# Functions
Parse parses the given SQL sentence and returns the corresponding node.
# Variables
ErrInvalidSortOrder is returned when a sort order is not valid.
ErrInvalidSQLValType is returned when a SQLVal type is not valid.
ErrUnsupportedFeature is thrown when a feature is not already supported.
ErrUnsupportedSubqueryExpression is thrown because subqueries are not supported, yet.
ErrUnsupportedSyntax is thrown when a specific syntax is not already supported.