# Interface Contracts Quality Checklist: Drop Procedure

**Purpose**: Validate interface requirements quality and completeness
**Created**: 2026-05-16
**Audience**: Reviewer (PR)
**Strictness**: Rigorous
**Feature**: [spec.md](../spec.md)

## Syntax and Parsing Rules
- [ ] CHK001 - Are the allowed identifier formats for `<procedure_name>` explicitly defined? [Completeness, Spec §3.1]
- [ ] CHK002 - Is the position and optionality of the `IF EXISTS` clause clearly specified in the syntax grammar? [Clarity, Spec §3.2]
- [ ] CHK003 - Does the specification define whether the statement supports schema-qualified names (e.g., `DROP PROCEDURE public.my_proc`)? [Coverage, Gap]
- [ ] CHK004 - Are parsing requirements for whitespace and case-insensitivity of the keywords `DROP`, `PROCEDURE`, `IF`, `EXISTS` documented? [Completeness, Gap]

## Execution Semantics
- [ ] CHK005 - Is the exact sequence of catalog modifications upon a successful drop documented? [Completeness, Spec §3.4]
- [ ] CHK006 - Does the spec define whether dropping a procedure automatically unregisters it from all active sessions/caches? [Coverage, Gap]
- [ ] CHK007 - Are the specific standard error codes or error messages defined for the "object not found" case? [Clarity, Spec §3.5]
- [ ] CHK008 - Is the fallback behavior (ignoring the error) for `IF EXISTS` explicitly defined in terms of system state changes? [Consistency, Spec §3.6]

## Edge Cases and Dependencies
- [ ] CHK009 - Are the requirements for dropping a procedure that is currently executing or in use defined? [Edge Case, Gap]
- [ ] CHK010 - Is the behavior specified for dropping a procedure that has identical names across different schemas, if schema qualification is omitted? [Edge Case, Gap]
- [ ] CHK011 - Does the spec explicitly state that dependency tracking is unsupported, meaning cascading drops or restricting drops due to dependencies (like views) is not required? [Coverage, Spec §6.1]

## Measurability and Acceptance
- [ ] CHK012 - Can the success of a procedure deletion be objectively verified using existing system catalog views or `SHOW` commands? [Measurability, Gap]
- [ ] CHK013 - Are the integration test scenarios specified in enough detail (e.g., specific SQL statements) to serve as an executable contract? [Clarity, Spec §4.3]