This is maddening! Code in question has been running for over 5 years.
Here's the scoop....
I am doing an INSERT...SELECT into a table with a primary key that is an identity column. I do not specify the key when I insert - SQL Server generates it as expected.
I am doing the insert in a stored procedure that I call in a loop (for loop in SSIS, actually). The stored procedure will insert rows in batches (configurable). It might insert 1000 rows at a time or it might insert 50,000 - doesn't matter. It will work for a random number of calls (inserting thousands of rows) and then it will fail, out of the blue, with a
Violation of primary key / duplicate
error. If I check the identity seed - it is correct. If I kick off the process again it will work fine, for a while.
The values being inserted are coming from 2 tables that I join together, as if that matters.
The bulk of my code is below:
WHILE @pk <= @max_pk
BEGIN
INSERT INTO tbl_claim_line (fk_batch_control_group, fk_claim, fk_provider, service_from_date, service_to_date, allowed, net_paid, COB, flex_1, flex_2, flex_3, flex_4)
SELECT
@fk_batch_control_group
, c.pk_claim
, p.pk_provider
, i.date_of_service_from
, i.date_of_service_to
, i.allowed_amount
, i.net_paid_amount
, i.cob_amount
, i.claimline_flex_1
, i.claimline_flex_2
, i.claimline_flex_3
, i.claimline_flex_4
FROM
tbl_import i
INNER JOIN
tbl_import__claim c ON i.claim_number = c.claim_number
LEFT JOIN
tbl_import__provider p ON ISNULL(i.provider_type,'') = ISNULL(p.provider_type,'')
AND ISNULL(i.provider_specialty,'') = ISNULL(p.provider_specialty,'')
AND ISNULL(i.provider_zip_code,'') = ISNULL(p.provider_zip_code,'')
WHERE
pk_import = @pk
UPDATE tbl_import
SET fk_claim_line = SCOPE_IDENTITY()
WHERE pk_import = @pk
SET @pk += 1
END
--TABLE DEFINITIONS...
CREATE TABLE [dbo].[tbl_claim_line](
[fk_batch_control_group] [int] NOT NULL,
[fk_claim] [int] NOT NULL,
[fk_provider] [int] NULL,
[service_from_date] [date] NULL,
[service_to_date] [date] NULL,
[allowed] [money] NULL,
[net_paid] [money] NULL,
[COB] [money] NULL,
[flex_1] [varchar](200) NULL,
[flex_2] [varchar](200) NULL,
[flex_3] [varchar](200) NULL,
[flex_4] [varchar](200) NULL,
[pk_claim_line] [int] IDENTITY(1,1) NOT NULL,
[insert_date] [datetime] NOT NULL,
CONSTRAINT [PK_tbl_claim_line] PRIMARY KEY NONCLUSTERED
(
[pk_claim_line] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
SET ANSI_PADDING OFF
GO
ALTER TABLE [dbo].[tbl_claim_line] WITH CHECK
ADD CONSTRAINT [FK_tbl_claim_line_tbl_batch_control_group]
FOREIGN KEY([fk_batch_control_group])
REFERENCES [dbo].[tbl_batch_control_group] ([pk_batch_control_group])
GO
ALTER TABLE [dbo].[tbl_claim_line] CHECK CONSTRAINT [FK_tbl_claim_line_tbl_batch_control_group]
GO
ALTER TABLE [dbo].[tbl_claim_line] WITH CHECK
ADD CONSTRAINT [FK_tbl_claim_line_tbl_claim]
FOREIGN KEY([fk_claim])
REFERENCES [dbo].[tbl_claim] ([pk_claim])
ON DELETE CASCADE
GO
ALTER TABLE [dbo].[tbl_claim_line] CHECK CONSTRAINT [FK_tbl_claim_line_tbl_claim]
GO
ALTER TABLE [dbo].[tbl_claim_line] WITH CHECK
ADD CONSTRAINT [FK_tbl_claim_line_tbl_provider]
FOREIGN KEY([fk_provider])
REFERENCES [dbo].[tbl_provider] ([pk_provider])
GO
ALTER TABLE [dbo].[tbl_claim_line] CHECK CONSTRAINT [FK_tbl_claim_line_tbl_provider]
GO
ALTER TABLE [dbo].[tbl_claim_line] ADD CONSTRAINT [DF_tbl_claim_line__insert_date] DEFAULT (getdate()) FOR [insert_date]
GO
----second table
CREATE TABLE [dbo].[tbl_import](
[fk_claim_line] [int] NULL,
[member_id] [varchar](50) NULL,
[member_card_id] [varchar](50) NULL,
[member_first_name] [varchar](50) NULL,
[member_last_name] [varchar](50) NULL,
[member_dob] [varchar](50) NULL,
[member_gender] [varchar](50) NULL,
[member_subscriber_relationship_code] [varchar](50) NULL,
[member_address_line_1] [varchar](100) NULL,
[member_address_line_2] [varchar](100) NULL,
[member_city] [varchar](50) NULL,
[member_state] [varchar](50) NULL,
[member_zip] [varchar](50) NULL,
[member_phone] [varchar](50) NULL,
[member_email] [varchar](50) NULL,
[subscriber_id] [varchar](50) NULL,
[group_line_of_business] [varchar](50) NULL,
[group_product] [varchar](50) NULL,
[group_employer] [varchar](50) NULL,
[provider_first_name] [varchar](50) NULL,
[provider_last_or_full_name] [varchar](200) NULL,
[provider_type] [varchar](200) NULL,
[provider_specialty] [varchar](400) NULL,
[provider_zip_code] [varchar](50) NULL,
[provider_tax_id] [varchar](50) NULL,
[medical_code_1] [varchar](10) NULL,
[medical_code_1_description] [varchar](500) NULL,
[medical_code_2] [varchar](10) NULL,
[medical_code_2_description] [varchar](500) NULL,
[medical_code_3] [varchar](10) NULL,
[medical_code_3_description] [varchar](500) NULL,
[medical_code_4] [varchar](10) NULL,
[medical_code_4_description] [varchar](500) NULL,
[medical_code_5] [varchar](10) NULL,
[medical_code_5_description] [varchar](500) NULL,
[medical_code_6] [varchar](10) NULL,
[medical_code_6_description] [varchar](500) NULL,
[medical_code_7] [varchar](10) NULL,
[medical_code_7_description] [varchar](500) NULL,
[medical_code_8] [varchar](10) NULL,
[medical_code_8_description] [varchar](500) NULL,
[medical_code_9] [varchar](10) NULL,
[medical_code_9_description] [varchar](500) NULL,
[medical_code_10] [varchar](10) NULL,
[medical_code_10_description] [varchar](500) NULL,
[medical_code_11] [varchar](10) NULL,
[medical_code_11_description] [varchar](500) NULL,
[medical_code_12] [varchar](10) NULL,
[medical_code_12_description] [varchar](500) NULL,
[medical_code_13] [varchar](10) NULL,
[medical_code_13_description] [varchar](500) NULL,
[medical_code_14] [varchar](10) NULL,
[medical_code_14_description] [varchar](500) NULL,
[medical_code_15] [varchar](10) NULL,
[medical_code_15_description] [varchar](500) NULL,
[medical_code_16] [varchar](10) NULL,
[medical_code_16_description] [varchar](500) NULL,
[date_of_service_from] [varchar](50) NULL,
[date_of_service_to] [varchar](50) NULL,
[claim_number] [varchar](50) NULL,
[claim_line_number] [varchar](50) NULL,
[original_claim_number] [varchar](50) NULL,
[allowed_amount] [varchar](50) NULL,
[net_paid_amount] [varchar](50) NULL,
[cob_amount] [varchar](50) NULL,
[date_paid] [varchar](50) NULL,
[member_flex_1] [varchar](200) NULL,
[member_flex_2] [varchar](200) NULL,
[member_flex_3] [varchar](200) NULL,
[member_flex_4] [varchar](200) NULL,
[claim_flex_1] [varchar](200) NULL,
[claim_flex_2] [varchar](200) NULL,
[claim_flex_3] [varchar](200) NULL,
[claim_flex_4] [varchar](200) NULL,
[claimline_flex_1] [varchar](200) NULL,
[claimline_flex_2] [varchar](200) NULL,
[claimline_flex_3] [varchar](200) NULL,
[claimline_flex_4] [varchar](200) NULL,
[pk_import] [int] IDENTITY(1,1) NOT NULL,
CONSTRAINT [PK_tbl_import] PRIMARY KEY NONCLUSTERED
(
[pk_import] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
I ran into this and much like user3170349, it was a seed issue on the column. I'm adding some additional info, however.
First, you can run this to figure out if you have a seed problem:
DBCC CHECKIDENT ('TABLE_NAME_GOES_HERE', NORESEED);
This will give you information which will read something like this:
Checking identity information: current identity value 'XXXX', current column value 'YYYY'.
If YYYY is larger than XXXX, then you have a problem and need to RESEED the table to get things going again. You can do so with the following command:
DBCC CHECKIDENT ('TABLE_NAME_GOES_HERE', RESEED, ZZZZZ);
Where ZZZZ is the reseed value. That value should be at least one higher than YYYY. YMMV, so pick a value that is appropriate for your situation.
"Code in question has been running for over 5 years." "It might insert 1000 records at a time or it might insert 50,000 "
Is it possible you have finally overflowed the integer type of the primary key?
Did it wrap around and is now starting over? That would cause duplicate primary keys.
来源：https://stackoverflow.com/questions/20979300/violation-of-primary-key-error-on-identity-column