fix: use-server-side-cursor is not working #746
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abhishekagrawal-atlan
requested review from
firecast and
inishchith
as code owners
📜 Docstring Coverage ReportRESULT: PASSED (minimum: 30.0%, actual: 75.8%) Detailed Coverage Report |
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Pull Request Overview
This PR fixes an issue where the use-server-side-cursor configuration was being ignored in SQL query execution. The fix ensures that when server-side cursors are enabled, database connections are properly configured to use them with appropriate batch sizing.
- Added server-side cursor configuration to SQL query execution
- Imported the
USE_SERVER_SIDE_CURSORconstant to check cursor settings - Applied execution options with
yield_per=100000when server-side cursors are enabled
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| if USE_SERVER_SIDE_CURSOR: | ||
| conn = conn.execution_options(yield_per=100000) |
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The magic number 100000 for yield_per should be extracted to a named constant or made configurable. This hardcoded value makes it difficult to tune performance for different use cases.
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🛠 Full Test Coverage Report: https://k.atlan.dev/coverage/application-sdk/pr/746 |
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| """ | ||
| with self.engine.connect() as conn: | ||
| if USE_SERVER_SIDE_CURSOR: | ||
| conn = conn.execution_options(yield_per=100000) |
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Bug: Server-Side Cursor Inconsistency and Yield Per Issue
Server-side cursor configuration is only applied in _execute_query, not _read_sql_query. This prevents async database connections from using server-side cursors, creating inconsistent behavior when USE_SERVER_SIDE_CURSOR is enabled. Additionally, the hardcoded yield_per=100000 value doesn't align with self.chunk_size, which could impact performance or memory.
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🛠 Docs available at: https://k.atlan.dev/application-sdk/fix-use-server-side-cursor |
inishchith
requested changes
Sep 30, 2025
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USE_SERVER_SIDE_CURSORto execute queries withyield_per=100000, avoiding full in-memory fetches.application_sdk/inputs/sql_query.py):USE_SERVER_SIDE_CURSORand, when enabled, setconn.execution_options(yield_per=100000)before running pandas read, enabling server-side cursor/batched fetching.Written by Cursor Bugbot for commit f992d89. This will update automatically on new commits. Configure here.