diff options
| author | Alvaro Herrera <alvherre@alvh.no-ip.org> | 2020-01-15 11:02:09 -0300 |
|---|---|---|
| committer | Alvaro Herrera <alvherre@alvh.no-ip.org> | 2020-01-15 11:14:39 -0300 |
| commit | a166d408eb0b35023c169e765f4664c3b114b52e (patch) | |
| tree | 1c432fec482f436cb6611988bff055ff5e27015d /src/backend/utils/misc/sampling.c | |
| parent | 16a4a3d59cd5574fdc697ea16ef5692ce34c54d5 (diff) | |
| download | postgresql-a166d408eb0b35023c169e765f4664c3b114b52e.tar.gz postgresql-a166d408eb0b35023c169e765f4664c3b114b52e.zip | |
Report progress of ANALYZE commands
This uses the progress reporting infrastructure added by c16dc1aca5e0,
adding support for ANALYZE.
Co-authored-by: Álvaro Herrera <alvherre@alvh.no-ip.org>
Co-authored-by: Tatsuro Yamada <tatsuro.yamada.tf@nttcom.co.jp>
Reviewed-by: Julien Rouhaud, Robert Haas, Anthony Nowocien, Kyotaro Horiguchi,
Vignesh C, Amit Langote
Diffstat (limited to 'src/backend/utils/misc/sampling.c')
| -rw-r--r-- | src/backend/utils/misc/sampling.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/src/backend/utils/misc/sampling.c b/src/backend/utils/misc/sampling.c index daf75ee5d97..361c15614e7 100644 --- a/src/backend/utils/misc/sampling.c +++ b/src/backend/utils/misc/sampling.c @@ -32,8 +32,10 @@ * Since we know the total number of blocks in advance, we can use the * straightforward Algorithm S from Knuth 3.4.2, rather than Vitter's * algorithm. + * + * Returns the number of blocks that BlockSampler_Next will return. */ -void +BlockNumber BlockSampler_Init(BlockSampler bs, BlockNumber nblocks, int samplesize, long randseed) { @@ -48,6 +50,8 @@ BlockSampler_Init(BlockSampler bs, BlockNumber nblocks, int samplesize, bs->m = 0; /* blocks selected so far */ sampler_random_init_state(randseed, bs->randstate); + + return Min(bs->n, bs->N); } bool |