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Fix missing outfuncs.c support for IncrementalSortPath.

Browse Source 
For debugging purposes, Path nodes are supposed to have outfuncs
support, but this was overlooked in the original incremental sort patch.

While at it, clean up a couple other minor oversights, as well as
bizarre choice of return type for create_incremental_sort_path().
(All the existing callers just cast it to "Path *" immediately, so
they don't care, but some future caller might care.)

outfuncs.c fix by Zhijie Hou, the rest by me

Discussion: https://postgr.es/m/324c4d81d8134117972a5b1f6cdf9560@G08CNEXMBPEKD05.g08.fujitsu.local
This commit is contained in:
Tom Lane
2020-11-30 16:32:56 -05:00
parent 58ebe967f8
commit 8286223f3d
5 changed files with 34 additions and 11 deletions
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23
src/backend/nodes/outfuncs.c
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@ -1954,14 +1954,30 @@ _outProjectSetPath(StringInfo str, const ProjectSetPath *node)
WRITE_NODE_FIELD(subpath);
}
static void
_outSortPathInfo(StringInfo str, const SortPath *node)
{
_outPathInfo(str, (const Path *) node);
WRITE_NODE_FIELD(subpath);
}
static void
_outSortPath(StringInfo str, const SortPath *node)
{
WRITE_NODE_TYPE("SORTPATH");
_outPathInfo(str, (const Path *) node);
_outSortPathInfo(str, node);
}
WRITE_NODE_FIELD(subpath);
static void
_outIncrementalSortPath(StringInfo str, const IncrementalSortPath *node)
{
WRITE_NODE_TYPE("INCREMENTALSORTPATH");
_outSortPathInfo(str, (const SortPath *) node);
WRITE_INT_FIELD(nPresortedCols);
}
static void
@ -4055,6 +4071,9 @@ outNode(StringInfo str, const void *obj)
case T_SortPath:
_outSortPath(str, obj);
break;
case T_IncrementalSortPath:
_outIncrementalSortPath(str, obj);
break;
case T_GroupPath:
_outGroupPath(str, obj);
break;