mirror of
https://github.com/hanzo-ds/driver.git
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zeekay
eb74c996a6
Imports read `datastore_driver`, distribution `datastore-driver`, so nothing has to import another product's name to talk to Hanzo Datastore. Cut from upstream 0.2.9 — the version this stack already ran — rather than from upstream HEAD, so it is a PURE RENAME with no behaviour change. Forking from HEAD would have dragged versions along with the name (connect alone jumped 0.8.17 -> 1.6.0, a major), which is a different and much riskier change wearing a rename's clothes. X-ClickHouse-* headers are untouched: they are wire protocol the server sends and expects, and a different token shape from the module name.
74 lines
2.0 KiB
Python
74 lines
2.0 KiB
Python
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from .. import defines
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from .base import Column
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class String(Column):
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ch_type = 'String'
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py_types = (str, )
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null_value = ''
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default_encoding = defines.STRINGS_ENCODING
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def __init__(self, encoding=default_encoding, **kwargs):
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self.encoding = encoding
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super(String, self).__init__(**kwargs)
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def write_items(self, items, buf):
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buf.write_strings(items, encoding=self.encoding)
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def read_items(self, n_items, buf):
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return buf.read_strings(n_items, encoding=self.encoding)
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class ByteString(String):
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py_types = (bytes, )
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null_value = b''
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def write_items(self, items, buf):
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buf.write_strings(items)
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def read_items(self, n_items, buf):
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return buf.read_strings(n_items)
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class FixedString(String):
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ch_type = 'FixedString'
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def __init__(self, length, **kwargs):
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self.length = length
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super(FixedString, self).__init__(**kwargs)
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def read_items(self, n_items, buf):
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return buf.read_fixed_strings(
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n_items, self.length, encoding=self.encoding
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)
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def write_items(self, items, buf):
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buf.write_fixed_strings(items, self.length, encoding=self.encoding)
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class ByteFixedString(FixedString):
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py_types = (bytearray, bytes)
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null_value = b''
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def read_items(self, n_items, buf):
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return buf.read_fixed_strings(n_items, self.length)
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def write_items(self, items, buf):
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buf.write_fixed_strings(items, self.length)
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def create_string_column(spec, column_options):
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client_settings = column_options['context'].client_settings
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strings_as_bytes = client_settings['strings_as_bytes']
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encoding = client_settings.get('strings_encoding', String.default_encoding)
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if spec == 'String':
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cls = ByteString if strings_as_bytes else String
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return cls(encoding=encoding, **column_options)
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else:
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length = int(spec[12:-1])
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cls = ByteFixedString if strings_as_bytes else FixedString
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return cls(length, encoding=encoding, **column_options)
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