ERROR: check constraint is violated by some row I've got the following error:

ERROR: check constraint "cc_at_least_one_mapping_needed" is violated by some row


Query:

ALTER TABLE integrations.tax_aggregates
DROP COLUMN IF EXISTS myob_id,
ADD COLUMN myob_id integrations.FOREIGN_IDENTIFIER;
COMMENT ON COLUMN integrations.tax_aggregates.myob_id IS 'Foreign key for MYOB';

ALTER TABLE integrations.tax_aggregates DROP CONSTRAINT IF EXISTS cc_at_least_one_mapping_needed,
ADD CONSTRAINT cc_at_least_one_mapping_needed CHECK ((("qb_id" IS NOT NULL) :: INTEGER +
                                                      ("xero_id" IS NOT NULL) :: INTEGER +
                                                      ("freshbooks_id" IS NOT NULL) :: INTEGER +
                                                      ("myob_id" IS NOT NULL) :: INTEGER +
                                                      ("ppy_id" IS NOT NULL) :: INTEGER) &gt; 0);

                                                      DROP INDEX IF EXISTS integrations.ix_tax_aggregates_myob_ids_ids;
CREATE INDEX ix_tax_aggregates_myob_ids_ids ON integrations.tax_aggregates USING BTREE (myob_id)
  WHERE myob_id IS NOT NULL;


What am I doing wrong? How can I solve the problem?

UPDATED:

Query:

ALTER TABLE integrations.accounts
DROP COLUMN IF EXISTS myob_settings,
ADD COLUMN myob_settings JSON;

ALTER TABLE integrations.accounts DROP CONSTRAINT IF EXISTS cc_at_least_one_setting_needed,
    ADD CONSTRAINT cc_at_least_one_setting_needed CHECK (("qb_settings" IS NOT NULL) or
                                                          ("xero_settings" IS NOT NULL) or
                                                          ("freshbooks_settings" IS NOT NULL) or
                                                          ("myob_settings" IS NOT NULL) or
                                                          ("ppy_settings" IS NOT NULL));


Select results:

SELECT * FROM integrations.accounts WHERE qb_settings IS NOT NULL AND xero_settings IS NOT NULL and freshbooks_settings IS NOT NULL AND myob_settings IS NOT NULL AND ppy_settings IS NOT NULL


It returns 0 rows



SELECT * FROM integrations.accounts WHERE qb_settings IS NULL OR xero_settings IS NULL OR freshbooks_settings IS NULL OR myob_settings IS NULL OR ppy_settings IS NULL;


RETURN (59 rows):

"account_id"|"global_settings"|"qb_settings"|"xero_settings"|"freshbooks_settings"|"myob_settings"|"ppy_settings"

"30374"|""|"{""id"":""1412494720"",""active"":true,""settings"":{""secret"":""iisCCNSiH4jmRArWUPi0rxa9LntQdAA3kc7lbLtf"",""token"":""qyprdigrVpUijVKDxJ72iBZrnh4tvlwMA1QuVxxyPSgLIz4j"",""expires"":""2016-01-31 04:34:37""},""plan"":""QuickBooks Online Essentials""}"|""|""|""|""


ERROR:  check constraint "cc_at_least_one_setting_needed" is violated by some row
You have NULLs that violate the CHECK CONSTRAINT.

To verify that this is indeed the problem, run this SQL.

SELECT * FROM integrations.accounts WHERE qb_settings IS NOT NULL OR            
xero_settings IS NOT NULL OR... (fill in the fields that correspond to 
those in the CONSTRAINT).


This will give you all the records that have fields which have a NULL value which violate the CONSTRAINT.

From your SQL, you have 59 such records - that's why you're getting the error. 

What you need to do to rectify this is to run SQL similar to the following:

UPDATE My_Table SET My_Field = 0 WHERE My_Field IS NULL.


Obviously it is up to you to ensure that the values that you set correspond to your system's business logic and other system requirements.