GaussDB(DWS)运维 -- SQL操作 -- 查找所有包含主键&唯一索引的表信息

SELECT
    n.nspname AS schemaname, --schema名称
    c1.relname AS tablename, -- 表名
    c2.relname AS indexname, -- 索引名称
    s.conname AS conname,    -- 约束名称
    pg_get_constraintdef(s.oid) AS constraintdef, -- 如果是约束，输出约束定义
    CASE WHEN s.conname IS NULL THEN pg_get_indexdef(x.indexrelid) END AS indexdef -- 如果不是约束，输出索引定义
FROM pg_index x
INNER JOIN pg_class c1 ON c1.oid = x.indrelid
INNER JOIN pg_class c2 ON c2.oid = x.indexrelid
INNER JOIN pg_namespace n ON n.oid = c1.relnamespace
LEFT JOIN pg_constraint s ON s.conrelid = x.indrelid AND s.conindid = x.indexrelid
WHERE (x.indisprimary = true OR x.indisunique = true)
AND c1.relkind = 'r' 
AND x.indrelid >= 16384 AND x.indexrelid > 16384
AND (c1.reloptions IS NULL OR c1.reloptions::text not like '%internal_mask%')  -- 排除内置对象
ORDER BY schemaname, tablename, indexname
;