From 75d9e56dcb4a262801f5df1fae5927857a58fdfd Mon Sep 17 00:00:00 2001
From: Boris Kolpackov 12.2 MySQL Database Class 12.3 MySQL Connection and Connection Factory
+ 12.4 MySQL Exceptions
+
@@ -10195,6 +10202,21 @@ namespace odb
12.5 MySQL Limitations
+
+
+
+
+ 12.5.1 Foreign Key Constraints what()
function returns a human-readable description
of an error.
The following sections describe MySQL-specific limitations imposed + by the current MySQL and ODB runtime versions.
+ +ODB relies on standard SQL behavior which requires that foreign + key constraints checking is deferred until the transaction is + committed. The only behaviors supported by MySQL are to either + check such constraints immediately (InnoDB engine) or to ignore + foreign key constraints altogether (all other engines). As a + result, schemas generated by the ODB compiler for MySQL have + foreign key definitions commented out. They are retained only + for documentation.
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