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# frozen-string-literal: true
#
# The dataset_run extension is designed for cases where you want
# to use dataset methods to build a query, but want to run that
# query without returning a result. The most common need would
# be to easily use placeholders in an SQL string, which Database#run
# does not support directly.
#
# You can load this extension into specific datasets:
#
# ds = DB["GRANT SELECT ON ? TO ?", :table, :user]
# ds = ds.extension(:dataset_run)
# ds.run
#
# Or you can load it into all of a database's datasets, which
# is probably the desired behavior if you are using this extension:
#
# DB.extension(:dataset_run)
# DB["GRANT SELECT ON ? TO ?", :table, :user].run
#
# Related module: Sequel::DatasetRun
#
module Sequel
module DatasetRun
# Run the dataset's SQL on the database. Returns NULL. This is
# useful when you want to run SQL without returning a result.
#
# DB["GRANT SELECT ON ? TO ?", :table, :user].run
# # GRANT SELECT ON "table" TO "user"
def run
if server = @opts[:server]
db.run(sql, :server=>server)
else
db.run(sql)
end
end
end
Dataset.register_extension(:dataset_run, DatasetRun)
end
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