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Fix bogus test for hypothetical indexes in get_actual_variable_range().

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That function was supposing that indexoid == 0 for a hypothetical index,
but that is not likely to be true in any non-toy implementation of an index
adviser, since assigning a fake OID is the only way to know at EXPLAIN time
which hypothetical index got selected.  Fix by adding a flag to
IndexOptInfo to mark hypothetical indexes.  Back-patch to 9.0 where
get_actual_variable_range() was added.

Gurjeet Singh
This commit is contained in:
Tom Lane
2011-02-16 19:24:45 -05:00
parent 6595dd04d1
commit a2095f7fb5
4 changed files with 7 additions and 3 deletions
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2
src/backend/nodes/outfuncs.c
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@ -1700,10 +1700,12 @@ _outIndexOptInfo(StringInfo str, IndexOptInfo *node)
WRITE_UINT_FIELD(pages);
WRITE_FLOAT_FIELD(tuples, "%.0f");
WRITE_INT_FIELD(ncolumns);
WRITE_OID_FIELD(relam);
WRITE_NODE_FIELD(indexprs);
WRITE_NODE_FIELD(indpred);
WRITE_BOOL_FIELD(predOK);
WRITE_BOOL_FIELD(unique);
WRITE_BOOL_FIELD(hypothetical);
}
static void