Add discover primary/foreign keys

lib/schema.js

@@ -426,6 +426,55 @@ Schema.prototype.discoverModelProperties = function (options, cb) {
   }
 };
 
+/**
+ * Discover primary keys for a given owner/table
+ *
+ * Each primary key column description has the following columns:
+ * TABLE_SCHEM String => table schema (may be null)
+ * TABLE_NAME String => table name
+ * COLUMN_NAME String => column name
+ * KEY_SEQ short => sequence number within primary key( a value of 1 represents the first column of the primary key, a value of 2 would represent the second column within the primary key).
+ * PK_NAME String => primary key name (may be null)
+ *
+ * @param owner
+ * @param table
+ * @param cb
+ */
+Schema.prototype.discoverPrimaryKeys= function(owner, table, cb) {
+    this.freeze();
+    if (this.adapter.discoverPrimaryKeys) {
+        this.adapter.discoverPrimaryKeys(options, cb);
+    } else if (cb) {
+        cb();
+    }
+}
+
+/**
+ * Discover foreign keys for a given owner/table
+ *
+ * PKTABLE_SCHEM String => primary key table schema being imported (may be null)
+ * PKTABLE_NAME String => primary key table name being imported
+ * PKCOLUMN_NAME String => primary key column name being imported
+ * FKTABLE_CAT String => foreign key table catalog (may be null)
+ * FKTABLE_SCHEM String => foreign key table schema (may be null)
+ * FKTABLE_NAME String => foreign key table name
+ * FKCOLUMN_NAME String => foreign key column name
+ * KEY_SEQ short => sequence number within a foreign key( a value of 1 represents the first column of the foreign key, a value of 2 would represent the second column within the foreign key).
+ * FK_NAME String => foreign key name (may be null)
+ * PK_NAME String => primary key name (may be null)
+ *
+ * @param owner
+ * @param table
+ * @param cb
+ */
+Schema.prototype.discoverForeignKeys= function(owner, table, cb) {
+    this.freeze();
+    if (this.adapter.discoverForeignKeys) {
+        this.adapter.discoverForeignKeys(options, cb);
+    } else if (cb) {
+        cb();
+    }
+}
 
 /**
  * Check whether migrations needed