Examples with CalciteConnection org.apache.beam.vendor.calcite.v1_28_0.org.apache.calcite.jdbc.CalciteConnection used on opensource projects

Example 21 with CalciteConnection

use of org.apache.beam.vendor.calcite.v1_28_0.org.apache.calcite.jdbc.CalciteConnection in project calcite by apache.

the class TableFunctionTest method testTableFunction.

/**
 * Tests a table function with literal arguments.
 */
@Test
public void testTableFunction() throws SQLException, ClassNotFoundException {
    Connection connection = DriverManager.getConnection("jdbc:calcite:");
    CalciteConnection calciteConnection = connection.unwrap(CalciteConnection.class);
    SchemaPlus rootSchema = calciteConnection.getRootSchema();
    SchemaPlus schema = rootSchema.add("s", new AbstractSchema());
    final TableFunction table = TableFunctionImpl.create(Smalls.GENERATE_STRINGS_METHOD);
    schema.add("GenerateStrings", table);
    ResultSet resultSet = connection.createStatement().executeQuery("select *\n" + "from table(\"s\".\"GenerateStrings\"(5)) as t(n, c)\n" + "where char_length(c) > 3");
    assertThat(CalciteAssert.toString(resultSet), equalTo("N=4; C=abcd\n"));
}

Example 22 with CalciteConnection

use of org.apache.beam.vendor.calcite.v1_28_0.org.apache.calcite.jdbc.CalciteConnection in project calcite by apache.

the class TableFunctionTest method getConnectionWithMultiplyFunction.

private Connection getConnectionWithMultiplyFunction() throws ClassNotFoundException, SQLException {
    Connection connection = DriverManager.getConnection("jdbc:calcite:");
    CalciteConnection calciteConnection = connection.unwrap(CalciteConnection.class);
    SchemaPlus rootSchema = calciteConnection.getRootSchema();
    SchemaPlus schema = rootSchema.add("s", new AbstractSchema());
    final TableFunction table = TableFunctionImpl.create(Smalls.MULTIPLICATION_TABLE_METHOD);
    schema.add("multiplication", table);
    return connection;
}

Example 23 with CalciteConnection

use of org.apache.beam.vendor.calcite.v1_28_0.org.apache.calcite.jdbc.CalciteConnection in project calcite by apache.

the class TableFunctionTest method testScannableTableFunction.

/**
 * Tests a table function that implements {@link ScannableTable} and returns
 * a single column.
 */
@Test
public void testScannableTableFunction() throws SQLException, ClassNotFoundException {
    Connection connection = DriverManager.getConnection("jdbc:calcite:");
    CalciteConnection calciteConnection = connection.unwrap(CalciteConnection.class);
    SchemaPlus rootSchema = calciteConnection.getRootSchema();
    SchemaPlus schema = rootSchema.add("s", new AbstractSchema());
    final TableFunction table = TableFunctionImpl.create(Smalls.MAZE_METHOD);
    schema.add("Maze", table);
    final String sql = "select *\n" + "from table(\"s\".\"Maze\"(5, 3, 1))";
    ResultSet resultSet = connection.createStatement().executeQuery(sql);
    final String result = "S=abcde\n" + "S=xyz\n" + "S=generate(w=5, h=3, s=1)\n";
    assertThat(CalciteAssert.toString(resultSet), is(result));
}

Example 24 with CalciteConnection

use of org.apache.beam.vendor.calcite.v1_28_0.org.apache.calcite.jdbc.CalciteConnection in project calcite by apache.

the class TableFunctionTest method testMultipleScannableTableFunctionWithNamedParameters.

/**
 * As {@link #testScannableTableFunction()} but with named parameters.
 */
@Test
public void testMultipleScannableTableFunctionWithNamedParameters() throws SQLException, ClassNotFoundException {
    try (Connection connection = DriverManager.getConnection("jdbc:calcite:");
        Statement statement = connection.createStatement()) {
        CalciteConnection calciteConnection = connection.unwrap(CalciteConnection.class);
        SchemaPlus rootSchema = calciteConnection.getRootSchema();
        SchemaPlus schema = rootSchema.add("s", new AbstractSchema());
        final TableFunction table1 = TableFunctionImpl.create(Smalls.MAZE_METHOD);
        schema.add("Maze", table1);
        final TableFunction table2 = TableFunctionImpl.create(Smalls.MAZE2_METHOD);
        schema.add("Maze", table2);
        final TableFunction table3 = TableFunctionImpl.create(Smalls.MAZE3_METHOD);
        schema.add("Maze", table3);
        final String sql = "select *\n" + "from table(\"s\".\"Maze\"(5, 3, 1))";
        ResultSet resultSet = statement.executeQuery(sql);
        final String result = "S=abcde\n" + "S=xyz\n";
        assertThat(CalciteAssert.toString(resultSet), is(result + "S=generate(w=5, h=3, s=1)\n"));
        final String sql2 = "select *\n" + "from table(\"s\".\"Maze\"(WIDTH => 5, HEIGHT => 3, SEED => 1))";
        resultSet = statement.executeQuery(sql2);
        assertThat(CalciteAssert.toString(resultSet), is(result + "S=generate2(w=5, h=3, s=1)\n"));
        final String sql3 = "select *\n" + "from table(\"s\".\"Maze\"(HEIGHT => 3, WIDTH => 5))";
        resultSet = statement.executeQuery(sql3);
        assertThat(CalciteAssert.toString(resultSet), is(result + "S=generate2(w=5, h=3, s=null)\n"));
        final String sql4 = "select *\n" + "from table(\"s\".\"Maze\"(FOO => 'a'))";
        resultSet = statement.executeQuery(sql4);
        assertThat(CalciteAssert.toString(resultSet), is(result + "S=generate3(foo=a)\n"));
    }
}

Example 25 with CalciteConnection

use of org.apache.beam.vendor.calcite.v1_28_0.org.apache.calcite.jdbc.CalciteConnection in project calcite by apache.

the class TableFunctionTest method testTableFunctionCursorInputs.

/**
 * Tests a table function that takes cursor input.
 */
@Ignore("CannotPlanException: Node [rel#18:Subset#4.ENUMERABLE.[]] " + "could not be implemented")
@Test
public void testTableFunctionCursorInputs() throws SQLException, ClassNotFoundException {
    try (Connection connection = DriverManager.getConnection("jdbc:calcite:")) {
        CalciteConnection calciteConnection = connection.unwrap(CalciteConnection.class);
        SchemaPlus rootSchema = calciteConnection.getRootSchema();
        SchemaPlus schema = rootSchema.add("s", new AbstractSchema());
        final TableFunction table = TableFunctionImpl.create(Smalls.GENERATE_STRINGS_METHOD);
        schema.add("GenerateStrings", table);
        final TableFunction add = TableFunctionImpl.create(Smalls.PROCESS_CURSOR_METHOD);
        schema.add("process", add);
        final PreparedStatement ps = connection.prepareStatement("select *\n" + "from table(\"s\".\"process\"(2,\n" + "cursor(select * from table(\"s\".\"GenerateStrings\"(?)))\n" + ")) as t(u)\n" + "where u > 3");
        ps.setInt(1, 5);
        ResultSet resultSet = ps.executeQuery();
        // GenerateStrings returns 0..4, then 2 is added (process function),
        // thus 2..6, finally where u > 3 leaves just 4..6
        assertThat(CalciteAssert.toString(resultSet), equalTo("u=4\n" + "u=5\n" + "u=6\n"));
    }
}