Documentation

Substitutes variables in mustache template. Supports Haskell function interpolation in form of mustache lambdas.

For example, following mustache template:

select {{#selExp}}[nonAlias $ varString ("column_" ++ show n) | n <- [1..3]]{{/selExp}} from dual

will be converted to

select "column_1", "column_2", "column_3" from dual

when using Postgres, but to

select column_1, column_2, column_3 from dual

when using BigQuery as a backend.

Full list of supported lambdas:

• sExp - generates SExp - almost any term in SQL syntax is SExp
• selExp - generates [Alias SExp] - represends one or many select clauses
• fromExp - generates From - represents a relation with attached "from" keyword
• relAsExp - generates Relation - represents a relation without an alias
• relExp - generates Alias Relation - represents a relation with its alias
• queryExp - generates Query - full SQL query
• strExp - generates String - will be inserted as is

Substitutes variables in mustache template. Does not supports Haskell function interpolation.

Creates an instance of the Haskell interpreter to use for Mustache templating purposes.