Make subquery aliases optional in the FROM clause. This allows aliases for sub-SELECTs and VALUES clauses in the FROM clause to be omitted.
This is an extension of the SQL standard, supported by some other database systems, and so eases the transition from such systems, as well as removing the minor inconvenience caused by requiring these aliases. Patch by me, reviewed by Tom Lane. Discussion: https://postgr.es/m/CAEZATCUCGCf82=hxd9n5n6xghpyypqnxw8hneeh+up7ynal...@mail.gmail.com Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/bcedd8f5fce0b69970cf0cee7bca560833d05869 Modified Files -------------- doc/src/sgml/ref/select.sgml | 16 ++++++-- src/backend/parser/analyze.c | 19 ++++++--- src/backend/parser/gram.y | 44 --------------------- src/backend/parser/parse_clause.c | 18 +++------ src/backend/parser/parse_relation.c | 29 ++++++++++---- src/backend/utils/adt/ruleutils.c | 6 ++- src/include/parser/parse_node.h | 7 +++- src/interfaces/ecpg/preproc/ecpg.addons | 6 --- src/test/regress/expected/subselect.out | 69 +++++++++++++++++++++++++++++++++ src/test/regress/sql/subselect.sql | 31 +++++++++++++++ 10 files changed, 164 insertions(+), 81 deletions(-)
