Struct DropFunctionStatement 

pub struct DropFunctionStatement { /* private fields */ }

Available on crate feature database and non-WebAssembly only.

DROP FUNCTION statement builder

This struct provides a fluent API for constructing DROP FUNCTION queries.

Examples

use reinhardt_query::prelude::*;

// DROP FUNCTION my_func
let query = Query::drop_function()
    .name("my_func");

// DROP FUNCTION IF EXISTS my_func(integer) CASCADE
let query = Query::drop_function()
    .name("my_func")
    .if_exists()
    .add_parameter("", "integer")
    .cascade();

Implementations

impl DropFunctionStatement

pub fn new() -> DropFunctionStatement

Create a new DROP FUNCTION statement

Examples

use reinhardt_query::prelude::*;

let query = Query::drop_function();

pub fn take(&mut self) -> DropFunctionStatement

Take the ownership of data in the current DropFunctionStatement

pub fn name<N>(&mut self, name: N) -> &mut DropFunctionStatement

where N: IntoIden,

Set the function name

Examples

use reinhardt_query::prelude::*;

let query = Query::drop_function()
    .name("my_func");

pub fn add_parameter<N, T>( &mut self, name: N, param_type: T, ) -> &mut DropFunctionStatement

where N: IntoIden, T: Into<String>,

Add a function parameter (for identifying which overloaded function to drop)

Examples

use reinhardt_query::prelude::*;

// DROP FUNCTION my_func(integer, text)
let query = Query::drop_function()
    .name("my_func")
    .add_parameter("", "integer")
    .add_parameter("", "text");

pub fn if_exists(&mut self) -> &mut DropFunctionStatement

Add IF EXISTS clause

Examples

use reinhardt_query::prelude::*;

let query = Query::drop_function()
    .name("my_func")
    .if_exists();

pub fn cascade(&mut self) -> &mut DropFunctionStatement

Add CASCADE clause

Examples

use reinhardt_query::prelude::*;

let query = Query::drop_function()
    .name("my_func")
    .cascade();

Trait Implementations

impl Clone for DropFunctionStatement

fn clone(&self) -> DropFunctionStatement

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DropFunctionStatement

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

Formats the value using the given formatter.

impl Default for DropFunctionStatement

fn default() -> DropFunctionStatement

Returns the “default value” for a type.

impl QueryStatementBuilder for DropFunctionStatement

fn build_any( &self, query_builder: &(dyn QueryBuilderTrait + 'static), ) -> (String, Values)

Build SQL statement for a database backend and collect query parameters

fn to_string<T>(&self, query_builder: T) -> String

where T: QueryBuilderTrait,

Build SQL statement for a database backend and return SQL string with values inlined as SQL literals.

fn build<T>(&self, query_builder: T) -> (String, Values)

where T: QueryBuilderTrait,

Build SQL statement with parameter collection

impl QueryStatementWriter for DropFunctionStatement