pgsql: Allow to omit boundaries in array subscript

Allow to omit boundaries in array subscript

Allow to omiy lower or upper or both boundaries in array subscript
for selecting slice of array.

Author: YUriy Zhuravlev

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/9246af6799819847faa33baf441251003acbb8fe

Modified Files
--------------
doc/src/sgml/array.sgml | 20 ++++++++++++++
src/backend/executor/execQual.c | 44 +++++++++++++++++++++++-------
src/backend/nodes/copyfuncs.c | 2 ++
src/backend/nodes/equalfuncs.c | 2 ++
src/backend/nodes/outfuncs.c | 2 ++
src/backend/parser/gram.y | 31 +++++++++++++++++++++
src/backend/parser/parse_node.c | 49 ++++++++++++++++++++++------------
src/backend/parser/parse_target.c | 2 +-
src/include/nodes/parsenodes.h | 2 ++
src/test/regress/expected/arrays.out | 40 +++++++++++++++++++++++++++
src/test/regress/output/misc.source | 3 ++-
src/test/regress/sql/arrays.sql | 15 +++++++++++
12 files changed, 184 insertions(+), 28 deletions(-)