| 73 | String getID(char delim) const override { return "Explain" + (delim + toString(kind)); } |
| 74 | ExplainKind getKind() const { return kind; } |
| 75 | ASTPtr clone() const override |
| 76 | { |
| 77 | auto res = make_intrusive<ASTExplainQuery>(*this); |
| 78 | |
| 79 | /// Re-add the named children explicitly, in the same order `ParserExplainQuery` |
| 80 | /// produces them, so that the clone has the same `getTreeHash` as a freshly parsed |
| 81 | /// AST. The parser parses the EXPLAIN-level settings before the explained query |
| 82 | /// (e.g. `EXPLAIN header = 1 SELECT 1` is parsed as `children = [ast_settings, query]`), |
| 83 | /// so `ast_settings` must come before `query`. |
| 84 | res->children.clear(); |
| 85 | res->query = nullptr; |
| 86 | res->ast_settings = nullptr; |
| 87 | res->table_function = nullptr; |
| 88 | res->table_override = nullptr; |
| 89 | |
| 90 | if (ast_settings) |
| 91 | res->setSettings(ast_settings->clone()); |
| 92 | if (query) |
| 93 | res->setExplainedQuery(query->clone()); |
| 94 | if (table_function) |
| 95 | res->setTableFunction(table_function->clone()); |
| 96 | if (table_override) |
| 97 | res->setTableOverride(table_override->clone()); |
| 98 | |
| 99 | cloneOutputOptions(*res); |
| 100 | return res; |
| 101 | } |
| 102 | |
| 103 | void setExplainKind(ExplainKind kind_) { kind = kind_; } |
| 104 |
nothing calls this directly
no test coverage detected