PG import csv file + scheme describe doesn't work.

[pashandor789]

a) schema bug steps:

1. creating table

--!syntax_pg

CREATE TABLE test
(
    kek           INTEGER PRIMARY KEY
);

2. scheme describe command

./ydb -e grpc://localhost:2136 -d /Root/test scheme describe test --stats
<table> test
Status: INTERNAL_ERROR
Issues: 
<main>: Fatal: /opt/buildagent/work/3e574e3efc81dc20/tag/ydb/core/ydb_convert/table_description.cpp:126: It is not allowed to create NOT NULL column with pg type, code: 1

b) import file csv -p test test.csv

1. creating table

--!syntax_pg

CREATE TABLE test
(
    kek           INTEGER PRIMARY KEY
);

2. creating csv file

echo 228 > test.csv

3. import css command

./ydb -e grpc://localhost:2136 -d /Root/test import file csv -p test test.csv


Status: INTERNAL_ERROR
Issues: 
<main>: Fatal: /opt/buildagent/work/3e574e3efc81dc20/tag/ydb/core/ydb_convert/table_description.cpp:126: It is not allowed to create NOT NULL column with pg type, code: 1

[qrort]

removing ENSURE allows both operations to complete. However, there is a problem that ydb_cli does not account the not_nool boolean in scheme describe, thus making pg and notnull pg types non-distinguishable.

ydb/ydb/public/api/protos/ydb_table.proto

Line 354 in 5200012

optional bool not_null = 4;