/Users/deen/code/yugabyte-db/src/yb/master/system_tablet.h
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1 | | // Copyright (c) YugaByte, Inc. |
2 | | // |
3 | | // Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except |
4 | | // in compliance with the License. You may obtain a copy of the License at |
5 | | // |
6 | | // http://www.apache.org/licenses/LICENSE-2.0 |
7 | | // |
8 | | // Unless required by applicable law or agreed to in writing, software distributed under the License |
9 | | // is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express |
10 | | // or implied. See the License for the specific language governing permissions and limitations |
11 | | // under the License. |
12 | | // |
13 | | |
14 | | #ifndef YB_MASTER_SYSTEM_TABLET_H |
15 | | #define YB_MASTER_SYSTEM_TABLET_H |
16 | | |
17 | | #include "yb/common/hybrid_time.h" |
18 | | |
19 | | #include "yb/master/master_fwd.h" |
20 | | |
21 | | #include "yb/tablet/abstract_tablet.h" |
22 | | |
23 | | namespace yb { |
24 | | namespace master { |
25 | | |
26 | | // This is a virtual tablet that is used for our virtual tables in the system namespace. |
27 | | class SystemTablet : public tablet::AbstractTablet { |
28 | | public: |
29 | | SystemTablet(const Schema& schema, std::unique_ptr<YQLVirtualTable> yql_virtual_table, |
30 | | const TabletId& tablet_id); |
31 | | |
32 | | yb::SchemaPtr GetSchema(const std::string& table_id = "") const override; |
33 | | |
34 | | const docdb::YQLStorageIf& QLStorage() const override; |
35 | | |
36 | | TableType table_type() const override; |
37 | | |
38 | | const TabletId& tablet_id() const override; |
39 | | |
40 | 260k | bool system() const override { |
41 | 260k | return true; |
42 | 260k | } |
43 | | |
44 | 519k | tablet::TabletRetentionPolicy* RetentionPolicy() override { |
45 | 519k | return nullptr; |
46 | 519k | } |
47 | | |
48 | | CHECKED_STATUS HandleRedisReadRequest(CoarseTimePoint deadline, |
49 | | const ReadHybridTime& read_time, |
50 | | const RedisReadRequestPB& redis_read_request, |
51 | 0 | RedisResponsePB* response) override { |
52 | 0 | return STATUS(NotSupported, "RedisReadRequest is not supported for system tablets!"); |
53 | 0 | } Unexecuted instantiation: _ZN2yb6master12SystemTablet22HandleRedisReadRequestENSt3__16chrono10time_pointINS_15CoarseMonoClockENS3_8durationIxNS2_5ratioILl1ELl1000000000EEEEEEERKNS_14ReadHybridTimeERKNS_18RedisReadRequestPBEPNS_15RedisResponsePBE Unexecuted instantiation: _ZN2yb6master12SystemTablet22HandleRedisReadRequestENSt3__16chrono10time_pointINS_15CoarseMonoClockENS3_8durationIxNS2_5ratioILl1ELl1000000000EEEEEEERKNS_14ReadHybridTimeERKNS_18RedisReadRequestPBEPNS_15RedisResponsePBE |
54 | | |
55 | | CHECKED_STATUS HandleQLReadRequest(CoarseTimePoint deadline, |
56 | | const ReadHybridTime& read_time, |
57 | | const QLReadRequestPB& ql_read_request, |
58 | | const TransactionMetadataPB& transaction_metadata, |
59 | | tablet::QLReadRequestResult* result) override; |
60 | | |
61 | | CHECKED_STATUS CreatePagingStateForRead(const QLReadRequestPB& ql_read_request, |
62 | | const size_t row_count, |
63 | | QLResponsePB* response) const override; |
64 | | |
65 | | CHECKED_STATUS HandlePgsqlReadRequest(CoarseTimePoint deadline, |
66 | | const ReadHybridTime& read_time, |
67 | | bool is_explicit_request_read_time, |
68 | | const PgsqlReadRequestPB& pgsql_read_request, |
69 | | const TransactionMetadataPB& transaction_metadata, |
70 | | const SubTransactionMetadataPB& subtransaction_metadata, |
71 | | tablet::PgsqlReadRequestResult* result, |
72 | 0 | size_t* num_rows_read) override { |
73 | 0 | return STATUS(NotSupported, "Postgres system table is not yet supported"); |
74 | 0 | } Unexecuted instantiation: _ZN2yb6master12SystemTablet22HandlePgsqlReadRequestENSt3__16chrono10time_pointINS_15CoarseMonoClockENS3_8durationIxNS2_5ratioILl1ELl1000000000EEEEEEERKNS_14ReadHybridTimeEbRKNS_18PgsqlReadRequestPBERKNS_21TransactionMetadataPBERKNS_24SubTransactionMetadataPBEPNS_6tablet22PgsqlReadRequestResultEPm Unexecuted instantiation: _ZN2yb6master12SystemTablet22HandlePgsqlReadRequestENSt3__16chrono10time_pointINS_15CoarseMonoClockENS3_8durationIxNS2_5ratioILl1ELl1000000000EEEEEEERKNS_14ReadHybridTimeEbRKNS_18PgsqlReadRequestPBERKNS_21TransactionMetadataPBERKNS_24SubTransactionMetadataPBEPNS_6tablet22PgsqlReadRequestResultEPm |
75 | | |
76 | | CHECKED_STATUS CreatePagingStateForRead(const PgsqlReadRequestPB& pgsql_read_request, |
77 | | const size_t row_count, |
78 | 0 | PgsqlResponsePB* response) const override { |
79 | 0 | return STATUS(NotSupported, "Postgres system table is not yet supported"); |
80 | 0 | } Unexecuted instantiation: _ZNK2yb6master12SystemTablet24CreatePagingStateForReadERKNS_18PgsqlReadRequestPBEmPNS_15PgsqlResponsePBE Unexecuted instantiation: _ZNK2yb6master12SystemTablet24CreatePagingStateForReadERKNS_18PgsqlReadRequestPBEmPNS_15PgsqlResponsePBE |
81 | | |
82 | | const TableName& GetTableName() const; |
83 | | |
84 | 0 | Result<IsolationLevel> GetIsolationLevel(const TransactionMetadataPB& transaction) override { |
85 | 0 | return IsolationLevel::NON_TRANSACTIONAL; |
86 | 0 | } |
87 | | |
88 | | // Decides whether the given request should go through the distributed transaction framework |
89 | | // based on internal properties of the tablet and whether it is a YSQL request (is_ysql_request). |
90 | 520k | bool IsTransactionalRequest(bool is_ysql_request) const override { return false; } |
91 | | |
92 | | private: |
93 | | Result<HybridTime> DoGetSafeTime( |
94 | | tablet::RequireLease require_lease, HybridTime min_allowed, |
95 | | CoarseTimePoint deadline) const override; |
96 | | |
97 | | yb::SchemaPtr schema_; |
98 | | std::unique_ptr<YQLVirtualTable> yql_virtual_table_; |
99 | | TabletId tablet_id_; |
100 | | }; |
101 | | |
102 | | } // namespace master |
103 | | } // namespace yb |
104 | | #endif // YB_MASTER_SYSTEM_TABLET_H |