update SqlServerImportJob to use "drop table" command compatible with…

… earlier versions of SQL Server

src/main/java/org/pih/petl/job/type/SqlServerImportJob.java

@@ -1,12 +1,5 @@
 package org.pih.petl.job.type;
 
-import java.sql.Connection;
-import java.sql.ResultSet;
-import java.sql.SQLException;
-import java.sql.Statement;
-import java.util.Iterator;
-import java.util.List;
-
 import com.microsoft.sqlserver.jdbc.ISQLServerConnection;
 import com.microsoft.sqlserver.jdbc.SQLServerBulkCopy;
 import com.microsoft.sqlserver.jdbc.SQLServerBulkCopyOptions;
@@ -25,6 +18,13 @@
 import org.pih.petl.job.datasource.EtlDataSource;
 import org.pih.petl.job.datasource.SqlStatementParser;
 
+import java.sql.Connection;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Statement;
+import java.util.Iterator;
+import java.util.List;
+
 /**
  * PetlJob that can load into SQL Server table
  */
@@ -89,9 +89,9 @@ public void execute(final ExecutionContext context) throws Exception {
  sourceConnection.setAutoCommit(false); // We intend to rollback changes to source after querying DB
  targetConnection.setAutoCommit(true); // We want to commit to target as we go, to query status
 
- // First, drop any existing target table
+ // First, drop any existing target table (we don't use "drop table if exists..." syntax for backwards compatibility with earlier versions of SQL Server
  context.setStatus("Dropping existing table");
- qr.update(targetConnection, "drop table if exists " + targetTable);
+ qr.update(targetConnection, "IF OBJECT_ID('dbo." + targetTable+ "') IS NOT NULL DROP TABLE dbo." + targetTable);
 
  // Then, recreate the target table
  context.setStatus("Creating table");