SelectWithUnionQuery (children 1) ExpressionList (children 1) SelectQuery (children 2) ExpressionList (children 1) QualifiedAsterisk (children 1) Identifier f TablesInSelectQuery (children 1) TablesInSelectQueryElement (children 1) TableExpression (children 1) Function format (alias f) (children 1) ExpressionList (children 2) Literal \'CSV\' Literal \'1,2,"[1,2,3]","[[\\\'abc\\\'], [], [\\\'d\\\', \\\'e\\\']]"\'