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Commit44bd3ed

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Fix determination of broken LSN in OVERWRITTEN_CONTRECORD
In commitff9f111 I mixed up inconsistent definitions of the LSN ofthe first record in a page, when the previous record ends exactly at thepage boundary. The correct LSN is adjusted to skip the WAL page header;I failed to use that when setting XLogReaderState->overwrittenRecPtr,so at WAL replay time VerifyOverwriteContrecord would refuse to letreplay continue past that record.Backpatch to 10. 9.6 also contains this bug, but it's no longer beingmaintained.Discussion:https://postgr.es/m/45597.1637694259@sss.pgh.pa.us
1 parent4597fd7 commit44bd3ed

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‎src/backend/access/transam/xlogreader.c

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -467,7 +467,7 @@ XLogReadRecord(XLogReaderState *state, char **errormsg)
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*/
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if (pageHeader->xlp_info&XLP_FIRST_IS_OVERWRITE_CONTRECORD)
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{
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state->overwrittenRecPtr=state->currRecPtr;
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state->overwrittenRecPtr=RecPtr;
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ResetDecoder(state);
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RecPtr=targetPagePtr;
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gotorestart;

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