class SQLite3::Database::FunctionProxy

A helper class for dealing with custom functions (see #create_function, #create_aggregate, and #create_aggregate_handler). It encapsulates the opaque function object that represents the current invocation. It also provides more convenient access to the API functions that operate on the function object.

This class will almost always be instantiated indirectly, by working with the create methods mentioned above.

Attributes

result [RW]

Public Class Methods

new ()

Source

# File lib/sqlite3/database.rb, line 769
def initialize
  @result = nil
  @context = {}
end

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.

Public Instance Methods

[] (key)

Source

# File lib/sqlite3/database.rb, line 776
def [](key)
  @context[key]
end

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

[]= (key, value)

Source

# File lib/sqlite3/database.rb, line 782
def []=(key, value)
  @context[key] = value
end

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