Expanded class hierarchy of UpdateQuery_pgsql

class \Query implements QueryPlaceholderInterface
- class \DeleteQuery implements QueryConditionInterface
- class \InsertQuery
- class \MergeQuery implements QueryConditionInterface
- class \SelectQuery implements SelectQueryInterface
- class \TruncateQuery
- class \UpdateQuery implements QueryConditionInterface
  - class \UpdateQuery_pgsql
  - class \UpdateQuery_sqlite