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Merged
merged 1 commit into from
Dec 1, 2024
Merged

Support for more charsets #46

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53 changes: 50 additions & 3 deletions mysql_ch_replicator/converter.py
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,51 @@
from .table_structure import TableStructure, TableField


CHARSET_MYSQL_TO_PYTHON = {
'armscii8': None, # ARMSCII-8 is not directly supported in Python
'ascii': 'ascii',
'big5': 'big5',
'binary': 'latin1', # Treat binary data as Latin-1 in Python
'cp1250': 'cp1250',
'cp1251': 'cp1251',
'cp1256': 'cp1256',
'cp1257': 'cp1257',
'cp850': 'cp850',
'cp852': 'cp852',
'cp866': 'cp866',
'cp932': 'cp932',
'dec8': 'latin1', # DEC8 is similar to Latin-1
'eucjpms': 'euc_jp', # Map to EUC-JP
'euckr': 'euc_kr',
'gb18030': 'gb18030',
'gb2312': 'gb2312',
'gbk': 'gbk',
'geostd8': None, # GEOSTD8 is not directly supported in Python
'greek': 'iso8859_7',
'hebrew': 'iso8859_8',
'hp8': None, # HP8 is not directly supported in Python
'keybcs2': None, # KEYBCS2 is not directly supported in Python
'koi8r': 'koi8_r',
'koi8u': 'koi8_u',
'latin1': 'cp1252', # MySQL's latin1 corresponds to Windows-1252
'latin2': 'iso8859_2',
'latin5': 'iso8859_9',
'latin7': 'iso8859_13',
'macce': 'mac_latin2',
'macroman': 'mac_roman',
'sjis': 'shift_jis',
'swe7': None, # SWE7 is not directly supported in Python
'tis620': 'tis_620',
'ucs2': 'utf_16', # UCS-2 can be mapped to UTF-16
'ujis': 'euc_jp',
'utf16': 'utf_16',
'utf16le': 'utf_16_le',
'utf32': 'utf_32',
'utf8mb3': 'utf_8', # Both utf8mb3 and utf8mb4 can be mapped to UTF-8
'utf8mb4': 'utf_8',
}


def convert_bytes(obj):
if isinstance(obj, dict):
new_obj = {}
Expand Down Expand Up @@ -272,7 +317,7 @@ def convert_record(
'text' in mysql_field_type or 'char' in mysql_field_type
):
if isinstance(clickhouse_field_value, bytes):
charset = mysql_structure.charset or 'utf-8'
charset = mysql_structure.charset_python
clickhouse_field_value = clickhouse_field_value.decode(charset)

if 'point' in mysql_field_type:
Expand Down Expand Up @@ -541,8 +586,10 @@ def parse_mysql_table_structure(self, create_statement, required_table_name=None
prev_prev_token = prev_token
prev_token = curr_token

if structure.charset.startswith('utf8'):
structure.charset = 'utf-8'
structure.charset_python = 'utf-8'

if structure.charset:
structure.charset_python = CHARSET_MYSQL_TO_PYTHON[structure.charset]

for line in inner_tokens:
if line.lower().startswith('unique key'):
Expand Down
1 change: 1 addition & 0 deletions mysql_ch_replicator/table_structure.py
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Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,7 @@ class TableStructure:
primary_key_ids: int = 0
table_name: str = ''
charset: str = ''
charset_python: str = ''

def preprocess(self):
field_names = [f.name for f in self.fields]
Expand Down