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Editorial Team
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Asked: 2026-05-23T17:35:08+00:00

i have this sqlite table: CREATE TABLE frames (videomd5 TEXT, framemd5 TEXT, type TEXT,

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i have this sqlite table:


CREATE TABLE frames (videomd5 TEXT, framemd5 TEXT, type TEXT, PRIMARY KEY (videomd5, framemd5))

As you can see, the table has a combined PRIMARY KEY because it is allowed that one of the fields has the same values but never both at once.

Currently I’m performing a check like this


SELECT framemd5 FROM frames WHERE framemd5='$digest' AND videomd5='$videomd5'

before adding something to the table to avoid a PRIMARY KEY CONTRAINTs but i feel there is a better way to handle it. Should i fire the INSERT without checking first and handel the CONSTRAINT afterwards? If so, how is this best done in perl?

Thank you

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1 Answer

  1. Editorial Team

    Yes you can use the “OR IGNORE” in your insert, eg:

    sqlite> create table bla (id INT PRIMARY KEY);
sqlite> insert into bla values (1);
sqlite> insert into bla values (1);
Error: column id is not unique
sqlite> insert or ignore into bla values (1);
sqlite>

    Refer to the official doc for the details:
    http://www.sqlite.org/syntaxdiagrams.html#insert-stmt

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