{
  "ALLNULL": {
    "acceptable_types": [
      "TEXT",
      "VARCHAR"
    ],
    "note": "entirely null numeric; loader must pick a default type, typically TEXT",
    "nullable": true
  },
  "ALLNULLC": {
    "acceptable_types": [
      "TEXT",
      "VARCHAR"
    ],
    "note": "entirely null character",
    "nullable": true
  },
  "BIGINT": {
    "note": "values beyond int32 range",
    "nullable": true,
    "postgres_type": "BIGINT"
  },
  "BOOLCOL": {
    "acceptable_types": [
      "BOOLEAN",
      "SMALLINT",
      "INTEGER"
    ],
    "note": "{0,1,NaN} is genuinely ambiguous; loader's choice is a design decision",
    "nullable": true
  },
  "CONST": {
    "acceptable_types": [
      "TEXT",
      "VARCHAR"
    ],
    "nullable": false
  },
  "DATEASTR": {
    "note": "stored as char in SAS; loader should coerce ISO-date strings",
    "nullable": true,
    "postgres_type": "DATE"
  },
  "DATECOL": {
    "note": "positive control",
    "nullable": false,
    "postgres_type": "DATE"
  },
  "DTCOL": {
    "acceptable_types": [
      "TIMESTAMP",
      "TIMESTAMP WITHOUT TIME ZONE"
    ],
    "nullable": true
  },
  "FLOATCOL": {
    "acceptable_types": [
      "DOUBLE PRECISION",
      "NUMERIC"
    ],
    "nullable": true
  },
  "ID": {
    "nullable": false,
    "postgres_type": "INTEGER"
  },
  "INTCOL": {
    "note": "positive control",
    "nullable": false,
    "postgres_type": "INTEGER"
  },
  "LONGSTR": {
    "acceptable_types": [
      "TEXT",
      "VARCHAR"
    ],
    "nullable": true
  },
  "MIXED": {
    "acceptable_types": [
      "TEXT",
      "VARCHAR"
    ],
    "note": "heterogeneous content; loader should fall back to text",
    "nullable": true
  },
  "NUMASSTR": {
    "acceptable_types": [
      "NUMERIC",
      "DOUBLE PRECISION"
    ],
    "note": "stored as char in SAS; loader should coerce numeric-looking strings",
    "nullable": true
  },
  "STRCOL": {
    "acceptable_types": [
      "TEXT",
      "VARCHAR"
    ],
    "note": "positive control",
    "nullable": false
  },
  "TIMECOL": {
    "nullable": true,
    "postgres_type": "TIME"
  }
}