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6a8fa2d4a5
Implementation: * Added a new field allow_readonly to table system.table_functions. * Updated to use new field allow_readonly to allow using table functions in readonly mode. * Added TableFunctionProperties similar to AggregateFunctionProperties. * The functions allowed in readonly mode are in this set table_functions_allowed_in_readonly_mode. Testing: * Added a test for filesystem tests/queries/0_stateless/02473_functions_in_readonly_mode.sh Documentation: * Updated the english documentation for Table Functions.
43 lines
1.2 KiB
C++
43 lines
1.2 KiB
C++
#include <Storages/System/StorageSystemTableFunctions.h>
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#include <TableFunctions/TableFunctionFactory.h>
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#include <DataTypes/DataTypesNumber.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_FUNCTION;
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}
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NamesAndTypesList StorageSystemTableFunctions::getNamesAndTypes()
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{
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return
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{
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{"name", std::make_shared<DataTypeString>()},
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{"description", std::make_shared<DataTypeString>()},
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{"allow_readonly", std::make_shared<DataTypeUInt8>()}
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};
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}
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void StorageSystemTableFunctions::fillData(MutableColumns & res_columns, ContextPtr, const SelectQueryInfo &) const
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{
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const auto & factory = TableFunctionFactory::instance();
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const auto & functions_names = factory.getAllRegisteredNames();
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for (const auto & function_name : functions_names)
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{
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res_columns[0]->insert(function_name);
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auto properties = factory.tryGetProperties(function_name);
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if (properties)
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{
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res_columns[1]->insert(properties->documentation.description);
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res_columns[2]->insert(properties->allow_readonly);
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}
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else
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throw Exception(ErrorCodes::UNKNOWN_FUNCTION, "Unknown table function {}", function_name);
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}
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}
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}
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