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Atul Dattatray Bhujbal

Atul Dattatray Bhujbal

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titleA parquet file is a type of column-oriented file format where the data in each column is stored independently. It contains a table-type format to store the data.
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  • Delimited

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titleA delimited file is a text file format where the data in each column is seperated by a delimiter such as comma, tab, pipe etc.
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Header Row: Allows to specify that the file's first row data must be considered a header row. Data available in the header row separated by delimiter are column names.

Delimiter: Delimiter is a character separator that separates the values stored in rows. Allows to define the predefined and custom delimiter for the data. Select the required delimiter from the dropdown.

  • Comma: Allows to select a Comma (,) delimiter for the data.

  • Tab: Allows to select a Tab ( ) delimiter for the data.

  • Custom: Allows to define the custom delimiter. For Example: Semicolon, Colon, Pipe, Forward Slash.

Info

Selection of Custom enables the Custom Delimiter.

Custom Delimiter: Allows to define a new custom delimiter for the data.

Selection of Custom from the Delimiter dropdown is mandatory to define the custom delimiter.

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Escape-Character
Escape-Character
Escape Character: An Escape character and a Text Qualifier create a sequence recognized and ignored during parsing. Its purpose is to allow the use of escape sequences in the data that would otherwise be seen as delimiter occurrences.

Info

The character preceded by a backslash (\) is known as an escape character.

The use of escape character minimises the need of switching quotation marks for enclosing the strings, which contains special punctuation marks.
So you can use any quotation marks to enclose your string and escape the collision that comes in the middle by using escape character.

It also avoids the delimiter collision.

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Text-Qualifier
Text-Qualifier
Text Qualifier: Text qualifier is used in the event that delimiters are contained within the row cell. If the cell contains a delimiter and a text qualifier is not used, then the data that occurs after the delimiter will spill into the next column.

Info

The Text Qualifiers are single (' ') or double (“ “) quotation marks around data elements to identify the element as text- or character-based data.

A text qualifier is a character used at the beginning and end of a field value.

Note

If the data has used single or double quotation marks to enclose the delimiter character or any special character, same must be defined in the text qualifier.

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titlePlain text file is written in the syntax of JSON
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Supported Structure

  1. Characteristics of supported JSON is one record per row.

Code Block
{"first_name": "Bradley", "priority": 1683, "subscribe": true, "income": 955289.05, "address": {"City": "Nicolestad", "State": "Massachusetts"}, "countries_visited": ["Turks and Caicos Islands", "Spain", "New Caledonia"], "date_of_birth": "1988-02-19 00:00:00", "null_key": null}
{"first_name": "Jennifer", "priority": 2756, "subscribe": true, "income": 15248.17, "address": {"City": "Burnsborough", "State": "Idaho"}, "countries_visited": ["Mauritania", "Turkey", "Guinea"], "date_of_birth": "1994-08-31 00:00:00", "null_key": null}
{"first_name": "Tyler", "priority": 2628, "subscribe": false, "income": 248173.49, "address": {"City": "Ericahaven", "State": "California"}, "countries_visited": ["Sudan", "Afghanistan", "Chad"], "date_of_birth": "1978-06-30 00:00:00", "null_key": null}
{"first_name": "Lisa", "priority": 1518, "subscribe": false, "income": 338300.85, "address": {"City": "Tracyton", "State": "Oklahoma"}, "countries_visited": ["Honduras", "Samoa", "Congo"], "date_of_birth": "1991-08-06 00:00:00", "null_key": null}
{"first_name": "William", "priority": 1714, "subscribe": false, "income": 950738.18, "address": {"City": "Lake Tina", "State": "Nevada"}, "countries_visited": ["Seychelles", "Vietnam", "Lebanon"], "date_of_birth": "1981-02-09 00:00:00", "null_key": null}

This is a widely used format for data ingestion.

Not Supported Structure

  1. JSON files with formatted records (that span over multiple rows).

    Code Block
    {
   "first_name":"Rachel",
   "priority":2619,
   "subscribe":false,
   "income":435324.12,
   "address":{
      "City":"Smithstad",
      "State":"Michigan"
   },
   "countries_visited":[
      "Belize",
      "Eritrea",
      "Egypt"
   ],
   "date_of_birth":"1976-06-19 00:00:00",
   "null_key":null
}

  2. JSON contains data in arrays.

    Code Block
    [{"id":1,"name":"John Doe","email":"john.doe@example.com"},{"id":2,"name":"Jane Doe","email":"jane.doe@example.com"},{"id":3,"name":"Mike Smith","email":"mike.smith@example.com"}]
[{"id":7,"name":"Peter Green","email":"peter.green@example.com"},{"id":8,"name":"Susan Black","email":"susan.black@example.com"},{"id":9,"name":"Michael White","email":"michael.white@example.com"},{"id":10,"name":"Jessica Green","email":"jessica.green@example.com"}]

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