第 14 行“)”附近有问题的语法错误：SQL 语句 - SAP Hana

Question

I am sure that you are used to this question but nonetheless I am having trouble with my SQL script. It is very frustrating.

When I execute the SQL against the SAP Hana database, I continuously receive this error:

Errors occurred while executing the SQL statement: SAP DBTech JDBC: [257]: sql syntax error: incorrect syntax near ")": line 14 col 35

Let me present the SQL concerned here:

SELECT
  BKPF.BKTXT, BKPF.MONAT, BSEG.BELNR, BSEG.BUKRS, BSEG.DMBTR, BSEG.GJAHR, BSEG.MANDT, BSEG.PRCTR, BSEG.SAKNR, CEPCT.KTEXT, CEPCT.LTEXT, SKAT.MCOD1, SKAT.TXT20, SKAT.TXT50
FROM
  SAPPR1.BSEG
  INNER JOIN SAPPR1.BKPF ON BSEG.GJAHR = BKPF.GJAHR
  INNER JOIN SAPPR1.CEPCT ON BSEG.PRCTR = CEPCT.PRCTR
  INNER JOIN (SELECT
                SAKNR, TXT20, TXT50, MCOD1
              FROM
                SAPPR1.SKAT
              WHERE
                SPRAS not LIKE  '%[a-z0-9 .]%' ) AS SKAT_SUB ON BSEG.SAKNR = SKAT_SUB.SAKNR
WHERE
  BKPF.MONAT = (SELECT Month('?')-1)
  AND (BSEG.GJAHR = (SELECT Year('?')-1 HAVING Month('?')-1 < 4) OR BSEG.GJAHR = (SELECT Year('?') HAVING Month('?')-1 > 3))
  AND BSEG.MANDT = ?
;

Answer 1

Unlike other DBMS HANA does not support selecting records out of nothing. A SELECT without a FROM is not valid.

In order to create a single-row set one can use the DUMMY table.

SELECT current_date FROM DUMMY;

creates the single-row set with the result of the function expression.

Having said that, for comparisons a set is not required. Instead the function can be directly put into the expression:

WHERE
  BKPF.MONAT = (MONTH(?)-1) 

Also note that for string typed bind variables no quotation marks are required or allowed.