2026-03-12 20:23:15

tpt/demos/BatchInsert.java

@@ -0,0 +1,46 @@
+// run with:
+// java -cp $ORACLE_HOME/jdbc/lib/ojdbc8.jar:. BatchInsert
+
+// requires:
+// CREATE TABLE t(a NUMBER, b VARCHAR2(150));
+
+// results in these metrics (Starts=10) for a single *batch* execution of the SQL (v$sql.executions=1)
+//
+// INSERT INTO t SELECT :1 , :2  FROM dual
+// 
+// --------------------------------------------------------------------------------------------------------
+// | Id  | Operation                | Name | Starts | E-Rows | Cost (%CPU)| A-Rows |   A-Time   | Buffers |
+// --------------------------------------------------------------------------------------------------------
+// |   0 | INSERT STATEMENT         |      |     10 |        |     2 (100)|      0 |00:00:00.01 |      13 |
+// |   1 |  LOAD TABLE CONVENTIONAL | T    |     10 |        |            |      0 |00:00:00.01 |      13 |
+// |   2 |   FAST DUAL              |      |     10 |      1 |     2   (0)|     10 |00:00:00.01 |       0 |
+// --------------------------------------------------------------------------------------------------------
+
+
+import java.sql.*;
+import oracle.jdbc.OracleConnection;
+
+public class BatchInsert {
+
+    public static void main(String[] args) throws InterruptedException {
+
+        try {
+            DriverManager.registerDriver(new oracle.jdbc.OracleDriver());
+            Connection conn = DriverManager.getConnection( "jdbc:oracle:thin:@linux01:1521:LIN19C", "system","oracle");
+            
+            String sql = "INSERT INTO t SELECT ?, ? FROM dual";
+            PreparedStatement stmt = conn.prepareStatement(sql);
+
+            for(int i=1; i<=10; i++) {
+                stmt.setInt(1, i);
+                stmt.setString(2, new String("blah"));
+                stmt.addBatch(); 
+            }
+
+            stmt.executeBatch(); 
+            
+        } catch (SQLException ex) {
+            ex.printStackTrace(); 
+        }
+    }
+}