Github user davies commented on a diff in the pull request: https://github.com/apache/spark/pull/11444#discussion_r54979708 --- Diff: python/pyspark/sql/types.py --- @@ -681,6 +681,129 @@ def __eq__(self, other): for v in [ArrayType, MapType, StructType]) +_FIXED_DECIMAL = re.compile("decimal\\(\\s*(\\d+)\\s*,\\s*(\\d+)\\s*\\)") + + +_BRACKETS = {'(': ')', '[': ']', '{': '}'} + + +def _parse_basic_datatype_string(s): + if s in _all_atomic_types.keys(): + return _all_atomic_types[s]() + elif s == "int": + return IntegerType() + elif _FIXED_DECIMAL.match(s): + m = _FIXED_DECIMAL.match(s) + return DecimalType(int(m.group(1)), int(m.group(2))) + else: + raise ValueError("Could not parse datatype: %s" % s) + + +def _ignore_brackets_split(s, separator): + """ + Splits the given string by given separator, but ignore separators inside brackets pairs, e.g. + given "a,b" and separator ",", it will return ["a", "b"], but given "a<b,c>, d", it will return + ["a<b,c>", "d"]. + """ + parts = [] + buf = "" + level = 0 + for c in s: + if c in _BRACKETS.keys(): + level += 1 + buf += c + elif c in _BRACKETS.values(): + if level == 0: + raise ValueError("Brackets are not correctly paired: %s" % s) + level -= 1 + buf += c + elif c == separator and level > 0: + buf += c + elif c == separator: + parts.append(buf) + buf = "" + else: + buf += c + + if len(buf) == 0: + raise ValueError("The %s cannot be the last char: %s" % (separator, s)) + parts.append(buf) + return parts + + +def _parse_struct_type_string(s): --- End diff -- Does this support StructType?
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