Log Message:
-----------
Use string component in index structure.
Modified Files:
--------------
pgsql/src/interfaces/ecpg/preproc:
preproc.y (r1.380 -> r1.381)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/preproc/preproc.y?r1=1.380&r2=1.381)