Add migration script for v6.0 SQL Server NVARCHAR changes

Signed-off-by: Chienlin <chienlin@miniasp.com>

Author: Chienlin

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

@@ -0,0 +1,31 @@
+-- Migration script for Spring Batch 6.0
+-- Changes VARCHAR columns to NVARCHAR to align with Microsoft JDBC driver behavior
+-- This improves performance by avoiding implicit conversions and reduces deadlock risk
+
+-- BATCH_JOB_INSTANCE table
+ALTER TABLE BATCH_JOB_INSTANCE ALTER COLUMN JOB_NAME NVARCHAR(100) NOT NULL;
+ALTER TABLE BATCH_JOB_INSTANCE ALTER COLUMN JOB_KEY NVARCHAR(32) NOT NULL;
+
+-- BATCH_JOB_EXECUTION table
+ALTER TABLE BATCH_JOB_EXECUTION ALTER COLUMN STATUS NVARCHAR(10) NULL;
+ALTER TABLE BATCH_JOB_EXECUTION ALTER COLUMN EXIT_CODE NVARCHAR(2500) NULL;
+ALTER TABLE BATCH_JOB_EXECUTION ALTER COLUMN EXIT_MESSAGE NVARCHAR(2500) NULL;
+
+-- BATCH_JOB_EXECUTION_PARAMS table
+ALTER TABLE BATCH_JOB_EXECUTION_PARAMS ALTER COLUMN PARAMETER_NAME NVARCHAR(100) NOT NULL;
+ALTER TABLE BATCH_JOB_EXECUTION_PARAMS ALTER COLUMN PARAMETER_TYPE NVARCHAR(100) NOT NULL;
+ALTER TABLE BATCH_JOB_EXECUTION_PARAMS ALTER COLUMN PARAMETER_VALUE NVARCHAR(2500);
+
+-- BATCH_STEP_EXECUTION table
+ALTER TABLE BATCH_STEP_EXECUTION ALTER COLUMN STEP_NAME NVARCHAR(100) NOT NULL;
+ALTER TABLE BATCH_STEP_EXECUTION ALTER COLUMN STATUS NVARCHAR(10) NULL;
+ALTER TABLE BATCH_STEP_EXECUTION ALTER COLUMN EXIT_CODE NVARCHAR(2500) NULL;
+ALTER TABLE BATCH_STEP_EXECUTION ALTER COLUMN EXIT_MESSAGE NVARCHAR(2500) NULL;
+
+-- BATCH_STEP_EXECUTION_CONTEXT table
+ALTER TABLE BATCH_STEP_EXECUTION_CONTEXT ALTER COLUMN SHORT_CONTEXT NVARCHAR(2500) NOT NULL;
+ALTER TABLE BATCH_STEP_EXECUTION_CONTEXT ALTER COLUMN SERIALIZED_CONTEXT NVARCHAR(MAX) NULL;
+
+-- 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;