Deletes all parameters previously set.
Returns the value of a parameter.
Initialize EuSQL parameters and store as Matheval variables.
sql must be a string. This function will return a 'compiled' query, which can be passed to run_query. If there is an error, parse_sql will return an atom. If a query will be run multiple times (perhaps using different parameters each time), it is faster to parse the statement once, and use run_query() than to use run_sql() each time.
query must be compiled SQL returned from parse_sql(). This function returns a 3 element sequence:
sql must be a SQL statement in a string. This function calls parse_sql and run_query for you, returning the result. If there is an error in the statement, an atom will be returned, otherwise, the result is a three element sequence:
Sets the value of a parameter to be used by a query. Parameters must be enclosed in square brackets ( [param1] ) when declared in a SQL statement, but the brackets must be omitted when calling set_parameter.