Example usage for java.sql ResultSet getMetaData

List of usage examples for java.sql ResultSet getMetaData

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Introduction

In this page you can find the example usage for java.sql ResultSet getMetaData.

Prototype

ResultSetMetaData getMetaData() throws SQLException;

Source Link

Document

Retrieves the number, types and properties of this ResultSet object's columns.

Usage

From source file:hydrograph.ui.dataviewer.adapters.DataViewerAdapter.java

private void initializeColumnCount(ResultSet resultSet) throws SQLException {
    columnCount = resultSet.getMetaData().getColumnCount();
}

From source file:Statement.Statement.java

private void loadView() {
    fieldData = new Vector<>();
    fieldNames = new Vector();
    //Display Revenue
    try {//from w w  w. ja v a 2  s  .  c o  m
        PreparedStatement st = cnn
                .prepareStatement("SELECT TypeName,Quantity FROM Revenue where ShopID = ? and Date = ?");
        st.setString(1, code);
        st.setString(2, date);
        ResultSet rs = st.executeQuery();

        ResultSetMetaData meta = rs.getMetaData();
        for (int i = 1; i <= meta.getColumnCount(); i++) {
            fieldNames.add(meta.getColumnName(i));
        }
        while (rs.next()) {
            Vector tmp = new Vector();
            tmp.add(rs.getString(1));
            tmp.add(rs.getInt(2));
            fieldData.add(tmp);
        }
        model = new DefaultTableModel(fieldData, fieldNames);
        tbl.setModel(model);
    } catch (Exception e) {
    }
}

From source file:com.erbjuder.logger.server.rest.util.ResultSetConverter.java

public List<String> toStringList(ResultSet rs) throws Exception {

    List<String> list = new ArrayList<String>();
    try {//from ww w . ja v a 2 s  .  c o m

        // we will need the column names, this will save the table meta-data like column nmae.
        java.sql.ResultSetMetaData rsmd = rs.getMetaData();
        //loop through the ResultSet
        while (rs.next()) {

            //figure out how many columns there are
            int numColumns = rsmd.getColumnCount();

            //each row in the ResultSet will be converted to a JSON Object
            StringBuilder builder = new StringBuilder();
            // loop through all the columns and place them into the JSON Object
            for (int i = 1; i < numColumns + 1; i++) {
                String column_name = rsmd.getColumnName(i);

                if (rsmd.getColumnType(i) == java.sql.Types.ARRAY) {
                    builder.append(rs.getArray(column_name));

                } else if (rsmd.getColumnType(i) == java.sql.Types.BIGINT) {
                    builder.append(rs.getInt(column_name));

                } else if (rsmd.getColumnType(i) == java.sql.Types.BOOLEAN) {
                    builder.append(rs.getBoolean(column_name));

                } else if (rsmd.getColumnType(i) == java.sql.Types.BLOB) {
                    builder.append(rs.getBlob(column_name));

                } else if (rsmd.getColumnType(i) == java.sql.Types.DOUBLE) {
                    builder.append(rs.getDouble(column_name));

                } else if (rsmd.getColumnType(i) == java.sql.Types.FLOAT) {
                    builder.append(rs.getFloat(column_name));

                } else if (rsmd.getColumnType(i) == java.sql.Types.INTEGER) {
                    builder.append(rs.getInt(column_name));

                } else if (rsmd.getColumnType(i) == java.sql.Types.NVARCHAR) {
                    builder.append(rs.getNString(column_name));

                } else if (rsmd.getColumnType(i) == java.sql.Types.VARCHAR) {
                    //                        temp = rs.getString(column_name); //saving column data to temp variable
                    //                        temp = ESAPI.encoder().canonicalize(temp); //decoding data to base state
                    //                        temp = ESAPI.encoder().encodeForHTML(temp); //encoding to be browser safe
                    //                        obj.put(column_name, temp); //putting data into JSON object
                    //                    
                    builder.append(rs.getNString(column_name));

                } else if (rsmd.getColumnType(i) == java.sql.Types.TINYINT) {
                    builder.append(rs.getInt(column_name));

                } else if (rsmd.getColumnType(i) == java.sql.Types.SMALLINT) {
                    builder.append(rs.getInt(column_name));

                } else if (rsmd.getColumnType(i) == java.sql.Types.DATE) {
                    builder.append(rs.getDate(column_name));

                } else if (rsmd.getColumnType(i) == java.sql.Types.TIME) {
                    builder.append(rs.getTime(column_name));

                } else if (rsmd.getColumnType(i) == java.sql.Types.TIMESTAMP) {
                    builder.append(rs.getTimestamp(column_name));

                } else if (rsmd.getColumnType(i) == java.sql.Types.NUMERIC) {
                    builder.append(rs.getBigDecimal(column_name));

                } else {
                    builder.append(rs.getObject(column_name));

                }
            } //end foreach
            list.add(builder.toString());
        } //end while
    } catch (Exception e) {
        e.printStackTrace();
    }
    return list; //return String list

}

From source file:com.streamsets.pipeline.stage.origin.jdbc.JdbcSource.java

private void validateResultSetMetadata(List<ConfigIssue> issues, Source.Context context, ResultSet rs) {
    Set<String> allTables = new HashSet<>();
    try {/*from  w  ww .  ja v  a  2  s. co m*/
        Set<String> columnLabels = new HashSet<>();
        ResultSetMetaData metadata = rs.getMetaData();
        int columnIdx = metadata.getColumnCount() + 1;
        while (--columnIdx > 0) {
            String columnLabel = metadata.getColumnLabel(columnIdx);
            if (columnLabels.contains(columnLabel)) {
                issues.add(
                        context.createConfigIssue(Groups.JDBC.name(), QUERY, JdbcErrors.JDBC_31, columnLabel));
            } else {
                columnLabels.add(columnLabel);
            }
            allTables.add(metadata.getTableName(columnIdx));
        }
        if (!StringUtils.isEmpty(offsetColumn) && offsetColumn.contains(".")) {
            issues.add(context.createConfigIssue(Groups.JDBC.name(), OFFSET_COLUMN, JdbcErrors.JDBC_32,
                    offsetColumn));
        } else {
            rs.findColumn(offsetColumn);
        }
    } catch (SQLException e) {
        // Log a warning instead of an error because some implementations such as Oracle have implicit
        // "columns" such as ROWNUM that won't appear as part of the result set.
        LOG.warn(JdbcErrors.JDBC_33.getMessage(), offsetColumn, query);
        LOG.warn(jdbcUtil.formatSqlException(e));
    }
    tableNames = StringUtils.join(allTables, ", ");
}

From source file:com.tascape.reactor.report.MySqlBaseBean.java

public void importJson(JSONObject json) throws NamingException, SQLException {
    JSONObject sr = json.getJSONObject("suite_result");
    String srid = sr.getString(SuiteResult.SUITE_RESULT_ID);
    LOG.debug("srid {}", srid);

    try (Connection conn = this.getConnection()) {
        String sql = "SELECT * FROM " + SuiteResult.TABLE_NAME + " WHERE " + SuiteResult.SUITE_RESULT_ID
                + " = ?;";
        PreparedStatement stmt = conn.prepareStatement(sql, ResultSet.TYPE_SCROLL_SENSITIVE,
                ResultSet.CONCUR_UPDATABLE);
        stmt.setString(1, srid);// w w  w. j a  v a 2 s  .c  o m
        ResultSet rs = stmt.executeQuery();
        ResultSetMetaData rsmd = rs.getMetaData();
        if (rs.first()) {
            LOG.debug("already imported {}", srid);
            return;
        }
        rs.moveToInsertRow();
        for (int col = 1; col <= rsmd.getColumnCount(); col++) {
            String cn = rsmd.getColumnLabel(col);
            rs.updateObject(cn, sr.opt(cn));
        }
        rs.insertRow();
        rs.last();
        rs.updateRow();
        LOG.debug("sr imported");
    }

    try (Connection conn = this.getConnection()) {
        String sql = "SELECT * FROM " + SuiteProperty.TABLE_NAME + " WHERE " + SuiteProperty.SUITE_RESULT_ID
                + " = ?;";
        PreparedStatement stmt = conn.prepareStatement(sql, ResultSet.TYPE_SCROLL_SENSITIVE,
                ResultSet.CONCUR_UPDATABLE);
        stmt.setString(1, srid);
        ResultSet rs = stmt.executeQuery();
        ResultSetMetaData rsmd = rs.getMetaData();

        JSONArray sps = sr.getJSONArray("suite_properties");
        int len = sps.length();
        for (int i = 0; i < len; i++) {
            rs.moveToInsertRow();
            JSONObject tr = sps.getJSONObject(i);
            for (int col = 1; col <= rsmd.getColumnCount(); col++) {
                String cn = rsmd.getColumnLabel(col);
                if (SuiteProperty.SUITE_PROPERTY_ID.equals(cn)) {
                    continue;
                }
                rs.updateObject(cn, tr.get(cn));
            }
            rs.insertRow();
            rs.last();
            rs.updateRow();
        }
        LOG.debug("sps imported");
    }

    JSONArray trs = sr.getJSONArray("case_results");
    int len = trs.length();

    try (Connection conn = this.getConnection()) {
        String sql = String.format("SELECT * FROM %s WHERE %s=? AND %s=? AND %s=? AND %s=? AND %s=?;",
                TaskCase.TABLE_NAME, TaskCase.SUITE_CLASS, TaskCase.CASE_CLASS, TaskCase.CASE_METHOD,
                TaskCase.CASE_DATA_INFO, TaskCase.CASE_DATA);
        PreparedStatement stmt = conn.prepareStatement(sql, ResultSet.TYPE_SCROLL_SENSITIVE,
                ResultSet.CONCUR_UPDATABLE);
        stmt.setMaxRows(1);
        for (int i = 0; i < len; i++) {
            JSONObject tr = trs.getJSONObject(i);
            stmt.setString(1, tr.getString(TaskCase.SUITE_CLASS));
            stmt.setString(2, tr.getString(TaskCase.CASE_CLASS));
            stmt.setString(3, tr.getString(TaskCase.CASE_METHOD));
            stmt.setString(4, tr.getString(TaskCase.CASE_DATA_INFO));
            stmt.setString(5, tr.getString(TaskCase.CASE_DATA));
            ResultSet rs = stmt.executeQuery();
            if (!rs.first()) {
                rs.moveToInsertRow();
                rs.updateString(TaskCase.SUITE_CLASS, tr.getString(TaskCase.SUITE_CLASS));
                rs.updateString(TaskCase.CASE_CLASS, tr.getString(TaskCase.CASE_CLASS));
                rs.updateString(TaskCase.CASE_METHOD, tr.getString(TaskCase.CASE_METHOD));
                rs.updateString(TaskCase.CASE_DATA_INFO, tr.getString(TaskCase.CASE_DATA_INFO));
                rs.updateString(TaskCase.CASE_DATA, tr.getString(TaskCase.CASE_DATA));
                rs.insertRow();
                rs.last();
                rs.updateRow();
                rs = stmt.executeQuery();
                rs.first();
            }
            tr.put(TaskCase.TASK_CASE_ID, rs.getLong(TaskCase.TASK_CASE_ID));
        }
        LOG.debug("tcid updated");
    }

    try (Connection conn = this.getConnection()) {
        String sql = "SELECT * FROM " + CaseResult.TABLE_NAME + " WHERE " + CaseResult.SUITE_RESULT + " = ?;";
        PreparedStatement stmt = conn.prepareStatement(sql, ResultSet.TYPE_SCROLL_SENSITIVE,
                ResultSet.CONCUR_UPDATABLE);
        stmt.setString(1, srid);
        ResultSet rs = stmt.executeQuery();
        ResultSetMetaData rsmd = rs.getMetaData();
        for (int i = 0; i < len; i++) {
            rs.moveToInsertRow();
            JSONObject tr = trs.getJSONObject(i);
            for (int col = 1; col <= rsmd.getColumnCount(); col++) {
                String cn = rsmd.getColumnLabel(col);
                rs.updateObject(cn, tr.opt(cn));
            }
            rs.insertRow();
            rs.last();
            rs.updateRow();
        }
        LOG.debug("crs imported");
    }

    try (Connection conn = this.getConnection()) {
        String sql = "SELECT * FROM " + CaseResultMetric.TABLE_NAME + ";";
        PreparedStatement stmt = conn.prepareStatement(sql, ResultSet.TYPE_SCROLL_SENSITIVE,
                ResultSet.CONCUR_UPDATABLE);
        stmt.setMaxRows(1);
        ResultSet rs = stmt.executeQuery();
        ResultSetMetaData rsmd = rs.getMetaData();
        for (int i = 0; i < len; i++) {
            JSONArray jarr = trs.getJSONObject(i).optJSONArray("CASE_result_metrics");
            if (jarr == null) {
                continue;
            }
            int l = jarr.length();
            for (int j = 0; j < l; j++) {
                JSONObject trm = jarr.getJSONObject(j);
                rs.moveToInsertRow();
                for (int col = 1; col <= rsmd.getColumnCount(); col++) {
                    String cn = rsmd.getColumnLabel(col);
                    if (cn.equals(CaseResultMetric.CASE_RESULT_METRIC_ID)) {
                        continue;
                    }
                    rs.updateObject(cn, trm.get(cn));
                }
                rs.insertRow();
                rs.last();
                rs.updateRow();
            }
        }
        LOG.debug("crms imported");
    }
}

From source file:com.groupon.odo.proxylib.SQLService.java

/**
 * Gets the first row for a query/* w w  w . j ava2s.  c  o m*/
 *
 * @param query
 * @return result or NULL
 */
public HashMap<String, Object> getFirstResult(String query) throws Exception {
    HashMap<String, Object> result = null;

    Statement queryStatement = null;
    ResultSet results = null;
    try (Connection sqlConnection = getConnection()) {
        queryStatement = sqlConnection.createStatement();
        results = queryStatement.executeQuery(query);
        if (results.next()) {
            result = new HashMap<String, Object>();
            String[] columns = getColumnNames(results.getMetaData());

            for (String column : columns) {
                result.put(column, results.getObject(column));
            }
        }
    } catch (Exception e) {

    } finally {
        try {
            if (results != null) {
                results.close();
            }
        } catch (Exception e) {
        }
        try {
            if (queryStatement != null) {
                queryStatement.close();
            }
        } catch (Exception e) {
        }
    }

    return result;
}

From source file:madgik.exareme.master.queryProcessor.analyzer.stat.Stat.java

@Override
public Map<String, Table> extractStats() throws Exception {

    DatabaseMetaData dbmd = con.getMetaData(); // dtabase metadata object

    // listing tables and columns
    String catalog = null;//w  ww . java2 s  . c  o  m
    String schemaPattern = null;
    String tableNamePattern = null;
    String[] types = null;
    String columnNamePattern = null;

    ResultSet resultTables = dbmd.getTables(catalog, schemaPattern, tableNamePattern, types);
    log.debug("Starting extracting stats");
    while (resultTables.next()) {
        Map<String, Column> columnMap = new HashMap<String, Column>();
        String tableName = StringEscapeUtils.escapeJava(resultTables.getString(3));
        log.debug("Analyzing table " + tableName);

        int columnCount = resultTables.getMetaData().getColumnCount();
        int toupleSize = 0; // in bytes

        tableNamePattern = tableName;
        ResultSet resultColumns = dbmd.getColumns(catalog, schemaPattern, tableNamePattern, columnNamePattern);

        int count = OptiqueAnalyzer.getCountFor(tableName, sch);

        if (count == 0) {
            log.debug("Empty table");
            continue;
        }

        while (resultColumns.next()) {

            String columnName = StringEscapeUtils.escapeJava(resultColumns.getString(4));
            int columnType = resultColumns.getInt(5);

            // computing column's size in bytes
            int columnSize = computeColumnSize(columnName, columnType, tableName);
            toupleSize += columnSize;

            // execute queries for numberOfDiffValues, minVal, maxVal
            Map<String, Integer> diffValFreqMap = new HashMap<String, Integer>();

            // computing column's min and max values
            MinMax mm = computeMinMax(tableName, columnName);
            String minVal = mm.getMin();
            String maxVal = mm.getMax();

            // /
            List<ValFreq> freqs = computeDistinctValuesFrequency(tableName, columnName);

            for (ValFreq k : freqs) {
                diffValFreqMap.put(k.getVal(), k.getFreq());

            }

            // /add min max diff vals in the sampling values
            int minOcc = computeValOccurences(tableName, columnName, minVal);
            if (!diffValFreqMap.containsKey(minVal))
                diffValFreqMap.put(minVal, minOcc);
            int maxOcc = computeValOccurences(tableName, columnName, maxVal);
            if (!diffValFreqMap.containsKey(maxVal))
                diffValFreqMap.put(maxVal, maxOcc);

            int diffVals = diffValFreqMap.size();

            Column c = new Column(columnName, columnType, columnSize, diffVals, minVal, maxVal, diffValFreqMap);
            columnMap.put(columnName, c);

        }

        ResultSet pkrs = dbmd.getExportedKeys("", "", tableName);
        String pkey = "DEFAULT_KEY";

        while (pkrs.next()) {
            pkey = pkrs.getString("PKCOLUMN_NAME");
            break;
        }

        Table t = new Table(tableName, columnCount, toupleSize, columnMap, count, pkey);
        schema.put(tableName, t);

    }

    return schema;

}

From source file:computer_store.GUI.java

/**
 * Takes a JTable and a ResultSet as parameters and populates the JTable with the supplied ResultSet
 * @param table//w w w . ja va 2 s  . com
 * @param rs 
 */
private void fillTable(javax.swing.JTable table, java.sql.ResultSet rs) {
    try {

        //To remove previously added rows
        while (table.getRowCount() > 0) {
            ((javax.swing.table.DefaultTableModel) table.getModel()).removeRow(0);
        }
        int columns = rs.getMetaData().getColumnCount();
        Object[] ids = new Object[columns];
        while (rs.next()) {
            Object[] row = new Object[columns];
            for (int i = 1; i <= columns; i++) {
                row[i - 1] = rs.getObject(i);
            }
            ((javax.swing.table.DefaultTableModel) table.getModel()).insertRow(rs.getRow() - 1, row);
        }
        for (int i = 1; i <= columns; i++) {
            ids[i - 1] = rs.getMetaData().getColumnName(i);
        }
        ((javax.swing.table.DefaultTableModel) table.getModel()).setColumnIdentifiers(ids);
        rs.close();
    } catch (Exception e) {
        System.out.print(e);
    }
}

From source file:com.micromux.cassandra.jdbc.JdbcRegressionTest.java

/**
 * Verify that even with an empty ResultSet; the resultset meta-data can still
 * be queried. Previously, this was <i>Issue 75</i>.
 *///from   www. j a va  2 s.c  om
@Test
public void testEmptyResultSet() throws Exception {

    Statement stmt = con.createStatement();

    String truncate = "TRUNCATE regressiontest;";
    stmt.execute(truncate);

    String select = "select ivalue from " + TABLE;

    ResultSet result = stmt.executeQuery(select);
    assertFalse("Make sure we have no rows", result.next());
    ResultSetMetaData rsmd = result.getMetaData();
    assertTrue("Make sure we do get a result", rsmd.getColumnDisplaySize(1) != 0);
    assertNotNull("Make sure we do get a label", rsmd.getColumnLabel(1));
    System.out.println(
            "Found a column in ResultsetMetaData even when there are no rows:   " + rsmd.getColumnLabel(1));
    stmt.close();
}

From source file:com.micromux.cassandra.jdbc.JdbcRegressionTest.java

/**
 * Create a column group and confirm that the {@code ResultSetMetaData} works.
 *//*  ww  w .  j av  a  2s.  c o  m*/
@Test
public void testResultSetMetaData() throws Exception {

    Statement stmt = con.createStatement();

    // Create the target Column family
    String createCF = "CREATE COLUMNFAMILY t33 (k int PRIMARY KEY," + "c text " + ") ;";

    stmt.execute(createCF);
    stmt.close();
    con.close();

    // open it up again to see the new CF
    con = DriverManager
            .getConnection(String.format("jdbc:cassandra://%s:%d/%s?%s", HOST, PORT, KEYSPACE, OPTIONS));

    // paraphrase of the snippet from the ISSUE #33 provided test
    PreparedStatement statement = con.prepareStatement("update t33 set c=? where k=123");
    statement.setString(1, "mark");
    statement.executeUpdate();

    ResultSet result = statement.executeQuery("SELECT k, c FROM t33;");

    ResultSetMetaData metadata = result.getMetaData();

    int colCount = metadata.getColumnCount();

    System.out.println("Test Issue #33");
    DatabaseMetaData md = con.getMetaData();
    System.out.println();
    System.out.println("--------------");
    System.out.println("Driver Version :   " + md.getDriverVersion());
    System.out.println("DB Version     :   " + md.getDatabaseProductVersion());
    System.out.println("Catalog term   :   " + md.getCatalogTerm());
    System.out.println("Catalog        :   " + con.getCatalog());
    System.out.println("Schema term    :   " + md.getSchemaTerm());

    System.out.println("--------------");
    while (result.next()) {
        metadata = result.getMetaData();
        colCount = metadata.getColumnCount();

        assertEquals("Total column count should match schema for t33", 2, metadata.getColumnCount());

        System.out.printf("(%d) ", result.getRow());
        for (int i = 1; i <= colCount; i++) {
            System.out.print(showColumn(i, result) + " ");

            switch (i) {
            case 1:
                assertEquals("First Column: k", "k", metadata.getColumnName(1));
                assertEquals("First Column Type: int", Types.INTEGER, metadata.getColumnType(1));
                break;
            case 2:
                assertEquals("Second Column: c", "c", metadata.getColumnName(2));
                assertEquals("Second Column Type: text", Types.NVARCHAR, metadata.getColumnType(2));
                break;
            }
        }
        System.out.println();
    }
}