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from sqlalchemy import Column
from sqlalchemy.sql.compiler import DDLCompiler
from clickhouse_connect.cc_sqlalchemy.sql import format_table
from clickhouse_connect.driver.binding import quote_identifier
class ChDDLCompiler(DDLCompiler):
def visit_create_schema(self, create, **_):
return f'CREATE DATABASE {quote_identifier(create.element)}'
def visit_drop_schema(self, drop, **_):
return f'DROP DATABASE {quote_identifier(drop.element)}'
def visit_create_table(self, create, **_):
table = create.element
text = f'CREATE TABLE {format_table(table)} ('
text += ', '.join([self.get_column_specification(c.element) for c in create.columns])
return text + ') ' + table.engine.compile()
def get_column_specification(self, column: Column, **_):
text = f'{quote_identifier(column.name)} {column.type.compile()}'
return text
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