Expanded class hierarchy of InsertQuery_pgsql

class \Query implements QueryPlaceholderInterface
- class \DeleteQuery implements QueryConditionInterface
- class \InsertQuery
  - class \InsertQuery_mysql
  - class \InsertQuery_pgsql
  - class \InsertQuery_sqlite
- class \MergeQuery implements QueryConditionInterface
- class \SelectQuery implements SelectQueryInterface
- class \TruncateQuery
- class \UpdateQuery implements QueryConditionInterface