我如何參數化這個 jsonb 數組包含查詢？

Question

我有以下 sql：

WITH
ni AS (SELECT DISTINCT ON(issuercik) issuercik FROM new_insiders
WHERE date_filed > (CURRENT_DATE - INTERVAL '360 day')::date AND ( tickers @> '["MSFT"]'::jsonb ) ORDER BY issuercik, date_filed DESC),
t AS (SELECT cik FROM companies WHERE data->'tickers' @> '["MSFT"]'::jsonb ) 
SELECT ni.issuercik AS first, t.cik AS second FROM ni FULL OUTER JOIN t ON ni.issuercik = t.cik;

這給了我（如預期的那樣）：

789019 | 789019

現在，我需要參數化查詢，但無法：

DEALLOCATE stmt;
PREPARE stmt AS WITH
ni AS (SELECT DISTINCT ON(issuercik) issuercik FROM new_insiders
WHERE date_filed > (CURRENT_DATE - INTERVAL '360 day')::date AND ( tickers @> '["$1"]'::jsonb ) ORDER BY issuercik, date_filed DESC),
t AS (SELECT cik FROM companies WHERE data->'tickers' @> '["$1"]'::jsonb ) 
SELECT ni.issuercik AS first, t.cik AS second FROM ni FULL OUTER JOIN t ON ni.issuercik = t.cik;

EXECUTE stmt('MSFT');

我得到一個空行，那是因為它實際上是在搜索"$1" 。 我嘗試刪除雙引號然后它抱怨

ERROR:  invalid input syntax for type json
LINE 4: ...DATE - INTERVAL '360 day')::date AND ( tickers @> '[$1]'::js...
                                                             ^
DETAIL:  Token "$" is invalid.

我不知道如何解決這個問題。

Answer 1

如果只想檢查數組是否包含給定值，可以使用? 而不是@> 。

那看起來像：

DEALLOCATE stmt;

PREPARE stmt AS
WITH
    ni AS (
        SELECT DISTINCT ON(issuercik) issuercik 
        FROM new_insiders
        WHERE 
            date_filed > (CURRENT_DATE - INTERVAL '360 day')::date 
            AND tickers ? $1
        ORDER BY issuercik, date_filed DESC
    ),
    t AS (
        SELECT cik 
        FROM companies 
        WHERE data->'tickers' ? $1
    ) 
SELECT ni.issuercik AS first, t.cik AS second 
FROM ni 
FULL OUTER JOIN t ON ni.issuercik = t.cik;

EXECUTE stmt('MSFT');