Method visit_bindparam

lib/sqlalchemy/sql/compiler.py:3871–4045

(
        self,
        bindparam,
        within_columns_clause=False,
        literal_binds=False,
        skip_bind_expression=False,
        literal_execute=False,
        render_postcompile=False,
        is_upsert_set=False,
        **kwargs,
    )

        return f"__BINDMARKER_~~{element.column.key}~~"

    def visit_bindparam(
        self,
        bindparam,
        within_columns_clause=False,
        literal_binds=False,
        skip_bind_expression=False,
        literal_execute=False,
        render_postcompile=False,
        is_upsert_set=False,
        **kwargs,
    ):
        # Detect parametrized bindparams in upsert SET clause for issue #13130
        if (
            is_upsert_set
            and bindparam.value is None
            and bindparam.callable is None
            and self._insertmanyvalues is not None
        ):
            self._insertmanyvalues = self._insertmanyvalues._replace(
                has_upsert_bound_parameters=True
            )

        if not skip_bind_expression:
            impl = bindparam.type.dialect_impl(self.dialect)
            if impl._has_bind_expression:
                bind_expression = impl.bind_expression(bindparam)
                wrapped = self.process(
                    bind_expression,
                    skip_bind_expression=True,
                    within_columns_clause=within_columns_clause,
                    literal_binds=literal_binds and not bindparam.expanding,
                    literal_execute=literal_execute,
                    render_postcompile=render_postcompile,
                    **kwargs,
                )
                if bindparam.expanding:
                    # for postcompile w/ expanding, move the "wrapped" part
                    # of this into the inside

                    m = re.match(
                        r"^(.*)\(__\[POSTCOMPILE_(\S+?)\]\)(.*)$", wrapped
                    )
                    assert m, "unexpected format for expanding parameter"
                    wrapped = "(__[POSTCOMPILE_%s~~%s~~REPL~~%s~~])" % (
                        m.group(2),
                        m.group(1),
                        m.group(3),
                    )

                    if literal_binds:
                        ret = self.render_literal_bindparam(
                            bindparam,
                            within_columns_clause=True,
                            bind_expression_template=wrapped,
                            **kwargs,
                        )
                        return f"({ret})"