Spanner supports creating tables without defining primary keys

UpdateJul 28, 2026VerifiedAdded Sep 22, 2026

Spanner supports creating tables without defining primary keys. When you create a table without a primary key, Spanner creates a hidden rowid column that serves as the primary key. For more information, see Create a table without defining a primary key .

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https://docs.cloud.google.com/spanner/docs/release-notes#July_28_2026

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