Question

我的查询出现此错误，但我无法弄清楚它有什么问题：

查询指定的返回元组有135列，但交叉表返回295。

这是我的查询:(以粗体突出显示的部分在pgAdmin中单独运行时会返回相同的行数。）

SELECT X.*, pi.productcode, pi.productitemdesc, pi.retailsalesprice, cat.productcategorydesc FROM ( 
SELECT * FROM crosstab ( 
'SELECT a.productitem AS productitemid, l.locationcode, (CASE WHEN SUM(a.netamount) IS NOT NULL THEN SUM(a.netamount) ELSE 0 END) || ''#'' || (CASE WHEN SUM(a.quantity) IS NOT NULL THEN SUM(a.quantity) ELSE 0 END) AS sales_qty FROM invoiceitem a INNER JOIN invoiceinfo b ON a.invoice = b.invoiceid INNER JOIN locationinfo l ON b.location = l.locationid WHERE b.status !=2 AND l.locationtype = 1 AND l.status = 1 AND TO_CHAR (b.invoicedate, ''YYYY-MM-DD'')>=''2018-03-01'' AND TO_CHAR (b.invoicedate, ''YYYY-MM-DD'')<=''2018-03-03'' GROUP BY a.productitem, l.locationcode ORDER BY a.productitem', 
'SELECT l.locationcode FROM locationinfo l INNER JOIN invoiceinfo b ON b.location = l.locationid
 WHERE b.status !=2 AND l.locationtype = 1 AND l.status = 1 AND TO_CHAR (b.invoicedate, ''YYYY-MM-DD'')>=''2018-03-01'' AND TO_CHAR (b.invoicedate, ''YYYY-MM-DD'')<=''2018-03-03'' GROUP BY l.locationcode order by l.locationcode') 
 AS (productitemid int, "0007" text,"BE101" text,"BE1013" text,"BE1014" text,"BE102" text,"BE103" text,"BE1034" text,"BE104" text,"BE1040" text,"BE1043" text,"BE1044" text,"BE1045" text,"BE1046" text,"BE105" text,"BE106" text,"BE107" text,"BE108" text,"BE109" text,"BE110" text,"BE111" text,"BE112" text,"BE123" text,"BE1265" text,"BE1266" text,"BE1271" text,"BE1272" text,"BE1273" text,"BE1274" text,"BE1279" text,"BE1280" text,"BE1281" text,"BE1282" text,"BE1351" text,"BE1400" text,"BE1401" text,"BE1404" text,"BE141" text,"BE142" text,"BE193" text,"BE194" text,"BE2125" text,"BE2126" text,"BE2127" text,"BE2128" text,"BE3001" text,"BE3002" text,"BE3005" text,"BE3006" text,"BE3009" text,"BE3010" text,"BE3031" text,"BE3032" text,"BE3121" text,"BE3122" text,"BE3123" text,"BE3124" text,"BE3127" text,"BE3128" text,"BE3131" text,"BE3132" text,"BE3203" text,"BE3204" text,"BE325" text,"BE3253" text,"BE3254" text,"BE326" text,"BE332" text,"BE3503" text,"BE3504" text,"BE355" text,"BE356" text,"BE365" text,"BE366" text,"BE381" text,"BE382" text,"BE383" text,"BE384" text,"BE400" text,"BE401" text,"BE402" text,"BE403" text,"BE405" text,"BE406" text,"BE408" text,"BE409" text,"BE411" text,"BE412" text,"BE4311" text,"BE4316" text,"BE4401" text,"BE4402" text,"BE4521" text,"BE4522" text,"BE4551" text,"BE4552" text,"BE470" text,"BE473" text,"BE475" text,"BE481" text,"BE482" text,"BE601" text,"BE604" text,"BE609" text,"BE610" text,"BE7040" text,"BE7043" text,"BE7045" text,"BE7046" text,"BE7048" text,"BE7049" text,"BE708" text,"BE7111" text,"BE7112" text,"BE7127" text,"BE7128" text,"BE7217" text,"BE7218" text,"BE7307" text,"BE7308" text,"BE7351" text,"BE7352" text,"BE801" text,"BE802" text,"BE803" text,"BE804" text,"BE831" text,"BE832" text,"BE860" text,"BE861" text,"BE862" text,"BE863" text,"BE865" text,"BE981" text,"BE982" text 
 )) X
 LEFT JOIN productitem pi ON X.productitemid = pi.productitemid
 LEFT JOIN productcategory cat ON pi.productcategory = cat.productcategoryid

的大胆部分

productitemid int, "0007" text,"BE101" text,"BE1013" text,"BE1014" text,"BE102" text,"BE103" text,"BE1034" text,"BE104" text,"BE1040" text,"BE1043" text,"BE1044" text,"BE1045" text,"BE1046" text,"BE105" text,"BE106" text,"BE107" text,"BE108" text,"BE109" text,"BE110" text,"BE111" text,"BE112" text,"BE123" text,"BE1265" text,"BE1266" text,"BE1271" text,"BE1272" text,"BE1273" text,"BE1274" text,"BE1279" text,"BE1280" text,"BE1281" text,"BE1282" text,"BE1351" text,"BE1400" text,"BE1401" text,"BE1404" text,"BE141" text,"BE142" text,"BE193" text,"BE194" text,"BE2125" text,"BE2126" text,"BE2127" text,"BE2128" text,"BE3001" text,"BE3002" text,"BE3005" text,"BE3006" text,"BE3009" text,"BE3010" text,"BE3031" text,"BE3032" text,"BE3121" text,"BE3122" text,"BE3123" text,"BE3124" text,"BE3127" text,"BE3128" text,"BE3131" text,"BE3132" text,"BE3203" text,"BE3204" text,"BE325" text,"BE3253" text,"BE3254" text,"BE326" text,"BE332" text,"BE3503" text,"BE3504" text,"BE355" text,"BE356" text,"BE365" text,"BE366" text,"BE381" text,"BE382" text,"BE383" text,"BE384" text,"BE400" text,"BE401" text,"BE402" text,"BE403" text,"BE405" text,"BE406" text,"BE408" text,"BE409" text,"BE411" text,"BE412" text,"BE4311" text,"BE4316" text,"BE4401" text,"BE4402" text,"BE4521" text,"BE4522" text,"BE4551" text,"BE4552" text,"BE470" text,"BE473" text,"BE475" text,"BE481" text,"BE482" text,"BE601" text,"BE604" text,"BE609" text,"BE610" text,"BE7040" text,"BE7043" text,"BE7045" text,"BE7046" text,"BE7048" text,"BE7049" text,"BE708" text,"BE7111" text,"BE7112" text,"BE7127" text,"BE7128" text,"BE7217" text,"BE7218" text,"BE7307" text,"BE7308" text,"BE7351" text,"BE7352" text,"BE801" text,"BE802" text,"BE803" text,"BE804" text,"BE831" text,"BE832" text,"BE860" text,"BE861" text,"BE862" text,"BE863" text,"BE865" text,"BE981" text,"BE982" text

AND

SELECT l.locationcode FROM locationinfo l INNER JOIN invoiceinfo b ON b.location = l.locationid
 WHERE b.status !=2 AND l.locationtype = 1 AND l.status = 1 AND TO_CHAR (b.invoicedate, ''YYYY-MM-DD'')>=''2018-03-01'' AND TO_CHAR (b.invoicedate, ''YYYY-MM-DD'')&lt;=''2018-03-03'' GROUP BY l.locationcode order by l.locationcode

单独运行时，我得到295个结果是正确的。但是将它放在整个查询中会得到错误。

Answer 1

The manual:

其余的输出列必须具有 source_sql 查询结果的最后一列的类型，并且必须与其中的行完全一样多 category_sql 查询的结果。

带有动态（！）crosstab(text, text)查询作为第二个参数的

SELECT非常容易出错，因为输出列列表是静态的。您还应该动态生成输出列列表。例如：

Dynamic alternative to pivot with CASE and GROUP BY

除此之外，同一查询返回的行数不同，很可能是由于两个不同会话中的timezone设置不同。

谓词中包含TO_CHAR(b.invoicedate, 'YYYY-MM-DD')表达式。如果b.invoicedate 键入timestamptz ，则结果取决于timezone设置。考虑：

SET timezone = '+10';
SELECT TO_CHAR(timestamptz '2018-04-07 23:30+0', 'YYYY-MM-DD');

to_char
----------
2018-04-08

SET timezone = '-10';
SELECT TO_CHAR(timestamptz '2018-04-07 23:30+0', 'YYYY-MM-DD');

to_char
----------
2018-04-07

解决方案

要删除对timezone设置的依赖关系，请使用绝对值。

to_char()在这个地方首先是昂贵的并发症。删除它并调整谓词。
提供timestamptz值以匹配您的列。这也允许使用索引（如果适用）。
- Return Table Type from A function in PostgreSQL
使用时区名称（不是偏移或缩写）以避免更多误解。
- Ignoring timezones altogether in Rails and PostgreSQL
使用美元报价来清理报价混乱。
- Insert text with single quotes in PostgreSQL

我建议将其作为第二个参数：

$$
SELECT l.locationcode
FROM   locationinfo l
JOIN   invoiceinfo  b ON b.location = l.locationid
WHERE  b.status <> 2 AND l.locationtype = 1 AND l.status = 1
AND    b.invoicedate >=  timestamptz '2018-03-01 Europe/Vienna'
AND    b.invoicedate <   timestamptz '2018-03-04 Europe/Vienna'
GROUP  BY 1
ORDER  BY 1
$$

将我的示例中的Europe/Vienna替换为定义日期的时区名称请注意2018-03-04以包含您想要的所有2018-03-03。

查询返回不同的行数，导致交叉表错误

1 个答案:

解决方案