The type codes shown in SQLDA Record Usage (see page SQLDA Record Usage) in this chapter are the types that describe Ingres result fields or columns. For example, the SQL types date and money do not describe a program variable, but rather data types that are compatible with the Pascal character and numeric types. IISQ_LVCH_TYPE is SQL only character compatible too. When these types are returned by the describe statement, the type code must be a change to a compatible Pascal or ESQL/Pascal type.

The following table describes the type codes to use with Pascal variables that will be pointed at by the sqldata pointers.

Nullable data types (those variables that are associated with a null indicator) are specified by assigning the negative of the type code to the sqltype component. If the type is negative, a null indicator must be pointed at by the sqlind component. The type of the null indicator must be a 2-byte integer (or the SQL-defined indicator type). For information on how to declare and use a null indicator variable in Pascal, see Pascal Variables and Data Types (see page Pascal Variables and Data Types) in this chapter.

Character data and the SQLDA have the exact same rules as character data in regular Embedded SQL statements. For details of character string processing in SQL, see Pascal Variables and Data Types (see page Pascal Variables and Data Types) in this chapter.