On 03/01/2018 03:57, Lionel Elie Mamane wrote: > Hi, > > Where is ':' a valid character in Firebird SQL? In particular, is it > ever valid outside of "-delimited identifiers and '-delimited strings? > > Context: In the LibreOffice integration of Firebird, we would like to > allow users to use named parameters, that is things like ':foo' instead > of '?' (without the single quotes). E.g. > > SELECT foo, bar FROM qux WHERE item_year = :year > > instead of > > SELECT foo, bar FROM qux WHERE item_year = ? > > Which means we have to go through the SQL statement passed by the user > and replace such ':foo' parameters by '?' before giving the SQL > statement to Firebird. > > I'd like to avoid completely parsing the SQL statement for that, > mainly so that the SQL statement is not modified by the LibreOffice > SQL parser (and in particular quoting keywords it doesn't know as > identifiers). So I'm hoping to simply go through the string, keep > track of single and double quotes, and replace any word (outside of > quotes) that starts with ':' by '?'. This wouldn't work for > e.g. PostgreSQL because of its cast syntax (namely 'data::type'), but > is it OK for Firebird? > > :foo is a valid syntax in Firebird inside PSQL code, i.e., stored procedures, triggers, execute block.
Example: execute block returns (foo integer) as begin select 1 from rdb$database into :foo; suspend; end It's also valid for input parameters: execute block (bar integer = ?) returns (foo integer) as begin select 1 from rdb$database where 1 = :bar into :foo; suspend; end Adriano ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot Firebird-Devel mailing list, web interface at https://lists.sourceforge.net/lists/listinfo/firebird-devel
