support create index on virtual generated column.

Applying: v9 enhance-index-support-for-virtual-generated-columns
Using index info to reconstruct a base tree...
M	src/backend/access/heap/heapam_handler.c
M	src/backend/bootstrap/bootstrap.c
M	src/backend/catalog/index.c
M	src/backend/catalog/toasting.c
M	src/backend/commands/analyze.c
M	src/backend/commands/indexcmds.c
M	src/backend/executor/execIndexing.c
M	src/backend/optimizer/path/costsize.c
M	src/backend/optimizer/plan/createplan.c
M	src/backend/optimizer/util/plancat.c
M	src/backend/utils/adt/selfuncs.c
M	src/backend/utils/cache/relcache.c
M	src/include/nodes/execnodes.h
M	src/include/nodes/pathnodes.h
M	src/include/utils/rel.h
M	src/include/utils/relcache.h
M	src/test/regress/sql/generated_virtual.sql
Falling back to patching base and 3-way merge...
Auto-merging src/test/regress/sql/generated_virtual.sql
Auto-merging src/include/utils/relcache.h
Auto-merging src/include/utils/rel.h
Auto-merging src/include/nodes/pathnodes.h
Auto-merging src/include/nodes/execnodes.h
Auto-merging src/backend/utils/cache/relcache.c
Auto-merging src/backend/utils/adt/selfuncs.c
Auto-merging src/backend/optimizer/util/plancat.c
CONFLICT (content): Merge conflict in src/backend/optimizer/util/plancat.c
Auto-merging src/backend/optimizer/plan/createplan.c
Auto-merging src/backend/optimizer/path/costsize.c
Auto-merging src/backend/executor/execIndexing.c
Auto-merging src/backend/commands/indexcmds.c
Auto-merging src/backend/commands/analyze.c
Auto-merging src/backend/catalog/toasting.c
Auto-merging src/backend/catalog/index.c
Auto-merging src/backend/bootstrap/bootstrap.c
Auto-merging src/backend/access/heap/heapam_handler.c
Patch failed at 0001 v9 enhance-index-support-for-virtual-generated-columns

/ci/repo/worktrees/worktree/rebase-apply/patch:527: trailing whitespace.
 * Upon returning from this function, callers must apply 
/ci/repo/worktrees/worktree/rebase-apply/patch:528: trailing whitespace.
 * ExpandVirtualGeneratedColumns() or RelationGetIndexExpressionsExpand 
warning: 2 lines add whitespace errors.
error: Failed to merge in the changes.
hint: Use 'git am --show-current-patch=diff' to see the failed patch
hint: When you have resolved this problem, run "git am --continue".
hint: If you prefer to skip this patch, run "git am --skip" instead.
hint: To restore the original branch and stop patching, run "git am --abort".
hint: Disable this message with "git config advice.mergeConflict false"