SET tmp_loc=INTERVAL(CONV(HEX(tmp_char),16,10),0xB0A1,0xB0C5,0xB2C1,0xB4EE,0xB6EA,0xB7A2,0xB8C1,0xB9FE,0xBBF7,0xBFA6,0xC0AC ,0xC2E8,0xC4C3,0xC5B6,0xC5BE,0xC6DA,0xC8BB,0xC8F6,0xCBFA,0xCDDA ,0xCEF4,0xD1B9,0xD4D1); IF (LENGTH(tmp_char)>1 AND tmp_loc>0 AND tmp_loc<24) THEN SELECT ELT(tmp_loc,'A','B','C','D','E','F','G','H','J','K','L','M','N','O','P','Q','R','S','T','W','X','Y','Z') INTO tmp_cc; END IF; IF ASCII(tmp_cc)>64 AND ASCII(tmp_cc) <91 THEN SET tmp_rs = CONCAT(tmp_rs,tmp_cc); END IF;如何转换为postgresql的sql语句。

以下是将给定的 SQL 代码转换为 PostgreSQL 的 SQL 语句的示例：

DECLARE
    tmp_loc integer;
    tmp_cc character;
    tmp_rs character varying;
BEGIN
    tmp_loc := CONV(HEX(tmp_char), 16, 10);
    
    IF LENGTH(tmp_char) > 1 AND tmp_loc > 0 AND tmp_loc < 24 THEN
        SELECT ELT(tmp_loc, 'A','B','C','D','E','F','G','H','J','K','L','M','N','O','P','Q','R','S','T','W','X','Y','Z') INTO tmp_cc; 
    END IF;
    
    IF ASCII(tmp_cc) > 64 AND ASCII(tmp_cc) < 91 THEN
        tmp_rs := CONCAT(tmp_rs, tmp_cc);
    END IF;
    
    -- 继续处理其他逻辑...
    
END;

请注意，我已将代码放在一个 PL/pgSQL 块中，并使用 `DECLARE` 声明了变量 `tmp_loc`、`tmp_cc` 和 `tmp_rs`。你可以在此基础上继续添加其他逻辑和语句。