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Add SQL Standard WITH ORDINALITY support for UNNEST (and any other SRF)

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Author: Andrew Gierth, David Fetter
Reviewers: Dean Rasheed, Jeevan Chalke, Stephen Frost
This commit is contained in:
Greg Stark
2013-07-29 16:38:01 +01:00
parent 55cbfa5366
commit c62736cc37
22 changed files with 1486 additions and 323 deletions
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34
src/backend/access/common/tupdesc.c
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@@ -157,6 +157,40 @@ CreateTupleDescCopy(TupleDesc tupdesc)
return desc;
}
/*
* CreateTupleDescCopyExtend
* This function creates a new TupleDesc by copying from an existing
* TupleDesc, but adding space for more columns. The new tupdesc is
* not regarded as the same record type as the old one (and therefore
* does not inherit its typeid/typmod, which instead are left as an
* anonymous record type).
*
* The additional column slots are not initialized in any way;
* callers must do their own TupleDescInitEntry on each.
*
* !!! Constraints and defaults are not copied !!!
*/
TupleDesc
CreateTupleDescCopyExtend(TupleDesc tupdesc, int moreatts)
{
TupleDesc desc;
int i;
int src_natts = tupdesc->natts;
Assert(moreatts >= 0);
desc = CreateTemplateTupleDesc(src_natts + moreatts, tupdesc->tdhasoid);
for (i = 0; i < src_natts; i++)
{
memcpy(desc->attrs[i], tupdesc->attrs[i], ATTRIBUTE_FIXED_PART_SIZE);
desc->attrs[i]->attnotnull = false;
desc->attrs[i]->atthasdef = false;
}
return desc;
}
/*
* CreateTupleDescCopyConstr
* This function creates a new TupleDesc by copying from an existing