Example usage for java.sql DatabaseMetaData getNumericFunctions

Introduction

In this page you can find the example usage for java.sql DatabaseMetaData getNumericFunctions.

Prototype

String getNumericFunctions() throws SQLException;

Source Link

Document

Retrieves a comma-separated list of math functions available with this database.

Usage

From source file:org.apache.zeppelin.mysql.SqlCompleter.java

public static Set<String> getSqlKeywordsCompletions(Connection connection) throws IOException, SQLException {

    // Add the default SQL completions
    String keywords = new BufferedReader(
            new InputStreamReader(SqlCompleter.class.getResourceAsStream("/ansi.sql.keywords"))).readLine();

    DatabaseMetaData metaData = connection.getMetaData();

    // Add the driver specific SQL completions
    String driverSpecificKeywords = "/" + metaData.getDriverName().replace(" ", "-").toLowerCase()
            + "-sql.keywords";

    logger.info("JDBC DriverName:" + driverSpecificKeywords);

    if (SqlCompleter.class.getResource(driverSpecificKeywords) != null) {
        String driverKeywords = new BufferedReader(
                new InputStreamReader(SqlCompleter.class.getResourceAsStream(driverSpecificKeywords)))
                        .readLine();//  w ww .ja  va2 s.  c  o  m
        keywords += "," + driverKeywords.toUpperCase();
    }

    Set<String> completions = new TreeSet<>();

    // Add the keywords from the current JDBC connection
    try {
        keywords += "," + metaData.getSQLKeywords();
    } catch (Exception e) {
        logger.debug("fail to get SQL key words from database metadata: " + e, e);
    }
    try {
        keywords += "," + metaData.getStringFunctions();
    } catch (Exception e) {
        logger.debug("fail to get string function names from database metadata: " + e, e);
    }
    try {
        keywords += "," + metaData.getNumericFunctions();
    } catch (Exception e) {
        logger.debug("fail to get numeric function names from database metadata: " + e, e);
    }
    try {
        keywords += "," + metaData.getSystemFunctions();
    } catch (Exception e) {
        logger.debug("fail to get system function names from database metadata: " + e, e);
    }
    try {
        keywords += "," + metaData.getTimeDateFunctions();
    } catch (Exception e) {
        logger.debug("fail to get time date function names from database metadata: " + e, e);
    }

    // Also allow lower-case versions of all the keywords
    keywords += "," + keywords.toLowerCase();

    StringTokenizer tok = new StringTokenizer(keywords, ", ");
    while (tok.hasMoreTokens()) {
        completions.add(tok.nextToken());
    }

    return completions;
}

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From source file:org.apache.zeppelin.postgresql.SqlCompleter.java

public static Set<String> getSqlKeywordsCompletions(Connection connection) throws IOException, SQLException {

    // Add the default SQL completions
    String keywords = new BufferedReader(
            new InputStreamReader(SqlCompleter.class.getResourceAsStream("/ansi.sql.keywords"))).readLine();

    DatabaseMetaData metaData = connection.getMetaData();

    // Add the driver specific SQL completions
    String driverSpecificKeywords = "/" + metaData.getDriverName().replace(" ", "-").toLowerCase()
            + "-sql.keywords";

    logger.info("JDBC DriverName:" + driverSpecificKeywords);

    if (SqlCompleter.class.getResource(driverSpecificKeywords) != null) {
        String driverKeywords = new BufferedReader(
                new InputStreamReader(SqlCompleter.class.getResourceAsStream(driverSpecificKeywords)))
                        .readLine();//from   ww  w .j  a  v a  2s  .  c  o m
        keywords += "," + driverKeywords.toUpperCase();
    }

    Set<String> completions = new TreeSet<String>();

    // Add the keywords from the current JDBC connection
    try {
        keywords += "," + metaData.getSQLKeywords();
    } catch (Exception e) {
        logger.debug("fail to get SQL key words from database metadata: " + e, e);
    }
    try {
        keywords += "," + metaData.getStringFunctions();
    } catch (Exception e) {
        logger.debug("fail to get string function names from database metadata: " + e, e);
    }
    try {
        keywords += "," + metaData.getNumericFunctions();
    } catch (Exception e) {
        logger.debug("fail to get numeric function names from database metadata: " + e, e);
    }
    try {
        keywords += "," + metaData.getSystemFunctions();
    } catch (Exception e) {
        logger.debug("fail to get system function names from database metadata: " + e, e);
    }
    try {
        keywords += "," + metaData.getTimeDateFunctions();
    } catch (Exception e) {
        logger.debug("fail to get time date function names from database metadata: " + e, e);
    }

    // Also allow lower-case versions of all the keywords
    keywords += "," + keywords.toLowerCase();

    StringTokenizer tok = new StringTokenizer(keywords, ", ");
    while (tok.hasMoreTokens()) {
        completions.add(tok.nextToken());
    }

    return completions;
}

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From source file:org.executequery.gui.editor.autocomplete.AutoCompleteSelectionsFactory.java

private void databaseSystemFunctionsForHost(DatabaseHost databaseHost,
        List<AutoCompleteListItem> listSelections) {

    trace("Building autocomplete object list using [ " + databaseHost.getName()
            + " ] for type - SYSTEM_FUNCTION");

    ResultSet rs = null;//from   w  ww.  j a  v  a2 s. c  om
    DatabaseMetaData databaseMetaData = databaseHost.getDatabaseMetaData();

    try {

        List<String> tableNames = new ArrayList<String>();

        extractNames(tableNames, databaseMetaData.getStringFunctions());
        extractNames(tableNames, databaseMetaData.getNumericFunctions());
        extractNames(tableNames, databaseMetaData.getTimeDateFunctions());

        addKeywordsFromList(tableNames, listSelections, DATABASE_SYSTEM_FUNCTION_DESCRIPTION,
                AutoCompleteListItemType.SYSTEM_FUNCTION);

    } catch (SQLException e) {

        error("Values not available for type SYSTEM_FUNCTION - driver returned: " + e.getMessage());

    } finally {

        releaseResources(rs);
        trace("Finished autocomplete object list using [ " + databaseHost.getName()
                + " ] for type - SYSTEM_FUNCTION");
    }

}

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From source file:org.talend.core.model.metadata.builder.database.ExtractMetaDataUtils.java

private List<String> getAllDBFuctions(DatabaseMetaData dbMetadata) {
    List<String> functionlist = new ArrayList<String>();
    if (dbMetadata == null) {
        return functionlist;
    }//  w  w w  . j ava  2  s.  com
    try {
        final String CommaSplit = ",\\s*"; //$NON-NLS-1$

        String[] systemFunctions = null;
        if (dbMetadata.getSystemFunctions() != null) {
            systemFunctions = dbMetadata.getSystemFunctions().split(CommaSplit);
        }
        String[] numericFunctions = null;
        if (dbMetadata.getNumericFunctions() != null) {
            numericFunctions = dbMetadata.getNumericFunctions().split(CommaSplit);
        }

        String[] stringFunctions = null;
        if (dbMetadata.getStringFunctions() != null) {
            stringFunctions = dbMetadata.getStringFunctions().split(CommaSplit);
        }

        String[] timeFunctions = null;
        if (dbMetadata.getTimeDateFunctions() != null) {
            timeFunctions = dbMetadata.getTimeDateFunctions().split(CommaSplit);
        }

        convertFunctions2Array(functionlist, systemFunctions);

        convertFunctions2Array(functionlist, numericFunctions);

        convertFunctions2Array(functionlist, stringFunctions);

        convertFunctions2Array(functionlist, timeFunctions);

    } catch (SQLException e) {
        ExceptionHandler.process(e);
    }
    return functionlist;
}

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