SQLLiteral

public struct SQLLiteral
extension SQLLiteral: ExpressibleByStringInterpolation

SQLLiteral is a type which support SQL Interpolation.

For example:

try dbQueue.write { db in
    let name: String = ...
    let id: Int64 = ...
    let query: SQLLiteral = "UPDATE player SET name = \(name) WHERE id = \(id)"
    try db.execute(literal: query)
}
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  • Creates an SQLLiteral from a plain SQL string, and eventual arguments.

    For example:

    let query = SQLLiteral(
    sql: "UPDATE player SET name = ? WHERE id = ?",
    arguments: [name, id])

    Declaration

    Swift

    public init(sql: String, arguments: StatementArguments = StatementArguments())
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  • Creates an SQLLiteral from an SQL expression.

    For example:

    let columnLiteral = SQLLiteral(Column("username"))
let suffixLiteral = SQLLiteral("@example.com".databaseValue)
let emailLiteral = [columnLiteral, suffixLiteral].joined(separator: " || ")
let request = User.select(emailLiteral.sqlExpression)
let emails = try String.fetchAll(db, request)

    Declaration

    Swift

    public init(_ expression: SQLExpression)
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  • Returns true if this literal generates an empty SQL string

    Declaration

    Swift

    public var isEmpty: Bool { get }
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  • Turn a SQLLiteral into raw SQL and arguments.

    Declaration

    Swift

    public func build(_ db: Database) throws -> (sql: String, arguments: StatementArguments)

    Parameters

    db

    A database connection.

    Return Value

    A tuple made of a raw SQL string, and statement arguments.

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  • Returns the SQLLiteral produced by the concatenation of two literals.

    let name = "O'Brien"
let selection: SQLLiteral = "SELECT * FROM player "
let condition: SQLLiteral = "WHERE name = \(name)"
let query = selection + condition

    Declaration

    Swift

    public static func + (lhs: SQLLiteral, rhs: SQLLiteral) -> SQLLiteral
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  • Appends an SQLLiteral to the receiver.

    let name = "O'Brien"
var query: SQLLiteral = "SELECT * FROM player "
query += "WHERE name = \(name)"

    Declaration

    Swift

    public static func += (lhs: inout SQLLiteral, rhs: SQLLiteral)
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  • Appends an SQLLiteral to the receiver.

    let name = "O'Brien"
var query: SQLLiteral = "SELECT * FROM player "
query.append(literal: "WHERE name = \(name)")

    Declaration

    Swift

    public mutating func append(literal sqlLiteral: SQLLiteral)
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  • Appends a plain SQL string to the receiver, and eventual arguments.

    let name = "O'Brien"
var query: SQLLiteral = "SELECT * FROM player "
query.append(sql: "WHERE name = ?", arguments: [name])

    Declaration

    Swift

    public mutating func append(sql: String, arguments: StatementArguments = StatementArguments())
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  • Creates a literal SQL expression.

    SQLLiteral(sql: "1 + 2").sqlExpression
SQLLiteral(sql: "? + ?", arguments: [1, 2]).sqlExpression
SQLLiteral(sql: ":one + :two", arguments: ["one": 1, "two": 2]).sqlExpression

    Declaration

    Swift

    public var sqlExpression: SQLExpression { get }
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ExpressibleByStringInterpolation