Enum Value 

pub enum Value {
    Null,
    Bool(bool),
    Integer(i64),
    Float(f64),
    String(String),
    Bytes(Vec<u8>),
}

Represents a value from a PostgreSQL query result.

This enum provides type-safe access to various PostgreSQL data types and includes conversion methods for common Rust types.

Variants

Null

Bool(bool)

Integer(i64)

Float(f64)

String(String)

Bytes(Vec<u8>)

Implementations

impl Value

pub fn as_str(&self) -> Option<&str>

Try to get the value as a string reference.

Returns None if the value is not a String.

Example

use pgwire_lite::Value;

let val = Value::from("hello");
assert_eq!(val.as_str(), Some("hello"));

let val = Value::Integer(42);
assert_eq!(val.as_str(), None);

pub fn as_bool(&self) -> Option<bool>

Try to get the value as a boolean.

Returns Some(bool) if the value is a boolean or a string that can be interpreted as a boolean (e.g., “true”, “yes”, “1”). Returns None for other types or strings that cannot be parsed as booleans.

Example

use pgwire_lite::Value;

let val = Value::Bool(true);
assert_eq!(val.as_bool(), Some(true));

let val = Value::from("yes");
assert_eq!(val.as_bool(), Some(true));

let val = Value::from("0");
assert_eq!(val.as_bool(), Some(false));

let val = Value::from("invalid");
assert_eq!(val.as_bool(), None);

pub fn as_i64(&self) -> Option<i64>

Try to get the value as a 64-bit signed integer.

Returns Some(i64) if the value is an integer, a float that can be converted to an integer, or a string that can be parsed as an integer. Returns None for other types or values that cannot be converted.

Example

use pgwire_lite::Value;

let val = Value::Integer(42);
assert_eq!(val.as_i64(), Some(42));

let val = Value::Float(42.0);
assert_eq!(val.as_i64(), Some(42));

let val = Value::from("42");
assert_eq!(val.as_i64(), Some(42));

let val = Value::from("invalid");
assert_eq!(val.as_i64(), None);

pub fn as_f64(&self) -> Option<f64>

Try to get the value as a 64-bit floating point number.

Returns Some(f64) if the value is a float, an integer, or a string that can be parsed as a float. Returns None for other types or values that cannot be converted.

Example

use pgwire_lite::Value;

let val = Value::Float(3.14);
assert_eq!(val.as_f64(), Some(3.14));

let val = Value::Integer(42);
assert_eq!(val.as_f64(), Some(42.0));

let val = Value::from("3.14");
assert_eq!(val.as_f64(), Some(3.14));

let val = Value::from("invalid");
assert_eq!(val.as_f64(), None);

pub fn is_null(&self) -> bool

Check if the value is NULL.

Example

use pgwire_lite::Value;

let val = Value::Null;
assert!(val.is_null());

let val = Value::Integer(42);
assert!(!val.is_null());

Trait Implementations

impl Clone for Value

fn clone(&self) -> Value

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Value

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Value

fn default() -> Value

Returns the “default value” for a type.

impl Display for Value

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl From<&str> for Value

fn from(s: &str) -> Self

Converts to this type from the input type.

impl From<String> for Value

fn from(s: String) -> Self

Converts to this type from the input type.

impl From<Vec<u8>> for Value

fn from(b: Vec<u8>) -> Self

Converts to this type from the input type.

impl From<bool> for Value

fn from(b: bool) -> Self

Converts to this type from the input type.

impl From<f64> for Value

fn from(f: f64) -> Self

Converts to this type from the input type.

impl From<i32> for Value

fn from(i: i32) -> Self

Converts to this type from the input type.

impl From<i64> for Value

fn from(i: i64) -> Self

Converts to this type from the input type.