FROM sys_user AS s WHERE s."Account" = ANY (@__accounts_0) OR (((s."Account" IS NULL)) AND ((array_position(@__accounts_0, NULL) IS NOT NULL))) 然后执行报错:Npgsql.PostgresException (0x80004005): 42883: function array_position(character varying[], unknown) does not exist...
在PostgreSQL中,array_position函数用于在指定的数组中查找指定元素的位置,并返回该元素第一次出现的下标。下面我将根据提供的tips逐一回答你的问题: 解释array_position函数在PostgreSQL中的用途: array_position函数的主要用途是在一维数组中查找特定元素的位置。它返回该元素在数组中的下标(从1开始计数),如果元素在数...
在array_position和array_positions中, 每个数组元素与使用IS NOT DISTINCT FROM语法的搜索值进行比较。 在array_position中,如果没有找到该值,则返回NULL。 在array_positions中,如果数组是NULL,则返回NULL; 如果数组中没有找到该值,相反返回空数组。 在string_to_array中,如果定界符参数为 NULL,输入字符串中的每一...
We can clearly see that the element'Sarah' is located at the 2nd position first in the array. Note that the element is again repeated at position 6 but is not returned by the query because array_position() returns the index number where that element occurred first. Now we will intent...
array_prepend、array_append、array_cat用于元素的头尾插入或数组的连接,前两者只能用于一维数组,一般我们可以使用连接符 || 来提供这三者的功能。 数组检索相关:any、all、generate_subscripts、array_position、array_positions、&&(左操作数是否包含右操作数)。关于数组检索,官方文档有这么段提示:数组不是集合,搜索数...
问PostgreSQL -按array_position排序，并在另一列上区分EN看一个题： 查找和排序 题目：输入任意（用户...
postgres=# select * from t1; ERROR: relation "t1" does not exist LINE 1: select * from t1; ^ postgres=# select * from tbase_schema.t1; id | mc ---+--- (0 rows) 上面出错就是因为模式tbase_schema没有配置在search_path搜索路径中。 3.4.3 创建和管理表 3.4.3.1 创建表 使用命令create...
> {error, #error{severity = error,code = <<"42P01">>, codename = undefined_table, message = <<"relation \"_nowhere_\" does not exist">>, extra = [{file,<<"parse_relation.c">>}, {line,<<"1160">>}, {position,<<"15">>}, {routine,<<"parserOpenTable">>}]}}...
Command does not block, just initiates the action. Parameters: subscription_name - name of the subscription, must be unique provider_dsn - connection string to a provider replication_sets - array of replication sets to subscribe to, these must already exist, default is "{default,default_insert_...
The cursor position row moved to the bottom line after saved the procedure/function. "XXX is not a valid value" error occurred when editing a PostgreSQL model table in some cases. Transaction did not end after closing the table in some cases. To upgrade, please visit our Customer Center. ...