SelectWithUnionQuery (children 1) ExpressionList (children 1) SelectQuery (children 2) ExpressionList (children 1) Function toDateTime64 (alias x) (children 1) ExpressionList (children 3) Literal \'2019-09-16 19:20:12.345678910\' Literal UInt64_6 Literal \'Asia/Istanbul\' ExpressionList (children 5) Function materialize (alias dt64) (children 1) ExpressionList (children 1) Identifier x Function toUnixTimestamp64Second (children 1) ExpressionList (children 1) Identifier dt64 Function toUnixTimestamp64Milli (children 1) ExpressionList (children 1) Identifier dt64 Function toUnixTimestamp64Micro (children 1) ExpressionList (children 1) Identifier dt64 Function toUnixTimestamp64Nano (children 1) ExpressionList (children 1) Identifier dt64