124 lines
4.7 KiB
C++
124 lines
4.7 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 <gen_cpp/Descriptors_types.h>
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#include <parallel_hashmap/phmap.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <map>
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#include <mutex>
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#include <string>
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#include "common/status.h"
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#include "olap/tablet_schema.h"
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#include "udf/udf.h"
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#include "vec/aggregate_functions/aggregate_function.h"
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#include "vec/core/columns_with_type_and_name.h"
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#include "vec/core/field.h"
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#include "vec/data_types/data_type.h"
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namespace doris {
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class LocalSchemaChangeRecorder;
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enum class FieldType;
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namespace vectorized {
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class Block;
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class IColumn;
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struct ColumnWithTypeAndName;
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} // namespace vectorized
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} // namespace doris
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namespace doris::vectorized::schema_util {
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/// Returns number of dimensions in Array type. 0 if type is not array.
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size_t get_number_of_dimensions(const IDataType& type);
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/// Returns number of dimensions in Array column. 0 if column is not array.
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size_t get_number_of_dimensions(const IColumn& column);
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/// Returns type of scalars of Array of arbitrary dimensions.
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DataTypePtr get_base_type_of_array(const DataTypePtr& type);
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/// Returns Array with requested number of dimensions and no scalars.
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Array create_empty_array_field(size_t num_dimensions);
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// Cast column to dst type
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Status cast_column(const ColumnWithTypeAndName& arg, const DataTypePtr& type, ColumnPtr* result,
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RuntimeState* = nullptr);
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// Object column will be unfolded and if cast_to_original_type
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// the original column in the block will be replaced with the subcolumn
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// from object column and casted to the new type from slot_descs.
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// Also if column in block is empty, it will be filled
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// with num_rows of default values
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Status unfold_object(size_t dynamic_col_position, Block& block, bool cast_to_original_type,
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RuntimeState* = nullptr);
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/// If both of types are signed/unsigned integers and size of left field type
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/// is less than right type, we don't need to convert field,
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/// because all integer fields are stored in Int64/UInt64.
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bool is_conversion_required_between_integers(const IDataType& lhs, const IDataType& rhs);
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bool is_conversion_required_between_integers(FieldType lhs, FieldType rhs);
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// Align block schema with tablet schema
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// eg.
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// Block: col1(int), col2(string)
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// Schema: col1(double), col3(date)
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// 1. col1(int) in block which type missmatch with schema col1 will be converted to double
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// 2. col2 in block which missing in current schema will launch a schema change rpc
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// 3. col3 in schema which missing in block will be ignored
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// After schema changed, schame change history will add new columns
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Status align_block_with_schema(const TabletSchema& schema, int64_t table_id /*for schema change*/,
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Block& block, LocalSchemaChangeRecorder* history);
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// record base schema column infos
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// maybe use col_unique_id as key in the future
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// but for dynamic table, column name if ok
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struct FullBaseSchemaView {
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ENABLE_FACTORY_CREATOR(FullBaseSchemaView);
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phmap::flat_hash_map<std::string, TColumn> column_name_to_column;
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int32_t schema_version = -1;
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int32_t table_id = 0;
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std::string table_name;
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std::string db_name;
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bool empty() { return column_name_to_column.empty() && schema_version == -1; }
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};
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Status send_add_columns_rpc(ColumnsWithTypeAndName column_type_names,
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FullBaseSchemaView* schema_view);
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Status send_fetch_full_base_schema_view_rpc(FullBaseSchemaView* schema_view);
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// For tracking local schema change during load procedure
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class LocalSchemaChangeRecorder {
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public:
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void add_extended_columns(const TabletColumn& new_column, int32_t schema_version);
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bool has_extended_columns();
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std::map<std::string, TabletColumn> copy_extended_columns();
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const TabletColumn& column(const std::string& col_name);
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int32_t schema_version();
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private:
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std::mutex _lock;
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int32_t _schema_version = -1;
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std::map<std::string, TabletColumn> _extended_columns;
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};
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} // namespace doris::vectorized::schema_util
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