Apply operator fails on semantic execution

[mla2001]

Initial Checks

• I have searched existing issues for duplicates
• I have read the documentation

Summary

Apply operator semantic execution fails because the list of operations is not handled in the validate method.

Reproducible Example

script = "DS_r := inner_join (DS_1 as d1, DS_1 as d2 apply d1 + d2);"

    data_structures = {
        "datasets": [
            {
                "name": "DS_1",
                "DataStructure": [
                    {"name": "Id_1", "type": "Integer", "role": "Identifier", "nullable": False},
                    {"name": "Me_1", "type": "Number", "role": "Measure", "nullable": True},
                ],
            }
        ]
    }

    semantic_analysis(script=script, data_structures=data_structures)

vtlengine version

1.6.0

Python version

Any

OS

Any