我是 PostgreSQL 的新手。 当我在主机上应用迁移时,我看到一个错误:
SQLSTATE[42883]: Undefined function: 7 ERROR: function array_agg(name) does not exist LINE 12: array_to_string((select array_agg(enumlabel) from pg_enum...
我的主机有 PostgreSQL 8.3.11。
正在执行的SQL:
SELECT
d.nspname AS table_schema,
c.relname AS table_name,
a.attname AS column_name,
t.typname AS data_type,
a.attlen AS character_maximum_length,
pg_catalog.col_description(c.oid, a.attnum) AS column_comment,
a.atttypmod AS modifier,
a.attnotnull = false AS is_nullable,
CAST(pg_get_expr(ad.adbin, ad.adrelid) AS varchar) AS column_default,
coalesce(pg_get_expr(ad.adbin, ad.adrelid) ~ 'nextval',false) AS is_autoinc,
<b>array_to_string((select array_agg(enumlabel)
from pg_enum
where enumtypid=a.atttypid)::varchar[],',') as enum_values,</b>
CASE atttypid
WHEN 21 /*int2*/ THEN 16
WHEN 23 /*int4*/ THEN 32
WHEN 20 /*int8*/ THEN 64
WHEN 1700 /*numeric*/ THEN
CASE WHEN atttypmod = -1
THEN null
ELSE ((atttypmod - 4) >> 16) & 65535
END
WHEN 700 /*float4*/ THEN 24 /*FLT_MANT_DIG*/
WHEN 701 /*float8*/ THEN 53 /*DBL_MANT_DIG*/
ELSE null
END AS numeric_precision,
CASE
WHEN atttypid IN (21, 23, 20) THEN 0
WHEN atttypid IN (1700) THEN
CASE
WHEN atttypmod = -1 THEN null
ELSE (atttypmod - 4) & 65535
END
ELSE null
END AS numeric_scale,
CAST(information_schema._pg_char_max_length(information_schema._pg_truetypid(a, t),
information_schema._pg_truetypmod(a, t)) AS numeric) AS size,
a.attnum = any (ct.conkey) as is_pkey
FROM
pg_class c
LEFT JOIN pg_attribute a ON a.attrelid = c.oid
LEFT JOIN pg_attrdef ad ON a.attrelid = ad.adrelid AND a.attnum = ad.adnum
LEFT JOIN pg_type t ON a.atttypid = t.oid
LEFT JOIN pg_namespace d ON d.oid = c.relnamespace
LEFT join pg_constraint ct on ct.conrelid=c.oid and ct.contype='p'
WHERE
a.attnum > 0 and t.typname != ''
and c.relname = 'migration'
and d.nspname = 'public'
ORDER BY
a.attnum;
在 .../vendor/yiisoft/yii2/db/Schema.php:628
最佳答案
Like commented ,您最好的选择是更新到当前版本的 Postgres。 Postgres 8.3 中没有 array_agg()
函数。
但是,您可以用基本的 ARRAY
constructor 代替,它至少从 Postgres 7.4 开始就存在,并且碰巧无论如何都更有效率,即使在当前的 Postgres 中也是如此。将问题中查询的粗体部分替换为:
array_to_string(ARRAY(
SELECT enumlabel FROM pg_enum
WHERE enumtypid = a.atttypid)::text[], ',') AS enum_values,
在 Postgres 9.0 或更高版本中,您可以使用 string_agg()
进行简化:
(SELECT string_agg(enumlabel, ',') FROM pg_enum
WHERE enumtypid = a.atttypid) AS enum_values,
不过,简单的 ARRAY 构造函数应该仍然更快。
顺便说一句,pg_enum
本身是在 Postgres 8.3 中引入的(用于 enum
类型)。
关于php - PostgreSQL: 未定义函数 array_agg(enumlabel),我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/33269612/