tips3:在string_to_array中,如果空值串参数被忽略或者为 NULL,输入中的子串不会被替换成 NULL。
//但是我有需要把他们拆分成一个数组进行处理,可以通过 string_to_array函数 select string_to_array(code,’,’) from ods.my_table t where id=374; 结果集为:{1,2,3} 1. 2. 3. 4. 5. 6. 7. 8. 结论 第一个参数为需要转换的字符串 第二个参数为字符串中每个数组的值的分隔符 ANY运算符 ...
pgsql string_to_array函数 作⽤：将输⼊的字符串转换为array形式，例如输⼊为‘你好,hello'，使⽤该函数输出为{’你好','hello'} ⽤法：官⽹截图 只提供定界符 即提供定界符，⼜提供可选的空串，可选的串的作⽤是将字符串根据定界符分割开后的值是该可选的串时，变为null,例如下⾯的例...
方法二:array_to_string(ARRAY_AGG() ,':') 例:select array_to_string(ARRAY_AGG(NAME) ,':') from sql_user_test GROUP BY age; 1. 方法三:自定义group_count()函数,不推荐使用,效率没有string_agg()高 CREATE AGGREGATE GROUP_CONCAT(anyelement) ( sfunc=array_append, stype=anyarray, initcon...
由于参数是通过全局静态数组ConfigureNamesBool、ConfigureNamesInt、ConfigureNamesReal、ConfigureNamesString、ConfigureNamesEnum存储的,因此在build_guc_variables函数中只需要遍历相应的数组,统计参数的个数并将参数结构体中config_generic域的参数vartyoe设置为相应的参数类型。当遍历完所有参数后,根据总的参数个数分配...
inet pgrx::Inet(String) -- TODO: needs better support numeric pgrx::Numeric<P, S> or pgrx::AnyNumeric void () ARRAY[]::<type> Vec<Option<T>> or pgrx::Array<T> (zero-copy) int4range pgrx::Range<i32> int8range pgrx::Range numrange pgrx::Range<Numeric<P, S>> or pgrx...
# optional, additional extensions to be installed: array of `{name[,schema]}` - { name: postgis , schema: public } - { name: timescaledb } comment: pigsty meta database # optional, comment string for this database owner: postgres ...
It is really easy to use and doesn't require any Oracle database knowledge other than providing the parameters needed to connect to the Oracle database. FEATURES Ora2Pg consist of a Perl script (ora2pg) and a Perl module (Ora2Pg.pm), the only thing you have to modify is the ...
$name string The name of the behavior. $behavior string|array|yii\base\Behavior The behavior configuration. This can be one of the following: a yii\base\Behavior object a string specifying the behavior class an object configuration array that will be passed to Yii::createObject() to create th...
StringInfoData buffer; initStringInfo(&buffer); appendStringInfo(&buffer, "select sum(pg_database_size('%s'))::int8 from gp_dist_random('gp_id');", NameStr(*dbName)); size += get_size_from_segDBs(buffer.data); } PG_RETURN_INT64(size); ...