Events-csv Concepts: Difference between revisions
| Line 9: | Line 9: | ||
a, , b | a, , b | ||
generates a data line with two values: "a" and "b", separated by a "missing value". | generates a data line with two values: <tt>"a"</tt> and <tt>"b"</tt>, separated by a "missing value". | ||
The quoted empty strings found between commas are interpreted as empty strings. For example: | The quoted empty strings found between commas are interpreted as empty strings. For example: | ||
| Line 15: | Line 15: | ||
a," ", b | a," ", b | ||
generates a data line with three values: "a", " " and "b". | generates a data line with three values: <tt>"a"</tt>, <tt>" "</tt> and <tt>"b"</tt>. | ||
=CSV Format= | =CSV Format= | ||
Revision as of 18:56, 28 August 2017
Internal
Tokenization
The empty strings found between commas are interpreted as "missing value". For example:
a, , b
generates a data line with two values: "a" and "b", separated by a "missing value".
The quoted empty strings found between commas are interpreted as empty strings. For example:
a," ", b
generates a data line with three values: "a", " " and "b".
CSV Format
Headers can be specified in-line. A header is prefixed with '#' and specifies the fields:
# timestamp(MM/dd/yy HH:mm:ss), collection-type(string), heap-occupancy(long)
Multiple headers are supported in the CSV line stream, and the parser adjust upon receiving a header, by parsing the data lines according to the latest header seen on the stream.
Comment lines are not allowed.
CSV Field
CSV Field Specification
"timestamp", "timestamp(yy/MM/dd HH:mm:ss)", "timestamp(time:yy/MM/dd HH:mm:ss)"
"something", "something(string)"
"something(int)"
"something(long)"
"something(float)"
"something(double)"
"something(time)"