Package org.openrdf.sail.rdbms.algebra

Examples of org.openrdf.sail.rdbms.algebra.SqlCase

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  public void meet(LangMatches node)
    throws UnsupportedRdbmsOperatorException
  {
    ValueExpr left = node.getLeftArg();
    ValueExpr right = node.getRightArg();
    SqlCase sqlCase = new SqlCase();
    sqlCase.when(eq(label(right), str("*")), neq(label(left), str("")));
    SqlExpr pattern = concat(lowercase(label(right)), str("%"));
    sqlCase.when(new TrueValue(), like(label(left), pattern));
    result = sqlCase;
  }
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  private SqlExpr effectiveBooleanValue(ValueExpr v)
    throws UnsupportedRdbmsOperatorException
  {
    String bool = XMLSchema.BOOLEAN.stringValue();
    SqlCase sqlCase = new SqlCase();
    sqlCase.when(eq(type(v), str(bool)), eq(label(v), str("true")));
    sqlCase.when(simple(type(v)), not(eq(label(v), str(""))));
    sqlCase.when(isNotNull(numeric(v)), not(eq(numeric(v), num(0))));
    return sqlCase;
  }
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  private SqlExpr equal(ValueExpr left, ValueExpr right)
    throws UnsupportedRdbmsOperatorException
  {
    SqlExpr bnodes = eq(bNode(left), bNode(right));
    SqlExpr uris = eq(uri(left), uri(right));
    SqlCase scase = new SqlCase();
    scase.when(or(isNotNull(bNode(left)), isNotNull(bNode(right))), bnodes);
    scase.when(or(isNotNull(uri(left)), isNotNull(uri(right))), uris);
    return literalEqual(left, right, scase);
  }
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  private SqlExpr termsEqual(ValueExpr left, ValueExpr right)
    throws UnsupportedRdbmsOperatorException
  {
    SqlExpr bnodes = eqIfNotNull(bNode(left), bNode(right));
    SqlExpr uris = eqIfNotNull(uri(left), uri(right));
    SqlCase scase = new SqlCase();
    scase.when(or(isNotNull(bNode(left)), isNotNull(bNode(right))), bnodes);
    scase.when(or(isNotNull(uri(left)), isNotNull(uri(right))), uris);
    return literalEqual(left, right, scase);
  }
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  @Override
  public void meet(Datatype node)
    throws UnsupportedRdbmsOperatorException
  {
    SqlCase sqlCase = new SqlCase();
    sqlCase.when(isNotNull(type(node.getArg())), type(node.getArg()));
    sqlCase.when(and(isNull(lang(node.getArg())), isNotNull(label(node.getArg()))),
        str(XMLSchema.STRING.stringValue()));
    result = sqlCase;
  }
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    throws UnsupportedRdbmsOperatorException
  {
    boolean divide = node.getParentNode().equals(MathExpr.MathOp.DIVIDE);
    ValueExpr left = node.getLeftArg();
    ValueExpr right = node.getRightArg();
    SqlCase sqlCase = new SqlCase();
    sqlCase.when(in(str(DOUBLE), type(left), type(right)), str(DOUBLE));
    sqlCase.when(in(str(FLOAT), type(left), type(right)), str(FLOAT));
    sqlCase.when(in(str(DECIMAL), type(left), type(right)), str(DECIMAL));
    sqlCase.when(new TrueValue(), divide ? str(DECIMAL) : str(INTEGER));
    result = sqlCase;
  }
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  public static SqlExpr cmp(SqlExpr left, CompareOp op, SqlExpr right) {
    return new SqlCompare(left, op, right);
  }

  public static SqlExpr coalesce(SqlExpr... exprs) {
    SqlCase sqlCase = new SqlCase();
    for (SqlExpr expr : exprs) {
      sqlCase.when(isNotNull(expr.clone()), expr);
    }
    return sqlCase;
  }
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      replace(node, new FalseValue());
    }
    else if (arg instanceof SqlCase) {
      SqlExpr rep = null;
      SqlExpr prev = null;
      SqlCase scase = (SqlCase)arg;
      for (Entry entry : scase.getEntries()) {
        SqlExpr condition = entry.getCondition();
        if (rep == null) {
          rep = and(condition.clone(), isNull(entry.getResult().clone()));
          prev = not(condition.clone());
        }
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Related Classes of org.openrdf.sail.rdbms.algebra.SqlCase

  • org.openrdf.sail.rdbms.algebra.base.SqlExprSupport
  • org.openrdf.sail.rdbms.algebra.factories.BooleanExprFactory
  • org.openrdf.sail.rdbms.algebra.factories.DatatypeExprFactory
  • org.openrdf.sail.rdbms.algebra.factories.LabelExprFactory
  • org.openrdf.sail.rdbms.algebra.factories.URIExprFactory
  • org.openrdf.sail.rdbms.optimizers.SqlConstantOptimizer
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