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https://github.com/ClickHouse/ClickHouse.git
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495c6e03aa
* Replace all Context references with std::weak_ptr * Fix shared context captured by value * Fix build * Fix Context with named sessions * Fix copy context * Fix gcc build * Merge with master and fix build * Fix gcc-9 build
93 lines
2.7 KiB
C++
93 lines
2.7 KiB
C++
#include <TableFunctions/TableFunctionFactory.h>
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#include <Interpreters/Context.h>
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#include <Common/CurrentThread.h>
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#include <Common/Exception.h>
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#include <IO/WriteHelpers.h>
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#include <Parsers/ASTFunction.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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extern const int LOGICAL_ERROR;
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}
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void TableFunctionFactory::registerFunction(const std::string & name, Value creator, CaseSensitiveness case_sensitiveness)
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{
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if (!table_functions.emplace(name, creator).second)
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throw Exception("TableFunctionFactory: the table function name '" + name + "' is not unique",
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ErrorCodes::LOGICAL_ERROR);
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if (case_sensitiveness == CaseInsensitive
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&& !case_insensitive_table_functions.emplace(Poco::toLower(name), creator).second)
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throw Exception("TableFunctionFactory: the case insensitive table function name '" + name + "' is not unique",
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ErrorCodes::LOGICAL_ERROR);
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}
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TableFunctionPtr TableFunctionFactory::get(
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const ASTPtr & ast_function,
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ContextPtr context) const
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{
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const auto * table_function = ast_function->as<ASTFunction>();
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auto res = tryGet(table_function->name, context);
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if (!res)
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{
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auto hints = getHints(table_function->name);
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if (!hints.empty())
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throw Exception(ErrorCodes::UNKNOWN_FUNCTION, "Unknown table function {}. Maybe you meant: {}", table_function->name , toString(hints));
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else
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throw Exception(ErrorCodes::UNKNOWN_FUNCTION, "Unknown table function {}", table_function->name);
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}
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res->parseArguments(ast_function, context);
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return res;
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}
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TableFunctionPtr TableFunctionFactory::tryGet(
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const std::string & name_param,
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ContextPtr) const
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{
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String name = getAliasToOrName(name_param);
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TableFunctionPtr res;
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auto it = table_functions.find(name);
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if (table_functions.end() != it)
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res = it->second();
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else
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{
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it = case_insensitive_table_functions.find(Poco::toLower(name));
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if (case_insensitive_table_functions.end() != it)
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res = it->second();
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}
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if (!res)
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return nullptr;
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if (CurrentThread::isInitialized())
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{
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auto query_context = CurrentThread::get().getQueryContext();
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if (query_context && query_context->getSettingsRef().log_queries)
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query_context->addQueryFactoriesInfo(Context::QueryLogFactories::TableFunction, name);
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}
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return res;
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}
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bool TableFunctionFactory::isTableFunctionName(const std::string & name) const
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{
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return table_functions.count(name);
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}
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TableFunctionFactory & TableFunctionFactory::instance()
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{
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static TableFunctionFactory ret;
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return ret;
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}
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}
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