刷建表语句
select c.table_name, case when c.column_id=c.COLUMN_ID_MIN then 'create external table '||u.USERNAME||'_'||c.table_name||' ( ' else ',' end ||c.sqltxt|| case when c.column_id=c.COLUMN_ID_MAX then ') row format DELIMITED FIELDS terminated by ''\001'' stored as textfile location ''ZZZZZZZ/' || c.table_name || ''';' else '' end , c.column_id, c.COLUMN_ID_MIN, c.COLUMN_ID_MAX from ( select table_name, column_name || ' ' || case data_type when 'NUMBER' then ' decimal(' || data_length || ',' || nvl(data_scale,0) || ') ' when 'FLOAT' then ' decimal(' || data_length || ',' || nvl(data_scale,0) || ') ' when 'VARCHAR2' then ' string ' when 'DATE' then ' string ' when 'INTEGER' then ' decimal(38,0)' when 'CHAR' then ' string ' end sqlTxt ,COLUMN_ID ,min(COLUMN_ID)over(partition by table_name) as COLUMN_ID_MIN ,max(COLUMN_ID)over(partition by table_name) as COLUMN_ID_MAX from user_tab_columns --where table_name='EMP' --order by COLUMN_ID asc )c left join user_users u on 1=1 order by c.table_name,c.COLUMN_ID asc
代码程序
package oa.epoint.com;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Statement;
//第一步，先把oracle数据抽取到hdfs目录，通过sqoop工具
//第二步，修改下面对应的链接，oracle链接即可
//第三步，执行程序，等程序执行完毕，数据都到了hyperbase表中，可验证
public class AutoImportDataToORC {
private static String ORACLEUSERNAME = "esv12001";
private static String ORACLEPASSWORD = "tjzysj";
private static String ORACLEDRIVER = "oracle.jdbc.OracleDriver";
private static String ORACLEURL = "jdbc:oracle:thin:@10.12.8.234:1521:orcl";
private static String HIVEDRIVER = "org.apache.hive.jdbc.HiveDriver";
private static String HIVEURL = "jdbc:hive2://10.12.8.152:10000/default";
private static String HIVEUSERNAME = "hive";
private static String HIVEPASSWORD = "hive123";
Connection oracleconn = null;
Statement oraclepstm = null;
ResultSet oraclers = null;
Connection hiveconn = null;
Statement hivepstm = null;
ResultSet hivers = null;
String sql1 = " ";
String sql2 = " ";
String sql3 = " ";
String sql4 = " ";
String sql5 = " ";
String sql6 = " ";
String ORACLEUSERNAME1 = ORACLEUSERNAME.replaceAll("001", "");
public static void main(String[] args) throws Exception {
AutoImportDataToORC aidth = new AutoImportDataToORC();
aidth.CreateExternalTable();
aidth.CreateOrcTable();
aidth.ImportDataToORC();
System.out.println("程序已经执行完毕！请去waterdrop验证结果吧！！");
}
public void CreateExternalTable() {
oracleconn = getOracleConnection();
hiveconn = getHiveConnection();
String sql0 = "dfs -du /tmp/imp/" + ORACLEUSERNAME.toUpperCase();
try {
hivepstm = hiveconn.createStatement();
oraclepstm = oracleconn.createStatement();
hivers = hivepstm.executeQuery(sql0);
int i = 0;
while (hivers.next()) {
String hdfsspace = hivers.getString(1);
String a[] = hdfsspace.split("/", 2);
String size = a[0];
String tableNameAndFloder = a[1];
String ss[] = tableNameAndFloder.split("/");
String tableName = ss[3];
if(Long.parseLong(size.trim()) != 0L){
i = i + 1;
String tableName1 = tableName.replaceAll("\\$", "");
String sql = "select c.table_name,\r\n" + " case when c.column_id=c.COLUMN_ID_MIN \r\n" + " then 'create external table if not exists " + ORACLEUSERNAME1 + "_EX."+tableName1+" ( ' \r\n" + " else ', ' \r\n" + " end \r\n" + " ||c.sqltxt||\r\n" + " case when c.column_id=c.COLUMN_ID_MAX \r\n" + " then ') row format DELIMITED FIELDS terminated by ''\\001'' stored as textfile location ''/tmp/imp/' ||u.USERNAME||'/'|| \r\n" + " c.table_name || \r\n" + " ''';' \r\n" + " else '' \r\n" + " end ,\r\n" + " c.column_id,\r\n" + " c.COLUMN_ID_MIN,\r\n" + " c.COLUMN_ID_MAX\r\n" + "from ( \r\n" + "select table_name,\r\n" + "'`' || column_name || '` ' || \r\n" + " case data_type\r\n" + " when 'NUMBER' then ' decimal(' || data_length || ',' || nvl(data_scale,0) || ') '\r\n" + " when 'FLOAT' then ' decimal(' || data_length || ',' || nvl(data_scale,0) || ') '\r\n" + " when 'VARCHAR2' then ' string '\r\n" + " when 'NVARCHAR2' then ' string '\r\n" + " when 'DATE' then ' string '\r\n" + " when 'INTEGER' then ' string '\r\n" + " when 'CHAR' then ' string '\r\n" + " when 'CLOB' then ' string '\r\n" + " when 'NCLOB' then ' string '\r\n" + " when 'BLOB' then ' string '\r\n" + " when 'LONG RAW' then ' string '\r\n" + " when 'UNDEFINED' then ' string '\r\n" + " when 'LONG' then ' string '\r\n" + " when 'Bit' then ' string '\r\n" + " when 'TIMESTAMP(6)' then ' string '\r\n" + " when 'Boolean' then ' string '\r\n" + " end sqlTxt\r\n" + " ,COLUMN_ID\r\n" + " ,min(COLUMN_ID)over(partition by table_name) as COLUMN_ID_MIN\r\n" + " ,max(COLUMN_ID)over(partition by table_name) as COLUMN_ID_MAX\r\n" + " from user_tab_columns \r\n" + " where table_name = '" + tableName + "' --order by COLUMN_ID asc \r\n" + " )c \r\n" + "left join user_users u on 1=1 \r\n" + "order by c.table_name,c.COLUMN_ID asc"; oraclers = oraclepstm.executeQuery(sql); while (oraclers.next()) { sql1 = oraclers.getString(2); sql2 = sql2 + sql1; } } } sql3 = "create database IF NOT EXISTS " + ORACLEUSERNAME1 + "_ex"; hivepstm.execute(sql3); System.out.println("-------------------建外表,一共" + i + "个表表结构的语句为：" + sql2); hivepstm.execute(sql2); System.out.println("----------------------------------------建外表已结束！！！！！！！！！！！！！！！！！！！！！！！！！！！！！"); hivepstm.close(); oraclepstm.close(); } catch (SQLException e) { e.printStackTrace(); } finally { OracleReleaseResource(); HiveReleaseResource(); } } public void CreateOrcTable() { oracleconn = getOracleConnection(); hiveconn = getHiveConnection(); String sql0 = "dfs -du /tmp/imp/" + ORACLEUSERNAME.toUpperCase(); int i = 0; try { hivepstm = hiveconn.createStatement(); oraclepstm = oracleconn.createStatement(); hivers = hivepstm.executeQuery(sql0); while (hivers.next()) { String hdfsspace = hivers.getString(1); String a[] = hdfsspace.split("/", 2); String size = a[0]; String tableNameAndFloder = a[1]; String ss[] = tableNameAndFloder.split("/"); String tableName = ss[3]; if(Long.parseLong(size.trim()) != 0L){ Long buckets = 0L; buckets = Long.parseLong(size.trim()) / (60 * 1024 * 1024) + 1; String sql_0 = "select column_name from user_tab_columns where table_name = '" + tableName.toUpperCase() + "' and column_id = 1"; oraclers = oraclepstm.executeQuery(sql_0); String tableName1 = tableName.replaceAll("\\$", ""); i = i + 1; while (oraclers.next()) { String columnname = oraclers.getString(1); String sql = "select c.table_name,\r\n" + " case when c.column_id=c.COLUMN_ID_MIN \r\n" + " then 'create table if not exists " + ORACLEUSERNAME1 + "."+ tableName1 +"( ' \r\n" + " else ', ' \r\n" + " end \r\n" + " ||c.sqltxt||\r\n" + " case when c.column_id=c.COLUMN_ID_MAX \r\n" + " then ') clustered by (" + columnname + ") into " + buckets + " buckets STORED AS ORC ;' \r\n" + " else '' \r\n" + " end ,\r\n" + " c.column_id,\r\n" + " c.COLUMN_ID_MIN,\r\n" + " c.COLUMN_ID_MAX\r\n" + "from ( \r\n" + "select table_name,\r\n" + " '`' || column_name || '` ' ||\r\n" + " case data_type\r\n" + " when 'NUMBER' then ' decimal(' || data_length || ',' || nvl(data_scale,0) || ') '\r\n" + " when 'FLOAT' then ' decimal(' || data_length || ',' || nvl(data_scale,0) || ') '\r\n" + " when 'VARCHAR2' then ' string '\r\n" + " when 'NVARCHAR2' then ' string '\r\n" + " when 'DATE' then ' date '\r\n" + " when 'INTEGER' then ' decimal(38,0)'\r\n" + " when 'CHAR' then ' string '\r\n" + " when 'CLOB' then ' clob '\r\n" + " when 'TIMESTAMP(6)' then ' timestamp '\r\n" + " when 'NCLOB' then ' clob '\r\n" + " when 'LONG RAW' then ' string '\r\n" + " when 'LONG' then ' string '\r\n" + " when 'UNDEFINED' then ' string '\r\n" + " when 'BLOB' then ' blob '\r\n" + " when 'Bit' then ' boolean '\r\n" + " when 'Boolean' then ' boolean '\r\n" + " end sqlTxt\r\n" + " ,COLUMN_ID\r\n" + " ,min(COLUMN_ID)over(partition by table_name) as COLUMN_ID_MIN\r\n" + " ,max(COLUMN_ID)over(partition by table_name) as COLUMN_ID_MAX\r\n" + " from user_tab_columns \r\n" + " where table_name = '" + tableName + "' --order by COLUMN_ID asc \r\n" + " )c \r\n" + "left join user_users u on 1=1 \r\n" + "order by c.table_name,c.COLUMN_ID asc"; oraclers = oraclepstm.executeQuery(sql); while (oraclers.next()) { sql4 = oraclers.getString(2); sql5 = sql5 + sql4; } } } } sql6 = "create database IF NOT EXISTS " + ORACLEUSERNAME1; System.out.println("-------------------建orc表库名的语句为：" + sql6); hivepstm.execute(sql6); System.out.println("-------------------建ORC表,一共" + i + "个表的表结构的语句为：" + sql5); hivepstm.execute(sql5); System.out.println("----------------------------------------建ORC表已结束！！！！！！！！！！！！！！！！！！！！！！！！！！！！！"); // hivepstm.close(); // oraclepstm.close(); } catch (SQLException e) { e.printStackTrace(); } finally { OracleReleaseResource(); HiveReleaseResource(); } } public void ImportDataToORC() { oracleconn = getOracleConnection(); hiveconn = getHiveConnection(); String sql = "select table_name from user_tables where num_rows > 0 order by table_name asc"; int i = 0; try { oraclepstm = oracleconn.createStatement(); oraclers = oraclepstm.executeQuery(sql); hivepstm = hiveconn.createStatement(); while (oraclers.next()) { i = i + 1; String table_name = oraclers.getString("table_name").replaceAll("\\$", ""); String sql7 = "insert into " + ORACLEUSERNAME1 + "." + table_name + " select * from " + ORACLEUSERNAME1 + "_ex." + table_name; System.out.println("现在插入第"+i+"个表："+sql7); hivepstm.execute(sql7); } } catch (SQLException e) { e.printStackTrace(); } finally { OracleReleaseResource(); HiveReleaseResource(); } } public Connection getOracleConnection() { try { Class.forName(ORACLEDRIVER); oracleconn = DriverManager.getConnection(ORACLEURL, ORACLEUSERNAME, ORACLEPASSWORD); } catch (ClassNotFoundException e) { throw new RuntimeException("class not find !", e); } catch (SQLException e) { throw new RuntimeException("get connection error!", e); } return oracleconn; } public void OracleReleaseResource() { if (oraclers != null) { try { oraclers.close(); } catch (SQLException e) { e.printStackTrace(); } } if (oraclepstm != null) { try { oraclepstm.close(); } catch (SQLException e) { e.printStackTrace(); } } if (oracleconn != null) { try { oracleconn.close(); } catch (SQLException e) { e.printStackTrace(); } } } public Connection getHiveConnection() { try { Class.forName(HIVEDRIVER); hiveconn = DriverManager.getConnection(HIVEURL, HIVEUSERNAME, HIVEPASSWORD); } catch (ClassNotFoundException e) { throw new RuntimeException("class not find !", e); } catch (SQLException e) { throw new RuntimeException("get connection error!", e); } return hiveconn; } public void HiveReleaseResource() { if (hivers != null) { try { hivers.close(); } catch (SQLException e) { e.printStackTrace(); } } if (hivepstm != null) { try { hivepstm.close(); } catch (SQLException e) { e.printStackTrace(); } } if (hiveconn != null) { try { hiveconn.close(); } catch (SQLException e) { e.printStackTrace(); } } } }
