storages::clickhouse::Query Class Reference

#include <userver/storages/query.hpp>

Detailed Description

Holds a query, its name and logging mode; used by all the SQL databases of userver.

Holds a query, its name and logging mode; used by all the SQL databases of userver.

Prefer using via Embedding SQL/YQL files via userver_add_sql_library or use a const variable with name specified as NameLiteral.

Note

You may write a query in .sql file and generate a header file with Query from it. See Embedding SQL/YQL files via userver_add_sql_library for more information.

Prefer using via Embedding SQL/YQL files via userver_add_sql_library or use a const variable with name specified as NameLiteral.

Note

You may write a query in .sql file and generate a header file with Query from it. See Embedding SQL/YQL files via userver_add_sql_library for more information.

Definition at line 28 of file query.hpp.

Classes
class	NameLiteral
	Compile time literal with query name. More...

Public Types
enum class	LogMode : unsigned char {   kFull ,   kNameOnly }
using	Name = utils::StrongTypedef<struct NameTag, std::string>
	String with query name.
using	NameView = utils::zstring_view
	Zero terminated view to the query name.

Public Member Functions
	Query (const Query &other)=default
	Query (Query &&other)=default
constexpr	Query (utils::StringLiteral statement, NameLiteral name, LogMode log_mode)
	Constructor that omits dynamic initialization and relies on statement and name being string literals.
	Query (const char *statement, std::optional< Name > name=std::nullopt, LogMode log_mode=LogMode::kFull)
	Query (std::string statement, std::optional< Name > name=std::nullopt, LogMode log_mode=LogMode::kFull)
Query &	operator= (const Query &other)=default
Query &	operator= (Query &&other)=default
std::optional< NameView >	GetOptionalNameView () const noexcept
std::optional< Name >	GetOptionalName () const
utils::zstring_view	GetStatementView () const noexcept
LogMode	GetLogMode () const noexcept

Member Typedef Documentation

Name

using storages::Query::Name = utils::StrongTypedef<struct NameTag, std::string>

String with query name.

Definition at line 31 of file query.hpp.

NameView

using storages::Query::NameView = utils::zstring_view

Zero terminated view to the query name.

Definition at line 34 of file query.hpp.

Member Enumeration Documentation

LogMode

enum class storages::Query::LogMode : unsigned char

strong

Enumerator
kFull	Output name and optionally statement.
kNameOnly	Output only name.

Definition at line 52 of file query.hpp.

Constructor & Destructor Documentation

Query() [1/3]

storages::Query::Query ( utils::StringLiteral statement, NameLiteral name, LogMode log_mode )

inlineconstexpr

Constructor that omits dynamic initialization and relies on statement and name being string literals.

Definition at line 66 of file query.hpp.

Query() [2/3]

storages::Query::Query ( const char * statement, std::optional< Name > name = std::nullopt, LogMode log_mode = LogMode::kFull )

inline

Definition at line 69 of file query.hpp.

Query() [3/3]

storages::Query::Query ( std::string statement, std::optional< Name > name = std::nullopt, LogMode log_mode = LogMode::kFull )

inline

Definition at line 71 of file query.hpp.

Member Function Documentation

GetLogMode()

LogMode storages::Query::GetLogMode ( ) const

inlinenoexcept

Returns

logging mode

Definition at line 84 of file query.hpp.

GetOptionalName()

std::optional< Name > storages::Query::GetOptionalName ( ) const

inline

Returns

optional queury name suitable for construction of a new Query

Definition at line 78 of file query.hpp.

GetOptionalNameView()

std::optional< NameView > storages::Query::GetOptionalNameView ( ) const

noexcept

Returns

view to the query name that is alive as long as *this is alive

GetStatementView()

utils::zstring_view storages::Query::GetStatementView ( ) const

noexcept

Returns

zero terminated view to the statement that is alive as long as *this is alive

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The documentation for this class was generated from the following file:

• userver/storages/query.hpp