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[C++] strptime rolls-over dates not in range for current month  #31374

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[C++] strptime rolls-over dates not in range for current month #31374
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Component: C++Component: PythonComponent: RPriority: CriticalStatus: needs championHigh impact issues which aren't being worked on but require a volunteer to move the task forward.Type: bug

Description

@asfimport
asfimport
opened on Mar 16, 2022

I noticed some potentially unexpected behaviour when converting from string to date. Days that are out of bounds for the given month are rolled over into the following month.

I think the expected behaviour would be to either error (Python) or return NULL/NA (R), but not to roll over dates in the following month.

library(arrow, warn.conflicts=FALSE)
library(lubridate, warn.conflicts=FALSE)
library(dplyr, warn.conflicts=FALSE)
df<-tibble::tibble(string_date="1999-02-30")
# base R returns NAdf %>% mutate(date= strptime(string_date, format="%Y-%m-%d"))
#> # A tibble: 1 × 2#> string_date date #> <chr> <dttm>#> 1 1999-02-30 NA# arrow rolls over the 30th of February into the 2nd of Marchdf %>% arrow_table() %>% mutate(date= strptime(string_date, format="%Y-%m-%d")) %>% collect()
#> # A tibble: 1 × 2#> string_date date #> <chr> <dttm> #> 1 1999-02-30 1999-03-02 00:00:00

Thanks Alenka, Joris and Rok for helping me with the Python examples:
pandas:

>>>importpandasaspd>>>pd.to_datetime("1999-02-30", format="%Y-%m-%d")
...
ValueError: timedata1999-02-30doesn'tmatchformatspecified

datetime:

>>>importdatetime>>>fromdatetimeimportdatetime>>>datetime.strptime("1999-02-30", "%Y-%m-%d")
...
ValueError: dayisoutofrangeformonth

arrow:

>>>importpyarrow.computeaspc>>>print(pc.strptime("1999-02-30", format="%Y-%m-%d", unit="s"))
1999-03-0200:00:00

Reporter: Dragoș Moldovan-Grünfeld / @dragosmg
Watchers: Rok Mihevc / @rok

Related issues:

Note: This issue was originally created as ARROW-15948. Please see the migration documentation for further details.

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[C++] strptime rolls-over dates not in range for current month · Issue #31374 · apache/arrow · GitHub
      Skip to content
      [C++] strptime rolls-over dates not in range for current month  #31374
      Open
      Open
      [C++] strptime rolls-over dates not in range for current month #31374
      Labels
      Component: C++Component: PythonComponent: RPriority: CriticalStatus: needs championHigh impact issues which aren't being worked on but require a volunteer to move the task forward.Type: bug
      Description
      @asfimport
      asfimport
      opened on Mar 16, 2022
      I noticed some potentially unexpected behaviour when converting from string to date. Days that are out of bounds for the given month are rolled over into the following month.
      I think the expected behaviour would be to either error (Python) or return NULL/NA (R), but not to roll over dates in the following month.
      library(arrow, warn.conflicts=FALSE)
library(lubridate, warn.conflicts=FALSE)
library(dplyr, warn.conflicts=FALSE)
df<-tibble::tibble(string_date="1999-02-30")
# base R returns NAdf %>% mutate(date= strptime(string_date, format="%Y-%m-%d"))
#> # A tibble: 1 × 2#> string_date date #> <chr> <dttm>#> 1 1999-02-30 NA# arrow rolls over the 30th of February into the 2nd of Marchdf %>% arrow_table() %>% mutate(date= strptime(string_date, format="%Y-%m-%d")) %>% collect()
#> # A tibble: 1 × 2#> string_date date #> <chr> <dttm> #> 1 1999-02-30 1999-03-02 00:00:00
      Thanks Alenka, Joris and Rok for helping me with the Python examples:
      
pandas:
      >>>importpandasaspd>>>pd.to_datetime("1999-02-30", format="%Y-%m-%d")
...
ValueError: timedata1999-02-30doesn'tmatchformatspecified
      datetime:
      >>>importdatetime>>>fromdatetimeimportdatetime>>>datetime.strptime("1999-02-30", "%Y-%m-%d")
...
ValueError: dayisoutofrangeformonth
      arrow:
      >>>importpyarrow.computeaspc>>>print(pc.strptime("1999-02-30", format="%Y-%m-%d", unit="s"))
1999-03-0200:00:00
      Reporter: Dragoș Moldovan-Grünfeld / @dragosmg
      Watchers: Rok Mihevc / @rok
      Related issues:
      Note: This issue was originally created as ARROW-15948. Please see the migration documentation for further details.
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[C++] strptime rolls-over dates not in range for current month · Issue #31374 · apache/arrow · GitHub
          Skip to content
          [C++] strptime rolls-over dates not in range for current month  #31374
          Open
          Open
          [C++] strptime rolls-over dates not in range for current month #31374
          Labels
          Component: C++Component: PythonComponent: RPriority: CriticalStatus: needs championHigh impact issues which aren't being worked on but require a volunteer to move the task forward.Type: bug
          Description
          @asfimport
          asfimport
          opened on Mar 16, 2022
          I noticed some potentially unexpected behaviour when converting from string to date. Days that are out of bounds for the given month are rolled over into the following month.
          I think the expected behaviour would be to either error (Python) or return NULL/NA (R), but not to roll over dates in the following month.
          library(arrow, warn.conflicts=FALSE)
library(lubridate, warn.conflicts=FALSE)
library(dplyr, warn.conflicts=FALSE)
df<-tibble::tibble(string_date="1999-02-30")
# base R returns NAdf %>% mutate(date= strptime(string_date, format="%Y-%m-%d"))
#> # A tibble: 1 × 2#> string_date date #> <chr> <dttm>#> 1 1999-02-30 NA# arrow rolls over the 30th of February into the 2nd of Marchdf %>% arrow_table() %>% mutate(date= strptime(string_date, format="%Y-%m-%d")) %>% collect()
#> # A tibble: 1 × 2#> string_date date #> <chr> <dttm> #> 1 1999-02-30 1999-03-02 00:00:00
          Thanks Alenka, Joris and Rok for helping me with the Python examples:
          
pandas:
          >>>importpandasaspd>>>pd.to_datetime("1999-02-30", format="%Y-%m-%d")
...
ValueError: timedata1999-02-30doesn'tmatchformatspecified
          datetime:
          >>>importdatetime>>>fromdatetimeimportdatetime>>>datetime.strptime("1999-02-30", "%Y-%m-%d")
...
ValueError: dayisoutofrangeformonth
          arrow:
          >>>importpyarrow.computeaspc>>>print(pc.strptime("1999-02-30", format="%Y-%m-%d", unit="s"))
1999-03-0200:00:00
          Reporter: Dragoș Moldovan-Grünfeld / @dragosmg
          Watchers: Rok Mihevc / @rok
          Related issues:
          Note: This issue was originally created as ARROW-15948. Please see the migration documentation for further details.
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, 'i');
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[C++] strptime rolls-over dates not in range for current month · Issue #31374 · apache/arrow · GitHub
              Skip to content
              [C++] strptime rolls-over dates not in range for current month  #31374
              Open
              Open
              [C++] strptime rolls-over dates not in range for current month #31374
              Labels
              Component: C++Component: PythonComponent: RPriority: CriticalStatus: needs championHigh impact issues which aren't being worked on but require a volunteer to move the task forward.Type: bug
              Description
              @asfimport
              asfimport
              opened on Mar 16, 2022
              I noticed some potentially unexpected behaviour when converting from string to date. Days that are out of bounds for the given month are rolled over into the following month.
              I think the expected behaviour would be to either error (Python) or return NULL/NA (R), but not to roll over dates in the following month.
              library(arrow, warn.conflicts=FALSE)
library(lubridate, warn.conflicts=FALSE)
library(dplyr, warn.conflicts=FALSE)
df<-tibble::tibble(string_date="1999-02-30")
# base R returns NAdf %>% mutate(date= strptime(string_date, format="%Y-%m-%d"))
#> # A tibble: 1 × 2#> string_date date #> <chr> <dttm>#> 1 1999-02-30 NA# arrow rolls over the 30th of February into the 2nd of Marchdf %>% arrow_table() %>% mutate(date= strptime(string_date, format="%Y-%m-%d")) %>% collect()
#> # A tibble: 1 × 2#> string_date date #> <chr> <dttm> #> 1 1999-02-30 1999-03-02 00:00:00
              Thanks Alenka, Joris and Rok for helping me with the Python examples:
              
pandas:
              >>>importpandasaspd>>>pd.to_datetime("1999-02-30", format="%Y-%m-%d")
...
ValueError: timedata1999-02-30doesn'tmatchformatspecified
              datetime:
              >>>importdatetime>>>fromdatetimeimportdatetime>>>datetime.strptime("1999-02-30", "%Y-%m-%d")
...
ValueError: dayisoutofrangeformonth
              arrow:
              >>>importpyarrow.computeaspc>>>print(pc.strptime("1999-02-30", format="%Y-%m-%d", unit="s"))
1999-03-0200:00:00
              Reporter: Dragoș Moldovan-Grünfeld / @dragosmg
              Watchers: Rok Mihevc / @rok
              Related issues:
              Note: This issue was originally created as ARROW-15948. Please see the migration documentation for further details.
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var __re = new RegExp('^' + "youtube\\.com" + '
[C++] strptime rolls-over dates not in range for current month · Issue #31374 · apache/arrow · GitHub
                  Skip to content
                  [C++] strptime rolls-over dates not in range for current month  #31374
                  Open
                  Open
                  [C++] strptime rolls-over dates not in range for current month #31374
                  Labels
                  Component: C++Component: PythonComponent: RPriority: CriticalStatus: needs championHigh impact issues which aren't being worked on but require a volunteer to move the task forward.Type: bug
                  Description
                  @asfimport
                  asfimport
                  opened on Mar 16, 2022
                  I noticed some potentially unexpected behaviour when converting from string to date. Days that are out of bounds for the given month are rolled over into the following month.
                  I think the expected behaviour would be to either error (Python) or return NULL/NA (R), but not to roll over dates in the following month.
                  library(arrow, warn.conflicts=FALSE)
library(lubridate, warn.conflicts=FALSE)
library(dplyr, warn.conflicts=FALSE)
df<-tibble::tibble(string_date="1999-02-30")
# base R returns NAdf %>% mutate(date= strptime(string_date, format="%Y-%m-%d"))
#> # A tibble: 1 × 2#> string_date date #> <chr> <dttm>#> 1 1999-02-30 NA# arrow rolls over the 30th of February into the 2nd of Marchdf %>% arrow_table() %>% mutate(date= strptime(string_date, format="%Y-%m-%d")) %>% collect()
#> # A tibble: 1 × 2#> string_date date #> <chr> <dttm> #> 1 1999-02-30 1999-03-02 00:00:00
                  Thanks Alenka, Joris and Rok for helping me with the Python examples:
                  
pandas:
                  >>>importpandasaspd>>>pd.to_datetime("1999-02-30", format="%Y-%m-%d")
...
ValueError: timedata1999-02-30doesn'tmatchformatspecified
                  datetime:
                  >>>importdatetime>>>fromdatetimeimportdatetime>>>datetime.strptime("1999-02-30", "%Y-%m-%d")
...
ValueError: dayisoutofrangeformonth
                  arrow:
                  >>>importpyarrow.computeaspc>>>print(pc.strptime("1999-02-30", format="%Y-%m-%d", unit="s"))
1999-03-0200:00:00
                  Reporter: Dragoș Moldovan-Grünfeld / @dragosmg
                  Watchers: Rok Mihevc / @rok
                  Related issues:
                  Note: This issue was originally created as ARROW-15948. Please see the migration documentation for further details.
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[C++] strptime rolls-over dates not in range for current month · Issue #31374 · apache/arrow · GitHub
                      Skip to content
                      [C++] strptime rolls-over dates not in range for current month  #31374
                      Open
                      Open
                      [C++] strptime rolls-over dates not in range for current month #31374
                      Labels
                      Component: C++Component: PythonComponent: RPriority: CriticalStatus: needs championHigh impact issues which aren't being worked on but require a volunteer to move the task forward.Type: bug
                      Description
                      @asfimport
                      asfimport
                      opened on Mar 16, 2022
                      I noticed some potentially unexpected behaviour when converting from string to date. Days that are out of bounds for the given month are rolled over into the following month.
                      I think the expected behaviour would be to either error (Python) or return NULL/NA (R), but not to roll over dates in the following month.
                      library(arrow, warn.conflicts=FALSE)
library(lubridate, warn.conflicts=FALSE)
library(dplyr, warn.conflicts=FALSE)
df<-tibble::tibble(string_date="1999-02-30")
# base R returns NAdf %>% mutate(date= strptime(string_date, format="%Y-%m-%d"))
#> # A tibble: 1 × 2#> string_date date #> <chr> <dttm>#> 1 1999-02-30 NA# arrow rolls over the 30th of February into the 2nd of Marchdf %>% arrow_table() %>% mutate(date= strptime(string_date, format="%Y-%m-%d")) %>% collect()
#> # A tibble: 1 × 2#> string_date date #> <chr> <dttm> #> 1 1999-02-30 1999-03-02 00:00:00
                      Thanks Alenka, Joris and Rok for helping me with the Python examples:
                      
pandas:
                      >>>importpandasaspd>>>pd.to_datetime("1999-02-30", format="%Y-%m-%d")
...
ValueError: timedata1999-02-30doesn'tmatchformatspecified
                      datetime:
                      >>>importdatetime>>>fromdatetimeimportdatetime>>>datetime.strptime("1999-02-30", "%Y-%m-%d")
...
ValueError: dayisoutofrangeformonth
                      arrow:
                      >>>importpyarrow.computeaspc>>>print(pc.strptime("1999-02-30", format="%Y-%m-%d", unit="s"))
1999-03-0200:00:00
                      Reporter: Dragoș Moldovan-Grünfeld / @dragosmg
                      Watchers: Rok Mihevc / @rok
                      Related issues:
                      Note: This issue was originally created as ARROW-15948. Please see the migration documentation for further details.
                      Metadata
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                      No one assigned
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                        Type
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                          No branches or pull requests
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var __m = "*";
var __re = new RegExp('^' + ".*" + '
[C++] strptime rolls-over dates not in range for current month · Issue #31374 · apache/arrow · GitHub
                          Skip to content
                          [C++] strptime rolls-over dates not in range for current month  #31374
                          Open
                          Open
                          [C++] strptime rolls-over dates not in range for current month #31374
                          Labels
                          Component: C++Component: PythonComponent: RPriority: CriticalStatus: needs championHigh impact issues which aren't being worked on but require a volunteer to move the task forward.Type: bug
                          Description
                          @asfimport
                          asfimport
                          opened on Mar 16, 2022
                          I noticed some potentially unexpected behaviour when converting from string to date. Days that are out of bounds for the given month are rolled over into the following month.
                          I think the expected behaviour would be to either error (Python) or return NULL/NA (R), but not to roll over dates in the following month.
                          library(arrow, warn.conflicts=FALSE)
library(lubridate, warn.conflicts=FALSE)
library(dplyr, warn.conflicts=FALSE)
df<-tibble::tibble(string_date="1999-02-30")
# base R returns NAdf %>% mutate(date= strptime(string_date, format="%Y-%m-%d"))
#> # A tibble: 1 × 2#> string_date date #> <chr> <dttm>#> 1 1999-02-30 NA# arrow rolls over the 30th of February into the 2nd of Marchdf %>% arrow_table() %>% mutate(date= strptime(string_date, format="%Y-%m-%d")) %>% collect()
#> # A tibble: 1 × 2#> string_date date #> <chr> <dttm> #> 1 1999-02-30 1999-03-02 00:00:00
                          Thanks Alenka, Joris and Rok for helping me with the Python examples:
                          
pandas:
                          >>>importpandasaspd>>>pd.to_datetime("1999-02-30", format="%Y-%m-%d")
...
ValueError: timedata1999-02-30doesn'tmatchformatspecified
                          datetime:
                          >>>importdatetime>>>fromdatetimeimportdatetime>>>datetime.strptime("1999-02-30", "%Y-%m-%d")
...
ValueError: dayisoutofrangeformonth
                          arrow:
                          >>>importpyarrow.computeaspc>>>print(pc.strptime("1999-02-30", format="%Y-%m-%d", unit="s"))
1999-03-0200:00:00
                          Reporter: Dragoș Moldovan-Grünfeld / @dragosmg
                          Watchers: Rok Mihevc / @rok
                          Related issues:
                          Note: This issue was originally created as ARROW-15948. Please see the migration documentation for further details.
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[C++] strptime rolls-over dates not in range for current month · Issue #31374 · apache/arrow · GitHub
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                              [C++] strptime rolls-over dates not in range for current month  #31374
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                              [C++] strptime rolls-over dates not in range for current month #31374
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                              Component: C++Component: PythonComponent: RPriority: CriticalStatus: needs championHigh impact issues which aren't being worked on but require a volunteer to move the task forward.Type: bug
                              Description
                              @asfimport
                              asfimport
                              opened on Mar 16, 2022
                              I noticed some potentially unexpected behaviour when converting from string to date. Days that are out of bounds for the given month are rolled over into the following month.
                              I think the expected behaviour would be to either error (Python) or return NULL/NA (R), but not to roll over dates in the following month.
                              library(arrow, warn.conflicts=FALSE)
library(lubridate, warn.conflicts=FALSE)
library(dplyr, warn.conflicts=FALSE)
df<-tibble::tibble(string_date="1999-02-30")
# base R returns NAdf %>% mutate(date= strptime(string_date, format="%Y-%m-%d"))
#> # A tibble: 1 × 2#> string_date date #> <chr> <dttm>#> 1 1999-02-30 NA# arrow rolls over the 30th of February into the 2nd of Marchdf %>% arrow_table() %>% mutate(date= strptime(string_date, format="%Y-%m-%d")) %>% collect()
#> # A tibble: 1 × 2#> string_date date #> <chr> <dttm> #> 1 1999-02-30 1999-03-02 00:00:00
                              Thanks Alenka, Joris and Rok for helping me with the Python examples:
                              
pandas:
                              >>>importpandasaspd>>>pd.to_datetime("1999-02-30", format="%Y-%m-%d")
...
ValueError: timedata1999-02-30doesn'tmatchformatspecified
                              datetime:
                              >>>importdatetime>>>fromdatetimeimportdatetime>>>datetime.strptime("1999-02-30", "%Y-%m-%d")
...
ValueError: dayisoutofrangeformonth
                              arrow:
                              >>>importpyarrow.computeaspc>>>print(pc.strptime("1999-02-30", format="%Y-%m-%d", unit="s"))
1999-03-0200:00:00
                              Reporter: Dragoș Moldovan-Grünfeld / @dragosmg
                              Watchers: Rok Mihevc / @rok
                              Related issues:
                              Note: This issue was originally created as ARROW-15948. Please see the migration documentation for further details.
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                                Component: C++Component: PythonComponent: RPriority: CriticalStatus: needs championHigh impact issues which aren't being worked on but require a volunteer to move the task forward.Type: bug
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