v0.3.0

A RAW reports its length, and a decimal of another package binds and scans.

go get github.com/xo/oracle@v0.3.0

New

• sql.ColumnType.Length() gives the declared length of a RAW in bytes,
  so SYS_GUID() and a RAW(16) column give 16. A caller can tell a
  RAW(16), which holds a GUID, from another RAW. A VARCHAR2,
  NVARCHAR2, CHAR and NCHAR give their length in characters. A
  LONG, LONG RAW, CLOB, NCLOB, BLOB and BFILE give
  math.MaxInt64, as database/sql asks for a type with no limit.
  NUMBER, DATE and the other types of fixed length give none. v0.2.0
  gave a length for the string types only.
• A decimal of another package binds as a NUMBER, and scans from one with
  every digit, when it has the Decompose and Compose methods that
  database/sql uses to pass a decimal as its parts. This holds for an
  argument, an attribute of an object, and an OUT or IN OUT of PL/SQL. A
  nil one binds as a NULL. v0.2.0 failed to bind such a decimal with "no
  parameter coder registered", and failed to scan into one.

The API of v0.2.0 is unchanged.