diff --git a/R/dbQuoteLiteral_DBIConnection.R b/R/dbQuoteLiteral_DBIConnection.R
index eb1760a2e..c79a04bc3 100644
--- a/R/dbQuoteLiteral_DBIConnection.R
+++ b/R/dbQuoteLiteral_DBIConnection.R
@@ -48,8 +48,14 @@ dbQuoteLiteral_DBIConnection <- function(conn, x, ...) {
     return(SQL(blob_data, names = names(x)))
   }
 
+  if (is.double(x)) {
+    out <- sprintf("%.17e", x)
+    out[is.na(x)] <- "NULL"
+    return(SQL(out, names = names(x)))
+  }
+
   if (is.logical(x)) {
-    x <- as.numeric(x)
+    x <- as.integer(x)
   }
 
   x <- as.character(x)
diff --git a/tests/testthat/test-sql-df.R b/tests/testthat/test-sql-df.R
index 042ff36b4..4dafd61c4 100644
--- a/tests/testthat/test-sql-df.R
+++ b/tests/testthat/test-sql-df.R
@@ -6,6 +6,6 @@ test_that("NAs turn in NULLs", {
   )
   sql_df <- sqlData(ANSI(), df)
 
-  expect_equal(sql_df$x, SQL(c("1", "NULL")))
+  expect_equal(sql_df$x, SQL(c("1.00000000000000000e+00", "NULL")))
   expect_equal(sql_df$y, SQL(c("'a'", "NULL")))
 })