database::integrated::query_param Struct Reference

#include <unified_database_system.h>

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Public Member Functions
	query_param (const std::string &v)
	query_param (std::string &&v)
	query_param (const char *v)
	query_param (std::nullptr_t)
	query_param (int v)
	query_param (long v)
	query_param (long long v)
	query_param (unsigned int v)
	query_param (unsigned long v)
	query_param (unsigned long long v)
	query_param (double v)
	query_param (float v)
	query_param (bool v)
bool	is_null () const noexcept
	Check if this parameter represents a NULL value.
const std::string &	get_value () const noexcept
	Get the string value (returns empty string for null)
std::string	to_sql_string () const
	Get the value for SQL generation.

Public Attributes
std::optional< std::string >	value

Detailed Description

Definition at line 199 of file unified_database_system.h.

Constructor & Destructor Documentation

query_param() [1/13]

database::integrated::query_param::query_param ( const std::string & v )

inline

Examples

/home/runner/work/database_system/database_system/database/integrated/unified_database_system.h.

Definition at line 203 of file unified_database_system.h.

: value(v) {}

query_param() [2/13]

database::integrated::query_param::query_param ( std::string && v )

inline

Definition at line 204 of file unified_database_system.h.

: value(std::move(v)) {}

query_param() [3/13]

database::integrated::query_param::query_param ( const char * v )

inline

Definition at line 205 of file unified_database_system.h.

: value(v ? std::optional<std::string>(v) : std::nullopt) {}

query_param() [4/13]

database::integrated::query_param::query_param ( std::nullptr_t )

inline

Definition at line 206 of file unified_database_system.h.

: value(std::nullopt) {}

query_param() [5/13]

database::integrated::query_param::query_param ( int v )

inline

Definition at line 207 of file unified_database_system.h.

: value(std::to_string(v)) {}

query_param() [6/13]

database::integrated::query_param::query_param ( long v )

inline

Definition at line 208 of file unified_database_system.h.

: value(std::to_string(v)) {}

query_param() [7/13]

database::integrated::query_param::query_param ( long long v )

inline

Definition at line 209 of file unified_database_system.h.

: value(std::to_string(v)) {}

query_param() [8/13]

database::integrated::query_param::query_param ( unsigned int v )

inline

Definition at line 210 of file unified_database_system.h.

: value(std::to_string(v)) {}

query_param() [9/13]

database::integrated::query_param::query_param ( unsigned long v )

inline

Definition at line 211 of file unified_database_system.h.

: value(std::to_string(v)) {}

query_param() [10/13]

database::integrated::query_param::query_param ( unsigned long long v )

inline

Definition at line 212 of file unified_database_system.h.

: value(std::to_string(v)) {}

query_param() [11/13]

database::integrated::query_param::query_param ( double v )

inline

Definition at line 213 of file unified_database_system.h.

: value(std::to_string(v)) {}

query_param() [12/13]

database::integrated::query_param::query_param ( float v )

inline

Definition at line 214 of file unified_database_system.h.

: value(std::to_string(v)) {}

query_param() [13/13]

database::integrated::query_param::query_param ( bool v )

inline

Definition at line 215 of file unified_database_system.h.

: value(v ? "true" : "false") {}

Member Function Documentation

get_value()

const std::string & database::integrated::query_param::get_value ( ) const

inlinenoexcept

Get the string value (returns empty string for null)

Returns

The parameter value as string, or empty string if null

Note

Use is_null() to distinguish between empty string and null

Examples

/home/runner/work/database_system/database_system/database/integrated/unified_database_system.h.

Definition at line 228 of file unified_database_system.h.

                                                {
        static const std::string empty_string;
        return value.has_value() ? *value : empty_string;
    }

References value.

Referenced by test_query_param_null_safety().

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is_null()

bool database::integrated::query_param::is_null ( ) const

inlinenoexcept

Check if this parameter represents a NULL value.

Returns

true if the parameter is null

Examples

/home/runner/work/database_system/database_system/database/integrated/unified_database_system.h.

Definition at line 221 of file unified_database_system.h.

{ return !value.has_value(); }

References value.

Referenced by test_query_param_null_safety().

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to_sql_string()

std::string database::integrated::query_param::to_sql_string ( ) const

inline

Get the value for SQL generation.

Returns

"NULL" for null values, otherwise the quoted/escaped value

Examples

/home/runner/work/database_system/database_system/database/integrated/unified_database_system.h.

Definition at line 237 of file unified_database_system.h.

                                    {
        return value.has_value() ? *value : "NULL";
    }

References value.

Referenced by test_query_param_null_safety().

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Member Data Documentation

value

std::optional<std::string> database::integrated::query_param::value

Examples

/home/runner/work/database_system/database_system/database/integrated/unified_database_system.h.

Definition at line 200 of file unified_database_system.h.

Referenced by get_value(), is_null(), and to_sql_string().

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

• database/integrated/unified_database_system.h