Question

执行PostgreSQL查询

从两个列表中搜索数据库中的匹配项时，出现以下错误：

    ProgrammingError: operator does not exist: character varying ~~ text[]
LINE 1: ...FROM public."Phosphosite_table" WHERE "GENE_NAME" LIKE ARRAY...
                                                             ^
HINT:  No operator matches the given name and argument type(s). You might need to add explicit type casts.

我的代码如下：

start = time.time()

input_file = "az20.tsv"

names = []
residuelist = []
kinase = []
fclist = []

with open(input_file, "r") as data:
    data = csv.reader(data, delimiter='\t')
    next(data, None)
    for row in data:
        data = row[0:6]
        if "(" in data[0]:
            name = data[0].split("(")[0]
            residue1 = data[0].split("(")[1]
            residue = residue1.split(")")[0]
            fc = data[3]
        else:
            pass
        if "_" in name: 
            name = name.split("_")[0]  
        if residue != "None":
            names.append(str(name))
            residuelist.append(str(residue))
            fclist.append(fc)

genename = names
location = residuelist

connection = pg.connect(HAHAHA)

cur = connection.cursor()

cur.execute('SELECT "KINASE_NAME" FROM public."Phosphosite_table" WHERE "GENE_NAME" LIKE %s and "RESIDUE" LIKE %s',\
            (genename, location))

query = cur.fetchall()

print query

connection.close()

end = time.time()
print str((end - start)/60) + " Minutes"

我已经做过一些研究，看来PostgreSQL没有执行任何类型转换。但是，我认为这是将字符串与字符串进行比较，在添加到列表之前我进行了更改。有人有建议吗？

康纳

Answer 1

但是，我认为这是字符串与字符串的比较

错误消息的character varying ~~ text[]部分告诉您，您正在将字符串（“字符变化”）与数组（“ text []”）进行比较。

如果要将单个值与数组的所有元素进行比较，则需要使用ANY operator：

WHERE "GENE_NAME" LIKE any(%s)

假设%s作为本地Postgres数组从您的代码中传递（这似乎是错误消息）。

PostgreSQL查询-类型转换

1 个答案: