Example usage for java.sql ParameterMetaData isSigned

Introduction

In this page you can find the example usage for java.sql ParameterMetaData isSigned.

Prototype

boolean isSigned(int param) throws SQLException;

Source Link

Document

Retrieves whether values for the designated parameter can be signed numbers.

Usage

From source file:Main.java

public static void main(String[] args) throws Exception {
    Connection conn = getConnection();
    Statement st = conn.createStatement();

    st.executeUpdate("create table survey (id int,name varchar(30));");

    String sql = "INSERT INTO survey (id) VALUES(?)";
    PreparedStatement pstmt = conn.prepareStatement(sql);
    ParameterMetaData pmd = pstmt.getParameterMetaData();

    int totalDigits = pmd.getPrecision(1);
    int digitsAfterDecimal = pmd.getScale(1);
    boolean b = pmd.isSigned(1);
    System.out.println("The first parameter ");
    System.out.println("    has precision " + totalDigits);
    System.out.println("    has scale " + digitsAfterDecimal);
    System.out.println("    may be a signed number " + b);

    int count = pmd.getParameterCount();
    System.out.println("count is " + count);

    for (int i = 1; i <= count; i++) {
        int type = pmd.getParameterType(i);
        String typeName = pmd.getParameterTypeName(i);
        System.out.println("Parameter " + i + ":");
        System.out.println("    type is " + type);
        System.out.println("    type name is " + typeName);
    }/* w  w w  .j  a  v  a2 s.c  om*/

    st.close();
    conn.close();
}

---

From source file:GetParamMetaData.java

public static void main(String args[]) {

    String url = "jdbc:mySubprotocol:myDataSource";

    Connection con;//  www . ja  v  a 2s .c o  m
    PreparedStatement pstmt;
    ParameterMetaData pmd;

    String sql = "UPDATE COFFEES SET SALES = ? " + "WHERE COF_NAME = ?";

    try {

        Class.forName("myDriver.ClassName");

    } catch (java.lang.ClassNotFoundException e) {
        System.err.print("ClassNotFoundException: ");
        System.err.println(e.getMessage());
    }

    try {

        con = DriverManager.getConnection(url, "myLogin", "myPassword");

        pstmt = con.prepareStatement(sql);

        pmd = pstmt.getParameterMetaData();

        int totalDigits = pmd.getPrecision(1);
        int digitsAfterDecimal = pmd.getScale(1);
        boolean b = pmd.isSigned(1);
        System.out.println("The first parameter ");
        System.out.println("    has precision " + totalDigits);
        System.out.println("    has scale " + digitsAfterDecimal);
        System.out.println("    may be a signed number " + b);

        int count = pmd.getParameterCount();
        System.out.println("count is " + count);

        for (int i = 1; i <= count; i++) {
            int type = pmd.getParameterType(i);
            String typeName = pmd.getParameterTypeName(i);
            System.out.println("Parameter " + i + ":");
            System.out.println("    type is " + type);
            System.out.println("    type name is " + typeName);
        }

        pstmt.close();
        con.close();

    } catch (Exception e) {
        e.printStackTrace();

    }
}

---

From source file:com.alibaba.wasp.jdbc.TestPreparedStatement.java

public void testParameterMetaData() throws SQLException {
    PreparedStatement prep = conn.prepareStatement("SELECT ?, ?, ? FROM DUAL");
    ParameterMetaData pm = prep.getParameterMetaData();
    assertEquals("java.lang.String", pm.getParameterClassName(1));
    assertEquals("VARCHAR", pm.getParameterTypeName(1));
    assertEquals(3, pm.getParameterCount());
    assertEquals(ParameterMetaData.parameterModeIn, pm.getParameterMode(1));
    assertEquals(Types.VARCHAR, pm.getParameterType(1));
    assertEquals(0, pm.getPrecision(1));
    assertEquals(0, pm.getScale(1));/*  www  . j a  v a 2  s  .c  om*/
    assertEquals(ResultSetMetaData.columnNullableUnknown, pm.isNullable(1));
    assertEquals(pm.isSigned(1), true);
    assertThrows(SQLErrorCode.INVALID_VALUE_2, pm).getPrecision(0);
    assertThrows(SQLErrorCode.INVALID_VALUE_2, pm).getPrecision(4);
    prep.close();
    assertThrows(SQLErrorCode.OBJECT_CLOSED, pm).getPrecision(1);

    Statement stat = conn.createStatement();
    stat.execute("CREATE TABLE TEST3(ID INT, NAME VARCHAR(255), DATA DECIMAL(10,2))");
    PreparedStatement prep1 = conn.prepareStatement("UPDATE TEST3 SET ID=?, NAME=?, DATA=?");
    PreparedStatement prep2 = conn.prepareStatement("INSERT INTO TEST3 VALUES(?, ?, ?)");
    checkParameter(prep1, 1, "java.lang.Integer", 4, "INTEGER", 10, 0);
    checkParameter(prep1, 2, "java.lang.String", 12, "VARCHAR", 255, 0);
    checkParameter(prep1, 3, "java.math.BigDecimal", 3, "DECIMAL", 10, 2);
    checkParameter(prep2, 1, "java.lang.Integer", 4, "INTEGER", 10, 0);
    checkParameter(prep2, 2, "java.lang.String", 12, "VARCHAR", 255, 0);
    checkParameter(prep2, 3, "java.math.BigDecimal", 3, "DECIMAL", 10, 2);
    PreparedStatement prep3 = conn
            .prepareStatement("SELECT * FROM TEST3 WHERE ID=? AND NAME LIKE ? AND ?>DATA");
    checkParameter(prep3, 1, "java.lang.Integer", 4, "INTEGER", 10, 0);
    checkParameter(prep3, 2, "java.lang.String", 12, "VARCHAR", 0, 0);
    checkParameter(prep3, 3, "java.math.BigDecimal", 3, "DECIMAL", 10, 2);
    stat.execute("DROP TABLE TEST3");
}

---

From source file:org.apache.calcite.avatica.jdbc.JdbcMeta.java

/**
 * Converts from JDBC metadata to AvaticaParameters
 *//* w ww.  j  a  va  2s.c  om*/
protected static List<AvaticaParameter> parameters(ParameterMetaData metaData) throws SQLException {
    if (metaData == null) {
        return Collections.emptyList();
    }
    final List<AvaticaParameter> params = new ArrayList<>();
    for (int i = 1; i <= metaData.getParameterCount(); i++) {
        params.add(new AvaticaParameter(metaData.isSigned(i), metaData.getPrecision(i), metaData.getScale(i),
                metaData.getParameterType(i), metaData.getParameterTypeName(i),
                metaData.getParameterClassName(i), "?" + i));
    }
    return params;
}

---