metabase.mbql.schema.helpers — metabase/mbql 1.0.3

clause clj

(clause clause-name & arg-schemas)

Impl of defclause macro.

defclause clj macro

(defclause clause-name & arg-names-and-schemas)

Define a new MBQL clause.

(defclause field-id, id su/IntGreaterThanZero)

The first arg is the name of the clause, and should be followed by pairs of arg name, arg schema. Arg schemas may optionally be wrapped in optional or rest to signify that the arg is optional, or to accept varargs:

(defclause count, field (optional Field)) (defclause and, filters (rest Filter))

Since there are some cases where clauses should be parsed differently in MBQL (such as expressions in the expressions clause vs in aggregations), you can give the actual symbol produced by this macro a different name as follows:

(defclause [ag:+ +] ...) ; define symbol ag:+ to be used for a [:+ ...] clause

is-clause? clj

(is-clause? k-or-ks x)

If x an MBQL clause, and an instance of clauses defined by keyword(s) k-or-ks?

(is-clause? :count [:count 10]) ; -> true (is-clause? #{:+ :- :* :/} [:+ 10 20]) ; -> true

one-of clj macro

(one-of & clauses)

Define a schema that accepts one of several different MBQL clauses.

(one-of field-id field-literal)

one-of* clj

(one-of* & clause-names+schemas)

Interal impl of one-of macro.