759f1da32e
1. Add `HostName` field for `show backends` statement and `backends()` tvf. 2. delete the `backends` table in `information_schema` database
114 lines
3.7 KiB
C++
114 lines
3.7 KiB
C++
// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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#pragma once
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#include <string>
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#include "common/object_pool.h"
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#include "common/status.h"
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#include "gen_cpp/Descriptors_types.h"
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#include "gen_cpp/Types_types.h"
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#include "util/runtime_profile.h"
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#include "vec/core/block.h"
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namespace doris {
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// forehead declare class, because jni function init in DorisServer.
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class DorisServer;
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class RuntimeState;
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namespace vectorized {
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class Block;
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}
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// scanner parameter from frontend
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struct SchemaScannerParam {
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const std::string* db;
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const std::string* table;
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const std::string* wild;
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const std::string* user; // deprecated
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const std::string* user_ip; // deprecated
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const TUserIdentity* current_user_ident; // to replace the user and user ip
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const std::string* ip; // frontend ip
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int32_t port; // frontend thrift port
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int64_t thread_id;
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const std::string* catalog;
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std::unique_ptr<RuntimeProfile> profile;
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SchemaScannerParam()
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: db(nullptr),
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table(nullptr),
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wild(nullptr),
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user(nullptr),
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user_ip(nullptr),
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current_user_ident(nullptr),
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ip(nullptr),
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port(0),
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catalog(nullptr) {}
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};
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// virtual scanner for all schema table
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class SchemaScanner {
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public:
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struct ColumnDesc {
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const char* name;
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PrimitiveType type;
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int size;
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bool is_null;
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/// Only set if type == TYPE_DECIMAL or DATETIMEV2
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int precision = -1;
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int scale = -1;
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};
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SchemaScanner(const std::vector<ColumnDesc>& columns);
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SchemaScanner(const std::vector<ColumnDesc>& columns, TSchemaTableType::type type);
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virtual ~SchemaScanner();
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// init object need information, schema etc.
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virtual Status init(SchemaScannerParam* param, ObjectPool* pool);
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// Start to work
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virtual Status start(RuntimeState* state);
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virtual Status get_next_block(vectorized::Block* block, bool* eos);
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const std::vector<ColumnDesc>& get_column_desc() const { return _columns; }
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// factory function
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static SchemaScanner* create(TSchemaTableType::type type);
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TSchemaTableType::type type() const { return _schema_table_type; }
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static void set_doris_server(DorisServer* doris_server) { _s_doris_server = doris_server; }
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protected:
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Status fill_dest_column_for_range(vectorized::Block* block, size_t pos,
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const std::vector<void*>& datas);
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bool _is_init;
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// this is used for sub class
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SchemaScannerParam* _param;
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// schema table's column desc
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std::vector<ColumnDesc> _columns;
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static DorisServer* _s_doris_server;
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TSchemaTableType::type _schema_table_type;
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RuntimeProfile::Counter* _get_db_timer = nullptr;
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RuntimeProfile::Counter* _get_table_timer = nullptr;
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RuntimeProfile::Counter* _get_describe_timer = nullptr;
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RuntimeProfile::Counter* _fill_block_timer = nullptr;
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};
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} // namespace doris
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