```sql select 1 ``` ```json { "steps": [ { "join_preparation": { "select#": 1, "steps": [ { "expanded_query": "/* select#1 */ select 1 AS `1`" } ] } }, { "join_optimization": { "select#": 1, "steps": [ ] } }, { "join_explain": { "select#": 1, "steps": [ ] } } ] } ```