backend-dbplyr__duckdb_connection.md
In duckdb: DBI Package for the DuckDB Database Management System

snapshots of dbplyr generic scalar translation

Code
  translate(as.character(1))
Output
  <SQL> CAST(1.0 AS TEXT)
Code
  translate(as.character(1L))
Output
  <SQL> CAST(1 AS TEXT)
Code
  translate(as.numeric(1))
Output
  <SQL> CAST(1.0 AS NUMERIC)
Code
  translate(as.double(1.2))
Output
  <SQL> CAST(1.2 AS NUMERIC)
Code
  translate(as.integer(1.2))
Output
  <SQL> CAST(1.2 AS INTEGER)
Code
  translate(as.integer64(1.2))
Output
  <SQL> CAST(1.2 AS BIGINT)
Code
  translate(as.logical("TRUE"))
Output
  <SQL> CAST('TRUE' AS BOOLEAN)
Code
  translate(tolower("HELLO"))
Output
  <SQL> LOWER('HELLO')
Code
  translate(toupper("hello"))
Output
  <SQL> UPPER('hello')
Code
  translate(pmax(1, 2, na.rm = TRUE))
Output
  <SQL> GREATEST(1.0, 2.0)
Code
  translate(pmin(1, 2, na.rm = TRUE))
Output
  <SQL> LEAST(1.0, 2.0)
Code
  translate(as.character("2020-01-01"))
Output
  <SQL> CAST('2020-01-01' AS TEXT)
Code
  translate(c("2020-01-01", "2020-13-02"))
Output
  <SQL> ('2020-01-01', '2020-13-02')
Code
  translate(iris[["sepal_length"]])
Output
  <SQL> iris.sepal_length
Code
  translate(iris[[1]])
Output
  <SQL> iris[1]
Code
  translate(cot(x))
Output
  <SQL> COT(x)
Code
  translate(substr("test", 2, 3))
Output
  <SQL> SUBSTR('test', 2, 2)

snapshots of duckdb custom scalars translations

Code
  translate(as.raw(10))
Output
  <SQL> CAST(10.0 AS VARBINARY)
Code
  translate(13 %% 5)
Output
  <SQL> FMOD(13.0, 5.0)
Code
  translate(35.8 %/% 4)
Output
  <SQL> FDIV(35.8, 4.0)
Code
  translate(35.8^2.51)
Output
  <SQL> POW(35.8, 2.51)
Code
  translate(bitwOr(x, 128L))
Output
  <SQL> (CAST(x AS INTEGER)) | (CAST(128 AS INTEGER))
Code
  translate(bitwAnd(x, 128))
Output
  <SQL> (CAST(x AS INTEGER)) & (CAST(128.0 AS INTEGER))
Code
  translate(bitwXor(x, 128L))
Output
  <SQL> XOR((CAST(x AS INTEGER)), (CAST(128 AS INTEGER)))
Code
  translate(bitwNot(x))
Output
  <SQL> ~(CAST(x AS INTEGER))
Code
  translate(bitwShiftL(x, 5L))
Output
  <SQL> (CAST(x AS INTEGER)) << (CAST(5 AS INTEGER))
Code
  translate(bitwShiftR(x, 4L))
Output
  <SQL> (CAST(x AS INTEGER)) >> (CAST(4 AS INTEGER))
Code
  translate(log(x))
Output
  <SQL> LN(x)
Code
  translate(log(x, base = 5))
Output
  <SQL> LOG(x) / LOG(5.0)
Code
  translate(log(x, base = 10))
Output
  <SQL> LOG10(x)
Code
  translate(log(x, base = 2))
Output
  <SQL> LOG2(x)
Code
  translate(log10(x))
Output
  <SQL> LOG10(x)
Code
  translate(log2(x))
Output
  <SQL> LOG2(x)
Code
  translate(is.nan(var1))
Output
  <SQL> (var1 IS NOT NULL AND PRINTF('%f', var1) = 'nan')
Code
  translate(is.infinite(var1))
Output
  <SQL> (var1 IS NOT NULL AND REGEXP_MATCHES(PRINTF('%f', var1), 'inf'))
Code
  translate(is.finite(var1))
Output
  <SQL> (NOT (var1 IS NULL OR REGEXP_MATCHES(PRINTF('%f', var1), 'inf|nan')))
Code
  translate(grepl("pattern", text))
Output
  <SQL> REGEXP_MATCHES("text", 'pattern')
Code
  translate(grepl("pattern", text, ignore.case = TRUE))
Output
  <SQL> REGEXP_MATCHES("text", '(?i)pattern')
Code
  translate(regexpr("pattern", text))
Output
  <SQL> (CASE WHEN REGEXP_MATCHES("text", 'pattern') THEN (LENGTH(LIST_EXTRACT(STRING_SPLIT_REGEX("text", 'pattern'), 0))+1) ELSE -1 END)
Code
  translate(round(x, digits = 1.1))
Output
  <SQL> ROUND_EVEN(x, CAST(ROUND(1.1, 0) AS INTEGER))
Code
  translate(as.Date("2019-01-01"))
Output
  <SQL> CAST('2019-01-01' AS DATE)
Code
  translate(as.POSIXct("2019-01-01 01:01:01"))
Output
  <SQL> CAST('2019-01-01 01:01:01' AS TIMESTAMP)

snapshot tests for pasting translate

Code
  translate(paste("hi", "bye"))
Output
  <SQL> CONCAT_WS(' ', 'hi', 'bye')
Code
  translate(paste("hi", "bye", sep = "-"))
Output
  <SQL> CONCAT_WS('-', 'hi', 'bye')
Code
  translate(paste0("hi", "bye"))
Output
  <SQL> CONCAT_WS('', 'hi', 'bye')
Code
  translate(paste(x, y), window = FALSE)
Output
  <SQL> CONCAT_WS(' ', x, y)
Code
  translate(paste0(x, y), window = FALSE)
Output
  <SQL> CONCAT_WS('', x, y)

snapshots for custom lubridate functions translated correctly

Code
  translate(yday(x))
Output
  <SQL> EXTRACT(DOY FROM x)
Code
  translate(quarter(x))
Output
  <SQL> EXTRACT(QUARTER FROM x)
Code
  translate(quarter(x))
Output
  <SQL> EXTRACT(QUARTER FROM x)
Code
  translate(quarter(x, type = "year.quarter"))
Output
  <SQL> (EXTRACT(YEAR FROM x) || '.' || EXTRACT(QUARTER FROM x))
Code
  translate(quarter(x, type = "quarter"))
Output
  <SQL> EXTRACT(QUARTER FROM x)
Code
  translate(quarter(x, type = TRUE))
Output
  <SQL> (EXTRACT(YEAR FROM x) || '.' || EXTRACT(QUARTER FROM x))
Code
  translate(quarter(x, type = FALSE))
Output
  <SQL> EXTRACT(QUARTER FROM x)
Code
  translate(quarter(x, type = "date_first"))
Output
  <SQL> (CAST(DATE_TRUNC('QUARTER', x) AS DATE))
Code
  translate(quarter(x, type = "date_last"))
Output
  <SQL> (CAST((DATE_TRUNC('QUARTER', x) + INTERVAL '1 QUARTER' - INTERVAL '1 DAY') AS DATE))
Code
  translate(month(x, label = FALSE))
Output
  <SQL> EXTRACT(MONTH FROM x)
Code
  translate(month(x, label = TRUE))
Output
  <SQL> STRFTIME(x, '%b')
Code
  translate(month(x, label = TRUE, abbr = FALSE))
Output
  <SQL> STRFTIME(x, '%B')
Code
  translate(qday(x))
Output
  <SQL> DATE_DIFF('DAYS', DATE_TRUNC('QUARTER', CAST((x) AS DATE)), (CAST((x) AS DATE) + INTERVAL '1 DAY'))
Code
  translate(wday(x))
Output
  <SQL> EXTRACT('dow' FROM CAST(x AS DATE) + 0) + 1
Code
  translate(wday(x, week_start = 4))
Output
  <SQL> EXTRACT('dow' FROM CAST(x AS DATE) + 3) + 1
Code
  translate(wday(x, label = TRUE))
Output
  <SQL> STRFTIME(x, '%a')
Code
  translate(wday(x, label = TRUE, abbr = FALSE))
Output
  <SQL> STRFTIME(x, '%A')
Code
  translate(seconds(x))
Output
  <SQL> TO_SECONDS(CAST(x AS BIGINT))
Code
  translate(minutes(x))
Output
  <SQL> TO_MINUTES(CAST(x AS BIGINT))
Code
  translate(hours(x))
Output
  <SQL> TO_HOURS(CAST(x AS BIGINT))
Code
  translate(days(x))
Output
  <SQL> TO_DAYS(CAST(x AS INTEGER))
Code
  translate(weeks(x))
Output
  <SQL> TO_DAYS(7 * CAST(x AS INTEGER))
Code
  translate(months(x))
Output
  <SQL> TO_MONTHS(CAST(x AS INTEGER))
Code
  translate(years(x))
Output
  <SQL> TO_YEARS(CAST(x AS INTEGER))
Code
  translate(floor_date(x, "month"))
Output
  <SQL> DATE_TRUNC('month', x)
Code
  translate(floor_date(x, "week"))
Output
  <SQL> CAST(x AS DATE) - CAST(EXTRACT('dow' FROM CAST(x AS DATE) + 0) AS INTEGER)
Code
  translate(floor_date(x, "week", week_start = 1))
Output
  <SQL> DATE_TRUNC('week', x)
Code
  translate(floor_date(x, "week", week_start = 4))
Output
  <SQL> CAST(x AS DATE) - CAST(EXTRACT('dow' FROM CAST(x AS DATE) + 3) AS INTEGER)

snapshots for custom stringr functions translated correctly

Code
  translate(str_c(x, y))
Output
  <SQL> CONCAT_WS('', x, y)
Code
  translate(str_detect(x, y))
Output
  <SQL> REGEXP_MATCHES(x, y)
Code
  translate(str_detect(x, y, negate = TRUE))
Output
  <SQL> (NOT(REGEXP_MATCHES(x, y)))
Code
  translate(str_replace(x, y, z))
Output
  <SQL> REGEXP_REPLACE(x, y, z)
Code
  translate(str_replace_all(x, y, z))
Output
  <SQL> REGEXP_REPLACE(x, y, z, 'g')
Code
  translate(str_squish(x))
Output
  <SQL> TRIM(REGEXP_REPLACE(x, '\s+', ' ', 'g'))
Code
  translate(str_remove(x, y))
Output
  <SQL> REGEXP_REPLACE(x, y, '')
Code
  translate(str_remove_all(x, y))
Output
  <SQL> REGEXP_REPLACE(x, y, '', 'g')
Code
  translate(str_to_sentence(x))
Output
  <SQL> (UPPER(x[0]) || x[1:NULL])
Code
  translate(str_starts(x, y))
Output
  <SQL> REGEXP_MATCHES(x,'^(?:'||y))
Code
  translate(str_ends(x, y))
Output
  <SQL> REGEXP_MATCHES((?:x,y||')$')
Code
  translate(str_pad(x, width = 10))
Output
  <SQL> LPAD(x, CAST(GREATEST(10, LENGTH(x)) AS INTEGER), ' ')
Code
  translate(str_pad(x, width = 10, side = "right"))
Output
  <SQL> RPAD(x, CAST(GREATEST(10, LENGTH(x)) AS INTEGER), ' ')
Code
  translate(str_pad(x, width = 10, side = "both", pad = "<"))
Output
  <SQL> RPAD(REPEAT('<', (10 - LENGTH(x)) / 2) || x, CAST(GREATEST(10, LENGTH(x)) AS INTEGER), '<')

snapshots datetime escaping working as in DBI

Code
  test_date <- as.Date("2020-01-01")
  escape(test_date)
Output
  <SQL> '2020-01-01'::date
Code
  escape("2020-01-01")
Output
  <SQL> '2020-01-01'
Code
  test_datetime <- as.POSIXct("2020-01-01 01:23:45 UTC", tz = "UTC")
  escape(test_datetime)
Output
  <SQL> '2020-01-01 01:23:45'::timestamp
Code
  escape("2020-01-01 01:23:45 UTC")
Output
  <SQL> '2020-01-01 01:23:45 UTC'
Code
  test_datetime_tz <- as.POSIXct("2020-01-01 18:23:45 UTC", tz = "America/Los_Angeles")
  escape(test_datetime_tz)
Output
  <SQL> '2020-01-02 02:23:45'::timestamp
Code
  escape("2020-01-01 18:23:45 PST")
Output
  <SQL> '2020-01-01 18:23:45 PST'

two variable aggregates are translated correctly

Code
  translate(cor(x, y), window = FALSE)
Output
  <SQL> CORR(x, y)
Code
  translate(cor(x, y), window = TRUE)
Output
  <SQL> CORR(x, y) OVER ()

these should give errors

Code
  translate(grepl("dummy", txt, perl = TRUE))
Condition
  Error:
  ! Parameters `perl`, `fixed` and `useBytes` in grepl are not currently supported in DuckDB backend
Code
  translate(quarter(x, type = "other"))
Condition
  Error:
  ! Unsupported type other
Code
  translate(quarter(x, fiscal_start = 2))
Condition
  Error:
  ! `fiscal_start` is not yet supported in DuckDB translation. Must be 1.
Code
  translate(str_pad(x, width = 10, side = "other"))
Condition
  Error:
  ! Argument 'side' should be "left", "right" or "both"