|| An 8-byte character field that contains the string SQLDA as an identification of the SQLDA structure. This field helps in debugging when you are looking at memory contents.
|| A long integer containing the length of the SQLDA structure.
|| The number of variable descriptors allocated in the sqlvar array.
|| The number of variable descriptors that are valid (contain information describing a host variable). This field is set by
the DESCRIBE statement and sometimes by the programmer when supplying data to the database server.
|| An array of descriptors of type struct sqlvar, each describing a host variable.