Example usage for java.sql ParameterMetaData getPrecision

Introduction

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

Prototype

int getPrecision(int param) throws SQLException;

Source Link

Document

Retrieves the designated parameter's specified column size.

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 va 2  s . c  o  m*/

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

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From source file:Main.java

public static void main(String[] args) throws Exception {
    Connection conn = getHSQLConnection();
    System.out.println("Got Connection.");
    Statement st = conn.createStatement();
    st.executeUpdate("create table survey (id int,name varchar);");
    st.executeUpdate("create view surveyView as (select * from survey);");
    st.executeUpdate("insert into survey (id,name ) values (1,'nameValue')");

    String query = "select * from survey where id > ? and name = ?";
    PreparedStatement pstmt = conn.prepareStatement(query);
    ParameterMetaData paramMetaData = pstmt.getParameterMetaData();
    if (paramMetaData == null) {
        System.out.println("db vendor does NOT support ParameterMetaData");
    } else {//from  www  .  ja  va 2  s . co m
        System.out.println("db vendor supports ParameterMetaData");
        int paramCount = paramMetaData.getParameterCount();
        System.out.println("paramCount=" + paramCount);
        System.out.println("-------------------");
        for (int param = 1; param <= paramCount; param++) {
            System.out.println("param number=" + param);
            System.out.println(paramMetaData.getPrecision(param));
        }
    }

    pstmt.close();
    conn.close();

}

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From source file:GetParamMetaData.java

public static void main(String args[]) {

    String url = "jdbc:mySubprotocol:myDataSource";

    Connection con;/*  ww w .j  a va  2s .com*/
    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();

    }
}

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From source file:com.tesora.dve.db.mysql.MysqlNative.java

@Override
public ColumnMetadata getParameterColumnInfo(ParameterMetaData pmd, int colIdx) throws SQLException {
    ColumnMetadata out = new ColumnMetadata();
    out.setDataType(pmd.getParameterType(colIdx));
    out.setPrecision(pmd.getPrecision(colIdx));
    out.setScale(pmd.getScale(colIdx));//w w  w  .  j  av a  2s  . c  om
    if (ParameterMetaData.parameterNullable == pmd.isNullable(colIdx))
        out.setNullable(Boolean.TRUE);
    out.setTypeName(NativeType.fixName(pmd.getParameterTypeName(colIdx)));
    return out;
}

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

private void checkParameter(PreparedStatement prep, int index, String className, int type, String typeName,
        int precision, int scale) throws SQLException {
    ParameterMetaData meta = prep.getParameterMetaData();
    assertEquals(className, meta.getParameterClassName(index));
    assertEquals(type, meta.getParameterType(index));
    assertEquals(typeName, meta.getParameterTypeName(index));
    assertEquals(precision, meta.getPrecision(index));
    assertEquals(scale, meta.getScale(index));
}

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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));/*from  w  w  w .  j a v  a  2s . c  o  m*/
    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");
}

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

/**
 * Converts from JDBC metadata to AvaticaParameters
 *//*from   w  ww  .ja v a  2  s .  co m*/
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;
}

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From source file:org.pentaho.di.core.database.Database.java

public RowMetaInterface getParameterMetaData(PreparedStatement ps) {
    RowMetaInterface par = new RowMeta();
    try {//w w w  . j  av a 2  s. com
        ParameterMetaData pmd = ps.getParameterMetaData();
        for (int i = 1; i <= pmd.getParameterCount(); i++) {
            String name = "par" + i;
            int sqltype = pmd.getParameterType(i);
            int length = pmd.getPrecision(i);
            int precision = pmd.getScale(i);
            ValueMeta val;

            switch (sqltype) {
            case java.sql.Types.CHAR:
            case java.sql.Types.VARCHAR:
                val = new ValueMeta(name, ValueMetaInterface.TYPE_STRING);
                break;
            case java.sql.Types.BIGINT:
            case java.sql.Types.INTEGER:
            case java.sql.Types.NUMERIC:
            case java.sql.Types.SMALLINT:
            case java.sql.Types.TINYINT:
                val = new ValueMeta(name, ValueMetaInterface.TYPE_INTEGER);
                break;
            case java.sql.Types.DECIMAL:
            case java.sql.Types.DOUBLE:
            case java.sql.Types.FLOAT:
            case java.sql.Types.REAL:
                val = new ValueMeta(name, ValueMetaInterface.TYPE_NUMBER);
                break;
            case java.sql.Types.DATE:
            case java.sql.Types.TIME:
            case java.sql.Types.TIMESTAMP:
                val = new ValueMeta(name, ValueMetaInterface.TYPE_DATE);
                break;
            case java.sql.Types.BOOLEAN:
            case java.sql.Types.BIT:
                val = new ValueMeta(name, ValueMetaInterface.TYPE_BOOLEAN);
                break;
            default:
                val = new ValueMeta(name, ValueMetaInterface.TYPE_NONE);
                break;
            }

            if (val.isNumeric() && (length > 18 || precision > 18)) {
                val = new ValueMeta(name, ValueMetaInterface.TYPE_BIGNUMBER);
            }

            par.addValueMeta(val);
        }
    } catch (AbstractMethodError e) {
        // Oops: probably the database or JDBC doesn't support it.
        return null;
    } catch (SQLException e) {
        return null;
    } catch (Exception e) {
        return null;
    }

    return par;
}

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