Minimalistic extended query impl

[alex-dukhno]

Link with #574

[coveralls]

Pull Request Test Coverage Report for Build 820891624

• 606 of 888 (68.24%) changed or added relevant lines in 19 files are covered.
• 232 unchanged lines in 7 files lost coverage.
• Overall coverage increased (+1.2%) to 65.995%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
node_engine/src/query_executor/tests/type_constraints.rs	2	3	66.67%
src/main.rs	0	1	0.0%
node_engine/src/query_executor/tests.rs	27	29	93.1%
node_engine/src/lib.rs	37	40	92.5%
node_engine/src/node_engine.rs	0	4	0.0%
postgre_sql/wire_protocol/src/lib.rs	0	4	0.0%
node_engine/src/query_executor.rs	63	68	92.65%
sql_engine/query_analyzer/src/lib.rs	4	10	40.0%
postgre_sql/query_response/src/lib.rs	13	22	59.09%
postgre_sql/wire_protocol/payload/src/lib.rs	0	13	0.0%

Files with Coverage Reduction	New Missed Lines	%
sql_engine/data_manipulation/typed_tree/src/lib.rs	1	66.18%
data_repr/binary/src/lib.rs	2	39.62%
sql_engine/query_analyzer/src/lib.rs	2	91.24%
storage/src/lib.rs	2	67.96%
sql_engine/query_planner/src/lib.rs	36	46.15%
sql_engine/catalog/src/lib.rs	90	46.4%
postgre_sql/query_response/src/lib.rs	99	25.48%

Totals
Change from base Build 814495247:	1.2%
Covered Lines:	2816
Relevant Lines:	4267

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💛 - Coveralls