Add locking clause syntax to dialect (#310)

Provide the correct MySQL syntax for SELECT locking clauses via the new SQLDialect properties.
vapor · Aug 2, 2022 · faecdf3 · faecdf3
1 parent f8bd73b
commit faecdf3
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/Sources/MySQLKit/MySQLDialect.swift b/Sources/MySQLKit/MySQLDialect.swift
@@ -77,4 +77,12 @@ public struct MySQLDialect: SQLDialect {
     public var unionFeatures: SQLUnionFeatures {
         [.union, .unionAll, .explicitDistinct, .parenthesizedSubqueries]
     }
+
+    public var sharedSelectLockExpression: SQLExpression? {
+        SQLRaw("LOCK IN SHARE MODE")
+    }
+
+    public var exclusiveSelectLockExpression: SQLExpression? {
+        SQLRaw("FOR UPDATE")
+    }
 }