Metaprogramming

eval	Evaluate the given metacode.
sql	Create a SQL statement dynamically.
sqlCol	Generate metacode for selecting one or multiple columns with or without calculations.
sqlColAlias	Use metacode and an optional alias name to define a column.
sqlDelete	Dynamically generate a metacode of the SQL delete statement.
sqlUpdate	Dynamically generate a metacode of the SQL update statement.
expr	Generate metacode from args.
parseExpr	Convert string into metacode, which can be executed by function eval.
binaryExpr	Connect X and Y with the binary operator specified in optr to generate metacode of a binary expression.
unifiedExpr	Connect the operands in objs with the binary operators in optrs to generate metacode of a multivariate expression.
funcByName	Dynamically execute an operator or a function.
makeCall	Call a function with the specified parameters to generate a piece of script.
makeUnifiedCall	Generate metacode for function call.