rk.fields {nJira}

Process Fields Clause

Description

The function parses the fields clause and returns the modified string as per the specified mode. The fields clause supported format is represented by the following BNF:

<field.list> := <field.expr> ( DELIMIT.COMMA <field.expr> ) *
<field.expr> := ( FIELD.NAME | <aggr.func> LEFT.PAREN FIELD.NAME RIGHT.PAREN ) [ AS.ALIAS FIELD.NAME ]
<aggr.func> := FUNC.MIN | FUNC.MEDIAN | FUNC.AVG | FUNC.MAX | FUNC.COUNT | FUNC.SUM

Usage

rk.fields(fields, mode = "@")

Arguments

fields

clause following simplified sql syntax.

mode

specifies the parsing logic. The default value '@' returns the field list in perfmeter query format. The '+' value returns a field list used for grouping the dataframe with alias names. The '=' value returns a field list used for grouping the dataframe with original names. The '*' value returns the alias list used for renaming the columns. Any other value returns a field list used for selecting columns from a dataframe.

Value

The function returns the processed fields clause.