Perform a multi-row INSERT in one statement in an implicit transaction.ĭo not use large batches of 100,000 rows or more, which can lead to long-running transactions that result in transaction retry errors.In traditional SQL databases, you would do this using INSERT with SELECT, which is less performant. See Insert and Return Values for details. When generating and retrieving unique IDs, use the RETURNING clause with INSERT. In this case, be sure to use the UPSERT statement.įor tables with secondary indexes, there is no performance difference between UPSERT and INSERT ON CONFLICT. You are using a simple SQL table of two columns to simulate direct KV access. Performs a read to determine the necessary writes, the UPSERT statement writes Indexes, Cockroach Labs recommends using an UPSERT statement instead of theĮquivalent INSERT ON CONFLICT statement. When inserting or updating all columns of a table, and the table has no secondary Using ON CONFLICT is therefore more flexible. The unique constraint it always uses the column(s) from the primary However, UPSERT does not let you specify the column(s) with UPSERTĪs a short-hand alternative to the ON CONFLICT clause, you can use the UPSERT Rather than inferring one using a column list, which is the default behavior. ON CONSTRAINT allows you to explicitly specify an index or unique constraint for INSERT ON CONFLICT, If the values in the SET expression cause uniqueness conflicts, Update Values ON CONFLICT and Do Not Update Values ON CONFLICT examples. New rows to be inserted, set ON CONFLICT to DO NOTHING. To prevent the affected rows from updating while allowing Statement is also supported here, including those with WHEREĬlauses). (any SET expression supported by the UPDATE To update the affected rows instead, use an ON CONFLICTĬlause containing the column(s) with the unique constraintĪnd the DO UPDATE SET expression set to the column(s) to be updated Normally, when inserted values conflict with a UNIQUE constraint on one or more columns, CockroachDB ON CONFLICT DO NOTHING ( name, ) ON CONSTRAINT constraint_name DO NOTHING UPDATE SET column_name = a_expr ( column_name, ) = ( select_stmt a_expr, a_expr, ) , See the Insert and Return Values example below. Return values based on rows inserted, where target_list can be specific column names from the table, * for all columns, or computations using scalar expressions. See the Insert Default Values examples below. To fill a specific column with its default value, leave the value out of the select_stmt or use DEFAULT at the appropriate position. To fill all columns with their default values, use DEFAULT VALUES in place of select_stmt. Also, if column names are listed after INTO, values must be in corresponding order otherwise, they must follow the declared order of the columns in the table. Each value must match the data type of its column. The name of a column to populate during the insert.Ī selection query. When you provide an alias, it completely hides the actual table name. WITH RECURSIVE common_table_expr, INSERT INTO table_name AS table_alias_name ( column_name, ) select_stmt DEFAULT VALUES on_conflict RETURNING target_elem, NOTHING Parameters ParameterĪn alias for the table name.
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