David Fong DavidPatShuiFong
DavidPatShuiFong
/ testthat_mssql_char_to_int.R
Last active
January 26, 2021 00:51
Testing behaviour of character to numeric conversion in dbplyr
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| df <- data.frame(x = c("1.3", "2x")) | |
| # dbplyr::test_register_src( | |
| # "mssql", | |
| # odbc::dbConnect( | |
| # odbc::odbc(), Driver = "ODBC Driver 17 for SQL Server", | |
| # Server = "<server>", UID = "<uid>", PWD = "<password>") | |
| # ) | |
| con <- src_test("mssql") | |
| db <- copy_to(con, df, "##test") |
DavidPatShuiFong
/ test_mssql_char_to_int.R
Created
January 26, 2021 00:16
Test MSSQL casting from (invalid) character to integer/numeric.
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| library(dbplyr) | |
| library(dplyr, warn.conflicts = FALSE) | |
| df <- data.frame(x = c("1.3", "2x")) | |
| # both a 'float' (non-integer) and an 'invalid' number in the column | |
| con <- DBI::dbConnect(...) # connection to a MSSQL database | |
| db <- copy_to(con, df, "##test") | |
| db %>% mutate( | |
| float = TRY_CAST(x %as% sql("FLOAT")), |