Pessoal, estou tendo o explain abaixo para uma view. O que não entendo é por
que o pg não está usando a chave primeira para fazer um join com a tabela de
compras (Seq Scan on compras c (cost=0.00..5125.69 rows=79569 width=26)).
Alguém pode me orientar?
Jean Domingues
"QUERY PLAN"
"Sort (cost=54371.15..54378.52 rows=2946 width=641)"
" Sort Key: nfe.numero_nf, nfe.id"
" -> Hash Left Join (cost=27995.71..54171.94 rows=2946 width=522)"
" Hash Cond: (nfe.id_contingencia = ctg.id)"
" -> Hash Left Join (cost=27994.67..53371.78 rows=2946 width=520)"
" Hash Cond: (v.id_romaneio = r1.id)"
" -> Hash Left Join (cost=26146.90..51454.25 rows=2946
width=508)"
" Hash Cond: (c.id_romaneio_devolucao = r2.id)"
" -> Hash Left Join (cost=24299.13..49543.67 rows=2946
width=496)"
" Hash Cond: (nfe.id_func_cancelamento = t3.id)"
" -> Nested Loop (cost=23519.68..48731.05 rows=2946
width=474)"
" -> Seq Scan on nfe_filas f (cost=0.00..1.04
rows=1 width=11)"
" Filter: (id = 1)"
" -> Hash Left Join (cost=23519.68..48700.55
rows=2946 width=465)"
" Hash Cond: (nfe.id_nat_operacao =
nop1.id)"
" -> Hash Left Join
(cost=23518.19..48684.77 rows=2946 width=441)"
" Hash Cond: (nfe.id_terceiro =
t1.id)"
" -> Nested Loop Left Join
(cost=22738.74..47842.72 rows=2946 width=396)"
" -> Hash Left Join
(cost=22738.74..28418.97 rows=2946 width=377)"
" Hash Cond:
(nfe.id_func_emissao = t2.id)"
" -> Hash Right Join
(cost=21959.29..27582.41 rows=2946 width=355)"
" Hash Cond: (c.id
= nfe.id_compra)"
" -> Seq Scan on
compras c (cost=0.00..5125.69 rows=79569 width=26)"
" -> Hash
(cost=21922.47..21922.47 rows=2946 width=337)"
" -> Bitmap
Heap Scan on nfe (cost=209.10..21922.47 rows=2946 width=337)"
"
Recheck Cond: (((id_empresa = 1) AND (dh_envio_email IS NULL)) OR ((id_empresa
= 1) AND (dh_cancelamento IS NOT NULL)))"
"
Filter: ((((dh_cancelamento IS NULL) AND (dh_envio_email IS NULL) AND (NOT
nao_enviar_email)) OR ((dh_cancelamento IS NOT NULL) AND (dh_envio_email_canc
IS NULL) AND (NOT nao_enviar_email_canc))) AND ((COALESCE(email, ''::character
varying))::text <> ''::text) AND (id_fila = 1) AND (status_retorno =
'1'::bpchar))"
" ->
BitmapOr (cost=209.10..209.10 rows=7464 width=0)"
"
-> Bitmap Index Scan on nfe_idx12 (cost=0.00..203.05 rows=7455 width=0)"
"
Index Cond: ((id_empresa = 1) AND (dh_envio_email IS NULL))"
"
-> Bitmap Index Scan on nfe_idx7 (cost=0.00..4.58 rows=9 width=0)"
"
Index Cond: ((id_empresa = 1) AND (dh_cancelamento IS NOT NULL))"
" -> Hash
(cost=600.31..600.31 rows=14331 width=30)"
" -> Seq Scan on
terceiros t2 (cost=0.00..600.31 rows=14331 width=30)"
" -> Index Scan using
vendas_pkey on vendas v (cost=0.00..6.58 rows=1 width=27)"
" Index Cond: (id =
nfe.id_venda)"
" -> Hash (cost=600.31..600.31
rows=14331 width=49)"
" -> Seq Scan on terceiros t1
(cost=0.00..600.31 rows=14331 width=49)"
" -> Hash (cost=1.22..1.22 rows=22
width=32)"
" -> Seq Scan on
naturezas_operacoes nop1 (cost=0.00..1.22 rows=22 width=32)"
" -> Hash (cost=600.31..600.31 rows=14331 width=30)"
" -> Seq Scan on terceiros t3
(cost=0.00..600.31 rows=14331 width=30)"
" -> Hash (cost=1621.23..1621.23 rows=18123 width=20)"
" -> Seq Scan on romaneios r2 (cost=0.00..1621.23
rows=18123 width=20)"
" -> Hash (cost=1621.23..1621.23 rows=18123 width=20)"
" -> Seq Scan on romaneios r1 (cost=0.00..1621.23
rows=18123 width=20)"
" -> Hash (cost=1.02..1.02 rows=2 width=6)"
" -> Seq Scan on nfe_contingencia ctg (cost=0.00..1.02 rows=2
width=6)"
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