Module: PgQuery::Deparse::Rename

Defined in:
lib/pg_query/deparse/rename.rb

Constant Summary collapse

RENAME_MAPPING = 
{
  OBJECT_TYPE_CONVERSION       => ->(_node) { %w[CONVERSION object RENAME] },
  OBJECT_TYPE_TABLE            => ->(_node) { %w[TABLE relation RENAME] },
  OBJECT_TYPE_TABCONSTRAINT    => ->(_node) { %w[TABLE relation RENAME CONSTRAINT subname] },
  OBJECT_TYPE_INDEX            => ->(_node) { %w[INDEX relation RENAME] },
  OBJECT_TYPE_MATVIEW          => ->(_node) { ['MATERIALIZED VIEW', 'relation', 'RENAME'] },
  OBJECT_TYPE_TABLESPACE       => ->(_node) { %w[TABLESPACE subname RENAME] },
  OBJECT_TYPE_VIEW             => ->(_node) { %w[VIEW relation RENAME] },
  OBJECT_TYPE_COLUMN           => ->(_node) { %w[TABLE relation RENAME COLUMN subname] },
  OBJECT_TYPE_COLLATION        => ->(_node) { %w[COLLATION object RENAME] },
  OBJECT_TYPE_TYPE             => ->(_node) { %w[TYPE object RENAME] },
  OBJECT_TYPE_DOMCONSTRAINT    => ->(_node) { %w[DOMAIN object RENAME CONSTRAINT subname] },
  OBJECT_TYPE_RULE             => ->(_node) { %w[RULE subname ON relation RENAME] },
  OBJECT_TYPE_TRIGGER          => ->(_node) { %w[TRIGGER subname ON relation RENAME] },
  OBJECT_TYPE_AGGREGATE        => ->(_node) { %w[AGGREGATE object RENAME] },
  OBJECT_TYPE_FUNCTION         => ->(_node) { %w[FUNCTION object RENAME] }
}.freeze

Class Method Summary collapse

Class Method Details

.commands(node) ⇒ Object

relation, subname and object is the array key in the node. Array return five value. First is the type like a TRIGGER, TABLE, DOMAIN Other values may be parameter or SQL key.

If node is the integer 13 (OBJECT_TYPE_DOMCONSTRAINT), then return value of this method will be:

%w[DOMAIN object RENAME CONSTRAINT subname]

Which will be composed into the SQL as:

ALTER {type} {name} RENAME CONSTRAINT {subname} TO {newname}



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# File 'lib/pg_query/deparse/rename.rb', line 17

def self.commands(node)
  action = RENAME_MAPPING[node['renameType']] || raise(format("Can't deparse: %s", node.inspect))
  PgQuery::Deparse.instance_exec(node, &action)
end