BATCH-1546: add and run integration tests for oracle

spring-batch-infrastructure/src/main/java/org/springframework/batch/item/database/support/OraclePagingQueryProvider.java

@@ -43,7 +43,7 @@ public class OraclePagingQueryProvider extends AbstractSqlPagingQueryProvider {
 		int offset = (page * pageSize);
 		offset = offset==0 ? 1 : offset;
 		return SqlPagingQueryUtils.generateRowNumSqlQuery(this, this.getSortKey() + " AS SORT_KEY", false,
-				"ROWNUM = " + offset);
+				"TMP_ROW_NUM = " + offset);
 	}
 
 	private String buildRowNumClause(int pageSize) {

spring-batch-infrastructure/src/main/java/org/springframework/batch/item/database/support/SqlPagingQueryUtils.java

@@ -101,7 +101,7 @@ public class SqlPagingQueryUtils {
 	public static String generateRowNumSqlQuery(AbstractSqlPagingQueryProvider provider, String selectClause, boolean remainingPageQuery,
 			String rowNumClause) {
 		StringBuilder sql = new StringBuilder();
-		sql.append("SELECT * FROM (SELECT ").append(selectClause);
+		sql.append("SELECT * FROM (SELECT ").append(selectClause).append(", ROWNUM as TMP_ROW_NUM");
 		sql.append(" FROM ").append(provider.getFromClause());
 		buildWhereClause(provider, remainingPageQuery, sql);
 		sql.append(" ORDER BY ").append(provider.getSortKey());

spring-batch-infrastructure/src/main/java/org/springframework/batch/item/support/AbstractItemCountingItemStreamItemReader.java

@@ -136,6 +136,9 @@ public abstract class AbstractItemCountingItemStreamItemReader<T> implements Ite
 		catch (Exception e) {
 			throw new ItemStreamException("Failed to initialize the reader", e);
 		}
+		if (!isSaveState()) {
+			return;
+		}
 
 		if (executionContext.containsKey(ecSupport.getKey(READ_COUNT_MAX))) {
 			maxItemCount = executionContext.getInt(ecSupport.getKey(READ_COUNT_MAX));