create UNIQUE INDEX uniq_index_piwik_log_action_idaction on piwik_log_action(idaction); 这样做的好处: 1. primary的index不能方便的reindex 2. postgres里面的index容易膨胀
Postgres on Neon autoscales. Get the free plan here. Summary: in this tutorial, you will learn about PostgreSQL UNIQUE constraint to make sure that values stored in a column or a group of columns are unique across rows in a table. Introduction to PostgreSQL UNIQUE constraint Sometimes, you ...
ClickSave. An error message box with the following text should appear: ERROR:syntax error at or near at "INDEX" LINE line_of_error:UNIQUE INDEX "your_index_name"("your_column_name") Current behavior The following error is displayed on screen. And the resulting SQL code is (in my example...
sslmode=disable"db,err:=gorm.Open(postgres.Open(dsn),&gorm.Config{})iferr!=nil{log.Fatal("failed to connect database") }// Migrate the schemadb.AutoMigrate(&User{}) } This creates two indexes in the PostgreSQL database:idx_users_nameand the index I wanted to createuni_name_index_gor...
For me that didn't work - because of the broken index, there were duplicate keys in the table. A SELECT did not find all the duplicate keys. First I had to do: VACUUM FULL table_name Then find duplicate rows, delete them, and rebuild the indices. It may be convenient to you to ...
A recent outage lead me to investigate Postgres unique constraints more deeply. Postgres implements unique constraints by creating a unique index – an index that can only contain unique values.[4] It turns out that unique indices and concurrent... | Rus
For now, username is always unique and always required (required by identity not the user), but not the case for the email, it can be null as expected but not unique, I added this line in the startup.cs for the uniqueness:复制 ...
Check that async operation has been scheduled in the postgres_async_indexes table Rollback the migration and check that the async operation is no long scheduled Run the migration again and execute the async operation (bundle exec rails gitlab:db:execute_async_index_operations:all) Check that the...
We need this unique index to make sure we don't have duplicate records in the merge_requests_closing_issues table. This will be necessary to upsert the new records coming from system notes during the table's backfill. We'll require a backgorund migration to make sure we don't have ...
Bug #68021 Unexplainable InnoDB unique index locks on DELETE + INSERT with same values Submitted: 3 Jan 2013 16:49Modified: 28 Sep 2014 10:48 Reporter: Ovais Tariq Email Updates: Status: Closed Impact on me: None Category: MySQL Server: InnoDB storage engineSeverity: S2 (Serious) ...