PREFETCH_MODE Query Option (<keyword keyref="impala26"/> or higher only)

PREFETCH_MODE Query Option (<keyword keyref="impala26"/> or higher only) PREFETCH_MODE

PREFETCH_MODE query option Determines whether the prefetching optimization is applied during join query processing.

Type: numeric (0, 1) or corresponding mnemonic strings (NONE, HT_BUCKET).

Default: 1 (equivalent to HT_BUCKET)

The default mode is 1, which means that hash table buckets are prefetched during join query processing.

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