PGModel Query class hierarchy

gistfile1.txt

_QueryExpression (interface)
 |
 | - _QueryFunction (interface)
 |
 | - _QueryTableExpression (interface)
 |
 | - _QueryValueExpression (interface)


_QueryAliasableExpression (abstract, implements _QueryExpression)
 |
 | - _QueryTable (implements _QueryTableExpression)
 |
 | - _QuerySetFunction (implements _QueryTableExpression, _QueryFunction)
 |
 | - Query (implements _QueryTableExpression)
 |    |
 |    |- _QueryCTE
 |
 | - _QueryIdentifier (implements _QueryTableExpression, _QueryValueExpression)
 |    |
 |    |- _QueryQualifiedIdentifier
 |    |
 |    |- _QueryAlias
 |
 | - _QueryString (implements _QueryValueExpression)
 |
 | - _QueryValueFunction (implements _QueryValueExpression, _QueryFunction)

_QueryJoinExpression (implements _QueryTableExpression)

_QueryLiteralExpression (implements _QueryTableExpression, _QueryValueExpression)

_QuerySetModifyingExpression (abstract, implements _QueryExpression)
 |
 | - _QueryConditionalExpression
 |
 | - _QueryLimitingExpression
 |
 | - _QueryOrderingExpression