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351 lines
11 KiB
C++
351 lines
11 KiB
C++
#include <Access/SettingsConstraints.h>
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#include <Core/Settings.h>
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#include <Common/FieldVisitors.h>
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#include <IO/WriteHelpers.h>
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#include <Poco/Util/AbstractConfiguration.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 NOT_IMPLEMENTED;
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extern const int READONLY;
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extern const int QUERY_IS_PROHIBITED;
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extern const int NO_ELEMENTS_IN_CONFIG;
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extern const int SETTING_CONSTRAINT_VIOLATION;
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}
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SettingsConstraints::SettingsConstraints() = default;
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SettingsConstraints::SettingsConstraints(const SettingsConstraints & src) = default;
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SettingsConstraints & SettingsConstraints::operator=(const SettingsConstraints & src) = default;
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SettingsConstraints::SettingsConstraints(SettingsConstraints && src) = default;
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SettingsConstraints & SettingsConstraints::operator=(SettingsConstraints && src) = default;
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SettingsConstraints::~SettingsConstraints() = default;
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void SettingsConstraints::clear()
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{
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constraints_by_index.clear();
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}
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void SettingsConstraints::setMinValue(const StringRef & name, const Field & min_value)
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{
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size_t setting_index = Settings::findIndexStrict(name);
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getConstraintRef(setting_index).min_value = Settings::valueToCorrespondingType(setting_index, min_value);
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}
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Field SettingsConstraints::getMinValue(const StringRef & name) const
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{
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size_t setting_index = Settings::findIndexStrict(name);
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const auto * ptr = tryGetConstraint(setting_index);
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if (ptr)
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return ptr->min_value;
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else
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return {};
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}
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void SettingsConstraints::setMaxValue(const StringRef & name, const Field & max_value)
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{
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size_t setting_index = Settings::findIndexStrict(name);
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getConstraintRef(setting_index).max_value = Settings::valueToCorrespondingType(setting_index, max_value);
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}
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Field SettingsConstraints::getMaxValue(const StringRef & name) const
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{
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size_t setting_index = Settings::findIndexStrict(name);
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const auto * ptr = tryGetConstraint(setting_index);
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if (ptr)
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return ptr->max_value;
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else
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return {};
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}
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void SettingsConstraints::setReadOnly(const StringRef & name, bool read_only)
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{
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size_t setting_index = Settings::findIndexStrict(name);
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getConstraintRef(setting_index).read_only = read_only;
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}
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bool SettingsConstraints::isReadOnly(const StringRef & name) const
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{
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size_t setting_index = Settings::findIndexStrict(name);
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const auto * ptr = tryGetConstraint(setting_index);
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if (ptr)
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return ptr->read_only;
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else
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return false;
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}
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void SettingsConstraints::set(const StringRef & name, const Field & min_value, const Field & max_value, bool read_only)
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{
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size_t setting_index = Settings::findIndexStrict(name);
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auto & ref = getConstraintRef(setting_index);
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ref.min_value = min_value;
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ref.max_value = max_value;
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ref.read_only = read_only;
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}
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void SettingsConstraints::get(const StringRef & name, Field & min_value, Field & max_value, bool & read_only) const
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{
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size_t setting_index = Settings::findIndexStrict(name);
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const auto * ptr = tryGetConstraint(setting_index);
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if (ptr)
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{
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min_value = ptr->min_value;
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max_value = ptr->max_value;
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read_only = ptr->read_only;
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}
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else
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{
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min_value = Field{};
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max_value = Field{};
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read_only = false;
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}
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}
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void SettingsConstraints::merge(const SettingsConstraints & other)
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{
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for (const auto & [setting_index, other_constraint] : other.constraints_by_index)
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{
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auto & constraint = constraints_by_index[setting_index];
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if (!other_constraint.min_value.isNull())
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constraint.min_value = other_constraint.min_value;
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if (!other_constraint.max_value.isNull())
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constraint.max_value = other_constraint.max_value;
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if (other_constraint.read_only)
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constraint.read_only = true;
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}
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}
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SettingsConstraints::Infos SettingsConstraints::getInfo() const
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{
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Infos result;
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result.reserve(constraints_by_index.size());
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for (const auto & [setting_index, constraint] : constraints_by_index)
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{
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result.emplace_back();
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Info & info = result.back();
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info.name = Settings::getName(setting_index);
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info.min = constraint.min_value;
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info.max = constraint.max_value;
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info.read_only = constraint.read_only;
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}
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return result;
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}
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void SettingsConstraints::check(const Settings & current_settings, const SettingChange & change) const
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{
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const String & name = change.name;
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size_t setting_index = Settings::findIndex(name);
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if (setting_index == Settings::npos)
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return;
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Field new_value = Settings::valueToCorrespondingType(setting_index, change.value);
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Field current_value = current_settings.get(setting_index);
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/// Setting isn't checked if value wasn't changed.
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if (current_value == new_value)
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return;
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if (!current_settings.allow_ddl && name == "allow_ddl")
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throw Exception("Cannot modify 'allow_ddl' setting when DDL queries are prohibited for the user", ErrorCodes::QUERY_IS_PROHIBITED);
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/** The `readonly` value is understood as follows:
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* 0 - everything allowed.
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* 1 - only read queries can be made; you can not change the settings.
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* 2 - You can only do read queries and you can change the settings, except for the `readonly` setting.
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*/
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if (current_settings.readonly == 1)
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throw Exception("Cannot modify '" + name + "' setting in readonly mode", ErrorCodes::READONLY);
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if (current_settings.readonly > 1 && name == "readonly")
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throw Exception("Cannot modify 'readonly' setting in readonly mode", ErrorCodes::READONLY);
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const Constraint * constraint = tryGetConstraint(setting_index);
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if (constraint)
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{
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if (constraint->read_only)
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throw Exception("Setting " + name + " should not be changed", ErrorCodes::SETTING_CONSTRAINT_VIOLATION);
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if (!constraint->min_value.isNull() && (new_value < constraint->min_value))
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throw Exception(
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"Setting " + name + " shouldn't be less than " + applyVisitor(FieldVisitorToString(), constraint->min_value),
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ErrorCodes::SETTING_CONSTRAINT_VIOLATION);
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if (!constraint->max_value.isNull() && (new_value > constraint->max_value))
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throw Exception(
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"Setting " + name + " shouldn't be greater than " + applyVisitor(FieldVisitorToString(), constraint->max_value),
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ErrorCodes::SETTING_CONSTRAINT_VIOLATION);
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}
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}
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void SettingsConstraints::check(const Settings & current_settings, const SettingsChanges & changes) const
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{
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for (const auto & change : changes)
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check(current_settings, change);
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}
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void SettingsConstraints::clamp(const Settings & current_settings, SettingChange & change) const
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{
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const String & name = change.name;
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size_t setting_index = Settings::findIndex(name);
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if (setting_index == Settings::npos)
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return;
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Field new_value = Settings::valueToCorrespondingType(setting_index, change.value);
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Field current_value = current_settings.get(setting_index);
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/// Setting isn't checked if value wasn't changed.
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if (current_value == new_value)
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return;
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if (!current_settings.allow_ddl && name == "allow_ddl")
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{
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change.value = current_value;
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return;
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}
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/** The `readonly` value is understood as follows:
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* 0 - everything allowed.
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* 1 - only read queries can be made; you can not change the settings.
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* 2 - You can only do read queries and you can change the settings, except for the `readonly` setting.
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*/
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if (current_settings.readonly == 1)
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{
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change.value = current_value;
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return;
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}
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if (current_settings.readonly > 1 && name == "readonly")
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{
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change.value = current_value;
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return;
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}
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const Constraint * constraint = tryGetConstraint(setting_index);
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if (constraint)
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{
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if (constraint->read_only)
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{
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change.value = current_value;
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return;
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}
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if (!constraint->min_value.isNull() && (new_value < constraint->min_value))
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{
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if (!constraint->max_value.isNull() && (constraint->min_value > constraint->max_value))
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change.value = current_value;
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else
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change.value = constraint->min_value;
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return;
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}
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if (!constraint->max_value.isNull() && (new_value > constraint->max_value))
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{
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change.value = constraint->max_value;
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return;
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}
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}
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}
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void SettingsConstraints::clamp(const Settings & current_settings, SettingsChanges & changes) const
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{
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for (auto & change : changes)
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clamp(current_settings, change);
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}
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SettingsConstraints::Constraint & SettingsConstraints::getConstraintRef(size_t index)
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{
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auto it = constraints_by_index.find(index);
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if (it == constraints_by_index.end())
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it = constraints_by_index.emplace(index, Constraint{}).first;
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return it->second;
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}
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const SettingsConstraints::Constraint * SettingsConstraints::tryGetConstraint(size_t index) const
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{
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auto it = constraints_by_index.find(index);
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if (it == constraints_by_index.end())
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return nullptr;
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return &it->second;
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}
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void SettingsConstraints::setProfile(const String & profile_name, const Poco::Util::AbstractConfiguration & config)
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{
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String elem = "profiles." + profile_name;
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Poco::Util::AbstractConfiguration::Keys config_keys;
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config.keys(elem, config_keys);
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for (const std::string & key : config_keys)
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{
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if (key == "profile" || key.starts_with("profile[")) /// Inheritance of profiles from the current one.
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setProfile(config.getString(elem + "." + key), config);
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else
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continue;
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}
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String path_to_constraints = "profiles." + profile_name + ".constraints";
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if (config.has(path_to_constraints))
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loadFromConfig(path_to_constraints, config);
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}
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void SettingsConstraints::loadFromConfig(const String & path_to_constraints, const Poco::Util::AbstractConfiguration & config)
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{
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if (!config.has(path_to_constraints))
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throw Exception("There is no path '" + path_to_constraints + "' in configuration file.", ErrorCodes::NO_ELEMENTS_IN_CONFIG);
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Poco::Util::AbstractConfiguration::Keys names;
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config.keys(path_to_constraints, names);
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for (const String & name : names)
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{
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String path_to_name = path_to_constraints + "." + name;
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Poco::Util::AbstractConfiguration::Keys constraint_types;
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config.keys(path_to_name, constraint_types);
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for (const String & constraint_type : constraint_types)
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{
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auto get_constraint_value = [&]{ return config.getString(path_to_name + "." + constraint_type); };
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if (constraint_type == "min")
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setMinValue(name, get_constraint_value());
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else if (constraint_type == "max")
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setMaxValue(name, get_constraint_value());
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else if (constraint_type == "readonly")
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setReadOnly(name, true);
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else
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throw Exception("Setting " + constraint_type + " value for " + name + " isn't supported", ErrorCodes::NOT_IMPLEMENTED);
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}
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}
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}
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bool SettingsConstraints::Constraint::operator==(const Constraint & rhs) const
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{
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return (read_only == rhs.read_only) && (min_value == rhs.min_value) && (max_value == rhs.max_value);
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}
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bool operator ==(const SettingsConstraints & lhs, const SettingsConstraints & rhs)
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{
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return lhs.constraints_by_index == rhs.constraints_by_index;
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}
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}
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