DatabaseMetaData.getPrimaryKeys: the wrong constraint name was reported if there…

DatabaseMetaData.getPrimaryKeys: the wrong constraint name was reported if there was another constraint on the same table and columns.

h2/src/main/org/h2/table/MetaTable.java

@@ -733,7 +733,13 @@ public class MetaTable extends Table {
                     for (int k = 0; constraints != null && k < constraints.size(); k++) {
                         Constraint constraint = constraints.get(k);
                         if (constraint.getUniqueIndex() == index) {
-                            constraintName = constraint.getName();
+                            if (index.getIndexType().isPrimaryKey()) {
+                                if (constraint.getConstraintType().equals(Constraint.PRIMARY_KEY)) {
+                                    constraintName = constraint.getName();
+                                }
+                            } else {
+                                constraintName = constraint.getName();
+                            }
                         }
                     }
                     IndexColumn[] cols = index.getIndexColumns();

h2/src/test/org/h2/test/test-1.1.txt

 --- special grammar and test cases ---------------------------------------------------------------------------------------------
+create table test(id int, constraint pk primary key(id), constraint x unique(id));
+> ok
+
+select constraint_name from information_schema.indexes where table_name = 'TEST';
+> CONSTRAINT_NAME
+> ---------------
+> PK
+> rows: 1
+
+drop table test;
+> ok
+
+create table test(id int, name varchar);
+> ok
+
+alter table test alter column id identity;
+> ok
+
+drop table test;
+> ok
+
+create table test(id int primary key, name varchar);
+> ok
+
+alter table test alter column id int auto_increment;
+> ok
+
+drop table test;
+> ok
+
 create table test(id identity) as select x from system_range(1, 4);
 > ok