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Merge pull request #1207 from finos/csv-arrow
Upgrade WebAssembly build to Arrow 1.0.1
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,60 @@ | ||
| /****************************************************************************** | ||
| * | ||
| * Copyright (c) 2019, the Perspective Authors. | ||
| * | ||
| * This file is part of the Perspective library, distributed under the terms of | ||
| * the Apache License 2.0. The full license can be found in the LICENSE file. | ||
| * | ||
| */ | ||
|
|
||
| #include <perspective/base.h> | ||
| #include <perspective/arrow_csv.h> | ||
| #include <arrow/util/value_parsing.h> | ||
| #include <arrow/io/memory.h> | ||
|
|
||
| // This causes build warnings | ||
| // https://github.com/emscripten-core/emscripten/issues/8574 | ||
| #include <perspective/vendor/arrow_single_threaded_reader.h> | ||
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|
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| namespace perspective { | ||
| namespace apachearrow { | ||
|
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| std::shared_ptr<::arrow::Table> | ||
| csvToTable(std::string& csv, bool is_update, | ||
| std::unordered_map<std::string, std::shared_ptr<arrow::DataType>>& | ||
| schema) { | ||
| arrow::MemoryPool* pool = arrow::default_memory_pool(); | ||
| auto input = std::make_shared<arrow::io::BufferReader>(csv); | ||
| auto read_options = arrow::csv::ReadOptions::Defaults(); | ||
| auto parse_options = arrow::csv::ParseOptions::Defaults(); | ||
| auto convert_options = arrow::csv::ConvertOptions::Defaults(); | ||
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| read_options.use_threads = false; | ||
| convert_options.timestamp_parsers | ||
| = std::vector<std::shared_ptr<arrow::TimestampParser>>{ | ||
| arrow::TimestampParser::MakeISO8601(), | ||
| arrow::TimestampParser::MakeStrptime("%Y-%m-%d\\D%H:%M:%S.%f"), | ||
| arrow::TimestampParser::MakeStrptime("%m-%d-%Y"), | ||
| arrow::TimestampParser::MakeStrptime("%m/%d/%Y"), | ||
| arrow::TimestampParser::MakeStrptime("%d %m %Y"), | ||
| arrow::TimestampParser::MakeStrptime("%H:%M:%S.%f"), | ||
| }; | ||
|
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| if (is_update) { | ||
| convert_options.column_types = std::move(schema); | ||
| } | ||
|
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| auto maybe_reader = arrow::csv::TableReader::Make( | ||
| pool, input, read_options, parse_options, convert_options); | ||
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| std::shared_ptr<arrow::csv::TableReader> reader = *maybe_reader; | ||
|
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| auto maybe_table = reader->Read(); | ||
| if (!maybe_table.ok()) { | ||
| PSP_COMPLAIN_AND_ABORT(maybe_table.status().ToString()); | ||
| } | ||
| return *maybe_table; | ||
| } | ||
|
|
||
| } // namespace apachearrow | ||
| } // namespace perspective |
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