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[Feature] Stream load support JSON to STRUCT/MAP/ARRAY (#45406)
Signed-off-by: ricky <rickif@qq.com> Co-authored-by: wyb <wybb86@gmail.com> (cherry picked from commit a4f53d3)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,66 @@ | ||
| // Copyright 2021-present StarRocks, Inc. All rights reserved. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // https://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
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| #include "column/map_column.h" | ||
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| #include "fmt/format.h" | ||
| #include "formats/json/map_column.h" | ||
| #include "formats/json/nullable_column.h" | ||
| #include "gutil/strings/substitute.h" | ||
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| namespace starrocks { | ||
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| Status add_map_column(Column* column, const TypeDescriptor& type_desc, const std::string& name, | ||
| simdjson::ondemand::value* value) { | ||
| auto map_column = down_cast<MapColumn*>(column); | ||
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| try { | ||
| if (value->type() != simdjson::ondemand::json_type::object) { | ||
| std::ostringstream ss; | ||
| ss << "Expected value type [object], got [" << value->type() << "]"; | ||
| return Status::DataQualityError(ss.str()); | ||
| } | ||
| simdjson::ondemand::object obj = value->get_object(); | ||
| simdjson::ondemand::parser parser; | ||
| size_t field_count = 0; | ||
| for (auto field : obj) { | ||
| { | ||
| // This is a tricky way to transform a std::string to simdjson:ondemand:value | ||
| std::string_view field_name_str = field.unescaped_key(); | ||
| auto dummy_json = simdjson::padded_string(R"({"dummy_key": ")" + std::string(field_name_str) + R"("})"); | ||
| simdjson::ondemand::document doc = parser.iterate(dummy_json); | ||
| simdjson::ondemand::object obj = doc.get_object(); | ||
| simdjson::ondemand::value field_key = obj.find_field("dummy_key"); | ||
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| RETURN_IF_ERROR(add_nullable_column(map_column->keys_column().get(), type_desc.children[0], name, | ||
| &field_key, true)); | ||
| } | ||
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| { | ||
| simdjson::ondemand::value field_value = field.value(); | ||
| RETURN_IF_ERROR(add_nullable_column(map_column->values_column().get(), type_desc.children[1], name, | ||
| &field_value, true)); | ||
| } | ||
| ++field_count; | ||
| } | ||
| map_column->offsets_column()->append(map_column->offsets_column()->get_data().back() + field_count); | ||
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| return Status::OK(); | ||
| } catch (simdjson::simdjson_error& e) { | ||
| auto err_msg = strings::Substitute("Failed to parse value as object, column=$0, error=$1", name, | ||
| simdjson::error_message(e.error())); | ||
| return Status::DataQualityError(err_msg); | ||
| } | ||
| } | ||
| } // namespace starrocks |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,27 @@ | ||
| // Copyright 2021-present StarRocks, Inc. All rights reserved. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // https://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
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| #pragma once | ||
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| #include <string> | ||
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| #include "column/column.h" | ||
| #include "common/status.h" | ||
| #include "runtime/types.h" | ||
| #include "simdjson.h" | ||
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| namespace starrocks { | ||
| Status add_map_column(Column* column, const TypeDescriptor& type_desc, const std::string& name, | ||
| simdjson::ondemand::value* value); | ||
| } // namespace starrocks |
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