insert-multi! (clj)

Syntactic sugar over `execute!` or `execute-batch!` to make inserting columns/rows easier. Given a connectable object, a table name, a sequence of column names, and a vector of rows of data (vectors of column values), inserts the data as multiple rows in the database and attempts to return a vector of maps of generated keys. Given a connectable object, a table name, a sequence of hash maps of data, which all have the same set of keys, inserts the data as multiple rows in the database and attempts to return a vector of maps of generated keys. If called with `:batch` true will call `execute-batch!` - see its documentation for situations in which the generated keys may or may not be returned as well as additional options that can be passed. Note: without `:batch` this expands to a single SQL statement with placeholders for every value being inserted -- for large sets of rows, this may exceed the limits on SQL string size and/or number of parameters for your JDBC driver or your database!