Abstract: A method, a system, and a computer program product for executing a query. A query plan for execution of a query is generated. The query requires access to at least one table stored in a database system. The query includes one or more filter predicates. A filter predicate in the one or more filter predicates is selected. For the selected filter predicate, a plurality of cost function values associated executing a filter evaluation of the selected filter predicate are determined. Filter evaluation of the selected predicate is executed in accordance with at least one determined cost function value in the plurality of cost function values.

Abstract: A method, a system, and a computer program product for executing a query. The query requiring access to one or more tables stored in a database system is executed. The query includes one or more filter predicates. Using a unique key value corresponding to a first predicate, at most one row in the tables including a portion of data matching the unique key value is identified. Using filter values corresponding to the filter predicates, another portion of data in the identified row is compared to the filter values to determine whether that portion of data matches the filter values. Based on the comparison, a result of the execution of the query is outputted. The result includes data stored in the identified row upon determination that the data matches the unique key value corresponding to the first filter predicate and the filter values corresponding to remaining filter predicates. Otherwise, the result is empty.

Abstract: A thermal system for a vehicle having a comprehensive cooling circuit, a refrigeration circuit, a cooling circuit, a heating circuit, and a plurality of switched states is disclosed. The cooling circuit is connected with a heat source of the vehicle. The cooling circuit has a high-voltage accumulator (HVA) circuit to which a high-voltage accumulator for supplying power to an electric drivetrain of the vehicle is connected. An ambient cooler is connected to the cooling circuit downstream of the heat source. A chiller for transferring heat from the HVA circuit into the refrigeration circuit is also connected to the refrigeration circuit. A first switched state, in which the HVA circuit downstream and upstream of the heat source is connected to the cooling circuit, can be set such that an extended HVA circuit, in which the high-voltage accumulator and the heat source are connected in series is configured.

Abstract: A control system and method for a heating system of an electric vehicle or hybrid vehicle is embodied such that when there is a heating request for a high-voltage accumulator, an HVAA heating mode is activated in which the high-voltage accumulator which is connected to an HVA circuit of the heating system is heated by an HVA heating source which is activated for this purpose so that heat is generated in the HVA circuit or transferred into the circuit. When there is a heating request for a passenger compartment of the vehicle, an air-conditioning heating mode is activated in which the passenger compartment is heated by a heating circuit, with heat which is generated in the heating circuit with an auxiliary heater or is transferred into the heating circuit with a heat pump, or both.

Abstract: A control system for a heating system of an electric or hybrid vehicle with a coolant cooled high voltage store. The control system includes an air conditioning evaporator of a refrigeration circuit of the heating system through which refrigerant circulates to cool the passenger compartment when a cooling requirement for a passenger compartment of the vehicle and for which an air conditioning cooling mode is set. The system further includes a chiller to cool the high voltage store when a cooling requirement for the high voltage store of the vehicle and for which a high voltage store (HVS) cooling mode is set. The control system selects the regulating variable for the compressor from a plurality of different regulating variables based on whether the air conditioning cooling mode is set, whether the HVS cooling mode is set, and/or whether both the air conditioning cooling and HVS cooling modes are set.

Abstract: A control system and method for a heating system of an electric vehicle or hybrid vehicle is embodied such that when there is a heating request for a passenger compartment of the vehicle, a heating mode is set in order to heat the passenger compartment by heat from a heating circuit. In a mixed mode, excess heat in the heating circuit is output to the surroundings via a surroundings cooler in a cooling circuit, or in an excess mode it is retained in the heating system, in order to satisfy a heating request. In the mixed mode, a degree of opening of the heating circuit is set such that only a partial quantity of coolant from the heating circuit is exchanged with the cooling circuit and as a result the excess heat is output to the surroundings. The mixed mode is activated if the excess heat in the heating circuit exceeds a threshold value which is determined in accordance with the external temperature.

Abstract: A system for generating a query plan is provided. In some example embodiments, the system performs operations comprising: determining, at a query execution engine, a first primitive call for implementing a query operation on data at a database; performing the query operation by at least sending, to a data management engine coupled to the database, the first primitive call for execution by the data management engine; and determining, based at least on a result of the first primitive call, a result of the query operation. Related methods and articles of manufacture, including computer program products, are also described.

Abstract: A control system method is disclosed for air-conditioning a vehicle by a heat pump system, wherein one of multiple operating modes is automatically set, depending on the air-conditioning requirement. The passenger space is cooled by an air-conditioning evaporator and/or is heated by a heating heat exchanger. The heating heat exchanger is arranged in a heating branch of a coolant circuit and is provided with heat via a heat pump. If cooling is required, the heating branch is opened and the heating pump is deactivated. If heating is required, the heating branch is closed and heat is fed to the heating heat exchanger via the heat pump. In order to remove heat from the heating branch, same is opened and a low-temperature cooler, the condenser and the heating heat exchanger are operated connected in series.

Abstract: In some example embodiments, a system is provided for executing a primitive call that implements a query operation. The system may include a data processor and a memory. The memory may store instructions that result in operations when executed by the data processor. The operations may include: executing, at an data management engine, the primitive call by at least performing a first operation with respect to a value identifier set, the value identifier set including one or more value identifiers, and the primitive call being configured to access a database storing a plurality of value identifiers; and generating, based at least on a result of the first operation, a result for the primitive call. Related methods and articles of manufacture, including computer program products, are also described.

Abstract: A heating system for an electric or hybrid vehicle, to which a high-voltage accumulator is connected, includes a coolant circuit having a heating circuit to which a heating heat exchanger is connected for air-conditioning the interior, and having a cooling circuit to which a cooler and a heat source are connected. The heating system has at least two refrigerating circuits, wherein a first refrigerating circuit includes an air-conditioning evaporator for air-conditioning the interior, and a first condenser, by which the first refrigerating circuit is thermally coupled to the coolant circuit in order to dissipate heat from the first refrigerating circuit. The second refrigerating circuit is thermally coupled by a second condenser to the coolant circuit. The two refrigerating circuits, however, are not coupled to each other. At least one of the refrigerating circuits further includes a chiller in order to dissipate heat from the coolant circuit.

Abstract: A heat pump system for climate control of an electric or hybrid vehicle includes an air conditioning unit having a heating heat exchanger, and an air conditioning unit evaporator having a refrigeration circuit, in which the air conditioning unit evaporator and a condenser are arranged. The refrigeration circuit includes a low temperature (LT) circuit in which at least one electrical power component is arranged. The heat pump system is configured to switch over between a cooling mode and a heating mode. The condenser, which is configured to transfer heat into the LT circuit, and an LT cooler are incorporated into the LT circuit. In the heating mode, the condenser outputs heat into the LT circuit and from there into a heating circuit, in which the heating heat exchanger is arranged, and in the cooling mode, the condenser outputs heat via the LT circuit to the LT cooler.

Abstract: Temperature control of an interior of a motor vehicle having an electrical drive is carried out by a heat pump arrangement having a heating temperature region and a low temperature region, wherein the heating temperature region includes at least one interior heat exchanger thermally coupled to the interior and the low temperature region includes at least one of an exterior heat exchanger and a heat exchanger disposed on a component of the electrical drive.

Abstract: A system for query execution and planning with pipelining and pump operators is provided. In some implementations, the system performs operations comprising identifying a plurality of operators for executing a query, the plurality of operators including a first operator and a second operator, generating a pump operator when the first operator comprises a table scan operator, and/or generating a query plan for execution of the query, the query plan comprising the pump operator and the second operator. The operations can further include executing the pump operator to at least retrieve a portion of a database table, generate a first data portion based on the portion of the database table, and provide the first data portion for the second operator. Related systems, methods, and articles of manufacture are also described.

Abstract: A cooling apparatus for a motor vehicle includes a coolant circuit through which a coolant can flow, a coolant compressor, a first evaporator, at least one second evaporator, a first suction line for leading the coolant from the first evaporator to the coolant compressor, a second suction line, a main line connected fluidically to suction lines at a connecting point, and at least one internal heat exchanger, through which coolant flowing from the at least one of the evaporators to the coolant compressor can flow. The internal heat exchanger is arranged in at least one of the suction lines and the connecting point is arranged downstream of the at least one heat exchanger.

Abstract: A heating system for an electric or hybrid vehicle, to which a high-voltage accumulator is connected, includes a coolant circuit having a heating circuit to which a heating heat exchanger is connected for air-conditioning the interior, and having a cooling circuit to which a cooler and a heat source are connected. The heating system has at least two refrigerating circuits, wherein a first refrigerating circuit includes an air-conditioning evaporator for air-conditioning the interior, and a first condenser, by which the first refrigerating circuit is thermally coupled to the coolant circuit in order to dissipate heat from the first refrigerating circuit. The second refrigerating circuit is thermally coupled by a second condenser to the coolant circuit. The two refrigerating circuits, however, are not coupled to each other. At least one of the refrigerating circuits further includes a chiller in order to dissipate heat from the coolant circuit.

Abstract: An air-conditioning device for air-conditioning a passenger compartment is provided. The air-conditioning device includes a cooling element for cooling air, an air duct downstream of the cooling element for guiding the air, a heating element downstream of the air duct for warming the air, a mixing zone downstream of the heating element, and multiple air outlets for discharging multiple partial air streams from the mixing zone into different regions of the passenger compartment. An additional cold air bypass is formed which is guided past the heating element for supplying additional cold air downstream of the heating element. As a result, the air-conditioning device in operation is particularly efficient and simultaneously simple in design and particularly cost-effective. Furthermore, the invention provides a method for operating the air-conditioning device.

Abstract: A heating system for an electric or hybrid vehicle is provided. The heating system includes a refrigerant circuit, a heater heat exchanger which is arranged in a heating circuit, for air-conditioning the interior, a high-voltage storage device which is arranged in an HVS circuit, and a cooler which is arranged in a cooling circuit. The heating circuit, the HVS circuit, and the cooling circuit are integrated into a common coolant circuit. In a first HVS cooling operation, the HVS circuit is separated from the cooling circuit and connected to a chiller in order to discharge heat into the refrigerant circuit. In a second HVS cooling operation, the HVS circuit is connected to the cooling circuit via a chiller bypass in order to discharge heat via the cooler.

Abstract: A system for generating a query plan is provided. In some example embodiments, the system performs operations comprising: determining, at a query execution engine, a first primitive call for implementing a query operation on data at a database; performing the query operation by at least sending, to a data management engine coupled to the database, the first primitive call for execution by the data management engine; and determining, based at least on a result of the first primitive call, a result of the query operation. Related methods and articles of manufacture, including computer program products, are also described.

Abstract: In some example embodiments, a system is provided for executing a primitive call that implements a query operation. The system may include a data processor and a memory. The memory may store instructions that result in operations when executed by the data processor. The operations may include: executing, at an data management engine, the primitive call by at least performing a first operation with respect to a value identifier set, the value identifier set including one or more value identifiers, and the primitive call being configured to access a database storing a plurality of value identifiers; and generating, based at least on a result of the first operation, a result for the primitive call. Related methods and articles of manufacture, including computer program products, are also described.

Abstract: A heat pump system for air conditioning a vehicle, in particular an electric or hybrid vehicle, includes an air conditioning unit which has an air conditioning evaporator and a heating heat exchanger, for air conditioning a passenger compartment of the vehicle. A condenser transmits heat from a refrigeration circuit into a coolant circuit, and a chiller transmits heat from the coolant circuit into the refrigeration circuit. The coolant circuit has two branches which are parallel to one another downstream of a low temperature cooler, namely a heating branch which can be shut off and in which the condenser and the heating heat exchanger are arranged, and a cooling branch, in which the chiller and a low temperature heat exchanger for cooling a vehicle component are arranged. The low temperature cooler, the condenser and the heating heat exchanger are connected in series with respect to one another. The heat pump system has a plurality of operating modes.