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SAP HANA backend

Source: R/backend-hana.R
backend-hana.Rd

This backend supports SAP HANA databases, typically accessed via HDBConnection created by DBI::dbConnect(). Use dialect_hana() with lazy_frame() to see simulated SQL without connecting to a live database.

Key differences for this backend are:

  • Temporary tables get # prefix and use LOCAL TEMPORARY COLUMN.

  • No table analysis performed in dplyr::copy_to().

  • paste() uses ||

  • Note that you can't create new boolean columns from logical expressions; you need to wrap with explicit ifelse: ifelse(x > y, TRUE, FALSE).

See vignette("translation-function") and vignette("translation-verb") for details of overall translation technology.

Usage

dialect_hana()

simulate_hana()

Examples

library(dplyr, warn.conflicts = FALSE)

lf <- lazy_frame(a = TRUE, b = 1, c = 2, d = "z", con = dialect_hana())
lf |> transmute(x = paste0(d, " times"))
#> <SQL>
#> SELECT "d" || ' times' AS "x"
#> FROM "df"