我知道了。bindparams的实际值保存在一个称为的对象中，该对象sqlCompiler通常是特定于方言的。这里（链接到GitHub）是在sqlCompiler查询编译过程中将bindparams存储在实例中的位置
因此，我的代码段的最终版本如下所示：
class values(FromClause):
named_with_column = True
def __init__(self, columns, *args, **kw):
self._column_args = columns
self.list = args
self.alias_name = self.name = kw.pop('alias_name', None)
def _populate_column_collection(self):
# self._columns.update((col.name, col) for col in self._column_args)
for c in self._column_args:
c._make_proxy(self, c.name)
@compiles(values)
def compile_values(clause, compiler, asfrom=False, **kw):
def decide(value, column):
add_type_hint = False
if @R_404_937@(value, array) and not value.clauses: # for empty array literals
add_type_hint = True
if @R_404_937@(value, ClauseElement):
intermediate = compiler.process(value)
if add_type_hint:
intermediate += '::' + str(column.type)
return intermediate
elif value is None:
return compiler.render_literal_value(
value,
NULLTYPE
) + '::' + str(column.type)
else:
return compiler.process(
bindparam(
None,
value=compiler.render_literal_value(
value,
column.type
).strip("'")
)
) + '::' + str(column.type)
columns = clause.columns
v = "VALUES %s" % ", ".join(
"(%s)" % ", ".join(
decide(elem, column)
for elem, column in zip(tup, columns))
for tup in clause.list
)
if asfrom:
if clause.alias_name:
v = "(%s) AS %s (%s)" % (v, clause.alias_name, (", ".join(c.name for c in clause.columns)))
else:
v = "(%s)" % v
return v
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