SelectWithUnionQuery (children 1) ExpressionList (children 1) SelectQuery (children 4) ExpressionList (children 1) Function count (children 1) ExpressionList TablesInSelectQuery (children 2) TablesInSelectQueryElement (children 1) TableExpression (children 1) TableIdentifier test_table (alias t1) TablesInSelectQueryElement (children 2) TableExpression (children 1) Subquery (alias t2) (children 1) SelectWithUnionQuery (children 1) ExpressionList (children 1) SelectQuery (children 2) ExpressionList (children 1) Identifier number (alias id) TablesInSelectQuery (children 1) TablesInSelectQueryElement (children 1) TableExpression (children 1) Function numbers (children 1) ExpressionList (children 1) Literal UInt64_10 TableJoin (children 1) Function equals (children 1) ExpressionList (children 2) Identifier t1.id Identifier t2.id Function and (children 1) ExpressionList (children 3) Function equals (children 1) ExpressionList (children 2) Identifier t1.id Literal UInt64_1 Function equals (children 1) ExpressionList (children 2) Identifier t1.value_1 Literal \'1\' Function equals (children 1) ExpressionList (children 2) Identifier t1.value_2 Literal \'1\' Set