Number Data Types - ODBC Driver for Teradata

The Teradata Database Number data types are available in ODBC if supported by the database. A Teradata Database Number type is either Fixed or Floating.

Table 46: NUMBER Data Types 

Number variant	Database type	Description
Fixed Number	NUMBER (p, s)	Fixed decimal of p digits with s fractional digits
	NUMBER (p)	Equivalent to NUMBER(p, 0)
Floating Number	NUMBER (*, s)	Floating decimal of s fractional digits
	NUMBER (*)	Floating decimal
	NUMBER	Equivalent to NUMBER(*)

In ODBC the Number types are treated as standard SQL types. Fixed Number data types are mapped to the standard SQL_DECIMAL data type and Floating Number data types are mapped to SQL_DOUBLE. This means conforming applications do not need to know that the database type corresponding to an SQL_DECIMAL or SQL_DOUBLE is a Number data type.

If an application needs information indicating the database type is a Number type, then the application can examine the Teradata ODBC‑specific data type code. This code is returned as a descriptor field in SQLColAttribute and SQLGetDescField. Additionally, the code is returned as a Teradata-specific column in the result set from SQLGetTypeInfo, SQLColumns, and SQLProcedureColumns.

The Teradata ODBC‑specific data type codes are:

SQL_TD_FIXED_NUMBER for a Fixed Number

SQL_TD_FLOATING_NUMBER for a Floating Number

Note: The names SQL_TD_FIXED_NUMBER and SQL_TD_FLOATING_NUMBER are defined in the tdsql.h file. For more information, see “Teradata Extensions to the ODBC Standard” on page 100.