Web Reference: You cannot insert rows into a read-only materialized view. If you insert rows into a writable materialized view, then the database inserts the rows into the underlying container table. Apr 10, 2022 · Consider posting the whole case - table description, INSERT statement, result of subsequent SELECT (which - as you say - proves that nothing was inserted). By the way, if you checked that in another session, you won't see anything until you commit changes you've made. Jan 16, 2026 · In this blog, we’ll demystify the `ORA-01722` error, focusing specifically on why it occurs in `INSERT` statements. We’ll break down the most common triggers, walk through step-by-step diagnosis techniques, and provide actionable solutions to fix it.
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