[nongnu] elpa/emacsql c512f4287c 315/427: Add back-end note to README.

[ELPA Syncer]

branch: elpa/emacsql
commit c512f4287c12d67c6a6bbd25f19283ebdf1e77f1
Author: Christopher Wellons <wellons@nullprogram.com>
Commit: Christopher Wellons <wellons@nullprogram.com>

    Add back-end note to README.
---
 README.md | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/README.md b/README.md
index 5da1c6a107..48e7cb3316 100644
--- a/README.md
+++ b/README.md
@@ -378,8 +378,14 @@ inherits from `emacsql-connection`.
  * Preferably provide `emacsql-reconnect` if possible.
  * Set the default isolation level to *serializable*.
  * Enable autocommit mode by default.
+ * Prefer ANSI syntax (value escapes, identifier escapes, etc.).
  * Enable foreign key constraints by default.
 
+The goal of the autocommit, isolation, parsing, and foreign key
+configuration settings is to normalize the interface as much as
+possible. The connection's user should have the option to be agnostic
+about which back-end is actually in use.
+
 The provided implementations should serve as useful examples. If your
 back-end outputs data in a clean, standard way you may be able to use
 the emacsql-protocol-mixin class to do most of the work.