Module diesel::dsl

source ·
Expand description

Includes various helper types and bare functions which are named too generically to be included in prelude, but are often used when using Diesel.

Structs

  • CountDistinct
  • CountStar
  • now
    Represents the SQL CURRENT_TIMESTAMP constant. This is equivalent to the NOW() function on backends that support it.
  • today
    Represents the SQL CURRENT_DATE constant.

Functions

  • avg
    Represents a SQL AVG function. This function can only take types which are Foldable.
  • count
    Creates a SQL COUNT expression
  • count_distinct
    Creates a SQL COUNT(DISTINCT ...) expression
  • count_star
    Creates a SQL COUNT(*) expression
  • date
    Represents the SQL DATE function. The argument should be a Timestamp expression, and the return value will be an expression of type Date.
  • delete
    Creates a DELETE statement.
  • exists
    Creates a SQL EXISTS expression.
  • insert_into
    Creates an INSERT statement for the target table.
  • insert_or_ignore_into
    Creates an INSERT [OR] IGNORE statement.
  • max
    Represents a SQL MAX function. This function can only take types which are ordered.
  • min
    Represents a SQL MIN function. This function can only take types which are ordered.
  • not
    Creates a SQL NOT expression
  • replace_into
    Creates a REPLACE statement.
  • select
    Creates a bare select statement, with no from clause. Primarily used for testing diesel itself, but likely useful for third party crates as well. The given expressions must be selectable from anywhere.
  • sql
    Use literal SQL in the query builder.
  • sql_query
    Construct a full SQL query using raw SQL.
  • sum
    Represents a SQL SUM function. This function can only take types which are Foldable.
  • update
    Creates an UPDATE statement.

Type Definitions