Database functions

Database functions are used to perform database-related tasks, such as creating new tables, reading data from existing tables, or updating table records. For an introduction to creating database schemas and tables and using database functions, see Database model.

Function	Description
create‑table	Create a table identified by the specified table name.
describe‑keyset	Retrieve metadata for a specified keyset.
describe‑module	Retrieve metadata for a specified module.
describe‑table	Retrieve metadata for a specified table.
fold-db	Select rows from a specified table and iterate over them using a specified consumer function.
insert	Write a new entry in a specified table for a given key of object data.
list-modules	List all of the modules deployed on a particular chain.
read	Retrieve a row from a specified table by its key row.
select	Retrieve full rows or specified columns from a table.
update	Update the specified {column:value} object in the specified table for a given key row
with-default-read	Read columns from a default object with matching key names if the specified key row isn't found.
with-read	Read a row from a specified table for a given key row and bind column names to variables.
write	Write the specified {column:value} object in the specified table for a given key row.