code: def extract_table_names(sql_query):
      # Regular expression pattern to match table names in FROM and JOIN clauses
      pattern = r"\bFROM\s+(\S+)\b|\bJOIN\s+(\S+)\b"
  
      # Find all matches in the SQL query
      matches = re.findall(pattern, sql_query, re.IGNORECASE)
  
      # Flatten the list of matches and filter out empty strings
      return [
          table_name
          for match in matches
          for table_name in match
          if table_name
      ]
  
label_desc: Use image node_id 1 for calling a global function with example usage: extract_table_names(sql_query) and returns: unknown