Method TestDecimalResultType

be/src/exprs/expr-test.cc:606–620

Verify that output of 'query' has the same precision and scale as 'expected_type'. 'query' is an expression, optionally followed by a from clause which is needed for testing aggregate expressions.

  // 'query' is an expression, optionally followed by a from clause which is needed
  // for testing aggregate expressions.
  void TestDecimalResultType(const string& query, const ColumnType& expected_type) {
    // For the case with from clause, we need to generate the "typeof query" by first
    // extracting the select list.
    size_t from_offset = query.find("from");
    string typeof_query;
    if (from_offset != string::npos) {
      int query_len = query.length();
      typeof_query = "typeof(" + query.substr(0, from_offset) + ")" +
          query.substr(from_offset, query_len - from_offset);
    } else {
      typeof_query = "typeof(" + query + ")";
    }
    const string typeof_result = GetValue(typeof_query, ColumnType(TYPE_STRING));
    EXPECT_EQ(expected_type.DebugString(), typeof_result) << typeof_query;
  }

  // Decimals don't work with TestValue.
  // TODO: figure out what operators need to be implemented to work with EXPECT_EQ