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50 lines
1.3 KiB
C++
50 lines
1.3 KiB
C++
#include <Interpreters/InterpreterSelectQuery.h>
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#include <Parsers/ASTIdentifier.h>
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#include <Parsers/ASTCreateQuery.h>
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#include <Parsers/ASTSelectQuery.h>
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#include <Common/typeid_cast.h>
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#include <Storages/StorageView.h>
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int INCORRECT_QUERY;
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}
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StorageView::StorageView(
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const String & table_name_,
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const String & database_name_,
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const ASTCreateQuery & query,
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NamesAndTypesListPtr columns_,
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const NamesAndTypesList & materialized_columns_,
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const NamesAndTypesList & alias_columns_,
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const ColumnDefaults & column_defaults_)
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: IStorage{materialized_columns_, alias_columns_, column_defaults_}, table_name(table_name_),
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database_name(database_name_), columns(columns_)
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{
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if (!query.select)
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throw Exception("SELECT query is not specified for " + getName(), ErrorCodes::INCORRECT_QUERY);
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inner_query = query.select->ptr();
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}
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BlockInputStreams StorageView::read(
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const Names & column_names,
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const SelectQueryInfo & query_info,
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const Context & context,
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QueryProcessingStage::Enum & processed_stage,
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const size_t max_block_size,
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const unsigned num_streams)
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{
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processed_stage = QueryProcessingStage::FetchColumns;
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return InterpreterSelectQuery(inner_query->clone(), context, column_names).executeWithoutUnion();
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}
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}
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