这类似于物化视图的列数据类型? https://stackoverflow.com/questions/31119260/column-data-types-for-materialized-views但我需要更多数据(不仅仅是数据类型)。我希望对表/视图进行相同类型的查询,但对物化视图进行查询。
SELECT column_name, data_type, character_maximum_length,
character_octet_length, numeric_precision, numeric_precision_radix,
numeric_scale, datetime_precision, interval_type, interval_precision
FROM information_schema.columns
WHERE table_schema = '{}'
AND table_name = '{}'
order by ordinal_position
有人有这样的事情吗? pg_attribute 中的列名非常神秘。
运行时可以轻松检索此类问题的查询psql
与-E
(“回显隐藏查询”)选项。
以下查询应该执行您想要的操作:
SELECT a.attname,
pg_catalog.format_type(a.atttypid, a.atttypmod),
a.attnotnull
FROM pg_attribute a
JOIN pg_class t on a.attrelid = t.oid
JOIN pg_namespace s on t.relnamespace = s.oid
WHERE a.attnum > 0
AND NOT a.attisdropped
AND t.relname = 'mv_name' --<< replace with the name of the MV
AND s.nspname = 'public' --<< change to the schema your MV is in
ORDER BY a.attnum;
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