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)
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Set the expression and subscript to the given arguments
# File lib/sequel/extensions/pg_hstore_ops.rb 337 def initialize(expression, sub) 338 @expression = expression 339 @sub = sub 340 freeze 341 end
Public Instance Methods
sequel_ast_transform(transformer)
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Support transforming of hstore subscripts
# File lib/sequel/extensions/pg_hstore_ops.rb 351 def sequel_ast_transform(transformer) 352 self.class.new(transformer.call(@expression), transformer.call(@sub)) 353 end
to_s_append(ds, sql)
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Use subscripts instead of -> operator on PostgreSQL 14+
# File lib/sequel/extensions/pg_hstore_ops.rb 344 def to_s_append(ds, sql) 345 server_version = ds.db.server_version 346 frag = server_version && server_version >= 140000 ? SUBSCRIPT : HStoreOp::LOOKUP 347 ds.literal_append(sql, Sequel::SQL::PlaceholderLiteralString.new(frag, [@expression, @sub])) 348 end