MySQL Truncates 0 in VARCHAR field

I have a VARCHAR field in a MySQL table like so -

CREATE TABLE desc(
    `pk` varchar(10) NOT NULL UNIQUE,
    ...
);

The value in pk field is of the type - (xx0000001, xx0000002, ...). But when I insert these into my table the values in pk field get truncated to (xx1, xx2, ...).

How to prevent this?

UPDATE: Adding the INSERTstatement

INSERT INTO desc 开发者_如何学编程(pk) VALUES ("xx0000001");

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It could be that the viewer you are using to LOOK at the values is displaying the info incorrectly because it is trying to interpret that string as a number, or that mysql may be interpreting your numbers as hexadecimal or something strange.

What happens if you do

INSERT INTO desc (pk) VALUES ("xx0000099"); 

Does it come back as xx99? or some other value?

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Looks like you are referencing different tables in your two statements, text and desc?

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Possibly somewhere along your program logic the value is interpreted as a hexadecimal or octal number?