types.md
In duckdb: DBI Package for the DuckDB Database Management System

test_all_types() output

Code
  as.list(dbGetQuery(con,
    "SELECT * EXCLUDE (timestamp_tz, time_tz, timestamp_ns, timestamp_array, timestamptz_array, map, bit, \"union\") REPLACE(replace(varchar, chr(0), '') AS varchar) FROM test_all_types(use_large_enum=true)"))
Output
  $bool
  [1] FALSE  TRUE    NA

  $tinyint
  [1] -128  127   NA

  $smallint
  [1] -32768  32767     NA

  $int
  [1]         NA 2147483647         NA

  $bigint
  [1] -9.223372e+18  9.223372e+18            NA

  $hugeint
  [1] -1.701412e+38  1.701412e+38            NA

  $utinyint
  [1]   0 255  NA

  $usmallint
  [1]     0 65535    NA

  $uint
  [1]          0 4294967295         NA

  $ubigint
  [1] 0.000000e+00 1.844674e+19           NA

  $date
  [1] "-5877641-06-25" "5881580-07-10"  NA

  $time
  Time differences in secs
  [1]     0 86399    NA

  $timestamp
  [1] "-290308-12-22 00:00:00.00000 UTC" "294247-01-10 04:00:54.77539 UTC" 
  [3] NA

  $timestamp_s
  [1] "-290308-12-22 00:00:00 UTC" "294247-01-10 04:00:54 UTC" 
  [3] NA

  $timestamp_ms
  [1] "-290308-12-22 00:00:00.00000 UTC" "294247-01-10 04:00:54.77539 UTC" 
  [3] NA

  $float
  [1] -3.402823e+38  3.402823e+38            NA

  $double
  [1] -1.797693e+308  1.797693e+308             NA

  $dec_4_1
  [1] -999.9  999.9     NA

  $dec_9_4
  [1] -1e+05  1e+05     NA

  $dec_18_6
  [1] -1e+12  1e+12     NA

  $dec38_10
  [1] -1e+28  1e+28     NA

  $uuid
  [1] "00000000-0000-0000-0000-000000000001"
  [2] "ffffffff-ffff-ffff-ffff-ffffffffffff"
  [3] NA

  $interval
  Time differences in secs
  [1]          0 2675722599         NA

  $varchar
  [1] "🦆🦆🦆🦆🦆🦆" "goose"        NA

  $blob
  $blob[[1]]
   [1] 74 68 69 73 69 73 61 6c 6f 6e 67 62 6c 6f 62 00 77 69 74 68 6e 75 6c 6c 62
  [26] 79 74 65 73

  $blob[[2]]
  [1] 00 00 00 61

  $blob[[3]]
  NULL


  $small_enum
  [1] DUCK_DUCK_ENUM GOOSE          <NA>          
  Levels: DUCK_DUCK_ENUM GOOSE

  $medium_enum
  [1] enum_0   enum_299 <NA>    
  300 Levels: enum_0 enum_1 enum_2 enum_3 enum_4 enum_5 enum_6 enum_7 ... enum_299

  $large_enum
  [1] enum_0 enum_0 <NA>  
  70000 Levels: enum_0 enum_1 enum_2 enum_3 enum_4 enum_5 enum_6 enum_7 ... enum_69999

  $int_array
  $int_array[[1]]
  integer(0)

  $int_array[[2]]
  [1]  42 999  NA  NA -42

  $int_array[[3]]
  NULL


  $double_array
  $double_array[[1]]
  numeric(0)

  $double_array[[2]]
  [1]   42  NaN  Inf -Inf   NA  -42

  $double_array[[3]]
  NULL


  $date_array
  $date_array[[1]]
  Date of length 0

  $date_array[[2]]
  [1] "1970-01-01"     "5881580-07-11"  "-5877641-06-24" NA              
  [5] "2022-05-12"

  $date_array[[3]]
  NULL


  $varchar_array
  $varchar_array[[1]]
  character(0)

  $varchar_array[[2]]
  [1] "🦆🦆🦆🦆🦆🦆" "goose"        NA             ""

  $varchar_array[[3]]
  NULL


  $nested_int_array
  $nested_int_array[[1]]
  list()

  $nested_int_array[[2]]
  $nested_int_array[[2]][[1]]
  integer(0)

  $nested_int_array[[2]][[2]]
  [1]  42 999  NA  NA -42

  $nested_int_array[[2]][[3]]
  NULL

  $nested_int_array[[2]][[4]]
  integer(0)

  $nested_int_array[[2]][[5]]
  [1]  42 999  NA  NA -42


  $nested_int_array[[3]]
  NULL


  $struct
     a            b
  1 NA         <NA>
  2 42 🦆🦆🦆🦆🦆🦆
  3 NA         <NA>

  $struct_of_arrays
                       a                         b
  1                 NULL                      NULL
  2 42, 999, NA, NA, -42 🦆🦆🦆🦆🦆🦆, goose, NA, 
  3                 NULL                      NULL

  $array_of_structs
  $array_of_structs[[1]]
  [1] a b
  <0 rows> (or 0-length row.names)

  $array_of_structs[[2]]
     a            b
  1 NA         <NA>
  2 42 🦆🦆🦆🦆🦆🦆
  3 NA         <NA>

  $array_of_structs[[3]]
  NULL