Submitted by: @asfernandes

Is related to QA643

Syntax:

<alternate string literal> ::=
{ q | Q } <quote> <alternate start char> [ { <char> }... ] <alternate end char> <quote>

Syntax rules:
When <alternate start char> is '(', '{', '[' or '<', <alternate end char> is respectively
')', '}', ']' and '>'. In other cases, <alternate end char> is equal to <alternate start char>.

Notes:
Inside the string, i.e., <char> items, single (not escaped) quotes could be used.
Each quote will be part of the result string.

Examples:
select q'{abc{def}ghi}' from rdb$database; -- result: abc{def}ghi
select q'!That's a string!' from rdb$database; -- result: That's a string

Commits: 0145996 ed0e0da