Description

sprintf returns a new string formed by "printing" a variable number of arguments arg_1 - arg_x according to the format string format, that is, exactly the same way as with the sprintf function of C language. However the sprintf function enforces some additional limitations over the sprintf C function. It does not allow for single value output to take more than 2000 characters. It does support the following additional format characters:

diouxXeEfgcs - as in the C language printf

S - as 's' but escapes the single quotes by doubling them (as per SQL/92). This is suitable for constructing dynamic SQL statements with string literals inline.

    sprintf ('insert into testit (data) values ('%S')', 'Test ''Real'' data')
	-> insert into testit (data) values ('Test ''Real'' data')

I - as 's' but escapes the string value to form a valid identifier name (will double the double quotes). This is suitable for constructing dynamic SQL statements with identifiers inline.

    sprintf ('select * from "%I"', 'Big "Table" Name')
	-> select * from "Big ""Table"" Name"

U - as 's' but escapes the string value as an HTTP URL (same as http_url() function). Useful for making dynamic VSP content

    sprintf ('<a href="%U">', 'day & night')
	-> <a href="day+%26+night">

R - use to replace leading spaces: the modifiers are one of + - # 0 and space.

    sprintf ('%-R', ' 123')
    -123
    sprintf ('%-R', '  123')
    --123

V - as 's' but escapes the string value as an HTTP Value (same as http_value). Useful for making dynamic VSP content

    sprintf ('<INPUT name="test" value="%V">', 'day & night')
	-> <INPUT name="test" value="day &amp; night">

Note that the sprintf format length and precision modifiers do not apply to the extension format characters

sprintf('Int=%d/%o/%x, String=%s, Character=%c',
    42798,42798,42798,'la cadena',65)
 -> 'Int=42798/123456/a72e, String=la cadena, Character=A'

In addition, %{varname}U syntax extension is supported, mostly for uing connection variables in RDF IRI classes . That syntax is to print the value of client connection variable varname using print format %U . Other format characters are not supported for that feature in current version of Virtuoso but might be supported in the future.