def __init__(self, dbconn=None, single_db=False):
"""Initialize the various DbObjectDict-derived dictionaries
:param dbconn: a DbConnection object
"""
self.schemas = SchemaDict(dbconn)
self.extensions = ExtensionDict(dbconn)
self.languages = LanguageDict(dbconn)
self.casts = CastDict(dbconn)
self.types = TypeDict(dbconn)
self.tables = ClassDict(dbconn)
self.columns = ColumnDict(dbconn)
self.constraints = ConstraintDict(dbconn)
self.indexes = IndexDict(dbconn)
self.functions = ProcDict(dbconn)
self.operators = OperatorDict(dbconn)
self.operclasses = OperatorClassDict(dbconn)
self.operfams = OperatorFamilyDict(dbconn)
self.rules = RuleDict(dbconn)
self.triggers = TriggerDict(dbconn)
self.conversions = ConversionDict(dbconn)
self.tstempls = TSTemplateDict(dbconn)
self.tsdicts = TSDictionaryDict(dbconn)
self.tsparsers = TSParserDict(dbconn)
self.tsconfigs = TSConfigurationDict(dbconn)
self.fdwrappers = ForeignDataWrapperDict(dbconn)
self.servers = ForeignServerDict(dbconn)
self.usermaps = UserMappingDict(dbconn)
self.ftables = ForeignTableDict(dbconn)
self.collations = CollationDict(dbconn)
self.eventtrigs = EventTriggerDict(dbconn)
# Populate a map from system catalog to the respective dict
self._catalog_map = {}
for _, d in self.all_dicts(single_db):
if d.cls.catalog is not None:
self._catalog_map[d.cls.catalog] = d
# Map from objects extkey to their (dict name, key)
self._extkey_map = {}