Optimize the Query in PostgreSQL - Takes too long - sql

Question

Made this view to see all the 'socios' turned their status_contrato to 301 in the last 30 days
The thing is the query takes around 30 secs, and I have to get down to 20 secs max
CREATE OR REPLACE VIEW public.socios_desligados_inadimplencis_ultimos_30_dias_v2
AS SELECT tb.nome,
tb.cpf,
tb.email,
tb.plano,
tb.status_contrato,
CASE
WHEN ad.dt_inicial IS NULL THEN tb.dt_inicial
ELSE ad.dt_inicial
END AS data_admissao,
tb.dthr_desligamento,
tb.total_parcelas_pagas
FROM ( SELECT p.idpessoa,
p.nome,
p.cpf,
p.email,
pl.dscplano AS plano,
ea.dscestado_ativacao AS status_contrato,
eal.ins_dthr AS dthr_desligamento,
cr.valor_total AS total_parcelas_pagas,
con.dt_inicial
FROM base_pessoa p
JOIN ( SELECT gs_contrato.idpessoa,
gs_contrato.idcontrato,
gs_contrato.idplano,
gs_contrato.idestado_ativacao,
gs_contrato.dt_inicial
FROM gs_contrato
WHERE gs_contrato.idestado_ativacao::text = '301'::text AND gs_contrato.alt_dthr >= (CURRENT_DATE - 30)) con ON p.idpessoa::text = con.idpessoa::text
JOIN gs_plano pl ON con.idplano::text = pl.idplano::text
JOIN gs_estado_ativacao ea ON con.idestado_ativacao::text = ea.idestado_ativacao::text
JOIN ( SELECT row_number() OVER (PARTITION BY lg.idcontrato ORDER BY lg.ins_dthr DESC) AS linha,
lg.idcontrato,
lg.idestado_ativacao,
lg.ins_dthr
FROM gs_estado_ativacao_l lg
JOIN gs_contrato con_1 ON con_1.idcontrato::text = lg.idcontrato::text
WHERE lg.idestado_ativacao::text = '301'::text AND con_1.idestado_ativacao::text = '301'::text AND con_1.alt_dthr >= (CURRENT_DATE - 30) AND lg.ins_dthr >= (CURRENT_DATE - 30)) eal ON con.idcontrato::text = eal.idcontrato::text AND eal.linha = 1
JOIN ( SELECT ccr.idcontrato,
sum(ccr.valor - ccr.valor_desconto + ccr.valor_juros + ccr.valor_multa + ccr.valor_adesao + ccr.valor_acrescimo) AS valor_total
FROM cx_conta_receber ccr
JOIN gs_contrato c ON c.idcontrato::text = ccr.idcontrato::text
WHERE ccr.status::text = 'PA'::text AND c.idestado_ativacao::text = '301'::text AND c.alt_dthr >= (CURRENT_DATE - 30)
GROUP BY ccr.idcontrato) cr ON cr.idcontrato::text = con.idcontrato::text) tb
JOIN data_adesao ad ON tb.idpessoa::text = ad.idpessoa::text;

Answer 1

I checked your query. I write some recommendations for performance.
Recommended using materialized CTE (with as materialized) instead of subqueries.
Maybe you have used subqueries or table-joining to get a few values. You can use return-table functions instead at this.
Check your indexes. Fields are used on the conditions (where or join), on the order by or group by commands must be indexed.
Not recommended use casting fields or set functions to fields in the conditions. In this time DB can not use indexes. If you need set functions to fields in the conditions, then recommended creating expression index (function-based index).
Your query has some cast types:
WHERE gs_contrato.idestado_ativacao::text = '301'::text
AND gs_contrato.alt_dthr >= (CURRENT_DATE - 30)) con ON
p.idpessoa::text = con.idpessoa::text
JOIN gs_plano pl
ON con.idplano::text = pl.idplano::text
JOIN gs_estado_ativacao ea
ON con.idestado_ativacao::text = ea.idestado_ativacao::text
WHERE lg.idestado_ativacao::text = '301'::text
AND con_1.idestado_ativacao::text = '301'::text
AND con_1.alt_dthr >= (CURRENT_DATE - 30)
AND lg.ins_dthr >= (CURRENT_DATE - 30)) eal ON con.idcontrato::text = eal.idcontrato::text AND eal.linha = 1
If you need cast types, so use the same cast types at creating indexes. Expression index.
And the latest and most important recommendation is that use explain analyze for this query to get execute plan of DB.