Support idempotent write using SQL options for INSERTS/DELETE/UPDATE/MERGE #1555
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…MERGE Currently, delta supports idempotent write using Dataframe writer options. These writer options are applicable to inserts only. This PR adds support for idempotency using SQL options(DELTA_IDEMPOTENT_DML_TXN_APP_ID and DELTA_IDEMPOTENT_DML_TXN_VERSION) to INSERTS/DELETE/UPDATE/MERGE etc. When both writer options and SQL conf are specified, we will use the writer option values. Idempotent write works by checking the txnVersion and txnAppId from user-provided write options or from session configurations(as a SQL conf). If the same or higher txnVersion has been recorded, then it will skip the write. Add unit tests to test out the idempotency.
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…MERGE Currently, delta supports idempotent write using Dataframe writer options. These writer options are applicable to inserts only. This PR adds support for idempotency using SQL options(`DELTA_IDEMPOTENT_DML_TXN_APP_ID` and `DELTA_IDEMPOTENT_DML_TXN_VERSION`) to INSERTS/DELETE/UPDATE/MERGE etc. When both writer options and SQL conf are specified, we will use the writer option values. Idempotent write works by checking the txnVersion and txnAppId from user-provided write options or from session configurations(as a SQL conf). If the same or higher txnVersion has been recorded, then it will skip the write. Add unit tests to test out the idempotency. Closes delta-io#1555 GitOrigin-RevId: 842e56508137c5913e42bc32267ac74e6f2643ce
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Description
Currently, delta supports idempotent write using Dataframe writer options. These writer options are applicable to inserts only. This PR adds support for idempotency using SQL options(DELTA_IDEMPOTENT_DML_TXN_APP_ID and DELTA_IDEMPOTENT_DML_TXN_VERSION) to INSERTS/DELETE/UPDATE/MERGE etc. When both writer options and SQL conf are specified, we will use the writer option values.
Idempotent write works by checking the txnVersion and txnAppId from user-provided write options or from session configurations(as a SQL conf). If the same or higher txnVersion has been recorded, then it will skip the write.
How was this patch tested?
Add unit tests to test out the idempotency.
Does this PR introduce any user-facing changes?
No