px_get_schema -- Returns the database schema Description
Returns the schema of a database file as an associated array. The key
name is equal to the field name. If mode is
PX_KEYTOLOWER or PX_KEYTOUPPER the key 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. Each array
element is itself an associated array containing the two fields
'type' and 'size'. 'type' is one of the constants in table Constants for field types.
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