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POUsing Prepared Statement multiple times efficiently
 

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    <p>Below is the code which I am using to insert <code>multiple records( around 5000-7000)</code> in the Oracle Database using Prepared Statement.</p> <p>The way I am doing currently is good? Or it can be improve more using some <code>batch thing</code>?</p> <pre><code>pstatement = db_connection.prepareStatement(PDSLnPConstants.UPSERT_SQL); for (Entry&lt;Integer, LinkedHashMap&lt;Integer, String&gt;&gt; entry : MAPPING.entrySet()) { pstatement.setInt(1, entry.getKey()); pstatement.setString(2, entry.getValue().get(LnPConstants.CGUID_ID)); pstatement.setString(3, entry.getValue().get(LnPConstants.PGUID_ID)); pstatement.setString(4, entry.getValue().get(LnPConstants.SGUID_ID)); pstatement.setString(5, entry.getValue().get(LnPConstants.UID_ID)); pstatement.setString(6, entry.getValue().get(LnPConstants.ULOC_ID)); pstatement.setString(7, entry.getValue().get(LnPConstants.SLOC_ID)); pstatement.setString(8, entry.getValue().get(LnPConstants.PLOC_ID)); pstatement.setString(9, entry.getValue().get(LnPConstants.ALOC_ID)); pstatement.setString(10, entry.getValue().get(LnPConstants.SITE_ID)); pstatement.executeUpdate(); pstatement.clearParameters(); } </code></pre> <p><strong>Udpated Code That I am Using:-</strong></p> <pre><code>public void runNextCommand() { Connection db_connection = null; PreparedStatement pstatement = null; int batchLimit = 1000; boolean autoCommit = false; try { db_connection = getDBConnection(); autoCommit = db_connection.getAutoCommit(); db_connection.setAutoCommit(false); //Turn off autoCommit pstatement = db_connection.prepareStatement(LnPConstants.UPSERT_SQL); // create a statement for (Entry&lt;Integer, LinkedHashMap&lt;Integer, String&gt;&gt; entry : GUID_ID_MAPPING.entrySet()) { pstatement.setInt(1, entry.getKey()); pstatement.setString(2, entry.getValue().get(LnPConstants.CGUID_ID)); pstatement.setString(3, entry.getValue().get(LnPConstants.PGUID_ID)); pstatement.setString(4, entry.getValue().get(LnPConstants.SGUID_ID)); pstatement.setString(5, entry.getValue().get(LnPConstants.UID_ID)); pstatement.setString(6, entry.getValue().get(LnPConstants.ULOC_ID)); pstatement.setString(7, entry.getValue().get(LnPConstants.SLOC_ID)); pstatement.setString(8, entry.getValue().get(LnPConstants.PLOC_ID)); pstatement.setString(9, entry.getValue().get(LnPConstants.ALOC_ID)); pstatement.setString(10, entry.getValue().get(LnPConstants.SITE_ID)); pstatement.addBatch(); batchLimit--; if(batchLimit == 0){ pstatement.executeBatch(); pstatement.clearBatch(); batchLimit = 1000; } pstatement.clearParameters(); } } catch (SQLException e) { getLogger().log(LogLevel.ERROR, e); } finally { try { pstatement.executeBatch(); db_connection.commit(); db_connection.setAutoCommit(autoCommit); } catch (SQLException e1) { getLogger().log(LogLevel.ERROR, e1.getMessage(), e1.fillInStackTrace()); } if (pstatement != null) { try { pstatement.close(); pstatement = null; } catch (SQLException e) { getLogger().log(LogLevel.ERROR, e.getMessage(), e.fillInStackTrace()); } } if (db_connection!= null) { try { db_connection.close(); db_connection = null; } catch (SQLException e) { getLogger().log(LogLevel.ERROR, e.getMessage(), e.fillInStackTrace()); } } } } </code></pre>
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