px_get_schema() returns the database schema.
Resource identifier of the paradox database as returned by px_new().
If the optional mode is
PX_KEYTOUPPER the keys of the returned array
will be converted to lower
or upper case. If mode is 0 or not passed at all,
then the key name will be identical to the field name.
Returns the schema of a database file as an associated array. The key name
is equal to the field name. Each array element is itself an associated
array containing the two fields
type is one of the constants in
table Constants for field
size is the number of bytes this field
consumes in the record. The total of all field sizes is equal to the
record size as it can be retrieved with px-get-info().