Add DDL migration scripts to version 6.0

Resolves #4983

Author: fmbenhassine

spring-batch-core/src/main/resources/org/springframework/batch/core/migration/6.0/migration-db2.sql

@@ -0,0 +1,2 @@
+-- IBM DB2 LUW (10.1+)
+RENAME SEQUENCE BATCH_JOB_SEQ TO BATCH_JOB_INSTANCE_SEQ;

spring-batch-core/src/main/resources/org/springframework/batch/core/migration/6.0/migration-derby.sql

@@ -0,0 +1 @@
+RENAME TABLE BATCH_JOB_SEQ TO BATCH_JOB_INSTANCE_SEQ;

spring-batch-core/src/main/resources/org/springframework/batch/core/migration/6.0/migration-h2.sql

@@ -0,0 +1,6 @@
+-- Sequence rename is not supported in H2
+-- https://github.com/h2database/h2database/issues/417
+
+CREATE SEQUENCE BATCH_JOB_INSTANCE_SEQ;
+-- Copy last value from old sequence to new sequence
+DROP SEQUENCE BATCH_JOB_SEQ;

spring-batch-core/src/main/resources/org/springframework/batch/core/migration/6.0/migration-hsqldb.sql

@@ -0,0 +1 @@
+ALTER TABLE BATCH_JOB_SEQ RENAME TO BATCH_JOB_INSTANCE_SEQ;

spring-batch-core/src/main/resources/org/springframework/batch/core/migration/6.0/migration-mariadb.sql

@@ -0,0 +1 @@
+RENAME SEQUENCE BATCH_JOB_SEQ TO BATCH_JOB_INSTANCE_SEQ;

spring-batch-core/src/main/resources/org/springframework/batch/core/migration/6.0/migration-mysql.sql

@@ -0,0 +1,7 @@
+-- MySQL: sequence emulated as a table
+RENAME TABLE BATCH_JOB_SEQ TO BATCH_JOB_INSTANCE_SEQ;
+
+-- Alternative (MySQL): create new table, migrate value, drop old
+-- CREATE TABLE BATCH_JOB_INSTANCE_SEQ (ID BIGINT NOT NULL);
+-- INSERT INTO BATCH_JOB_INSTANCE_SEQ (ID) SELECT ID FROM BATCH_JOB_SEQ;
+-- DROP TABLE BATCH_JOB_SEQ;

spring-batch-core/src/main/resources/org/springframework/batch/core/migration/6.0/migration-oracle.sql

@@ -0,0 +1 @@
+RENAME BATCH_JOB_SEQ to BATCH_JOB_INSTANCE_SEQ;

spring-batch-core/src/main/resources/org/springframework/batch/core/migration/6.0/migration-postgresql.sql

@@ -0,0 +1 @@
+ALTER SEQUENCE BATCH_JOB_SEQ RENAME TO BATCH_JOB_INSTANCE_SEQ;

spring-batch-core/src/main/resources/org/springframework/batch/core/migration/6.0/migration-sqlite.sql

@@ -0,0 +1 @@
+ALTER TABLE BATCH_JOB_SEQ RENAME TO BATCH_JOB_INSTANCE_SEQ;

spring-batch-core/src/main/resources/org/springframework/batch/core/migration/6.0/migration-sqlserver.sql

@@ -28,4 +28,7 @@ ALTER TABLE BATCH_STEP_EXECUTION_CONTEXT ALTER COLUMN SERIALIZED_CONTEXT NVARCHA
 
 -- BATCH_JOB_EXECUTION_CONTEXT table
 ALTER TABLE BATCH_JOB_EXECUTION_CONTEXT ALTER COLUMN SHORT_CONTEXT NVARCHAR(2500) NOT NULL;
-ALTER TABLE BATCH_JOB_EXECUTION_CONTEXT ALTER COLUMN SERIALIZED_CONTEXT NVARCHAR(MAX) NULL;
+ALTER TABLE BATCH_JOB_EXECUTION_CONTEXT ALTER COLUMN SERIALIZED_CONTEXT NVARCHAR(MAX) NULL;
+
+-- Rename sequence BATCH_JOB_SEQ to BATCH_JOB_INSTANCE_SEQ
+EXEC sp_rename 'BATCH_JOB_SEQ', 'BATCH_JOB_INSTANCE_SEQ';