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https://github.com/ClickHouse/ClickHouse.git
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358 lines
13 KiB
C++
358 lines
13 KiB
C++
#include "DictionaryStructure.h"
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#include <Columns/IColumn.h>
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#include <DataTypes/DataTypeFactory.h>
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#include <DataTypes/DataTypeNullable.h>
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#include <Formats/FormatSettings.h>
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#include <IO/WriteHelpers.h>
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#include <Common/StringUtils/StringUtils.h>
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#include <numeric>
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#include <unordered_map>
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#include <unordered_set>
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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 UNKNOWN_TYPE;
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extern const int ARGUMENT_OUT_OF_BOUND;
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extern const int TYPE_MISMATCH;
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extern const int BAD_ARGUMENTS;
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}
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namespace
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{
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DictionaryTypedSpecialAttribute makeDictionaryTypedSpecialAttribute(
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const Poco::Util::AbstractConfiguration & config, const std::string & config_prefix, const std::string & default_type)
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{
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const auto name = config.getString(config_prefix + ".name", "");
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const auto expression = config.getString(config_prefix + ".expression", "");
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if (name.empty() && !expression.empty())
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throw Exception{"Element " + config_prefix + ".name is empty", ErrorCodes::BAD_ARGUMENTS};
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const auto type_name = config.getString(config_prefix + ".type", default_type);
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return DictionaryTypedSpecialAttribute{std::move(name), std::move(expression), DataTypeFactory::instance().get(type_name)};
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}
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}
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AttributeUnderlyingType getAttributeUnderlyingType(const std::string & type)
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{
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static const std::unordered_map<std::string, AttributeUnderlyingType> dictionary{
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{"UInt8", AttributeUnderlyingType::utUInt8},
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{"UInt16", AttributeUnderlyingType::utUInt16},
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{"UInt32", AttributeUnderlyingType::utUInt32},
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{"UInt64", AttributeUnderlyingType::utUInt64},
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{"UUID", AttributeUnderlyingType::utUInt128},
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{"Int8", AttributeUnderlyingType::utInt8},
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{"Int16", AttributeUnderlyingType::utInt16},
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{"Int32", AttributeUnderlyingType::utInt32},
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{"Int64", AttributeUnderlyingType::utInt64},
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{"Float32", AttributeUnderlyingType::utFloat32},
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{"Float64", AttributeUnderlyingType::utFloat64},
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{"String", AttributeUnderlyingType::utString},
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{"Date", AttributeUnderlyingType::utUInt16},
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{"DateTime", AttributeUnderlyingType::utUInt32},
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};
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const auto it = dictionary.find(type);
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if (it != std::end(dictionary))
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return it->second;
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if (type.find("Decimal") == 0)
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{
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size_t start = strlen("Decimal");
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if (type.find("32", start) == start)
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return AttributeUnderlyingType::utDecimal32;
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if (type.find("64", start) == start)
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return AttributeUnderlyingType::utDecimal64;
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if (type.find("128", start) == start)
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return AttributeUnderlyingType::utDecimal128;
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}
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// Temporary hack to allow arrays in keys, since they are never retrieved for polygon dictionaries.
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// TODO: This should be fixed by fully supporting arrays in dictionaries.
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if (type.find("Array") == 0)
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return AttributeUnderlyingType::utString;
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throw Exception{"Unknown type " + type, ErrorCodes::UNKNOWN_TYPE};
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}
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std::string toString(const AttributeUnderlyingType type)
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{
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switch (type)
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{
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case AttributeUnderlyingType::utUInt8:
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return "UInt8";
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case AttributeUnderlyingType::utUInt16:
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return "UInt16";
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case AttributeUnderlyingType::utUInt32:
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return "UInt32";
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case AttributeUnderlyingType::utUInt64:
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return "UInt64";
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case AttributeUnderlyingType::utUInt128:
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return "UUID";
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case AttributeUnderlyingType::utInt8:
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return "Int8";
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case AttributeUnderlyingType::utInt16:
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return "Int16";
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case AttributeUnderlyingType::utInt32:
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return "Int32";
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case AttributeUnderlyingType::utInt64:
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return "Int64";
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case AttributeUnderlyingType::utFloat32:
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return "Float32";
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case AttributeUnderlyingType::utFloat64:
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return "Float64";
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case AttributeUnderlyingType::utDecimal32:
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return "Decimal32";
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case AttributeUnderlyingType::utDecimal64:
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return "Decimal64";
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case AttributeUnderlyingType::utDecimal128:
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return "Decimal128";
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case AttributeUnderlyingType::utString:
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return "String";
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}
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throw Exception{"Unknown attribute_type " + toString(static_cast<int>(type)), ErrorCodes::ARGUMENT_OUT_OF_BOUND};
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}
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DictionarySpecialAttribute::DictionarySpecialAttribute(const Poco::Util::AbstractConfiguration & config, const std::string & config_prefix)
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: name{config.getString(config_prefix + ".name", "")}, expression{config.getString(config_prefix + ".expression", "")}
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{
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if (name.empty() && !expression.empty())
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throw Exception{"Element " + config_prefix + ".name is empty", ErrorCodes::BAD_ARGUMENTS};
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}
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DictionaryStructure::DictionaryStructure(const Poco::Util::AbstractConfiguration & config, const std::string & config_prefix)
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{
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const auto has_id = config.has(config_prefix + ".id");
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const auto has_key = config.has(config_prefix + ".key");
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if (has_key && has_id)
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throw Exception{"Only one of 'id' and 'key' should be specified", ErrorCodes::BAD_ARGUMENTS};
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if (has_id)
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id.emplace(config, config_prefix + ".id");
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else if (has_key)
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{
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key.emplace(getAttributes(config, config_prefix + ".key", false, false));
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if (key->empty())
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throw Exception{"Empty 'key' supplied", ErrorCodes::BAD_ARGUMENTS};
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}
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else
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throw Exception{"Dictionary structure should specify either 'id' or 'key'", ErrorCodes::BAD_ARGUMENTS};
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if (id)
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{
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if (id->name.empty())
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throw Exception{"'id' cannot be empty", ErrorCodes::BAD_ARGUMENTS};
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const auto range_default_type = "Date";
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if (config.has(config_prefix + ".range_min"))
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range_min.emplace(makeDictionaryTypedSpecialAttribute(config, config_prefix + ".range_min", range_default_type));
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if (config.has(config_prefix + ".range_max"))
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range_max.emplace(makeDictionaryTypedSpecialAttribute(config, config_prefix + ".range_max", range_default_type));
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if (range_min.has_value() != range_max.has_value())
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{
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throw Exception{"Dictionary structure should have both 'range_min' and 'range_max' either specified or not.",
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ErrorCodes::BAD_ARGUMENTS};
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}
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if (range_min && range_max && !range_min->type->equals(*range_max->type))
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{
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throw Exception{"Dictionary structure 'range_min' and 'range_max' should have same type, "
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"'range_min' type: "
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+ range_min->type->getName()
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+ ", "
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"'range_max' type: "
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+ range_max->type->getName(),
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ErrorCodes::BAD_ARGUMENTS};
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}
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if (range_min)
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{
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if (!range_min->type->isValueRepresentedByInteger())
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throw Exception{"Dictionary structure type of 'range_min' and 'range_max' should be an integer, Date, DateTime, or Enum."
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" Actual 'range_min' and 'range_max' type is "
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+ range_min->type->getName(),
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ErrorCodes::BAD_ARGUMENTS};
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}
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if (!id->expression.empty() || (range_min && !range_min->expression.empty()) || (range_max && !range_max->expression.empty()))
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has_expressions = true;
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}
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attributes = getAttributes(config, config_prefix);
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if (attributes.empty())
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throw Exception{"Dictionary has no attributes defined", ErrorCodes::BAD_ARGUMENTS};
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}
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void DictionaryStructure::validateKeyTypes(const DataTypes & key_types) const
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{
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if (key_types.size() != key->size())
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throw Exception{"Key structure does not match, expected " + getKeyDescription(), ErrorCodes::TYPE_MISMATCH};
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for (const auto i : ext::range(0, key_types.size()))
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{
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const auto & expected_type = (*key)[i].type->getName();
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const auto & actual_type = key_types[i]->getName();
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if (expected_type != actual_type)
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throw Exception{"Key type at position " + std::to_string(i) + " does not match, expected " + expected_type + ", found "
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+ actual_type,
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ErrorCodes::TYPE_MISMATCH};
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}
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}
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std::string DictionaryStructure::getKeyDescription() const
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{
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if (id)
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return "UInt64";
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std::ostringstream out;
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out << '(';
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auto first = true;
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for (const auto & key_i : *key)
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{
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if (!first)
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out << ", ";
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first = false;
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out << key_i.type->getName();
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}
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out << ')';
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return out.str();
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}
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bool DictionaryStructure::isKeySizeFixed() const
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{
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if (!key)
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return true;
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for (const auto & key_i : *key)
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if (key_i.underlying_type == AttributeUnderlyingType::utString)
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return false;
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return true;
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}
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size_t DictionaryStructure::getKeySize() const
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{
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return std::accumulate(std::begin(*key), std::end(*key), size_t{}, [](const auto running_size, const auto & key_i)
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{
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return running_size + key_i.type->getSizeOfValueInMemory();
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});
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}
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static void checkAttributeKeys(const Poco::Util::AbstractConfiguration::Keys & keys)
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{
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static const std::unordered_set<std::string> valid_keys
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= {"name", "type", "expression", "null_value", "hierarchical", "injective", "is_object_id"};
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for (const auto & key : keys)
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{
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if (valid_keys.find(key) == valid_keys.end())
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throw Exception{"Unknown key '" + key + "' inside attribute section", ErrorCodes::BAD_ARGUMENTS};
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}
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}
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std::vector<DictionaryAttribute> DictionaryStructure::getAttributes(
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const Poco::Util::AbstractConfiguration & config,
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const std::string & config_prefix,
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const bool hierarchy_allowed,
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const bool allow_null_values)
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{
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Poco::Util::AbstractConfiguration::Keys config_elems;
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config.keys(config_prefix, config_elems);
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auto has_hierarchy = false;
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std::vector<DictionaryAttribute> res_attributes;
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const FormatSettings format_settings;
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for (const auto & config_elem : config_elems)
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{
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if (!startsWith(config_elem, "attribute"))
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continue;
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const auto prefix = config_prefix + '.' + config_elem + '.';
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Poco::Util::AbstractConfiguration::Keys attribute_keys;
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config.keys(config_prefix + '.' + config_elem, attribute_keys);
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checkAttributeKeys(attribute_keys);
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const auto name = config.getString(prefix + "name");
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const auto type_string = config.getString(prefix + "type");
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const auto type = DataTypeFactory::instance().get(type_string);
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const auto underlying_type = getAttributeUnderlyingType(type_string);
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const auto expression = config.getString(prefix + "expression", "");
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if (!expression.empty())
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has_expressions = true;
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Field null_value;
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if (allow_null_values)
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{
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const auto null_value_string = config.getString(prefix + "null_value");
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try
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{
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if (null_value_string.empty())
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null_value = type->getDefault();
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else
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{
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ReadBufferFromString null_value_buffer{null_value_string};
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auto column_with_null_value = type->createColumn();
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type->deserializeAsTextEscaped(*column_with_null_value, null_value_buffer, format_settings);
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null_value = (*column_with_null_value)[0];
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}
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}
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catch (Exception & e)
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{
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e.addMessage("error parsing null_value");
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throw;
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}
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}
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const auto hierarchical = config.getBool(prefix + "hierarchical", false);
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const auto injective = config.getBool(prefix + "injective", false);
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const auto is_object_id = config.getBool(prefix + "is_object_id", false);
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if (name.empty())
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throw Exception{"Properties 'name' and 'type' of an attribute cannot be empty", ErrorCodes::BAD_ARGUMENTS};
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if (has_hierarchy && !hierarchy_allowed)
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throw Exception{"Hierarchy not allowed in '" + prefix, ErrorCodes::BAD_ARGUMENTS};
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if (has_hierarchy && hierarchical)
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throw Exception{"Only one hierarchical attribute supported", ErrorCodes::BAD_ARGUMENTS};
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has_hierarchy = has_hierarchy || hierarchical;
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res_attributes.emplace_back(
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DictionaryAttribute{name, underlying_type, type, expression, null_value, hierarchical, injective, is_object_id});
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}
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return res_attributes;
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}
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}
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