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Check if there are blocks left in columnar_scan_analyze_next_block 

In PG17, the outer loop in acquire_sample_rows() changed
from
while (BlockSampler_HasMore(&bs))
to
while (table_scan_analyze_next_block(scan, stream))

Relevant PG commit:
041b96802efa33d2bc9456f2ad946976b92b5ae1
041b96802e

It is expected that the scan_analyze_next_block function will
check if there are any blocks left. So we add that check in
columnar_scan_analyze_next_block
m3hm3t/pg17_isolation_test_cmd_from
naisila 2024-07-29 11:14:46 +02:00
parent df9c7b45b2
commit 7eb0ad5c91
No known key found for this signature in database
GPG Key ID: A824BA9862D73E6D
1 changed files with 12 additions and 0 deletions
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12
src/backend/columnar/columnar_tableam.c
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@ -1437,7 +1437,19 @@ columnar_scan_analyze_next_block(TableScanDesc scan,
* to pages boundaries. So not much to do here. We return true anyway
* so acquire_sample_rows() in analyze.c would call our
* columnar_scan_analyze_next_tuple() callback.
* In PG17, we return false in case there is no buffer left, since
* the outer loop changed in acquire_sample_rows(), and it is
* expected for the scan_analyze_next_block function to check whether
* there are any blocks left in the block sampler.
*/
#if PG_VERSION_NUM >= PG_VERSION_17
Buffer buf = read_stream_next_buffer(stream, NULL);
if (!BufferIsValid(buf))
{
return false;
}
ReleaseBuffer(buf);
#endif
return true;
}