Why does schema command generate a JSON schema with the all column names as the only property?

[PaulRBerg]

Given this TSV file:

date	category	sub_category	amount	from	to	description	url
2025-01-01	START	N/A	3023.46	-	-	Balance from 2024	N/A
2025-01-28	DEBIT	TRADE	-3023	Deployer 0xb1	Velodrome	Sell for USDC	https://optimistic.etherscan.io/tx/0x79e857395945f03a57454efcccdc5ca00430f5886018d71a9a137808a60fe7fc

qsv schema foo.tsv will generate this schema:

Toggle to see JSON schema

{
  "$schema": "https://json-schema.org/draft-07/schema",
  "title": "JSON Schema for foo.tsv",
  "description": "Inferred JSON Schema with `qsv schema foo.tsv`",
  "type": "object",
  "properties": {
    "date\tcategory\tsub_category\tamount\tfrom\tto\tdescription\turl": {
      "description": "date\tcategory\tsub_category\tamount\tfrom\tto\tdescription\turl column from foo.tsv",
      "minLength": 54,
      "maxLength": 168,
      "type": [
        "string"
      ],
      "enum": [
        "2025-01-01\tSTART\tN/A\t3023.46\t-\t-\tBalance from 2024\tN/A",
        "2025-01-28\tDEBIT\tTRADE\t-3023\tDeployer 0xb1\tVelodrome\tSell for USDC\thttps://optimistic.etherscan.io/tx/0x79e857395945f03a57454efcccdc5ca00430f5886018d71a9a137808a60fe7fc"
      ]
    }
  },
  "required": [
    "date\tcategory\tsub_category\tamount\tfrom\tto\tdescription\turl"
  ]
}

And that schema doesn't look right to me - why would the concatenated column names be a property? I was expecting one property for each column.

[PaulRBerg]

I tested with a CSV file and here it works:

key,value
john,42
mary,100

getting:

Toggle to see JSON schema

{
  "$schema": "https://json-schema.org/draft-07/schema",
  "title": "JSON Schema for foo.csv",
  "description": "Inferred JSON Schema with `qsv schema foo.csv`",
  "type": "object",
  "properties": {
    "key": {
      "description": "key column from foo.csv",
      "minLength": 4,
      "maxLength": 4,
      "type": [
        "string"
      ],
      "enum": [
        "john",
        "mary"
      ]
    },
    "value": {
      "description": "value column from foo.csv",
      "minimum": 42,
      "maximum": 100,
      "type": [
        "integer"
      ],
      "enum": [
        42,
        100
      ]
    }
  },
  "required": [
    "key",
    "value"
  ]
}

[PaulRBerg]

Looks like a bug: #2997

[jqnatividad]

Yep! And it's been fixed in #2998