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
342 def initialize(expression, sub)
343   @expression = expression
344   @sub = sub
345   freeze
346 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
356 def sequel_ast_transform(transformer)
357   self.class.new(transformer.call(@expression), transformer.call(@sub))
358 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
349 def to_s_append(ds, sql)
350   server_version = ds.db.server_version
351   frag = server_version && server_version >= 140000 ? SUBSCRIPT : HStoreOp::LOOKUP
352   ds.literal_append(sql, Sequel::SQL::PlaceholderLiteralString.new(frag, [@expression, @sub]))
353 end