### - h -

- HAVE_PRECISION : DataType
- HAVE_SCALE : DataType
- HAVE_SIZE : DataType
- HAVE_TIMEZONE : DataType
- HAVING_STATE : OqlSelectParser
- HEAD : HttpMethod
- HEADER_ACCEPT : OpenIdCredentials
- HEADER_CONT_TYPE : OpenIdCredentials
- HEADER_XRDS_LOCATION : OpenIdCredentials
- HELD_CURSOR_REQUIRES_SAME_ISOLATION_LEVEL : PostgresError
- HOUR : DatePart
- HOURS : PrimitiveTimestamp , PrimitiveTime
- HTML : FeedItemContentType