6.111. slon_quote_input(text)

Function Properties

Language: PLPGSQL

Return Type: text

quote all words that aren't quoted yet

  declare
     p_tab_fqname alias for $1;
     v_nsp_name text;
     v_tab_name text;
	 v_i integer;
	 v_l integer;
     v_pq2 integer;
begin
	v_l := length(p_tab_fqname);

	-- Let us search for the dot
	if p_tab_fqname like '"%' then
		-- if the first part of the ident starts with a double quote, search
		-- for the closing double quote, skipping over double double quotes.
		v_i := 2;
		while v_i <= v_l loop
			if substr(p_tab_fqname, v_i, 1) != '"' then
				v_i := v_i + 1;
			else
				v_i := v_i + 1;
				if substr(p_tab_fqname, v_i, 1) != '"' then
					exit;
				end if;
				v_i := v_i + 1;
			end if;
		end loop;
	else
		-- first part of ident is not quoted, search for the dot directly
		v_i := 1;
		while v_i <= v_l loop
			if substr(p_tab_fqname, v_i, 1) = '.' then
				exit;
			end if;
			v_i := v_i + 1;
		end loop;
	end if;

	-- v_i now points at the dot or behind the string.

	if substr(p_tab_fqname, v_i, 1) = '.' then
		-- There is a dot now, so split the ident into its namespace
		-- and objname parts and make sure each is quoted
		v_nsp_name := substr(p_tab_fqname, 1, v_i - 1);
		v_tab_name := substr(p_tab_fqname, v_i + 1);
		if v_nsp_name not like '"%' then
			v_nsp_name := '"' || replace(v_nsp_name, '"', '""') ||
						  '"';
		end if;
		if v_tab_name not like '"%' then
			v_tab_name := '"' || replace(v_tab_name, '"', '""') ||
						  '"';
		end if;

		return v_nsp_name || '.' || v_tab_name;
	else
		-- No dot ... must be just an ident without schema
		if p_tab_fqname like '"%' then
			return p_tab_fqname;
		else
			return '"' || replace(p_tab_fqname, '"', '""') || '"';
		end if;
	end if;

end;