[COMMITTERS] pgsql: Fix failure with whole-row reference to a subquery.

Fix failure with whole-row reference to a subquery. Simple oversight in commit 1cb108efb0e60d87e4adec38e7636b6e8efbeb57 --- recursively examining a subquery output column is only sane if the original Var refers to a single output column. Found by Kevin Grittner. Branch -- master Details ---

[COMMITTERS] pgsql: Fix failure with whole-row reference to a subquery.

Fix failure with whole-row reference to a subquery. Simple oversight in commit 1cb108efb0e60d87e4adec38e7636b6e8efbeb57 --- recursively examining a subquery output column is only sane if the original Var refers to a single output column. Found by Kevin Grittner. Branch -- REL9_2_STABLE Deta

[COMMITTERS] pgsql: Fix failure with whole-row reference to a subquery.

Fix failure with whole-row reference to a subquery. Simple oversight in commit 1cb108efb0e60d87e4adec38e7636b6e8efbeb57 --- recursively examining a subquery output column is only sane if the original Var refers to a single output column. Found by Kevin Grittner. Branch -- REL9_3_STABLE Deta