explain: typing-surface matrix cells (ADR-0028 step 5)

13 matrix cells for the `explain` prefix across all three
wrapped commands — `explain show data` / `explain update` /
`explain delete` — covering each typing position (after the
prefix, the inner entry word, the table, the filter clause)
plus the three complete forms. The cells confirm `explain`
plugs into the inner query grammars cleanly: candidates, hints
and column scoping match the standalone commands, and the
complete forms parse as `Command::Explain`.

Also adds a worker test pinning the display SQL's `<>`
rendering of inequality (ADR-0028 §3).

Matrix: 161 -> 174 cells. 1172 tests pass; clippy clean.

This commit is contained in:

claude@clouddev1

2026-05-19 12:49:58 +00:00

parent a7d459f8f2

commit ae99276283

16 changed files with 678 additions and 0 deletions

									
										tests/typing_surface/mod.rs
									
		+1
		
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				@@ -29,6 +29,7 @@ pub mod update_all_rows;

				pub mod delete_with_where;

				pub mod where_expression;

				pub mod delete_all_rows;

				pub mod explain;

				pub mod create_table;

				pub mod drop_column;

				pub mod drop_relationship;