bug: A field referencing record in streams maps gets incorrectly mapped to a string type in the schema

[edgarrmondragon]

Singer SDK Version

0.30.0

Is this a regression?

• Yes

Python Version

NA

Bug scope

Mapping (stream maps, flattening, etc.)

Operating System

NA

Description

Consider the countries sample in the SDK repo and the following stream maps configuration:

{
    "stream_maps": {
        "countries": {
            "_data": "record",
            "__key_properties__": [],
            "__else__": null
        }
    },
    "stream_map_config": {}
}

Then run

poetry run python samples/sample_tap_countries --config stream_maps.json > mapped_countries.singer.jsonl

Note that in the resulting SCHEMA message, the _data field is of type string. This is because record is not recognized as a special name and the type inference logic falls back to the default string type:

sdk/singer_sdk/mapper.py

Lines 370 to 384 in 759c77b

	default = default or StringType()
	if expr.startswith("float("):
	return NumberType()
	if expr.startswith("int("):
	return IntegerType()
	if expr.startswith("str("):
	return StringType()
	if expr[0] == "'" and expr[-1] == "'":
	return StringType()
	return default

This should be relatively easy to fix by adding a new branch

if expr == "record":
    return ObjectType()

Code

No response