mirror of
https://github.com/ClickHouse/ClickHouse.git
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1128 lines
40 KiB
C++
1128 lines
40 KiB
C++
#pragma once
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#include <Functions/IFunctionImpl.h>
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#include <Core/AccurateComparison.h>
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#include <Functions/DummyJSONParser.h>
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#include <Functions/SimdJSONParser.h>
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#include <Functions/RapidJSONParser.h>
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#include "config_functions.h"
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#include <Common/CpuId.h>
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#include <Common/typeid_cast.h>
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#include <Common/assert_cast.h>
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#include <Core/Settings.h>
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#include <Columns/ColumnConst.h>
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#include <Columns/ColumnString.h>
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#include <Columns/ColumnVector.h>
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#include <Columns/ColumnFixedString.h>
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#include <Columns/ColumnNullable.h>
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#include <Columns/ColumnArray.h>
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#include <Columns/ColumnTuple.h>
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#include <DataTypes/DataTypesNumber.h>
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#include <DataTypes/DataTypeString.h>
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#include <DataTypes/DataTypeEnum.h>
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#include <DataTypes/DataTypeFactory.h>
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#include <DataTypes/DataTypeNullable.h>
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#include <DataTypes/DataTypeArray.h>
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#include <DataTypes/DataTypeTuple.h>
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#include <Interpreters/Context.h>
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#include <ext/range.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 ILLEGAL_COLUMN;
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extern const int ILLEGAL_TYPE_OF_ARGUMENT;
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extern const int NUMBER_OF_ARGUMENTS_DOESNT_MATCH;
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}
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/// Functions to parse JSONs and extract values from it.
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/// The first argument of all these functions gets a JSON,
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/// after that there are any number of arguments specifying path to a desired part from the JSON's root.
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/// For example,
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/// select JSONExtractInt('{"a": "hello", "b": [-100, 200.0, 300]}', 'b', 1) = -100
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template <typename Name, template<typename> typename Impl>
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class FunctionJSON : public IFunction
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{
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public:
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static FunctionPtr create(const Context & context_) { return std::make_shared<FunctionJSON>(context_); }
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FunctionJSON(const Context & context_) : context(context_) {}
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static constexpr auto name = Name::name;
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String getName() const override { return Name::name; }
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bool isVariadic() const override { return true; }
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size_t getNumberOfArguments() const override { return 0; }
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bool useDefaultImplementationForConstants() const override { return false; }
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DataTypePtr getReturnTypeImpl(const ColumnsWithTypeAndName & arguments) const override
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{
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return Impl<DummyJSONParser>::getType(Name::name, arguments);
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}
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void executeImpl(Block & block, const ColumnNumbers & arguments, size_t result_pos, size_t input_rows_count) override
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{
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/// Choose JSONParser.
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#if USE_SIMDJSON
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if (context.getSettingsRef().allow_simdjson && Cpu::CpuFlagsCache::have_SSE42 && Cpu::CpuFlagsCache::have_PCLMUL)
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{
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Executor<SimdJSONParser>::run(block, arguments, result_pos, input_rows_count);
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return;
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}
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#endif
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#if USE_RAPIDJSON
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Executor<RapidJSONParser>::run(block, arguments, result_pos, input_rows_count);
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#else
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Executor<DummyJSONParser>::run(block, arguments, result_pos, input_rows_count);
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#endif
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}
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private:
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const Context & context;
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template <typename JSONParser>
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class Executor
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{
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public:
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static void run(Block & block, const ColumnNumbers & arguments, size_t result_pos, size_t input_rows_count)
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{
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MutableColumnPtr to{block.getByPosition(result_pos).type->createColumn()};
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to->reserve(input_rows_count);
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if (arguments.size() < 1)
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throw Exception{"Function " + String(Name::name) + " requires at least one argument", ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH};
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const auto & first_column = block.getByPosition(arguments[0]);
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if (!isString(first_column.type))
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throw Exception{"The first argument of function " + String(Name::name) + " should be a string containing JSON, illegal type: " + first_column.type->getName(),
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ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT};
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const ColumnPtr & arg_json = first_column.column;
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auto col_json_const = typeid_cast<const ColumnConst *>(arg_json.get());
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auto col_json_string
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= typeid_cast<const ColumnString *>(col_json_const ? col_json_const->getDataColumnPtr().get() : arg_json.get());
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if (!col_json_string)
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throw Exception{"Illegal column " + arg_json->getName(), ErrorCodes::ILLEGAL_COLUMN};
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const ColumnString::Chars & chars = col_json_string->getChars();
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const ColumnString::Offsets & offsets = col_json_string->getOffsets();
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std::vector<Move> moves = prepareListOfMoves(block, arguments);
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/// Preallocate memory in parser if necessary.
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JSONParser parser;
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if (parser.need_preallocate)
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parser.preallocate(calculateMaxSize(offsets));
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Impl<JSONParser> impl;
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/// prepare() does Impl-specific preparation before handling each row.
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impl.prepare(Name::name, block, arguments, result_pos);
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bool json_parsed_ok = false;
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if (col_json_const)
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{
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StringRef json{reinterpret_cast<const char *>(&chars[0]), offsets[0] - 1};
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json_parsed_ok = parser.parse(json);
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}
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for (const auto i : ext::range(0, input_rows_count))
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{
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if (!col_json_const)
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{
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StringRef json{reinterpret_cast<const char *>(&chars[offsets[i - 1]]), offsets[i] - offsets[i - 1] - 1};
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json_parsed_ok = parser.parse(json);
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}
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bool ok = json_parsed_ok;
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if (ok)
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{
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auto it = parser.getRoot();
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/// Perform moves.
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for (size_t j = 0; (j != moves.size()) && ok; ++j)
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{
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switch (moves[j].type)
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{
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case MoveType::ConstIndex:
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ok = moveIteratorToElementByIndex(it, moves[j].index);
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break;
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case MoveType::ConstKey:
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ok = moveIteratorToElementByKey(it, moves[j].key);
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break;
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case MoveType::Index:
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{
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const Field field = (*block.getByPosition(arguments[j + 1]).column)[i];
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ok = moveIteratorToElementByIndex(it, field.get<Int64>());
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break;
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}
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case MoveType::Key:
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{
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const Field field = (*block.getByPosition(arguments[j + 1]).column)[i];
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ok = moveIteratorToElementByKey(it, field.get<String>().data());
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break;
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}
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}
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}
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if (ok)
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ok = impl.addValueToColumn(*to, it);
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}
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/// We add default value (=null or zero) if something goes wrong, we don't throw exceptions in these JSON functions.
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if (!ok)
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to->insertDefault();
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}
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block.getByPosition(result_pos).column = std::move(to);
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}
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private:
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/// Represents a move of a JSON iterator described by a single argument passed to a JSON function.
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/// For example, the call JSONExtractInt('{"a": "hello", "b": [-100, 200.0, 300]}', 'b', 1)
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/// contains two moves: {MoveType::ConstKey, "b"} and {MoveType::ConstIndex, 1}.
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/// Keys and indices can be nonconst, in this case they are calculated for each row.
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enum class MoveType
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{
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Key,
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Index,
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ConstKey,
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ConstIndex,
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};
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struct Move
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{
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Move(MoveType type_, size_t index_ = 0) : type(type_), index(index_) {}
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Move(MoveType type_, const String & key_) : type(type_), key(key_) {}
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MoveType type;
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size_t index = 0;
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String key;
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};
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static std::vector<Move> prepareListOfMoves(Block & block, const ColumnNumbers & arguments)
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{
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constexpr size_t num_extra_arguments = Impl<JSONParser>::num_extra_arguments;
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const size_t num_moves = arguments.size() - num_extra_arguments - 1;
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std::vector<Move> moves;
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moves.reserve(num_moves);
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for (const auto i : ext::range(0, num_moves))
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{
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const auto & column = block.getByPosition(arguments[i + 1]);
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if (!isString(column.type) && !isInteger(column.type))
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throw Exception{"The argument " + std::to_string(i + 2) + " of function " + String(Name::name)
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+ " should be a string specifying key or an integer specifying index, illegal type: " + column.type->getName(),
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ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT};
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if (isColumnConst(*column.column))
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{
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const auto & column_const = assert_cast<const ColumnConst &>(*column.column);
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if (isString(column.type))
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moves.emplace_back(MoveType::ConstKey, column_const.getField().get<String>());
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else
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moves.emplace_back(MoveType::ConstIndex, column_const.getField().get<Int64>());
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}
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else
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{
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if (isString(column.type))
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moves.emplace_back(MoveType::Key, "");
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else
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moves.emplace_back(MoveType::Index, 0);
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}
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}
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return moves;
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}
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using Iterator = typename JSONParser::Iterator;
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/// Performs moves of types MoveType::Index and MoveType::ConstIndex.
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static bool moveIteratorToElementByIndex(Iterator & it, int index)
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{
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if (JSONParser::isArray(it))
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{
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if (index > 0)
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return JSONParser::arrayElementByIndex(it, index - 1);
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else
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return JSONParser::arrayElementByIndex(it, JSONParser::sizeOfArray(it) + index);
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}
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if (JSONParser::isObject(it))
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{
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if (index > 0)
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return JSONParser::objectMemberByIndex(it, index - 1);
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else
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return JSONParser::objectMemberByIndex(it, JSONParser::sizeOfObject(it) + index);
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}
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return false;
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}
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/// Performs moves of types MoveType::Key and MoveType::ConstKey.
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static bool moveIteratorToElementByKey(Iterator & it, const String & key)
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{
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if (JSONParser::isObject(it))
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return JSONParser::objectMemberByName(it, key);
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return false;
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}
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static size_t calculateMaxSize(const ColumnString::Offsets & offsets)
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{
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size_t max_size = 0;
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for (const auto i : ext::range(0, offsets.size()))
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if (max_size < offsets[i] - offsets[i - 1])
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max_size = offsets[i] - offsets[i - 1];
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if (max_size < 1)
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max_size = 1;
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return max_size;
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}
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};
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};
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struct NameJSONHas { static constexpr auto name{"JSONHas"}; };
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struct NameIsValidJSON { static constexpr auto name{"isValidJSON"}; };
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struct NameJSONLength { static constexpr auto name{"JSONLength"}; };
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struct NameJSONKey { static constexpr auto name{"JSONKey"}; };
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struct NameJSONType { static constexpr auto name{"JSONType"}; };
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struct NameJSONExtractInt { static constexpr auto name{"JSONExtractInt"}; };
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struct NameJSONExtractUInt { static constexpr auto name{"JSONExtractUInt"}; };
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struct NameJSONExtractFloat { static constexpr auto name{"JSONExtractFloat"}; };
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struct NameJSONExtractBool { static constexpr auto name{"JSONExtractBool"}; };
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struct NameJSONExtractString { static constexpr auto name{"JSONExtractString"}; };
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struct NameJSONExtract { static constexpr auto name{"JSONExtract"}; };
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struct NameJSONExtractKeysAndValues { static constexpr auto name{"JSONExtractKeysAndValues"}; };
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struct NameJSONExtractRaw { static constexpr auto name{"JSONExtractRaw"}; };
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struct NameJSONExtractArrayRaw { static constexpr auto name{"JSONExtractArrayRaw"}; };
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template <typename JSONParser>
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class JSONHasImpl
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{
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public:
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static DataTypePtr getType(const char *, const ColumnsWithTypeAndName &) { return std::make_shared<DataTypeUInt8>(); }
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using Iterator = typename JSONParser::Iterator;
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static bool addValueToColumn(IColumn & dest, const Iterator &)
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{
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ColumnVector<UInt8> & col_vec = assert_cast<ColumnVector<UInt8> &>(dest);
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col_vec.insertValue(1);
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return true;
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}
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static constexpr size_t num_extra_arguments = 0;
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static void prepare(const char *, const Block &, const ColumnNumbers &, size_t) {}
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};
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template <typename JSONParser>
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class IsValidJSONImpl
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{
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public:
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static DataTypePtr getType(const char * function_name, const ColumnsWithTypeAndName & arguments)
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{
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if (arguments.size() != 1)
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{
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/// IsValidJSON() shouldn't get parameters other than JSON.
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throw Exception{"Function " + String(function_name) + " needs exactly one argument",
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ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH};
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}
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return std::make_shared<DataTypeUInt8>();
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}
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using Iterator = typename JSONParser::Iterator;
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static bool addValueToColumn(IColumn & dest, const Iterator &)
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{
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/// This function is called only if JSON is valid.
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/// If JSON isn't valid then `FunctionJSON::Executor::run()` adds default value (=zero) to `dest` without calling this function.
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ColumnVector<UInt8> & col_vec = assert_cast<ColumnVector<UInt8> &>(dest);
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col_vec.insertValue(1);
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return true;
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}
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static constexpr size_t num_extra_arguments = 0;
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static void prepare(const char *, const Block &, const ColumnNumbers &, size_t) {}
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};
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template <typename JSONParser>
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class JSONLengthImpl
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{
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public:
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static DataTypePtr getType(const char *, const ColumnsWithTypeAndName &)
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{
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return std::make_shared<DataTypeUInt64>();
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}
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using Iterator = typename JSONParser::Iterator;
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static bool addValueToColumn(IColumn & dest, const Iterator & it)
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{
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size_t size;
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if (JSONParser::isArray(it))
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size = JSONParser::sizeOfArray(it);
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else if (JSONParser::isObject(it))
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size = JSONParser::sizeOfObject(it);
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else
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return false;
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ColumnVector<UInt64> & col_vec = assert_cast<ColumnVector<UInt64> &>(dest);
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col_vec.insertValue(size);
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return true;
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}
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static constexpr size_t num_extra_arguments = 0;
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static void prepare(const char *, const Block &, const ColumnNumbers &, size_t) {}
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};
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template <typename JSONParser>
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class JSONKeyImpl
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{
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public:
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static DataTypePtr getType(const char *, const ColumnsWithTypeAndName &)
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{
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return std::make_shared<DataTypeString>();
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}
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using Iterator = typename JSONParser::Iterator;
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static bool addValueToColumn(IColumn & dest, const Iterator & it)
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{
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if (!JSONParser::isObjectMember(it))
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return false;
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StringRef key = JSONParser::getKey(it);
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ColumnString & col_str = assert_cast<ColumnString &>(dest);
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col_str.insertData(key.data, key.size);
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return true;
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}
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static constexpr size_t num_extra_arguments = 0;
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static void prepare(const char *, const Block &, const ColumnNumbers &, size_t) {}
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};
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template <typename JSONParser>
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class JSONTypeImpl
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{
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public:
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static DataTypePtr getType(const char *, const ColumnsWithTypeAndName &)
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{
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static const std::vector<std::pair<String, Int8>> values = {
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{"Array", '['},
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{"Object", '{'},
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{"String", '"'},
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{"Int64", 'i'},
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{"UInt64", 'u'},
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{"Double", 'd'},
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{"Bool", 'b'},
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{"Null", 0}, /// the default value for the column.
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};
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return std::make_shared<DataTypeEnum<Int8>>(values);
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}
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using Iterator = typename JSONParser::Iterator;
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static bool addValueToColumn(IColumn & dest, const Iterator & it)
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{
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UInt8 type;
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if (JSONParser::isInt64(it))
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type = 'i';
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else if (JSONParser::isUInt64(it))
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type = 'u';
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else if (JSONParser::isDouble(it))
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type = 'd';
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else if (JSONParser::isBool(it))
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type = 'b';
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else if (JSONParser::isString(it))
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type = '"';
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else if (JSONParser::isArray(it))
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type = '[';
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else if (JSONParser::isObject(it))
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type = '{';
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else if (JSONParser::isNull(it))
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type = 0;
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else
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return false;
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ColumnVector<Int8> & col_vec = assert_cast<ColumnVector<Int8> &>(dest);
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col_vec.insertValue(type);
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return true;
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}
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static constexpr size_t num_extra_arguments = 0;
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static void prepare(const char *, const Block &, const ColumnNumbers &, size_t) {}
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};
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template <typename JSONParser, typename NumberType, bool convert_bool_to_integer = false>
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class JSONExtractNumericImpl
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{
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public:
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static DataTypePtr getType(const char *, const ColumnsWithTypeAndName &)
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{
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return std::make_shared<DataTypeNumber<NumberType>>();
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}
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using Iterator = typename JSONParser::Iterator;
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static bool addValueToColumn(IColumn & dest, const Iterator & it)
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{
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NumberType value;
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if (JSONParser::isInt64(it))
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{
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if (!accurate::convertNumeric(JSONParser::getInt64(it), value))
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return false;
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}
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else if (JSONParser::isUInt64(it))
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{
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if (!accurate::convertNumeric(JSONParser::getUInt64(it), value))
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return false;
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}
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else if (JSONParser::isDouble(it))
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{
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if (!accurate::convertNumeric(JSONParser::getDouble(it), value))
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return false;
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}
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else if (JSONParser::isBool(it) && is_integral_v<NumberType> && convert_bool_to_integer)
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value = static_cast<NumberType>(JSONParser::getBool(it));
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else
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return false;
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auto & col_vec = assert_cast<ColumnVector<NumberType> &>(dest);
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col_vec.insertValue(value);
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return true;
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}
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static constexpr size_t num_extra_arguments = 0;
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static void prepare(const char *, const Block &, const ColumnNumbers &, size_t) {}
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};
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template <typename JSONParser>
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using JSONExtractInt8Impl = JSONExtractNumericImpl<JSONParser, Int8>;
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template <typename JSONParser>
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using JSONExtractUInt8Impl = JSONExtractNumericImpl<JSONParser, UInt8>;
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template <typename JSONParser>
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using JSONExtractInt16Impl = JSONExtractNumericImpl<JSONParser, Int16>;
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template <typename JSONParser>
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using JSONExtractUInt16Impl = JSONExtractNumericImpl<JSONParser, UInt16>;
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template <typename JSONParser>
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using JSONExtractInt32Impl = JSONExtractNumericImpl<JSONParser, Int32>;
|
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template <typename JSONParser>
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using JSONExtractUInt32Impl = JSONExtractNumericImpl<JSONParser, UInt32>;
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template <typename JSONParser>
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using JSONExtractInt64Impl = JSONExtractNumericImpl<JSONParser, Int64>;
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template <typename JSONParser>
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using JSONExtractUInt64Impl = JSONExtractNumericImpl<JSONParser, UInt64>;
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template <typename JSONParser>
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using JSONExtractFloat32Impl = JSONExtractNumericImpl<JSONParser, Float32>;
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template <typename JSONParser>
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using JSONExtractFloat64Impl = JSONExtractNumericImpl<JSONParser, Float64>;
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|
|
|
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template <typename JSONParser>
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class JSONExtractBoolImpl
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|
{
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public:
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static DataTypePtr getType(const char *, const ColumnsWithTypeAndName &)
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|
{
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return std::make_shared<DataTypeUInt8>();
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}
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|
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using Iterator = typename JSONParser::Iterator;
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static bool addValueToColumn(IColumn & dest, const Iterator & it)
|
|
{
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if (!JSONParser::isBool(it))
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return false;
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|
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auto & col_vec = assert_cast<ColumnVector<UInt8> &>(dest);
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col_vec.insertValue(static_cast<UInt8>(JSONParser::getBool(it)));
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return true;
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}
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|
|
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static constexpr size_t num_extra_arguments = 0;
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static void prepare(const char *, const Block &, const ColumnNumbers &, size_t) {}
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};
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|
|
|
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template <typename JSONParser>
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class JSONExtractStringImpl
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|
{
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public:
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|
static DataTypePtr getType(const char *, const ColumnsWithTypeAndName &)
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|
{
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|
return std::make_shared<DataTypeString>();
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}
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|
|
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using Iterator = typename JSONParser::Iterator;
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static bool addValueToColumn(IColumn & dest, const Iterator & it)
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|
{
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if (!JSONParser::isString(it))
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return false;
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|
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StringRef str = JSONParser::getString(it);
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ColumnString & col_str = assert_cast<ColumnString &>(dest);
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col_str.insertData(str.data, str.size);
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return true;
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}
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|
|
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static constexpr size_t num_extra_arguments = 0;
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static void prepare(const char *, const Block &, const ColumnNumbers &, size_t) {}
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};
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|
|
|
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/// Nodes of the extract tree. We need the extract tree to extract from JSON complex values containing array, tuples or nullables.
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template <typename JSONParser>
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struct JSONExtractTree
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{
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using Iterator = typename JSONParser::Iterator;
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class Node
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{
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public:
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Node() {}
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virtual ~Node() {}
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virtual bool addValueToColumn(IColumn &, const Iterator &) = 0;
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};
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|
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template <typename NumberType>
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class NumericNode : public Node
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{
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public:
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bool addValueToColumn(IColumn & dest, const Iterator & it) override
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|
{
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return JSONExtractNumericImpl<JSONParser, NumberType, true>::addValueToColumn(dest, it);
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}
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};
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|
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class StringNode : public Node
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|
{
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|
public:
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|
bool addValueToColumn(IColumn & dest, const Iterator & it) override
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|
{
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|
return JSONExtractStringImpl<JSONParser>::addValueToColumn(dest, it);
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|
}
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|
};
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|
|
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class FixedStringNode : public Node
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|
{
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|
public:
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|
bool addValueToColumn(IColumn & dest, const Iterator & it) override
|
|
{
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|
if (!JSONParser::isString(it))
|
|
return false;
|
|
auto & col_str = assert_cast<ColumnFixedString &>(dest);
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|
StringRef str = JSONParser::getString(it);
|
|
if (str.size > col_str.getN())
|
|
return false;
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|
col_str.insertData(str.data, str.size);
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|
return true;
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|
}
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|
};
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|
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template <typename Type>
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class EnumNode : public Node
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|
{
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public:
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EnumNode(const std::vector<std::pair<String, Type>> & name_value_pairs_) : name_value_pairs(name_value_pairs_)
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|
{
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for (const auto & name_value_pair : name_value_pairs)
|
|
{
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name_to_value_map.emplace(name_value_pair.first, name_value_pair.second);
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only_values.emplace(name_value_pair.second);
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}
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}
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|
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bool addValueToColumn(IColumn & dest, const Iterator & it) override
|
|
{
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auto & col_vec = assert_cast<ColumnVector<Type> &>(dest);
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|
|
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if (JSONParser::isInt64(it))
|
|
{
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|
Type value;
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|
if (!accurate::convertNumeric(JSONParser::getInt64(it), value) || !only_values.count(value))
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return false;
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col_vec.insertValue(value);
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return true;
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|
}
|
|
|
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if (JSONParser::isUInt64(it))
|
|
{
|
|
Type value;
|
|
if (!accurate::convertNumeric(JSONParser::getUInt64(it), value) || !only_values.count(value))
|
|
return false;
|
|
col_vec.insertValue(value);
|
|
return true;
|
|
}
|
|
|
|
if (JSONParser::isString(it))
|
|
{
|
|
auto value = name_to_value_map.find(JSONParser::getString(it));
|
|
if (value == name_to_value_map.end())
|
|
return false;
|
|
col_vec.insertValue(value->second);
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
private:
|
|
std::vector<std::pair<String, Type>> name_value_pairs;
|
|
std::unordered_map<StringRef, Type> name_to_value_map;
|
|
std::unordered_set<Type> only_values;
|
|
};
|
|
|
|
class NullableNode : public Node
|
|
{
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|
public:
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|
NullableNode(std::unique_ptr<Node> nested_) : nested(std::move(nested_)) {}
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|
|
|
bool addValueToColumn(IColumn & dest, const Iterator & it) override
|
|
{
|
|
ColumnNullable & col_null = assert_cast<ColumnNullable &>(dest);
|
|
if (!nested->addValueToColumn(col_null.getNestedColumn(), it))
|
|
return false;
|
|
col_null.getNullMapColumn().insertValue(0);
|
|
return true;
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|
}
|
|
|
|
private:
|
|
std::unique_ptr<Node> nested;
|
|
};
|
|
|
|
class ArrayNode : public Node
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|
{
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|
public:
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|
ArrayNode(std::unique_ptr<Node> nested_) : nested(std::move(nested_)) {}
|
|
|
|
bool addValueToColumn(IColumn & dest, const Iterator & it) override
|
|
{
|
|
if (!JSONParser::isArray(it))
|
|
return false;
|
|
|
|
Iterator it2 = it;
|
|
if (!JSONParser::firstArrayElement(it2))
|
|
return false;
|
|
|
|
ColumnArray & col_arr = assert_cast<ColumnArray &>(dest);
|
|
auto & data = col_arr.getData();
|
|
size_t old_size = data.size();
|
|
bool were_valid_elements = false;
|
|
|
|
do
|
|
{
|
|
if (nested->addValueToColumn(data, it2))
|
|
were_valid_elements = true;
|
|
else
|
|
data.insertDefault();
|
|
}
|
|
while (JSONParser::nextArrayElement(it2));
|
|
|
|
if (!were_valid_elements)
|
|
{
|
|
data.popBack(data.size() - old_size);
|
|
return false;
|
|
}
|
|
|
|
col_arr.getOffsets().push_back(data.size());
|
|
return true;
|
|
}
|
|
|
|
private:
|
|
std::unique_ptr<Node> nested;
|
|
};
|
|
|
|
class TupleNode : public Node
|
|
{
|
|
public:
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|
TupleNode(std::vector<std::unique_ptr<Node>> nested_, const std::vector<String> & explicit_names_) : nested(std::move(nested_)), explicit_names(explicit_names_)
|
|
{
|
|
for (size_t i = 0; i != explicit_names.size(); ++i)
|
|
name_to_index_map.emplace(explicit_names[i], i);
|
|
}
|
|
|
|
bool addValueToColumn(IColumn & dest, const Iterator & it) override
|
|
{
|
|
ColumnTuple & tuple = assert_cast<ColumnTuple &>(dest);
|
|
size_t old_size = dest.size();
|
|
bool were_valid_elements = false;
|
|
|
|
auto set_size = [&](size_t size)
|
|
{
|
|
for (size_t i = 0; i != tuple.tupleSize(); ++i)
|
|
{
|
|
auto & col = tuple.getColumn(i);
|
|
if (col.size() != size)
|
|
{
|
|
if (col.size() > size)
|
|
col.popBack(col.size() - size);
|
|
else
|
|
while (col.size() < size)
|
|
col.insertDefault();
|
|
}
|
|
}
|
|
};
|
|
|
|
if (JSONParser::isArray(it))
|
|
{
|
|
Iterator it2 = it;
|
|
if (!JSONParser::firstArrayElement(it2))
|
|
return false;
|
|
|
|
for (size_t index = 0; index != nested.size(); ++index)
|
|
{
|
|
if (nested[index]->addValueToColumn(tuple.getColumn(index), it2))
|
|
were_valid_elements = true;
|
|
else
|
|
tuple.getColumn(index).insertDefault();
|
|
if (!JSONParser::nextArrayElement(it2))
|
|
break;
|
|
}
|
|
|
|
set_size(old_size + static_cast<size_t>(were_valid_elements));
|
|
return were_valid_elements;
|
|
}
|
|
|
|
if (JSONParser::isObject(it))
|
|
{
|
|
if (name_to_index_map.empty())
|
|
{
|
|
Iterator it2 = it;
|
|
if (!JSONParser::firstObjectMember(it2))
|
|
return false;
|
|
|
|
for (size_t index = 0; index != nested.size(); ++index)
|
|
{
|
|
if (nested[index]->addValueToColumn(tuple.getColumn(index), it2))
|
|
were_valid_elements = true;
|
|
else
|
|
tuple.getColumn(index).insertDefault();
|
|
if (!JSONParser::nextObjectMember(it2))
|
|
break;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
Iterator it2 = it;
|
|
StringRef key;
|
|
if (!JSONParser::firstObjectMember(it2, key))
|
|
return false;
|
|
|
|
do
|
|
{
|
|
auto index = name_to_index_map.find(key);
|
|
if (index != name_to_index_map.end())
|
|
{
|
|
if (nested[index->second]->addValueToColumn(tuple.getColumn(index->second), it2))
|
|
were_valid_elements = true;
|
|
}
|
|
}
|
|
while (JSONParser::nextObjectMember(it2, key));
|
|
}
|
|
|
|
set_size(old_size + static_cast<size_t>(were_valid_elements));
|
|
return were_valid_elements;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
private:
|
|
std::vector<std::unique_ptr<Node>> nested;
|
|
std::vector<String> explicit_names;
|
|
std::unordered_map<StringRef, size_t> name_to_index_map;
|
|
};
|
|
|
|
static std::unique_ptr<Node> build(const char * function_name, const DataTypePtr & type)
|
|
{
|
|
switch (type->getTypeId())
|
|
{
|
|
case TypeIndex::UInt8: return std::make_unique<NumericNode<UInt8>>();
|
|
case TypeIndex::UInt16: return std::make_unique<NumericNode<UInt16>>();
|
|
case TypeIndex::UInt32: return std::make_unique<NumericNode<UInt32>>();
|
|
case TypeIndex::UInt64: return std::make_unique<NumericNode<UInt64>>();
|
|
case TypeIndex::Int8: return std::make_unique<NumericNode<Int8>>();
|
|
case TypeIndex::Int16: return std::make_unique<NumericNode<Int16>>();
|
|
case TypeIndex::Int32: return std::make_unique<NumericNode<Int32>>();
|
|
case TypeIndex::Int64: return std::make_unique<NumericNode<Int64>>();
|
|
case TypeIndex::Float32: return std::make_unique<NumericNode<Float32>>();
|
|
case TypeIndex::Float64: return std::make_unique<NumericNode<Float64>>();
|
|
case TypeIndex::String: return std::make_unique<StringNode>();
|
|
case TypeIndex::FixedString: return std::make_unique<FixedStringNode>();
|
|
case TypeIndex::Enum8:
|
|
return std::make_unique<EnumNode<Int8>>(static_cast<const DataTypeEnum8 &>(*type).getValues());
|
|
case TypeIndex::Enum16:
|
|
return std::make_unique<EnumNode<Int16>>(static_cast<const DataTypeEnum16 &>(*type).getValues());
|
|
case TypeIndex::Nullable:
|
|
{
|
|
return std::make_unique<NullableNode>(build(function_name, static_cast<const DataTypeNullable &>(*type).getNestedType()));
|
|
}
|
|
case TypeIndex::Array:
|
|
{
|
|
return std::make_unique<ArrayNode>(build(function_name, static_cast<const DataTypeArray &>(*type).getNestedType()));
|
|
}
|
|
case TypeIndex::Tuple:
|
|
{
|
|
const auto & tuple = static_cast<const DataTypeTuple &>(*type);
|
|
const auto & tuple_elements = tuple.getElements();
|
|
std::vector<std::unique_ptr<Node>> elements;
|
|
for (const auto & tuple_element : tuple_elements)
|
|
elements.emplace_back(build(function_name, tuple_element));
|
|
return std::make_unique<TupleNode>(std::move(elements), tuple.haveExplicitNames() ? tuple.getElementNames() : Strings{});
|
|
}
|
|
default:
|
|
throw Exception{"Function " + String(function_name) + " doesn't support the return type schema: " + type->getName(), ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT};
|
|
}
|
|
}
|
|
};
|
|
|
|
template <typename JSONParser>
|
|
class JSONExtractImpl
|
|
{
|
|
public:
|
|
static constexpr size_t num_extra_arguments = 1;
|
|
|
|
static DataTypePtr getType(const char * function_name, const ColumnsWithTypeAndName & arguments)
|
|
{
|
|
if (arguments.size() < 2)
|
|
throw Exception{"Function " + String(function_name) + " requires at least two arguments", ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH};
|
|
|
|
const auto & col = arguments.back();
|
|
auto col_type_const = typeid_cast<const ColumnConst *>(col.column.get());
|
|
if (!col_type_const || !isString(col.type))
|
|
throw Exception{"The last argument of function " + String(function_name)
|
|
+ " should be a constant string specifying the return data type, illegal value: " + col.column->getName(),
|
|
ErrorCodes::ILLEGAL_COLUMN};
|
|
|
|
return DataTypeFactory::instance().get(col_type_const->getValue<String>());
|
|
}
|
|
|
|
void prepare(const char * function_name, const Block & block, const ColumnNumbers &, size_t result_pos)
|
|
{
|
|
extract_tree = JSONExtractTree<JSONParser>::build(function_name, block.getByPosition(result_pos).type);
|
|
}
|
|
|
|
using Iterator = typename JSONParser::Iterator;
|
|
bool addValueToColumn(IColumn & dest, const Iterator & it)
|
|
{
|
|
return extract_tree->addValueToColumn(dest, it);
|
|
}
|
|
|
|
protected:
|
|
std::unique_ptr<typename JSONExtractTree<JSONParser>::Node> extract_tree;
|
|
};
|
|
|
|
|
|
template <typename JSONParser>
|
|
class JSONExtractKeysAndValuesImpl
|
|
{
|
|
public:
|
|
static constexpr size_t num_extra_arguments = 1;
|
|
|
|
static DataTypePtr getType(const char * function_name, const ColumnsWithTypeAndName & arguments)
|
|
{
|
|
if (arguments.size() < 2)
|
|
throw Exception{"Function " + String(function_name) + " requires at least two arguments", ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH};
|
|
|
|
const auto & col = arguments.back();
|
|
auto col_type_const = typeid_cast<const ColumnConst *>(col.column.get());
|
|
if (!col_type_const || !isString(col.type))
|
|
throw Exception{"The last argument of function " + String(function_name)
|
|
+ " should be a constant string specifying the values' data type, illegal value: " + col.column->getName(),
|
|
ErrorCodes::ILLEGAL_COLUMN};
|
|
|
|
DataTypePtr value_type = DataTypeFactory::instance().get(col_type_const->getValue<String>());
|
|
DataTypePtr key_type = std::make_unique<DataTypeString>();
|
|
DataTypePtr tuple_type = std::make_unique<DataTypeTuple>(DataTypes{key_type, value_type});
|
|
return std::make_unique<DataTypeArray>(tuple_type);
|
|
}
|
|
|
|
void prepare(const char * function_name, const Block & block, const ColumnNumbers &, size_t result_pos)
|
|
{
|
|
const auto & result_type = block.getByPosition(result_pos).type;
|
|
const auto tuple_type = typeid_cast<const DataTypeArray *>(result_type.get())->getNestedType();
|
|
const auto value_type = typeid_cast<const DataTypeTuple *>(tuple_type.get())->getElements()[1];
|
|
extract_tree = JSONExtractTree<JSONParser>::build(function_name, value_type);
|
|
}
|
|
|
|
using Iterator = typename JSONParser::Iterator;
|
|
bool addValueToColumn(IColumn & dest, const Iterator & it)
|
|
{
|
|
if (!JSONParser::isObject(it))
|
|
return false;
|
|
|
|
auto & col_arr = assert_cast<ColumnArray &>(dest);
|
|
auto & col_tuple = assert_cast<ColumnTuple &>(col_arr.getData());
|
|
size_t old_size = col_tuple.size();
|
|
auto & col_key = assert_cast<ColumnString &>(col_tuple.getColumn(0));
|
|
auto & col_value = col_tuple.getColumn(1);
|
|
|
|
StringRef key;
|
|
Iterator it2 = it;
|
|
if (!JSONParser::firstObjectMember(it2, key))
|
|
return false;
|
|
|
|
do
|
|
{
|
|
if (extract_tree->addValueToColumn(col_value, it2))
|
|
col_key.insertData(key.data, key.size);
|
|
}
|
|
while (JSONParser::nextObjectMember(it2, key));
|
|
|
|
if (col_tuple.size() == old_size)
|
|
return false;
|
|
|
|
col_arr.getOffsets().push_back(col_tuple.size());
|
|
return true;
|
|
}
|
|
|
|
private:
|
|
std::unique_ptr<typename JSONExtractTree<JSONParser>::Node> extract_tree;
|
|
};
|
|
|
|
|
|
template <typename JSONParser>
|
|
class JSONExtractRawImpl
|
|
{
|
|
public:
|
|
static DataTypePtr getType(const char *, const ColumnsWithTypeAndName &)
|
|
{
|
|
return std::make_shared<DataTypeString>();
|
|
}
|
|
|
|
using Iterator = typename JSONParser::Iterator;
|
|
static bool addValueToColumn(IColumn & dest, const Iterator & it)
|
|
{
|
|
ColumnString & col_str = assert_cast<ColumnString &>(dest);
|
|
auto & chars = col_str.getChars();
|
|
WriteBufferFromVector<ColumnString::Chars> buf(chars, WriteBufferFromVector<ColumnString::Chars>::AppendModeTag());
|
|
traverse(it, buf);
|
|
buf.finalize();
|
|
chars.push_back(0);
|
|
col_str.getOffsets().push_back(chars.size());
|
|
return true;
|
|
}
|
|
|
|
static constexpr size_t num_extra_arguments = 0;
|
|
static void prepare(const char *, const Block &, const ColumnNumbers &, size_t) {}
|
|
|
|
private:
|
|
static void traverse(const Iterator & it, WriteBuffer & buf)
|
|
{
|
|
if (JSONParser::isInt64(it))
|
|
{
|
|
writeIntText(JSONParser::getInt64(it), buf);
|
|
return;
|
|
}
|
|
if (JSONParser::isUInt64(it))
|
|
{
|
|
writeIntText(JSONParser::getUInt64(it), buf);
|
|
return;
|
|
}
|
|
if (JSONParser::isDouble(it))
|
|
{
|
|
writeFloatText(JSONParser::getDouble(it), buf);
|
|
return;
|
|
}
|
|
if (JSONParser::isBool(it))
|
|
{
|
|
if (JSONParser::getBool(it))
|
|
writeCString("true", buf);
|
|
else
|
|
writeCString("false", buf);
|
|
return;
|
|
}
|
|
if (JSONParser::isString(it))
|
|
{
|
|
writeJSONString(JSONParser::getString(it), buf, format_settings());
|
|
return;
|
|
}
|
|
if (JSONParser::isArray(it))
|
|
{
|
|
writeChar('[', buf);
|
|
Iterator it2 = it;
|
|
if (JSONParser::firstArrayElement(it2))
|
|
{
|
|
traverse(it2, buf);
|
|
while (JSONParser::nextArrayElement(it2))
|
|
{
|
|
writeChar(',', buf);
|
|
traverse(it2, buf);
|
|
}
|
|
}
|
|
writeChar(']', buf);
|
|
return;
|
|
}
|
|
if (JSONParser::isObject(it))
|
|
{
|
|
writeChar('{', buf);
|
|
Iterator it2 = it;
|
|
StringRef key;
|
|
if (JSONParser::firstObjectMember(it2, key))
|
|
{
|
|
writeJSONString(key, buf, format_settings());
|
|
writeChar(':', buf);
|
|
traverse(it2, buf);
|
|
while (JSONParser::nextObjectMember(it2, key))
|
|
{
|
|
writeChar(',', buf);
|
|
writeJSONString(key, buf, format_settings());
|
|
writeChar(':', buf);
|
|
traverse(it2, buf);
|
|
}
|
|
}
|
|
writeChar('}', buf);
|
|
return;
|
|
}
|
|
if (JSONParser::isNull(it))
|
|
{
|
|
writeCString("null", buf);
|
|
return;
|
|
}
|
|
}
|
|
|
|
static const FormatSettings & format_settings()
|
|
{
|
|
static const FormatSettings the_instance = []
|
|
{
|
|
FormatSettings settings;
|
|
settings.json.escape_forward_slashes = false;
|
|
return settings;
|
|
}();
|
|
return the_instance;
|
|
}
|
|
};
|
|
|
|
template <typename JSONParser>
|
|
class JSONExtractArrayRawImpl
|
|
{
|
|
public:
|
|
static DataTypePtr getType(const char *, const ColumnsWithTypeAndName &)
|
|
{
|
|
return std::make_shared<DataTypeArray>(std::make_shared<DataTypeString>());
|
|
}
|
|
|
|
using Iterator = typename JSONParser::Iterator;
|
|
static bool addValueToColumn(IColumn & dest, const Iterator & it)
|
|
{
|
|
if (!JSONParser::isArray(it))
|
|
{
|
|
return false;
|
|
}
|
|
ColumnArray & col_res = assert_cast<ColumnArray &>(dest);
|
|
Iterator array_it = it;
|
|
size_t size = 0;
|
|
if (JSONParser::firstArrayElement(array_it))
|
|
{
|
|
do
|
|
{
|
|
JSONExtractRawImpl<JSONParser>::addValueToColumn(col_res.getData(), array_it);
|
|
++size;
|
|
} while (JSONParser::nextArrayElement(array_it));
|
|
}
|
|
|
|
col_res.getOffsets().push_back(col_res.getOffsets().back() + size);
|
|
return true;
|
|
}
|
|
|
|
static constexpr size_t num_extra_arguments = 0;
|
|
static void prepare(const char *, const Block &, const ColumnNumbers &, size_t) {}
|
|
};
|
|
}
|