Allow abs(increment) == maxValue - minValue for sequences

h2/src/main/org/h2/schema/Sequence.java

@@ -143,9 +143,9 @@ public class Sequence extends SchemaObjectBase {
             maxValue >= value &&
             maxValue > minValue &&
             increment != 0 &&
-            // Math.abs(increment) < maxValue - minValue
+            // Math.abs(increment) <= maxValue - minValue
             // Can use Long.compareUnsigned() on Java 8
-            Math.abs(increment) + Long.MIN_VALUE < maxValue - minValue + Long.MIN_VALUE;
+            Math.abs(increment) + Long.MIN_VALUE <= maxValue - minValue + Long.MIN_VALUE;
     }
 
     private static long getDefaultMinValue(Long startValue, long increment) {

h2/src/test/org/h2/test/scripts/TestScript.java

@@ -125,7 +125,7 @@ public class TestScript extends TestDb {
             testScript("datatypes/" + s + ".sql");
         }
         for (String s : new String[] { "alterTableAdd", "alterTableDropColumn", "alterTableRename",
-                "createAlias", "createSynonym", "createTable", "createTrigger", "createView",
+                "createAlias", "createSequence", "createSynonym", "createTable", "createTrigger", "createView",
                 "dropDomain", "dropIndex", "dropSchema", "truncateTable" }) {
             testScript("ddl/" + s + ".sql");
         }

h2/src/test/org/h2/test/scripts/ddl/createSequence.sql

+-- Copyright 2004-2018 H2 Group. Multiple-Licensed under the MPL 2.0,
+-- and the EPL 1.0 (http://h2database.com/html/license.html).
+-- Initial Developer: H2 Group
+--
+
+CREATE SEQUENCE SEQ START WITH 0 INCREMENT BY 1 MINVALUE 0 MAXVALUE 1;
+> ok
+
+DROP SEQUENCE SEQ;
+> ok
+
+CREATE SEQUENCE SEQ START WITH 0 INCREMENT BY 1 MINVALUE 0 MAXVALUE 0;
+> exception SEQUENCE_ATTRIBUTES_INVALID
+
+CREATE SEQUENCE SEQ START WITH 1 INCREMENT BY 1 MINVALUE 1 MAXVALUE 0;
+> exception SEQUENCE_ATTRIBUTES_INVALID
+
+CREATE SEQUENCE SEQ START WITH 0 INCREMENT BY 0 MINVALUE 0 MAXVALUE 1;
+> exception SEQUENCE_ATTRIBUTES_INVALID
+
+CREATE SEQUENCE SEQ START WITH 1 INCREMENT BY 1 MINVALUE 2 MAXVALUE 10;
+> exception SEQUENCE_ATTRIBUTES_INVALID
+
+CREATE SEQUENCE SEQ START WITH 20 INCREMENT BY 1 MINVALUE 1 MAXVALUE 10;
+> exception SEQUENCE_ATTRIBUTES_INVALID
+
+CREATE SEQUENCE SEQ START WITH 0 INCREMENT BY 9223372036854775807 MINVALUE -9223372036854775808 MAXVALUE 9223372036854775807;
+> ok
+
+DROP SEQUENCE SEQ;
+> ok
+
+CREATE SEQUENCE SEQ START WITH 0 INCREMENT BY -9223372036854775808 MINVALUE -9223372036854775808 MAXVALUE 9223372036854775807;
+> ok
+
+DROP SEQUENCE SEQ;
+> ok
+
+CREATE SEQUENCE SEQ START WITH 0 INCREMENT BY -9223372036854775808 MINVALUE -1 MAXVALUE 9223372036854775807;
+> ok
+
+DROP SEQUENCE SEQ;
+> ok
+
+CREATE SEQUENCE SEQ START WITH 0 INCREMENT BY -9223372036854775808 MINVALUE 0 MAXVALUE 9223372036854775807;
+> exception SEQUENCE_ATTRIBUTES_INVALID
+