Skip to content

Honor Blob ranges and independent read cursors - #911

Merged
staticlibs merged 1 commit into
duckdb:mainfrom
hutiefang76:frank/newten-dd-blob-20261010-01a11186
Oct 18, 2026
Merged

staticlibs merged 1 commit into
duckdb:mainfrom
hutiefang76:frank/newten-dd-blob-20261010-01a11186

Conversation

@hutiefang76

Copy link
Copy Markdown
Contributor

Reading a bounded Blob stream currently returns the whole value, and advancing a stream or calling getBytes changes the cursor used by other reads. The fix duplicates the ByteBuffer for each read, bounds streams by the JDBC one-based position and requested length, and clips getBytes to the remaining bytes. Invalid ranges raise SQLException before integer conversion.

Validation on macOS arm64: compiled all Java production and test sources against the existing JNI artifact; ran test_blob (7 tests). New regressions fail against the original Java implementation and pass with this patch. The full official clang-format 11 check passes. Full native and multi-platform CI remain to be run.

AI assistance was used for implementation and source review.

Signed-off-by: hutiefang76 <137664623+hutiefang76@users.noreply.github.com>
@staticlibs

Copy link
Copy Markdown
Member

Hi, thanks for the PR! I need to do some more checks here - will follow-up a bit later.

@staticlibs staticlibs left a comment

Copy link
Copy Markdown
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Thanks for the PR! Looks good to me.

@staticlibs
staticlibs merged commit 7830e3a into duckdb:main Oct 18, 2026
31 of 32 checks passed
staticlibs pushed a commit that referenced this pull request Oct 18, 2026
This is a backport of the PR #911 to `v2.0-cyanoptera` branch.

Co-Authored-By: hutiefang76 <137664623+hutiefang76@users.noreply.github.com>
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Labels

None yet

Projects

None yet

Development

Successfully merging this pull request may close these issues.

2 participants