Struct af_postgres::StatementBuilder

pub struct StatementBuilder<'a> { /* fields omitted */ }

A helper struct for building a complex one-off statement its parameter values.

Implementations

impl<'a> StatementBuilder<'a>

pub fn new() -> Self

Creates a new, empty statement builder.

pub fn append(&mut self, text: impl Display)

Appends text to the query.

pub fn add_param(&mut self, param: &'a (dyn ToSql + Sync)) -> usize

Adds a parameter to the statement and returns its index.

The index is the number to use as a placeholder in statement text. This is intended for adding parameters when the number of parameters is not known at compile time. For example:

write!(builder, "WHERE id = ${}", builder.add_param(id))?;

pub fn params(&self) -> &[&'a (dyn ToSql + Sync)]

Returns a reference to the statement params.

pub fn text(&self) -> &str

Returns a reference to the statement text.

Trait Implementations

impl<'a> Debug for StatementBuilder<'a>

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

Formats the value using the given formatter.

impl Default for StatementBuilder<'_>

fn default() -> Self

Returns the "default value" for a type.

impl<'a> Write for StatementBuilder<'a>

fn write_str(&mut self, s: &str) -> Result

Writes a string slice into this writer, returning whether the write succeeded.

pub fn write_char(&mut self, c: char) -> Result<(), Error>

Writes a char into this writer, returning whether the write succeeded.

pub fn write_fmt(&mut self, args: Arguments<'_>) -> Result<(), Error>

Glue for usage of the write! macro with implementors of this trait.