LOAD CSV clause enables you to load and use data from a CSV file of your
choosing in a row-based manner within a query. We support the Excel CSV dialect,
as it's the most commonly used one.
The syntax of the clause is:
LOAD CSV FROM <csv-file-path> ( WITH | NO ) HEADER [IGNORE BAD] [DELIMITER <delimiter-string>] [QUOTE <quote-string>] AS <variable-name>
<csv-file-path>is a string holding the path to the CSV file. There are no restrictions on where in your filesystem the file can be located, as long as the path is valid (i.e., the file exists).
( WITH | NO ) HEADERflag specifies whether the CSV file is to be parsed as though it has or hasn't got a header.
IGNORE BADflag specifies whether rows containing errors should be ignored or not. If it's set, the parser attempts to return the first valid row from the CSV file. If it isn't set, an exception will be thrown on the first invalid row encountered.
DELIMITER <delimiter-string>option enables you to specify the CSV delimiter character. If it isn't set, the default delimiter character
QUOTE <quote-string>option enables you to specify the CSV quote character. If it isn't set, the default quote character
<variable-name>is a symbolic name representing the variable to which the contents of the parsed row will be bound to, enabling access to the row contents later in the query.
The clause reads row by row from a CSV file and binds the contents of the parsed row to the variable you specified.
It's important to note that the parser parses the values as strings.
It's up to the user to convert the parsed row values to the appropriate type.
This can be done using the built-in conversion functions such as
ToBoolean etc. Consult the documentation on the
available conversion functions.