1 | #pragma once |
2 | |
3 | #include <Databases/IDatabase.h> |
4 | #include <Interpreters/IInterpreter.h> |
5 | #include <Parsers/ASTDropQuery.h> |
6 | #include <Parsers/IAST_fwd.h> |
7 | |
8 | |
9 | namespace DB |
10 | { |
11 | class Context; |
12 | using DatabaseAndTable = std::pair<DatabasePtr, StoragePtr>; |
13 | |
14 | /** Allow to either drop table with all its data (DROP), |
15 | * or remove information about table (just forget) from server (DETACH), |
16 | * or just clear all data in table (TRUNCATE). |
17 | */ |
18 | class InterpreterDropQuery : public IInterpreter |
19 | { |
20 | public: |
21 | InterpreterDropQuery(const ASTPtr & query_ptr_, Context & context_); |
22 | |
23 | /// Drop table or database. |
24 | BlockIO execute() override; |
25 | |
26 | private: |
27 | void checkAccess(const ASTDropQuery & drop); |
28 | ASTPtr query_ptr; |
29 | Context & context; |
30 | |
31 | BlockIO executeToDatabase(String & database_name, ASTDropQuery::Kind kind, bool if_exists); |
32 | |
33 | BlockIO executeToTable(String & database_name, String & table_name, ASTDropQuery::Kind kind, bool if_exists, bool if_temporary, bool no_ddl_lock); |
34 | |
35 | BlockIO executeToDictionary(String & database_name, String & table_name, ASTDropQuery::Kind kind, bool if_exists, bool if_temporary, bool no_ddl_lock); |
36 | |
37 | DatabasePtr tryGetDatabase(String & database_name, bool exists); |
38 | |
39 | DatabaseAndTable tryGetDatabaseAndTable(String & database_name, String & table_name, bool if_exists); |
40 | |
41 | BlockIO executeToTemporaryTable(String & table_name, ASTDropQuery::Kind kind); |
42 | }; |
43 | } |
44 | |