as seconds floors values to whole seconds, including negative timestamps.
Documentation
Clarified that supported timestamp resolutions range from seconds through nanoseconds.
ORC and Parquet reader options now validate timestamp output types in C++ and Java. They accept EMPTY and second-through-nanosecond timestamp types. Tests cover rejection of unsupported types and Parquet reads that convert timestamps to seconds.
Changes: Timestamp output type validation
Layer / File(s)
Summary
C++ reader option validation cpp/include/cudf/io/orc.hpp, cpp/include/cudf/io/parquet.hpp, cpp/tests/io/orc_test.cpp, cpp/tests/io/parquet_reader_test.cpp
ORC and Parquet setters accept EMPTY and timestamp types from seconds through nanoseconds. Other types throw cudf::logic_error. Tests cover accepted and rejected types, preservation of the previous setting after rejection, and builder rejection. Parquet tests also check conversion to seconds, including negative values.
withTimeUnit accepts DType.EMPTY or types with time resolution and throws IllegalArgumentException for null or unsupported types. Documentation lists supported timestamp units and directs callers to cast output columns for timestamp days. Tests cover accepted units and rejection of timestamp days.
The change rejects unsupported timestamp units consistently across C++ and Java, and no merge-blocking risk is established.
Pre-merge checks: 3 · 1 · 1
Failed checks: 1 warning · 1 inconclusive
Check name
Status
Explanation
Resolution
Out of Scope Changes check
The Parquet and ORC setter validation, doxygen, builder documentation and tests implement the reader timestamp contract of #25025. The Java withTimeUnit validation in ParquetOptions.java also supp…
Remove the unrelated SPDX copyright header changes from java/src/main/java/ai/rapids/cudf/ParquetOptions.java and java/src/main/java/ai/rapids/cudf/ORCOptions.java, or move them to a separate change.
Docstring Coverage
Docstring coverage is 66.67% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff with cyclomatic complexity of at least 2. Documenta…
Write docstrings for the functions missing them to satisfy the coverage threshold.
Passed checks: 3 passed
Check name
Status
Explanation
Title check
The title clearly and concisely identifies the main change: rejecting reader timestamp types without a second-based unit.
Linked Issues check
Directly linked issue #25025 permits either flooring TIMESTAMP_DAYS to days or rejecting TIMESTAMP_DAYS with an error. The PR takes the rejection path. At the reviewed head, `cpp/include/cudf/io/p…
Description check
The description names the Parquet and ORC timestamp-type setters, the TIMESTAMP_DAYS bug, the new exception behavior in the setters and Java builders, the cudf.read_orc change, and the tests added. It…
Full details: Linked Issues check
Explanation
Directly linked issue #25025 permits either flooring TIMESTAMP_DAYS to days or rejecting TIMESTAMP_DAYS with an error. The PR takes the rejection path. At the reviewed head, cpp/include/cudf/io/parquet.hppparquet_reader_options::set_timestamp_type calls CUDF_EXPECTS(type.id() == type_id::EMPTY or (cudf::is_timestamp(type) and type.id() != type_id::TIMESTAMP_DAYS), ...). The accepted set is EMPTY plus TIMESTAMP_SECONDS, MILLISECONDS, MICROSECONDS and NANOSECONDS. TIMESTAMP_DAYS and duration types fail the check, so the Parquet decode path no longer receives a day-typed target. The builder timestamp_type documentation and the setter doxygen state the accepted set and the cast-for-coarser-unit guidance. The PR reports ParquetReaderTest.TimestampTypeMustHaveSecondBasedUnit, ParquetReaderTest.ReadTimestampsAsSeconds and PARQUET_TEST passing. This pass did not re-read the Parquet test file or run tests; the evidence is the header diff and the PR report. The ORC setter and Java builders are supporting changes. They are not required to establish the #25025 Parquet outcome.
Full details: Description check
Explanation
The description names the Parquet and ORC timestamp-type setters, the TIMESTAMP_DAYS bug, the new exception behavior in the setters and Java builders, the cudf.read_orc change, and the tests added. It matches the changeset, so the check passes.
Full details: Out of Scope Changes check
Explanation
The Parquet and ORC setter validation, doxygen, builder documentation and tests implement the reader timestamp contract of #25025. The Java withTimeUnit validation in ParquetOptions.java also supports that contract. The copyright header edits remain at the reviewed head. The whole-PR diff of java/src/main/java/ai/rapids/cudf/ParquetOptions.java changes the SPDX line from Copyright (c) 2019, NVIDIA CORPORATION. to Copyright (c) 2019-2026, NVIDIA CORPORATION & AFFILIATES. All rights reserved.. The AI summary reports the same header change in ORCOptions.java. These metadata edits do not implement #25025 or the reader validation objective. Java builder behavior was not verified in this pass. DType.hasTimeResolution() was not inspected, so it is unknown whether it excludes TIMESTAMP_DAYS and duration types as TableTest.testReaderTimeUnitRejectsTimestampDays expects.
Resolution
Remove the unrelated SPDX copyright header changes from java/src/main/java/ai/rapids/cudf/ParquetOptions.java and java/src/main/java/ai/rapids/cudf/ORCOptions.java, or move them to a separate change.
Full details: Docstring Coverage
Explanation
Docstring coverage is 66.67% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff with cyclomatic complexity of at least 2. Documentation-only edits and deletions within surviving functions are included; unchanged diff context and fully deleted functions are excluded. Analyzed 6 functions across 6 files. (1 skipped: 1 too large.)
Resolution
Write docstrings for the functions missing them to satisfy the coverage threshold.
Finishing Touches
Generate unit tests (beta)
Create a new PR
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Included review availability: This review used your included allowance. Your plan provides up to 12 included reviews per hour; 11 remain after this review.
The reader option setters test the type with cudf::is_timestamp and
exclude TIMESTAMP_DAYS instead of listing the four units, and their
doxygen puts @throw before @PARAM as the documentation guide's example
does. ParquetReaderTest.ReadTimestampsAsSeconds reads TIMESTAMP(MILLIS),
(MICROS) and (NANOS) columns back as TIMESTAMP_SECONDS, which the typed
reader tests never request, and checks the floor to whole seconds. The
Java builders document DType.EMPTY as the default, and
TableTest.testReaderTimeUnitRejectsTimestampDays checks that both reject
TIMESTAMP_DAYS and accept the four second-based units and the default.
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Actionable comments posted: 1
Fix comments: Fix CodeRabbit comments on this PR
Prompt to fix all issues
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Inline comments:
Review comments at @java/src/main/java/ai/rapids/cudf/ORCOptions.java:
- Line 83: Replace the assertion in ORCOptions with runtime validation that
throws IllegalArgumentException for invalid units, and apply the same validation
in ParquetOptions. Update the relevant test to expect IllegalArgumentException
while preserving acceptance of valid units.
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Included review availability: This review used your included allowance. Your plan provides up to 12 included reviews per hour; 11 remain after this review.
The ParquetOptions and ORCOptions builders checked withTimeUnit with an
assertion, which a JVM without -ea skips, leaving the libcudf reader to
reject the unit when the read runs. They now throw
IllegalArgumentException like the other option builders, and
TableTest.testReaderTimeUnitRejectsTimestampDays expects it.
Review round on NVIDIA#25029: the setter doc blocks in orc.hpp and parquet.hpp
say in one line that TIMESTAMP_DAYS resolution is not supported, all four
@throw lines (setters and builders) name std::invalid_argument, the
CUDF_EXPECTS throws that type with a reworded message, and the tests
expect it. The Java Javadocs and messages are shortened the same way, and
TableTest.testReaderTimeUnitRejectsTimestampDays is removed because it
mirrors the C++ setter tests.
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galipremsagar
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Description
Closes #25025.
Both readers convert timestamps to a second-based unit only, but
parquet_reader_options::set_timestamp_typeandorc_reader_options::set_timestamp_typeaccepted anydata_type. ATIMESTAMP_DAYSrequest made the Parquet reader decode seconds as 8-byte values into a column allocated at 4 bytes per row (wrong values, and rows written past the allocation); the ORC decode kernel stores nanosecond counts the same way.Both setters now throw
std::invalid_argumentunless the type isEMPTYor aTIMESTAMPtype other thanTIMESTAMP_DAYS, which also rejects the duration types the readers accepted by accident. The JavawithTimeUnitbuilders throwIllegalArgumentExceptionfor the same set, andcudf.read_orc(timestamp_type=...)raisesValueError. The CSV and JSON readers parse into any requested timestamp type and are unchanged.Tests:
TimestampTypeMustHaveSecondBasedUnitinParquetReaderTestandOrcReaderTestcover the setters, andParquetReaderTest.ReadTimestampsAsSecondsreads TIMESTAMP(MILLIS), (MICROS) and (NANOS) columns back asTIMESTAMP_SECONDS.Checklist