# Plan 44-01 Summary

**Status:** Complete
**Phase:** 44-show-describe-metadata-surface-enhancements
**Plan:** 01

## What was built

Surfaced Phase 43 metadata annotations (COMMENT, SYNONYMS, PRIVATE/PUBLIC) through SHOW and DESCRIBE introspection commands.

### Task 1: SHOW metadata columns
- SHOW SEMANTIC DIMENSIONS/METRICS/FACTS: 6→8 columns (added `synonyms` and `comment`)
- SHOW SEMANTIC VIEWS: 5→6 columns (added `comment`)
- Promoted `format_json_array` to `pub(crate)` for cross-module use
- Updated all existing sqllogictest files (phase32, phase34, phase39, phase42) for new column counts
- Created `phase44_show_metadata.test` with 6 test cases

### Task 2: DESCRIBE metadata properties
- View-level COMMENT emitted as empty object_kind/object_name row
- TABLE COMMENT and SYNONYMS property rows after PRIMARY_KEY
- DIMENSION COMMENT and SYNONYMS property rows after DATA_TYPE
- FACT/METRIC/DERIVED_METRIC: COMMENT, SYNONYMS, ACCESS_MODIFIER rows after DATA_TYPE
- ACCESS_MODIFIER always emitted for facts and metrics (PUBLIC or PRIVATE)
- COMMENT and SYNONYMS omitted when values are empty/None
- Updated all existing DESCRIBE test expected outputs (10 files)
- Created `phase44_describe_metadata.test` with 7 test cases

## Key files

### Created
- `test/sql/phase44_show_metadata.test`
- `test/sql/phase44_describe_metadata.test`

### Modified
- `src/ddl/list.rs` — added comment column (5→6)
- `src/ddl/show_dims.rs` — added synonyms+comment (6→8)
- `src/ddl/show_metrics.rs` — added synonyms+comment (6→8)
- `src/ddl/show_facts.rs` — added synonyms+comment (6→8)
- `src/ddl/describe.rs` — pub(crate) format_json_array, COMMENT/SYNONYMS/ACCESS_MODIFIER rows

## Deviations

None. All requirements delivered as planned.

## Self-Check: PASSED
- `cargo test` — all unit tests pass
- `just build && just test-sql` — all 22 sqllogictest files pass
