Codex agent at work

[patelraj0602]

PROMPT TO THE AGENT

Document-Store Library PostgreSQL Query Interface Refactoring

CONTEXT & BACKGROUND

You are working with the document-store library, which provides a QueryLayer interface for consuming services. The library has two critical interfaces:

1. Datastore Interface: @document-store/src/main/java/org/hypertrace/core/documentstore/Datastore.java
   • Has concrete implementations for MongoDB and PostgreSQL
2. Collection Interface: @document-store/src/main/java/org/hypertrace/core/documentstore/Collection.java
   • Provides CRUD operations APIs for underlying databases

SCOPE: Focus exclusively on the PostgreSQL implementation located at:
@document-store/src/main/java/org/hypertrace/core/documentstore/postgres

Specifically, concentrate on the PostgreSQL implementations of:

• Datastore interface
• Collection interface (query API only)

CURRENT PROBLEM
The PostgreSQL implementation of the query interface has a critical limitation:

• CONSTRAINT: Only supports query building for JSONB type columns and the implementation is jsonb aware
• LOCATION: Hardcoded outer-column list in @document-store/src/main/java/org/hypertrace/core/documentstore/postgres/utils/PostgresUtils.java
• IMPACT: Cannot query other column data types

REFACTORING GOALS

Primary Goal (Priority 1):
Extend query generation support to include these data types while maintaining extensible design:

• String
• Long
• Double
• Boolean
• TextArray

Secondary Goal (Future Enhancement):
The output parsing already exists in:
@document-store/src/main/java/org/hypertrace/core/documentstore/postgres/PostgresCollection.java:PostgresResultIteratorWithBasicTypes:prepareDocument
Query results should be parsed and returned as JsonNode (acknowledge existing support, will enhance later).

CURRENT IMPLEMENTATION DETAILS

Existing Workaround:
A temporary solution exists in FieldToPgColumnTransformer:transform that handles first-class fields based on:
flatStructureCollection.equals(postgresQueryParser.getTableIdentifier().getTableName())

Recent Interface Additions:
The following interfaces have been created for SQL query generation for first-class fields:

1. PostgresContainsRelationalFilterParserInterface.java
2. PostgresInRelationalFilterParserInterface.java
3. PostgresNotContainsRelationalFilterParser.java
4. PostgresNotInRelationalFilterParser.java
5. PostgresRelationalFilterParserFactoryImpl.java

IMPLEMENTATION REQUIREMENTS

Mandatory Constraints:

1. Registry Pattern: PostgresDatastore:getCollection API must create a registry containing PostgreSQL attribute-to-datatype mappings for query generation. You can interact with the database to create the mappings.
2. Type-Based Decision Making: Implementation selection must be determined by type lookup from the registry.

The registry-based approach should replace the current hardcoded pattern:

• Current pattern: flatStructureCollection.equals(context.getTableIdentifier().getTableName()...
• New pattern: <NewlyCreatedRegistry>:<isFirstClassColumn>

This registry lookup will determine whether to use JSON or non-JSON parser implementations. The decision affects the following parser pairs:

• PostgresContainsRelationalFilterParser (JSON) vs PostgresContainsRelationalFilterParserNonJsonField (non-JSON)
• PostgresInRelationalFilterParser (JSON) vs PostgresInRelationalFilterParserNonJsonField (non-JSON)

Additional parser classes that currently handle only JSON-based query generation must have corresponding non-JSON implementations created. Reference implementations for the non-JSON variants are available at:
document-store/src/main/java/org/hypertrace/core/documentstore/postgres/query/v1/parser/filter/nonjson/field/

3. Extensibility: Design must accommodate future data type additions
4. Test Compatibility: All changes must pass existing unit tests in @document-store/src/test/java/org/hypertrace/core/documentstore/postgres

Input/Output Specification:

• INPUT: /Users/rajpatel/Desktop/work/document-store/document-store/src/main/java/org/hypertrace/core/documentstore/query/Query
• OUTPUT: JSON document via /Users/rajpatel/Desktop/work/document-store/document-store/src/main/java/org/hypertrace/core/documentstore/JSONDocument.java

DELIVERABLES

Please provide:

1. Architecture Design: Detailed explanation of your refactoring approach
2. Implementation Plan: Step-by-step breakdown of required changes
3. Code Changes: All modified/new classes with clear explanations
4. Registry Implementation: Complete registry design for attribute-to-datatype mappings
5. Type Resolution Logic: How the system will determine which implementation to use
6. Extensibility Strategy: How future data types can be easily added

SUCCESS CRITERIA

• Query generation works for all specified data types (String, Long, Double, Boolean, TextArray) ignore jsonb for now, because it's difficult to build registry mapping for jsonb fields.
• Registry pattern implemented in PostgresDatastore:getCollection
• Type-based implementation selection working correctly
• Able to build the repo and pass existing unit tests pass
• Design allows easy addition of new data types
• Code maintains existing input/output contracts

ADDITIONAL NOTES

• Feel free to add new interfaces and perform necessary refactoring
• Prioritize clean, maintainable code architecture
• Consider performance implications of your design choices
• Document any assumptions or design decisions made during implementation

[codecov]

Codecov Report

❌ Patch coverage is 67.02703% with 61 lines in your changes missing coverage. Please review.
✅ Project coverage is 78.19%. Comparing base (e869f86) to head (20d6116).

Files with missing lines	Patch %	Lines
.../postgres/registry/PostgresColumnRegistryImpl.java	76.92%	11 Missing and 1 partial ⚠️
...core/documentstore/postgres/PostgresDatastore.java	47.36%	10 Missing ⚠️
...entstore/postgres/registry/PostgresColumnInfo.java	33.33%	10 Missing ⚠️
...entstore/postgres/registry/PostgresColumnType.java	54.54%	7 Missing and 3 partials ⚠️
...ore/documentstore/postgres/PostgresCollection.java	75.00%	3 Missing and 2 partials ⚠️
...ter/PostgresNotContainsRelationalFilterParser.java	54.54%	2 Missing and 3 partials ⚠️
...er/filter/PostgresNotInRelationalFilterParser.java	55.55%	2 Missing and 2 partials ⚠️
.../documentstore/postgres/PostgresQueryExecutor.java	66.66%	2 Missing ⚠️
...ter/PostgresRelationalFilterParserFactoryImpl.java	91.66%	0 Missing and 1 partial ⚠️
...ery/v1/transformer/FieldToPgColumnTransformer.java	88.88%	0 Missing and 1 partial ⚠️
... and 1 more

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #228      +/-   ##
============================================
- Coverage     78.55%   78.19%   -0.37%     
- Complexity     1069     1086      +17     
============================================
  Files           206      210       +4     
  Lines          5228     5383     +155     
  Branches        449      466      +17     
============================================
+ Hits           4107     4209     +102     
- Misses          813      858      +45     
- Partials        308      316       +8     

Flag	Coverage Δ
integration	78.19% <67.02%> (-0.37%)	⬇️
unit	55.30% <40.00%> (-0.54%)	⬇️

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[github-actions]

Test Results

 40 files  ±0   40 suites  ±0   35s ⏱️ -1s
247 tests ±0  247 ✅ ±0  0 💤 ±0  0 ❌ ±0 
503 runs  ±0  503 ✅ ±0  0 💤 ±0  0 ❌ ±0 

Results for commit 20d6116. ± Comparison against base commit e869f86.