code: def test_int64_overflow_outer_merge(self):
      # #2690, combinatorial explosion
      df1 = DataFrame(
          np.random.default_rng(2).standard_normal((1000, 7)),
          columns=list("ABCDEF") + ["G1"],
      )
      df2 = DataFrame(
          np.random.default_rng(3).standard_normal((1000, 7)),
          columns=list("ABCDEF") + ["G2"],
      )
      result = merge(df1, df2, how="outer")
      assert len(result) == 2000
  
imports: from collections import defaultdict
  from datetime import datetime
  from itertools import product
  import numpy
  import pytest
  from pandas import NA, DataFrame, MultiIndex, Series, array, concat, merge
  import pandas._testing
  from pandas.core.algorithms import safe_sort
  import pandas.core.common
  from pandas.core.sorting import _decons_group_index, get_group_index, is_int64_overflow_possible, lexsort_indexer, nargsort
label_desc: Use image node_id 1 for calling the TestMerge obj's underlying member method code with example usage: obj.test_int64_overflow_outer_merge() without return types