Review API docs in BI editor#1241
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daneshk
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aashikam,
niveathika and
shafreenAnfar
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Pull Request Overview
This PR updates API documentation throughout the PostgreSQL Ballerina library to improve clarity, consistency, and accuracy. The changes focus on enhancing docstring descriptions for client methods, listener operations, and configuration types.
- Improved documentation clarity and consistency across client operations (query, execute, call, etc.)
- Enhanced parameter descriptions and return value documentation
- Updated terminology from "Postgres" to "PostgreSQL" for consistency
Reviewed Changes
Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.
| File | Description |
|---|---|
| ballerina/procedure_params.bal | Added comprehensive docstrings for CustomResultIterator methods |
| ballerina/listener_types.bal | Updated "Postgres" references to "PostgreSQL" in configuration documentation |
| ballerina/client.bal | Extensively improved client method documentation with clearer descriptions and parameter details |
| ballerina/cdc_listener.bal | Enhanced error return type documentation to specify cdc:Error |
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Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## main #1241 +/- ##
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- Coverage 81.63% 81.57% -0.06%
+ Complexity 864 863 -1
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Files 28 28
Lines 3523 3523
Branches 484 484
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- Hits 2876 2874 -2
- Misses 431 432 +1
- Partials 216 217 +1 ☔ View full report in Codecov by Sentry. 🚀 New features to boost your workflow:
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📝 WalkthroughWalkthroughThis PR updates documentation across PostgreSQL client and CDC listener components, clarifying API descriptions, parameter types, and return behaviors. Additionally, two new public methods are added to the CustomResultIterator class for querying stored procedure results. Changes
Estimated code review effort🎯 3 (Moderate) | ⏱️ ~20 minutes Suggested reviewers
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Actionable comments posted: 1
🧹 Nitpick comments (1)
ballerina/procedure_params.bal (1)
617-624: Documentation should mention thenilreturn case.The return type is
record {}|sql:Error?, but the documentation only mentions returning a record or ansql:Error. Thenilcase (when there are no more results) should be documented for completeness.📝 Suggested documentation improvement
# Retrieves the next result from the `sql:ResultIterator`. # # + iterator - The `sql:ResultIterator` to fetch the next result from. - # + return - A record containing the next result, or an `sql:Error` if an error occurs. + # + return - A record containing the next result, `()` if there are no more results, or an `sql:Error` if an error occurs.🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed. In `@ballerina/procedure_params.bal` around lines 617 - 624, The doc comment for public isolated function nextResult(sql:ResultIterator iterator) must document the nil return case: update the description and the "+ return" line to state that the function returns the next record, nil when there are no more results, or an sql:Error if an error occurs; ensure the wording references nextResult and the return type record {}|sql:Error? so callers know nil signifies end-of-iteration.
🤖 Prompt for all review comments with AI agents
Verify each finding against the current code and only fix it if needed.
Inline comments:
In `@ballerina/client.bal`:
- Line 146: Update the documentation comment for the Options type so that the
unit for cachedMetadataFieldSize is "mebibytes" (MiB) instead of "megabytes" to
match the actual unit used and remain consistent with
preparedStatementCacheSize; change the wording for cachedMetadataFieldSize in
the comment where it appears so it reads "mebibytes" and mentions MiB/2^20 bytes
as needed.
---
Nitpick comments:
In `@ballerina/procedure_params.bal`:
- Around line 617-624: The doc comment for public isolated function
nextResult(sql:ResultIterator iterator) must document the nil return case:
update the description and the "+ return" line to state that the function
returns the next record, nil when there are no more results, or an sql:Error if
an error occurs; ensure the wording references nextResult and the return type
record {}|sql:Error? so callers know nil signifies end-of-iteration.
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📒 Files selected for processing (4)
ballerina/cdc_listener.balballerina/client.balballerina/listener_types.balballerina/procedure_params.bal
| # + cachedMetadataFieldSize - The maximum size (in megabytes) of fields to be cached per connection. | ||
| # A value of 0 disables the cache | ||
| # + cachedMetadataFieldsCount - The maximum number of fields to be cached per connection. A value of 0 disables the cache | ||
| # + cachedMetadataFieldSize - The maximum size in megabytes of fields to be cached per connection. A value of 0 disables the cache |
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🧩 Analysis chain
🌐 Web query:
PostgreSQL JDBC cachedMetadataFieldSize preparedStatementCacheSize units documentation
💡 Result:
The PostgreSQL JDBC driver (pgJDBC) provides two relevant connection properties for caching: databaseMetadataCacheFieldsMiB (also referenced as cachedMetadataFieldSize in some contexts) and preparedStatementCacheSizeMiB (also referenced as preparedStatementCacheSize). databaseMetadataCacheFieldsMiB: Specifies the maximum size in megabytes (MiB, mebibytes = 1024*1024 bytes) of fields to be cached per connection. Default: 5. A value of 0 disables the cache. This limits memory usage for the field metadata cache. Related: databaseMetadataCacheFields: Maximum number of fields to cache per connection (integer count). Default: 65536. 0 disables. preparedStatementCacheSizeMiB: Specifies the maximum size in mebibytes (MiB) of the prepared queries cache per connection. Default: 5. Limits to prevent OutOfMemoryError when caching many queries. 0 disables. Related: preparedStatementCacheQueries: Maximum number of queries (entries) to cache per connection. Default: 256. 0 disables. These properties are set via JDBC URL parameters (e.g., ?preparedStatementCacheSizeMiB=10) or Properties object. Each connection has its own independent cache. Official documentation: https://jdbc.postgresql.org/documentation/use/ (Initializing the Driver section) and PGProperty enum docs confirm "megabytes" and "mebibytes" explicitly.
Citations:
- 1: https://jdbc.postgresql.org/documentation/use/
- 2: https://jdbc.postgresql.org/documentation/publicapi/org/postgresql/PGProperty.html
- 3: https://pgjdbc.github.io/pgjdbc/documentation/use/
- 4: https://jdbc.postgresql.org/documentation/use
Change "megabytes" to "mebibytes" on line 146 for consistency.
According to the PostgreSQL JDBC driver documentation, both cachedMetadataFieldSize and preparedStatementCacheSize use mebibytes (MiB, 2^20 bytes) as their actual unit. Line 146 currently reads "megabytes," which conflicts with the accurate terminology on line 151 ("mebibytes"). Update line 146 to "mebibytes" to match both the actual unit and the consistent terminology across the Options type documentation.
🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed.
In `@ballerina/client.bal` at line 146, Update the documentation comment for the
Options type so that the unit for cachedMetadataFieldSize is "mebibytes" (MiB)
instead of "megabytes" to match the actual unit used and remain consistent with
preparedStatementCacheSize; change the wording for cachedMetadataFieldSize in
the comment where it appears so it reads "mebibytes" and mentions MiB/2^20 bytes
as needed.
| # + s - The CDC service to attach | ||
| # + name - Attachment points | ||
| # + return - An error if the service cannot be attached, or `()` if successful | ||
| # + return - An `cdc:Error` if the service cannot be attached, or `()` if successful |
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Shouldn't this be A cdc:Error?
Purpose
Related issue: ballerina-platform/ballerina-library#8275
Examples
Checklist
Overview
This pull request improves the API documentation for the PostgreSQL module to enhance clarity and consistency in the Ballerina IDE editor. The changes consist primarily of documentation refinements across multiple modules, along with the addition of two new utility methods for procedure result iteration.
Key Changes
Documentation Updates
query,queryRow,execute,batchExecute,call,close) and configuration types (ClientConfiguration,Options,SSLMode,SecureSocket,CertKey). Documentation now provides clearer parameter descriptions, return value guidance, and usage examples while maintaining backward compatibility with existing public API signatures.cdc:Errorvs generic error descriptions).New Functionality
CustomResultIteratorclass:nextResult()- enables retrieval of the next result from a SQL result iteratorgetNextQueryResult()- enables retrieval of the next query result from a procedure call resultThese additions support improved handling of result iteration when working with stored procedure calls.
Impact
All changes maintain backward compatibility with existing public API signatures. The updates focus on improving developer experience through clearer documentation and enhanced result iteration capabilities for advanced use cases.