我有一个带有时间戳(无时区)的数据库,我想在使用collect()
. 到目前为止,我已经尝试过这些:
db_tbl %>% mutate_if(lubridate::is.timepoint, funs(CAST))
但是,我不知道如何添加AS timestamptz
到这个函数调用
它给了我:
Error in result_create(conn@ptr, statement) :
Failed to prepare query: ERROR: syntax error at or near ")"
LINE 1: SELECT "user_id", "time_zone", CAST("confirmed_at") AS "conf...
和
db_tbl %>% mutate_if(lubridate::is.timepoint, funs(sql(paste0(., "::timestamptz"))))
但是,我不知道如何paste0()
执行而不是被翻译成CONCAT
:它给了我:
Applying predicate on the first 100 rows
<SQL>
SELECT "user_id", "time_zone", CONCAT_WS('', "confirmed_at", '::timestamptz') AS "confirmed_at"
FROM (SELECT "user_id", "time_zone", "confirmed_at"
FROM app.app_users) "paiaayosfl"
最终,我试图在没有 R 假设我的本地时区的情况下提取时间戳。