SQLite::Database::FunctionProxy

Create a new FunctionProxy that encapsulates the given func object. If context is non-nil, the functions context will be set to that. If it is non-nil, it must quack like a Hash. If it is nil, then none of the context functions will be available.

# File lib/sqlite/database.rb, line 628
def initialize( func, context=nil )
  @func = func
  @context = context
end

Returns the value with the given key from the context. This is only available to aggregate functions.

# File lib/sqlite/database.rb, line 655
def []( key )
  ensure_aggregate!
  @context[ key ]
end

Sets the value with the given key in the context. This is only available to aggregate functions.

# File lib/sqlite/database.rb, line 662
def []=( key, value )
  ensure_aggregate!
  @context[ key ] = value
end

(Only available to aggregate functions.) Returns the number of rows that the aggregate has processed so far. This will include the current row, and so will always return at least 1.

# File lib/sqlite/database.rb, line 648
def count
  ensure_aggregate!
  SQLite::API.aggregate_count( @func )
end

Set the result of the function to the given error message, which must be a string. The function will then return that error.

# File lib/sqlite/database.rb, line 641
def set_error( error )
  SQLite::API.set_result_error( @func, error )
end

Set the result of the function to the given value. The function will then return this value.

# File lib/sqlite/database.rb, line 635
def set_result( result )
  SQLite::API.set_result( @func, result )
end