tweaks: Tweaks for DBI tests

Description

TBD.

Usage

tweaks(..., constructor_name = NULL, constructor_relax_args = FALSE,
  strict_identifier = FALSE, omit_blob_tests = FALSE,
  current_needs_parens = FALSE, union = function(x) paste(x, collapse =
  " UNION "), placeholder_pattern = NULL, logical_return = identity,
  date_cast = function(x) paste0("date('", x, "')"), time_cast = function(x)
  paste0("time('", x, "')"), timestamp_cast = function(x)
  paste0("timestamp('", x, "')"), date_typed = TRUE, time_typed = TRUE,
  timestamp_typed = TRUE, temporary_tables = TRUE)

Arguments

...

[any] Unknown tweaks are accepted, with a warning. The ellipsis also asserts that all arguments are named.

constructor_name

[character(1)] Name of the function that constructs the Driver object.

constructor_relax_args

[logical(1)] If TRUE, allow a driver constructor with default values for all arguments; otherwise, require a constructor with empty argument list (default).

strict_identifier

[logical(1)] Set to TRUE if the DBMS does not support arbitrarily-named identifiers even when quoting is used.

omit_blob_tests

[logical(1)] Set to TRUE if the DBMS does not support a BLOB data type.

current_needs_parens

[logical(1)] Set to TRUE if the SQL functions current_date, current_time, and current_timestamp require parentheses.

union

[function(character)] Function that combines several subqueries into one so that the resulting query returns the concatenated results of the subqueries

placeholder_pattern

[character] A pattern for placeholders used in dbBind(), e.g., "?", "$1", or ":name". See make_placeholder_fun() for details.

logical_return

[function(logical)] A vectorized function that converts logical values to the data type returned by the DBI backend.

date_cast

[function(character)] A vectorized function that creates an SQL expression for coercing a string to a date value.

time_cast

[function(character)] A vectorized function that creates an SQL expression for coercing a string to a time value.

timestamp_cast

[function(character)] A vectorized function that creates an SQL expression for coercing a string to a timestamp value.

date_typed

[logical(1L)] Set to FALSE if the DBMS doesn't support a dedicated type for dates.

time_typed

[logical(1L)] Set to FALSE if the DBMS doesn't support a dedicated type for times.

timestamp_typed

[logical(1L)] Set to FALSE if the DBMS doesn't support a dedicated type for timestamps.

temporary_tables

[logical(1L)] Set to FALSE if the DBMS doesn't support temporary tables.