RowAdapter

RowAdapter is a protocol that helps two incompatible row interfaces working together.

GRDB ships with four concrete types that adopt the RowAdapter protocol:

• ColumnMapping: renames row columns
• EmptyRowAdapter: hides all columns
• RangeRowAdapter: exposes a range of columns
• RenameColumnAdapter: transforms column names with a function
• ScopeAdapter: defines row scopes
• SuffixRowAdapter: hides the first columns of a row

To use a row adapter, provide it to any method that fetches:

let adapter = SuffixRowAdapter(fromIndex: 2)
let sql = "SELECT 1 AS foo, 2 AS bar, 3 AS baz"

// [baz:3]
try Row.fetchOne(db, sql: sql, adapter: adapter)