Issues in SQLSetDescField & SQLGetDescField functions

[Hunaid2000]

• No consistency checks are performed in SQLSetDescField & SQLGetDescField functions.

• A call to SQLSetDescField function with field SQL_DESC_TYPE should set some fields to default values.

• Some descriptor fields are R/W according to API reference but throws error when set/get is called for them.

Example from ARDSetField that is used inside SQLSetDescField function:

psqlodbc/pgapi30.c

Lines 636 to 641 in 7ec2337

	case SQL_DESC_DATETIME_INTERVAL_PRECISION:
	case SQL_DESC_LENGTH:
	case SQL_DESC_NUM_PREC_RADIX:
	default:ret = SQL_ERROR;
	DC_set_error(desc, DESC_INVALID_DESCRIPTOR_IDENTIFIER,
	"invalid descriptor identifier");