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69 lines
2.6 KiB
C++
69 lines
2.6 KiB
C++
#include <Parsers/ASTInsertQuery.h>
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#include <Interpreters/Context.h>
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#include <Interpreters/InterpreterSetQuery.h>
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#include <IO/ConcatReadBuffer.h>
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#include <IO/ReadBufferFromMemory.h>
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#include <DataStreams/BlockIO.h>
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#include <DataStreams/InputStreamFromASTInsertQuery.h>
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#include <DataStreams/AddingDefaultsBlockInputStream.h>
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#include <Storages/ColumnsDescription.h>
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#include <Storages/IStorage.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 LOGICAL_ERROR;
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extern const int INVALID_USAGE_OF_INPUT;
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}
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InputStreamFromASTInsertQuery::InputStreamFromASTInsertQuery(
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const ASTPtr & ast, ReadBuffer * input_buffer_tail_part, const Block & header, const Context & context, const ASTPtr & input_function)
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{
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const auto * ast_insert_query = ast->as<ASTInsertQuery>();
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if (!ast_insert_query)
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throw Exception("Logical error: query requires data to insert, but it is not INSERT query", ErrorCodes::LOGICAL_ERROR);
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String format = ast_insert_query->format;
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if (format.empty())
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{
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if (input_function)
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throw Exception("FORMAT must be specified for function input()", ErrorCodes::INVALID_USAGE_OF_INPUT);
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format = "Values";
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}
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/// Data could be in parsed (ast_insert_query.data) and in not parsed yet (input_buffer_tail_part) part of query.
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input_buffer_ast_part = std::make_unique<ReadBufferFromMemory>(
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ast_insert_query->data, ast_insert_query->data ? ast_insert_query->end - ast_insert_query->data : 0);
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ConcatReadBuffer::ReadBuffers buffers;
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if (ast_insert_query->data)
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buffers.push_back(input_buffer_ast_part.get());
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if (input_buffer_tail_part)
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buffers.push_back(input_buffer_tail_part);
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/** NOTE Must not read from 'input_buffer_tail_part' before read all between 'ast_insert_query.data' and 'ast_insert_query.end'.
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* - because 'query.data' could refer to memory piece, used as buffer for 'input_buffer_tail_part'.
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*/
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input_buffer_contacenated = std::make_unique<ConcatReadBuffer>(buffers);
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res_stream = context.getInputFormat(format, *input_buffer_contacenated, header, context.getSettings().max_insert_block_size);
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if (context.getSettingsRef().input_format_defaults_for_omitted_fields && ast_insert_query->table_id && !input_function)
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{
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StoragePtr storage = DatabaseCatalog::instance().getTable(ast_insert_query->table_id);
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auto column_defaults = storage->getColumns().getDefaults();
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if (!column_defaults.empty())
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res_stream = std::make_shared<AddingDefaultsBlockInputStream>(res_stream, column_defaults, context);
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}
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}
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}
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