Struct DropIndex

pub struct DropIndex { /* private fields */ }

Builder to contruct a DropIndex command. Available only for the crate features postgresql and sqlite.

Basic API

use sql_query_builder as sql;

let query = sql::DropIndex::new()
  .drop_index("users_name_idx")
  .as_string();

Output

DROP INDEX users_name_idx

Implementations

impl DropIndex

pub fn as_string(&self) -> String

Gets the current state of the DropIndex and returns it as string

Example

let query = sql::DropIndex::new()
  .drop_index("users_name_idx")
  .as_string();

Output

DROP INDEX users_name_idx

pub fn drop_index(self, index_name: &str) -> Self

Defines a drop index parameter, this method overrides the previous value

Example 1

 let query = sql::DropIndex::new()
   .drop_index("users_name_idx")
   .drop_index("orders_product_name_idx")
   .as_string();

Outputs

DROP INDEX orders_product_name_idx

Example 2 crate features postgresql only

Multiples call will concatenates all values

 let query = sql::DropIndex::new()
   .drop_index("users_name_idx")
   .drop_index("orders_product_name_idx")
   .as_string();

Outputs

DROP INDEX users_name_idx, orders_product_name_idx

pub fn drop_index_if_exists(self, index_name: &str) -> Self

Defines a drop index parameter with the if exists modifier, this method overrides the previous value

Example 1

let query = sql::DropIndex::new()
  .drop_index("users_name_idx")
  .drop_index_if_exists("orders_product_name_idx")
  .to_string();

Outputs

DROP INDEX IF EXISTS orders_product_name_idx

Example 2 crate features postgresql only

Multiples call will concatenates all values

let query = sql::DropIndex::new()
  .drop_index("users_name_idx")
  .drop_index_if_exists("orders_product_name_idx")
  .to_string();

Outputs

DROP INDEX IF EXISTS users_name_idx, orders_product_name_idx

pub fn debug(self) -> Self

Prints the current state of the DropIndex to the standard output in a more ease to read version. This method is useful to debug complex queries or just print the generated SQL while you type

Example

let query = sql::DropIndex::new()
  .drop_index("users_name_idx")
  .debug()
  .as_string();

Prints to the standard output

-- ------------------------------------------------------------------------------
DROP INDEX users_name_idx
-- ------------------------------------------------------------------------------

pub fn new() -> Self

Creates instance of the DropIndex command

pub fn print(self) -> Self

Prints the current state of the DropIndex to the standard output similar to debug method, the difference is that this method prints in one line.

pub fn raw(self, raw_sql: &str) -> Self

Adds at the beginning a raw SQL query. Is useful to create a more complex drop index command.

Example

let drop_index_query = sql::DropIndex::new()
  .raw("/* drop index command */")
  .drop_index("users_name_idx")
  .as_string();

Output

/* drop index command */ DROP INDEX users_name_idx

pub fn raw_after(self, param: DropIndexParams, raw_sql: &str) -> Self

Adds a raw SQL query after a specified parameter.

The DropIndexParams::DropIndex works both to .drop_index and .drop_index_if_exist methods

Example

let query = sql::DropIndex::new()
  .drop_index("users_name_idx")
  .raw_after(sql::DropIndexParams::DropIndex, "/* end drop index */")
  .as_string();

Output

DROP INDEX users_name_idx /* end drop index */

pub fn raw_before(self, param: DropIndexParams, raw_sql: &str) -> Self

Adds a raw SQL query before a specified parameter.

The DropIndexParams::DropIndex works both to .drop_index and .drop_index_if_exist methods

Example

let raw = "/* drop index command */";

let query = sql::DropIndex::new()
  .raw_before(sql::DropIndexParams::DropIndex, raw)
  .drop_index("users_name_idx")
  .as_string();

Output

/* drop index command */ DROP INDEX users_name_idx

Trait Implementations

impl Clone for DropIndex

fn clone(&self) -> DropIndex

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DropIndex

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

Formats the value using the given formatter.

impl Default for DropIndex

fn default() -> DropIndex

Returns the “default value” for a type.

impl Display for DropIndex

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

Formats the value using the given formatter.