class Sequel::Postgres::HStoreSubscriptOp

Represents hstore subscripts. This is abstracted because the subscript support depends on the database version.

Constants

SUBSCRIPT

Attributes

expression[R]

The expression being subscripted

sub[R]

The subscript to use

Public Class Methods

new(expression, sub) click to toggle source

Set the expression and subscript to the given arguments

# File lib/sequel/extensions/pg_hstore_ops.rb, line 336
def initialize(expression, sub)
  @expression = expression
  @sub = sub
  freeze
end

Public Instance Methods

sequel_ast_transform(transformer) click to toggle source

Support transforming of hstore subscripts

# File lib/sequel/extensions/pg_hstore_ops.rb, line 350
def sequel_ast_transform(transformer)
  self.class.new(transformer.call(@expression), transformer.call(@sub))
end
to_s_append(ds, sql) click to toggle source

Use subscripts instead of -> operator on PostgreSQL 14+

# File lib/sequel/extensions/pg_hstore_ops.rb, line 343
def to_s_append(ds, sql)
  server_version = ds.db.server_version
  frag = server_version && server_version >= 140000 ? SUBSCRIPT : HStoreOp::LOOKUP
  ds.literal_append(sql, Sequel::SQL::PlaceholderLiteralString.new(frag, [@expression, @sub]))
end