Unable to match same value in field.

Hello,

I using postgresql 9.5.1 and I have problem to match value in one field.
Both tables are text:

=# \d list_cards_tbl;

   Column   |  Type   |                          Modifiers
-----------+---------+--------------------------------------------------------------
  recid     | integer | not null default
nextval('list_cards_tbl_recid_seq'::regclass)
  imsi      | text    |
Indexes:
     "imsi_list_cards_tbl" btree (imsi)


=# \d list_newcard_tbl;
    Column   |  Type   |                           Modifiers
------------+---------+---------------------------------------------------------------
  recid      | integer | not null default
nextval('list_newcard_tbl_recid_seq'::regclass)
  serial     | text    |
  imsi       | text    |
Indexes:
     "list_newcard_tbl_pkey" PRIMARY KEY, btree (recid)
     "list_newcard_ser_idx" btree (serial)



=# select imsi, md5(imsi), bit_length(imsi) from list_newcards_tbl where
imsi = '284110000123315';
       imsi       |               md5                | bit_length
-----------------+----------------------------------+------------
  284110000123315 | b438e984c97483bb942eaaed5c0147f3 |        120
(1 row)



So far so good, value of table list_newcard_tbl is fine, problem is in
table list_cards_tbl

=# select imsi from list_cards_tbl where imsi = '284110000123315';
  imsi
------
(0 rows)

No value, lets change to LIKE

=# select imsi, md5(imsi), bit_length(imsi) from list_cards_tbl where
imsi like '284110000123315%';
       imsi       |               md5                | bit_length
-----------------+----------------------------------+------------
  284110000123315 | b438e984c97483bb942eaaed5c0147f3 |        120
(1 row)


Both have the same MD5 sum, also bit length.

With EXPLAIN:

=# explain analyse select imsi from list_cards_tbl where imsi =
'284110000123315';
                                                               QUERY PLAN

--------------------------------------------------------------------------------------------------------------------------------------
  Index Only Scan using imsi_list_card_tbl on list_cards_tbl
(cost=0.28..4.30 rows=1 width=16) (actual time=0.021..0.021 rows=0
loops=1)
    Index Cond: (imsi = '284110000123315'::text)
    Heap Fetches: 0
  Planning time: 0.080 ms
  Execution time: 0.045 ms
(5 rows)

I see only index scan, so I do:

=# reindex table list_cards_tbl;
REINDEX
=# vacuum list_cards_tbl;
VACUUM
=# select imsi, md5(imsi), bit_length(imsi) from list_cards_tbl where
imsi = '284110000123315';
  imsi | md5 | bit_length
------+-----+------------
(0 rows)


Still cant find value.

Some settings:

  enable_bitmapscan                   | on
                      | Enables the planner's use of bitmap-scan plans.
  enable_hashagg                      | on
                      | Enables the planner's use of hashed aggregation
plans.
  enable_hashjoin                     | on
                      | Enables the planner's use of hash join plans.
  enable_indexonlyscan                | on
                      | Enables the planner's use of index-only-scan
plans.
  enable_indexscan                    | on
                      | Enables the planner's use of index-scan plans.
  enable_material                     | on
                      | Enables the planner's use of materialization.
  enable_mergejoin                    | on
                      | Enables the planner's use of merge join plans.
  enable_nestloop                     | on
                      | Enables the planner's use of nested-loop join
plans.
  enable_seqscan                      | on
                      | Enables the planner's use of sequential-scan
plans.
  enable_sort                         | on
                      | Enables the planner's use of explicit sort steps.
  enable_tidscan                      | on
                      | Enables the planner's use of TID scan plans.
  client_encoding                     | UTF8
                      | Sets the client's character set encoding.
  lc_collate                          | bg_BG.utf8
                      | Shows the collation order locale.
  lc_ctype                            | bg_BG.utf8
                      | Shows the character classification and case
conversion locale.
  lc_messages                         | bg_BG.utf8
                      | Sets the language in which messages are
displayed.
  lc_monetary                         | bg_BG.utf8
                      | Sets the locale for formatting monetary amounts.
  lc_numeric                          | bg_BG.utf8
                      | Sets the locale for formatting numbers.
  lc_time                             | bg_BG.utf8
                      | Sets the locale for formatting date and time
values.
  server_encoding                     | UTF8
                      | Sets the server (database) character set
encoding.
  server_version                      | 9.5.1
                      | Shows the server version.
  server_version_num                  | 90501
                      | Shows the server version as an integer.



Can some one point me what can be the problem with this value and how to
resolve it ? I think probably index problem but I reindex that table and
problem is not resolved or some broken utf8 char but md5 and bit_length
should not to be equal.


Regards,
HS