How to use

values

method

in

io.prestosql.sql.QueryUtil

public static Query singleValueQuery(String columnName, boolean value)
{
  Relation values = values(row(value ? TRUE_LITERAL : FALSE_LITERAL));
  return simpleQuery(
      selectList(new AllColumns()),
      aliased(values, "t", ImmutableList.of(columnName)));
}

public static Query singleValueQuery(String columnName, boolean value)
{
  Relation values = values(row(value ? TRUE_LITERAL : FALSE_LITERAL));
  return simpleQuery(
      selectList(new AllColumns()),
      aliased(values, "t", ImmutableList.of(columnName)));
}

public static Query singleValueQuery(String columnName, String value)
{
  Relation values = values(row(new StringLiteral((value))));
  return simpleQuery(
      selectList(new AllColumns()),
      aliased(values, "t", ImmutableList.of(columnName)));
}

public static Query singleValueQuery(String columnName, String value)
{
  Relation values = values(row(new StringLiteral((value))));
  return simpleQuery(
      selectList(new AllColumns()),
      aliased(values, "t", ImmutableList.of(columnName)));
}

@Override
protected Node visitDescribeInput(DescribeInput node, Void context)
    throws SemanticException
{
  String sqlString = session.getPreparedStatement(node.getName().getValue());
  Statement statement = parser.createStatement(sqlString, createParsingOptions(session));
  // create  analysis for the query we are describing.
  Analyzer analyzer = new Analyzer(session, metadata, parser, accessControl, queryExplainer, parameters, warningCollector);
  Analysis analysis = analyzer.analyze(statement, true);
  // get all parameters in query
  List<Parameter> parameters = getParameters(statement);
  // return the positions and types of all parameters
  Row[] rows = parameters.stream().map(parameter -> createDescribeInputRow(parameter, analysis)).toArray(Row[]::new);
  Optional<String> limit = Optional.empty();
  if (rows.length == 0) {
    rows = new Row[] {row(new NullLiteral(), new NullLiteral())};
    limit = Optional.of("0");
  }
  return simpleQuery(
      selectList(identifier("Position"), identifier("Type")),
      aliased(
          values(rows),
          "Parameter Input",
          ImmutableList.of("Position", "Type")),
      Optional.empty(),
      Optional.empty(),
      Optional.empty(),
      Optional.of(ordering(ascending("Position"))),
      limit);
}

@Override
protected Node visitDescribeInput(DescribeInput node, Void context)
    throws SemanticException
{
  String sqlString = session.getPreparedStatement(node.getName().getValue());
  Statement statement = parser.createStatement(sqlString, createParsingOptions(session));
  // create  analysis for the query we are describing.
  Analyzer analyzer = new Analyzer(session, metadata, parser, accessControl, queryExplainer, parameters, warningCollector);
  Analysis analysis = analyzer.analyze(statement, true);
  // get all parameters in query
  List<Parameter> parameters = getParameters(statement);
  // return the positions and types of all parameters
  Row[] rows = parameters.stream().map(parameter -> createDescribeInputRow(parameter, analysis)).toArray(Row[]::new);
  Optional<String> limit = Optional.empty();
  if (rows.length == 0) {
    rows = new Row[] {row(new NullLiteral(), new NullLiteral())};
    limit = Optional.of("0");
  }
  return simpleQuery(
      selectList(identifier("Position"), identifier("Type")),
      aliased(
          values(rows),
          "Parameter Input",
          ImmutableList.of("Position", "Type")),
      Optional.empty(),
      Optional.empty(),
      Optional.empty(),
      Optional.of(ordering(ascending("Position"))),
      limit);
}

    identifier("Aliased")),
aliased(
    values(rows),
    "Statement Output",
    ImmutableList.of("Column Name", "Catalog", "Schema", "Table", "Type", "Type Size", "Aliased")),

    identifier("Aliased")),
aliased(
    values(rows),
    "Statement Output",
    ImmutableList.of("Column Name", "Catalog", "Schema", "Table", "Type", "Type Size", "Aliased")),

@Test
public void testLimitAll()
{
  Query valuesQuery = query(values(
      row(new LongLiteral("1"), new StringLiteral("1")),
      row(new LongLiteral("2"), new StringLiteral("2"))));
  assertStatement("SELECT * FROM (VALUES (1, '1'), (2, '2')) LIMIT ALL",
      simpleQuery(selectList(new AllColumns()),
          subquery(valuesQuery),
          Optional.empty(),
          Optional.empty(),
          Optional.empty(),
          Optional.empty(),
          Optional.of("ALL")));
}

@Test
public void testValues()
{
  Query valuesQuery = query(values(
      row(new StringLiteral("a"), new LongLiteral("1"), new DoubleLiteral("2.2")),
      row(new StringLiteral("b"), new LongLiteral("2"), new DoubleLiteral("3.3"))));
  assertStatement("VALUES ('a', 1, 2.2e0), ('b', 2, 3.3e0)", valuesQuery);
  assertStatement("SELECT * FROM (VALUES ('a', 1, 2.2e0), ('b', 2, 3.3e0))",
      simpleQuery(
          selectList(new AllColumns()),
          subquery(valuesQuery)));
}

@Test
public void testQuantifiedComparison()
{
  assertExpression("col1 < ANY (SELECT col2 FROM table1)",
      new QuantifiedComparisonExpression(
          LESS_THAN,
          QuantifiedComparisonExpression.Quantifier.ANY,
          identifier("col1"),
          new SubqueryExpression(simpleQuery(selectList(new SingleColumn(identifier("col2"))), table(QualifiedName.of("table1"))))));
  assertExpression("col1 = ALL (VALUES ROW(1), ROW(2))",
      new QuantifiedComparisonExpression(
          ComparisonExpression.Operator.EQUAL,
          QuantifiedComparisonExpression.Quantifier.ALL,
          identifier("col1"),
          new SubqueryExpression(query(values(row(new LongLiteral("1")), row(new LongLiteral("2")))))));
  assertExpression("col1 >= SOME (SELECT 10)",
      new QuantifiedComparisonExpression(
          ComparisonExpression.Operator.GREATER_THAN_OR_EQUAL,
          QuantifiedComparisonExpression.Quantifier.SOME,
          identifier("col1"),
          new SubqueryExpression(simpleQuery(selectList(new LongLiteral("10"))))));
}