This is definitely a change from PgAdmin 1.6. 1.6 had the blank pull down. In fact 1.6 offered three options: blank, pg_default, pg_global. 1.8 only offers one: pg_default
CREATE INDEX otformularkopf_test ON otformularkopf (id_pkfk);
and allow Postgres to decide in which tablespace to put that index. But the "tablespace" dropdown is not blankable.
So my suggestion: make tablespace default blank in the wizards.
Harald
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