{"id":490,"date":"2012-11-11T19:28:35","date_gmt":"2012-11-11T19:28:35","guid":{"rendered":"http:\/\/ilias-laptop\/examples\/core-java\/sql\/handle-sql-warning-example\/"},"modified":"2013-05-11T13:03:34","modified_gmt":"2013-05-11T10:03:34","slug":"handle-sql-warning-example","status":"publish","type":"post","link":"https:\/\/examples.javacodegeeks.com\/java-development\/core-java\/sql\/handle-sql-warning-example\/","title":{"rendered":"Handle SQL warning example"},"content":{"rendered":"<p>In this example we shall show you how to handle SQL Warnings in Java. To handle SQL Warnings one should perform the following steps:<\/p>\n<ul>\n<li>Load the JDBC driver, using the <code>forName(String className)<\/code> API method of the <a href=\"http:\/\/docs.oracle.com\/javase\/7\/docs\/api\/java\/lang\/Class.html\" target=\"_blank\">Class<\/a>. In this example we use the Oracle JDBC driver.<\/li>\n<li>Create a <a href=\"http:\/\/docs.oracle.com\/javase\/7\/docs\/api\/java\/sql\/Connection.html\" target=\"_blank\">Connection<\/a> to the database. Invoke the <code>getConnection(String url, String user, String password)<\/code> API method of the <a href=\"http:\/\/docs.oracle.com\/javase\/7\/docs\/api\/java\/sql\/DriverManager.html\" target=\"_blank\">DriverManager<\/a> to create the connection.<\/li>\n<li>Get the <a href=\"http:\/\/docs.oracle.com\/javase\/7\/docs\/api\/java\/sql\/SQLWarning.html\" target=\"_blank\">SQLWarning<\/a> risen while connecting to the database, using the <code>getWarnings()<\/code> API method of the Connection.<\/li>\n<li>Check the connectionWarning, with <code>getMessage()<\/code>, <code>getSQLState()<\/code>,<code> getErrorCode()<\/code> and then get the next warning with<code> getNextWarning()<\/code> API methods of the SQLWarning.<\/li>\n<li>Execute an SQL <a href=\"http:\/\/docs.oracle.com\/javase\/7\/docs\/api\/java\/sql\/Statement.html\" target=\"_blank\">Statement<\/a>, which returns a <a href=\"http:\/\/docs.oracle.com\/javase\/7\/docs\/api\/java\/sql\/ResultSet.html\" target=\"_blank\">ResultSet<\/a> object. For each row of the ResultSet get the SQLWarnings, using the <code>getWarnings()<\/code> API method of the ResultSet.<\/li>\n<li>Check on the resultsetWarning with the <code>getMessage()<\/code>, <code>getSQLState()<\/code>, <code>getErrorCode()<\/code> and then get the next warning with <code>getNextWarning()<\/code> API methods of the ResultSet,<\/li>\n<\/ul>\n<p> as described in the code snippet below.<div style=\"display:inline-block; margin: 15px 0;\"> <div id=\"adngin-JavaCodeGeeks_incontent_video-0\" style=\"display:inline-block;\"><\/div> <\/div><\/p>\n<pre class=\"brush: java\">package com.javacodegeeks.snippets.core;\r\n \r\nimport java.sql.Connection;\r\nimport java.sql.DriverManager;\r\nimport java.sql.ResultSet;\r\nimport java.sql.SQLException;\r\nimport java.sql.SQLWarning;\r\nimport java.sql.Statement;\r\n\r\npublic class SQLWarning {\r\n \r\n  public static void main(String[] args) {\r\n\r\n    Connection connection = null;\r\n    try {\r\n\r\n  \/\/ Load the Oracle JDBC driver\r\n\r\n  String driverName = \"oracle.jdbc.driver.OracleDriver\";\r\n\r\n  Class.forName(driverName);\r\n\r\n\r\n  \/\/ Create a connection to the database\r\n\r\n  String serverName = \"localhost\";\r\n\r\n  String serverPort = \"1521\";\r\n\r\n  String sid = \"mySchema\";\r\n\r\n  String url = \"jdbc:oracle:thin:@\" + serverName + \":\" + serverPort + \":\" + sid;\r\n\r\n  String username = \"username\";\r\n\r\n  String password = \"password\";\r\n\r\n  connection = DriverManager.getConnection(url, username, password);\r\n\r\n  \r\n\r\n  System.out.println(\"Successfully Connected to the database!\");\r\n\r\n  \r\n    } catch (ClassNotFoundException e) {\r\n\r\n  System.out.println(\"Could not find the database driver \" + e.getMessage());\r\n    } catch (SQLException e) {\r\n\r\n  System.out.println(\"Could not connect to the database \" + e.getMessage());\r\n    }\r\n\r\n    try {\r\n\r\n  \/\/ Get warnings risen while connecting to the database\r\n\r\n  SQLWarning connectionWarning = connection.getWarnings();\r\n\r\n  \r\n\r\n  while (connectionWarning != null) {\r\n\r\n\r\nString warningMessage = connectionWarning.getMessage();\r\n\r\n\r\nString warningSQLState = connectionWarning.getSQLState();\r\n\r\n\r\nint warningErrorCode = connectionWarning.getErrorCode();\r\n\r\n\r\n\r\n\r\n\r\nSystem.out.println(\"Connection warning : \" + warningErrorCode +\" Message : \" + warningMessage + \" SQL state \" + warningSQLState);\r\n\r\n\r\n\r\n\r\n\r\nconnectionWarning = connectionWarning.getNextWarning();\r\n\r\n  }\r\n\r\n\r\n  \/\/ Create a statement\r\n\r\n  Statement statement = connection.createStatement();\r\n\r\n\r\n  \/\/ Use the statement...\r\n\r\n\r\n  \/\/ Get warnings risen while using the statement\r\n\r\n  SQLWarning statementWarning = statement.getWarnings();\r\n\r\n  if (statementWarning != null) {\r\n\r\n\r\nString warningMessage = statementWarning.getMessage();\r\n\r\n\r\nString warningSQLState = statementWarning.getSQLState();\r\n\r\n\r\nint warningErrorCode = statementWarning.getErrorCode();\r\n\r\n\r\n\r\n\r\n\r\nSystem.out.println(\"Statement warning : \" + warningErrorCode +\" Message : \" + warningMessage + \" SQL state \" + warningSQLState);\r\n\r\n\r\n\r\n\r\n\r\nstatementWarning = statementWarning.getNextWarning();\r\n\r\n  }\r\n\r\n\r\n  \/\/ Get the result set from the statement\r\n\r\n  ResultSet resultSet = statement.executeQuery(\"SELECT * FROM test_table\");\r\n\r\n  while (resultSet.next()) {\r\n\r\n\r\n    \r\n\r\n\r\n\/\/ Use result set ...\r\n\r\n\r\n\r\n\/\/ Get warnings on the current row of the result set\r\n\r\n\r\nSQLWarning resultsetWarning = resultSet.getWarnings();\r\n\r\n\r\nif (resultsetWarning != null) {\r\n\r\n\r\n\r\n  String warningMessage = resultsetWarning.getMessage();\r\n\r\n\r\n\r\n  String warningSQLState = resultsetWarning.getSQLState();\r\n\r\n\r\n\r\n  int warningErrorCode = resultsetWarning.getErrorCode();\r\n\r\n\r\n\r\n  \r\n\r\n\r\n\r\n  System.out.println(\"Resultset warning : \" + warningErrorCode +\" Message : \" + warningMessage + \" SQL state \" + warningSQLState);\r\n\r\n\r\n\r\n  \r\n\r\n\r\n\r\n  resultsetWarning = resultsetWarning.getNextWarning();\r\n\r\n\r\n}\r\n\r\n  }\r\n\r\n  \r\n    } catch (SQLException e) {\r\n    }\r\n\r\n }\r\n\r\n}\r\n<\/pre>\n<p>\n<b>Output:<\/b><\/p>\n<pre style=\"background: #f0f0f0; border: 1px dashed #CCCCCC; color: black; font-family: arial; font-size: 12px; height: auto; line-height: 20px; overflow: auto; padding: 0px; text-align: left; width: 99%;\">\r\n<code style=\"color: black; word-wrap: normal;\">Successfully Connected to the database!<\/code>\r\n<\/pre>\n<p>&nbsp;<br \/>\nThis was an example of how to handle SQL Warnings in Java.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In this example we shall show you how to handle SQL Warnings in Java. To handle SQL Warnings one should perform the following steps: Load the JDBC driver, using the forName(String className) API method of the Class. In this example we use the Oracle JDBC driver. Create a Connection to the database. Invoke the getConnection(String &hellip;<\/p>\n","protected":false},"author":7,"featured_media":1204,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[53],"tags":[189,1055],"class_list":["post-490","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sql","tag-core-java-2","tag-sql"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Handle SQL warning example - Java Code Geeks<\/title>\n<meta name=\"description\" content=\"In this example we shall show you how to handle SQL Warnings in Java. 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