my-first-blog/myvenv/Lib/site-packages/django/db/backends/mysql/compiler.py

from django.db.models.sql import compiler


class SQLCompiler(compiler.SQLCompiler):
    def as_subquery_condition(self, alias, columns, compiler):
        qn = compiler.quote_name_unless_alias
        qn2 = self.connection.ops.quote_name
        sql, params = self.as_sql()
        return '(%s) IN (%s)' % (', '.join('%s.%s' % (qn(alias), qn2(column)) for column in columns), sql), params


class SQLInsertCompiler(compiler.SQLInsertCompiler, SQLCompiler):
    pass


class SQLDeleteCompiler(compiler.SQLDeleteCompiler, SQLCompiler):
    pass


class SQLUpdateCompiler(compiler.SQLUpdateCompiler, SQLCompiler):
    pass


class SQLAggregateCompiler(compiler.SQLAggregateCompiler, SQLCompiler):
    pass