package sqlgg
SQL Guided (code) Generator
Install
Dune Dependency
Authors
Maintainers
Sources
sqlgg-20231201.tar.gz
md5=0841965b140612b9b1fb066cc21f88cb
sha256=7fbee5972b8fa0488bf31bb482101c93c328f67ceef3e95af165d554736d78fe
sha512=5d14e03e02f62c72c57cc574fd9f637e99118556a739af16d71e8813a8cbd8c330e48d69b9577ef2e9d0227aee9d85664cb4907f479927b7431e0475d954fa1a
doc/src/sqlgg.lib/sql.ml.html
Source file sql.ml
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434
(** *) open Printf open ExtLib open Prelude module Type = struct type t = | Unit of [`Interval] | Int | Text | Blob | Float | Bool | Datetime | Decimal | Any [@@deriving show {with_path=false}] let to_string = show let matches x y = match x,y with | Any, _ | _, Any -> true | _ -> x = y let is_unit = function Unit _ -> true | _ -> false let order x y = if x = y then `Equal else match x,y with | Any, t | t, Any -> `Order (t,Any) | Int, Float | Float, Int -> `Order (Int,Float) (* arbitrary decision : allow int<->decimal but require explicit cast for floats *) | Decimal, Int | Int, Decimal -> `Order (Int,Decimal) | Text, Blob | Blob, Text -> `Order (Text,Blob) | Int, Datetime | Datetime, Int -> `Order (Int,Datetime) | Text, Datetime | Datetime, Text -> `Order (Datetime,Text) | _ -> `No let common_type f x y = match order x y with | `Equal -> Some x | `Order p -> Some (f p) | `No -> None let common_supertype = common_type snd let common_subtype = common_type fst let common_type x y = Option.is_some @@ common_subtype x y type tyvar = Typ of t | Var of int let string_of_tyvar = function Typ t -> to_string t | Var i -> sprintf "'%c" (Char.chr @@ Char.code 'a' + i) type func = | Group of t (* _ -> t *) | Agg (* 'a -> 'a *) | Multi of tyvar * tyvar (* 'a -> ... -> 'a -> 'b *) | Ret of t (* _ -> t *) (* TODO eliminate *) | F of tyvar * tyvar list let monomorphic ret args = F (Typ ret, List.map (fun t -> Typ t) args) let fixed = monomorphic let identity = F (Var 0, [Var 0]) let pp_func pp = let open Format in function | Agg -> fprintf pp "|'a| -> 'a" | Group ret -> fprintf pp "|_| -> %s" (to_string ret) | Ret ret -> fprintf pp "_ -> %s" (to_string ret) | F (ret, args) -> fprintf pp "%s -> %s" (String.concat " -> " @@ List.map string_of_tyvar args) (string_of_tyvar ret) | Multi (ret, each_arg) -> fprintf pp "{ %s }+ -> %s" (string_of_tyvar each_arg) (string_of_tyvar ret) let string_of_func = Format.asprintf "%a" pp_func let is_grouping = function | Group _ | Agg -> true | Ret _ | F _ | Multi _ -> false end module Constraint = struct type conflict_algo = | Ignore | Replace | Abort | Fail | Rollback [@@deriving show{with_path=false}, ord] type t = | PrimaryKey | NotNull | Null | Unique | Autoincrement | OnConflict of conflict_algo [@@deriving show{with_path=false}, ord] end module Constraints = struct include Set.Make(Constraint) let show s = [%derive.show: Constraint.t list] (elements s) let pp fmt s = Format.fprintf fmt "%s" (show s) end type attr = {name : string; domain : Type.t; extra : Constraints.t; } [@@deriving show {with_path=false}] let make_attribute name domain extra = if Constraints.mem Null extra && Constraints.mem NotNull extra then fail "Column %s can be either NULL or NOT NULL, but not both" name; {name;domain;extra} module Schema = struct type t = attr list [@@deriving show] exception Error of t * string (** FIXME attribute case sensitivity? *) let by_name name = function attr -> attr.name = name let find_by_name t name = List.find_all (by_name name) t let find t name = match find_by_name t name with | [x] -> x | [] -> raise (Error (t,"missing attribute : " ^ name)) | _ -> raise (Error (t,"duplicate attribute : " ^ name)) let make_unique = List.unique ~cmp:(fun a1 a2 -> a1.name = a2.name && a1.name <> "") let is_unique t = List.length (make_unique t) = List.length t let check_unique t = is_unique t || raise (Error (t,"duplicate attributes")) let project names t = List.map (find t) names let change_inplace t before after = ignore (find t before); List.map (fun attr -> match by_name before attr with | true -> after | false -> attr ) t let exists t name = match (find t name : attr) with | _ -> true | exception _ -> false let rename t oldname newname = if not (exists t oldname) then raise @@ Error (t, "no such column : " ^ oldname); if exists t newname then raise @@ Error (t, "column already exists : " ^ newname); List.map (fun attr -> if attr.name = oldname then { attr with name = newname } else attr) t let cross t1 t2 = t1 @ t2 (** [contains t attr] tests whether schema [t] contains attribute [attr] *) let contains t attr = find t attr.name = attr let check_contains t attr = if not (contains t attr) then raise (Error (t,"type mismatch for attribute " ^ attr.name)) let sub l a = List.filter (fun x -> not (List.mem x a)) l let to_string v = v |> List.map (fun attr -> sprintf "%s %s" (Type.to_string attr.domain) attr.name) |> String.concat ", " |> sprintf "[%s]" let names t = t |> List.map (fun attr -> attr.name) |> String.concat "," |> sprintf "[%s]" let natural_ t1 t2 = let (common,t1only) = List.partition (fun x -> List.mem x t2) t1 in if 0 = List.length common then failwith "natural'"; let t2only = sub t2 common in common @ t1only @ t2only let natural t1 t2 = try natural_ t1 t2 with | _ -> raise (Error (t1,"no common attributes for natural join of " ^ (names t1) ^ " and " ^ (names t2))) let join_using l t1 t2 = let common = List.map (find t1) l in List.iter (check_contains t2) common; common @ sub t1 common @ sub t2 common let check_types t1 t2 = List.iter2 (fun a1 a2 -> match a1.domain, a2.domain with | Type.Any, _ | _, Type.Any -> () | x, y when x = y -> () | _ -> raise (Error (t1, sprintf "Atributes do not match : %s of type %s and %s of type %s" a1.name (Type.to_string a1.domain) a2.name (Type.to_string a2.domain)))) t1 t2 let check_types t1 t2 = try check_types t1 t2 with | List.Different_list_size _ -> raise (Error (t1, (to_string t1) ^ " differs in size to " ^ (to_string t2))) let compound t1 t2 = check_types t1 t2; t1 let add t col pos = match find_by_name t col.name with | [] -> begin match pos with | `First -> col::t | `Default -> t @ [col] | `After name -> try let (i,_) = List.findi (fun _ attr -> by_name name attr) t in let (l1,l2) = List.split_nth (i+1) t in l1 @ (col :: l2) with Not_found -> raise (Error (t,"Can't insert column " ^ col.name ^ " after non-existing column " ^ name)) end | _ -> raise (Error (t,"Already has column " ^ col.name)) let drop t col = ignore (find t col); List.remove_if (by_name col) t let change t oldcol col pos = match pos with | `Default -> change_inplace t oldcol col | `First | `After _ -> add (drop t oldcol) col pos let to_string = show let print x = prerr_endline (to_string x) end type table_name = { db : string option; tn : string } [@@deriving show] let show_table_name { db; tn } = match db with Some db -> sprintf "%s.%s" db tn | None -> tn let make_table_name ?db tn = { db; tn } type schema = Schema.t [@@deriving show] type table = table_name * schema [@@deriving show] let print_table out (name,schema) = IO.write_line out (show_table_name name); schema |> List.iter begin fun {name;domain;extra} -> IO.printf out "%10s %s %s\n" (Type.to_string domain) name (Constraints.show extra) end; IO.write_line out "" (** optional name and start/end position in string *) type param_id = { label : string option; pos : int * int; } [@@deriving show] type param = { id : param_id; typ : Type.t; attr : attr option; } [@@deriving show] let new_param ?attr id typ = { id; typ; attr } type params = param list [@@deriving show] type ctor = | Simple of param_id * var list option | Verbatim of string * string and var = | Single of param | SingleIn of param | ChoiceIn of { param: param_id; kind : [`In | `NotIn]; vars: var list } | Choice of param_id * ctor list | TupleList of param_id * schema [@@deriving show] type vars = var list [@@deriving show] type alter_pos = [ `After of string | `Default | `First ] type alter_action = [ | `Add of attr * alter_pos | `RenameTable of table_name | `RenameColumn of string * string | `RenameIndex of string * string | `Drop of string | `Change of string * attr * alter_pos | `None ] type select_result = (schema * param list) type direction = [ `Fixed | `Param of param_id ] [@@deriving show] type int_or_param = [`Const of int | `Limit of param] type limit_t = [ `Limit | `Offset ] type col_name = { cname : string; (** column name *) tname : table_name option; } and limit = param list * bool and nested = source * (source * join_cond) list and source = [ `Select of select_full | `Table of table_name | `Nested of nested ] * table_name option (* alias *) and join_cond = [ `Cross | `Search of expr | `Default | `Natural | `Using of string list ] and select = { columns : column list; from : nested option; where : expr option; group : expr list; having : expr option; } and select_full = { select : select * select list; order : order; limit : limit option; } and order = (expr * direction option) list and 'expr choices = (param_id * 'expr option) list and expr = | Value of Type.t (** literal value *) | Param of param | Inparam of param | Choices of param_id * expr choices | InChoice of param_id * [`In | `NotIn] * expr | Fun of Type.func * expr list (** parameters *) | SelectExpr of select_full * [ `AsValue | `Exists ] | Column of col_name | Inserted of string (** inserted value *) and column = | All | AllOf of table_name | Expr of expr * string option (** name *) [@@deriving show {with_path=false}] type columns = column list [@@deriving show] let expr_to_string = show_expr type assignments = (col_name * expr) list type insert_action = { target : table_name; action : [ `Set of assignments option | `Values of (string list option * [ `Expr of expr | `Default ] list list option) (* column names * list of value tuples *) | `Param of (string list option * param_id) | `Select of (string list option * select_full) ]; on_duplicate : assignments option; } type stmt = | Create of table_name * [ `Schema of schema | `Select of select_full ] | Drop of table_name | Alter of table_name * alter_action list | Rename of (table_name * table_name) list | CreateIndex of string * table_name * string list (* index name, table name, columns *) | Insert of insert_action | Delete of table_name * expr option | DeleteMulti of table_name list * nested * expr option | Set of string * expr | Update of table_name * assignments * expr option * order * param list (* where, order, limit *) | UpdateMulti of source list * assignments * expr option | Select of select_full | CreateRoutine of string * Type.t option * (string * Type.t * expr option) list (* open Schema let test = [{name="a";domain=Type.Int}; {name="b";domain=Type.Int}; {name="c";domain=Type.Text};];; let () = print test let () = print (project ["b";"c";"b"] test) let () = print (project ["b";"d"] test) let () = print (rename test "a" "new_a") *) module Function : sig val lookup : string -> int -> Type.func val add : int -> Type.func -> string -> unit val exclude : int -> string -> unit val monomorphic : Type.t -> Type.t list -> string -> unit val multi : ret:Type.tyvar -> Type.tyvar -> string -> unit val multi_polymorphic : string -> unit val sponge : Type.func end = struct let h = Hashtbl.create 10 let add_ narg typ name = let name = String.lowercase_ascii name in if Hashtbl.mem h (name,narg) then let func = match narg with None -> sprintf "%S" name | Some n -> sprintf "%S of %d arguments" name n in fail "Function %s already registered" func else Hashtbl.add h (name,narg) typ let exclude narg name = add_ (Some narg) None name let add_multi typ name = add_ None (Some typ) name let add narg typ name = add_ (Some narg) (Some typ) name let sponge = Type.(Multi (Typ Any, Typ Any)) let lookup name narg = let name = String.lowercase_ascii name in match Hashtbl.find h (name,Some narg) with | None -> eprintfn "W: wrong number of arguments for known function %S, treating as untyped" name; sponge | Some t -> t | exception _ -> match Hashtbl.find h (name,None) with | None -> assert false | Some t -> t | exception _ -> eprintfn "W: unknown function %S of %d arguments, treating as untyped" name narg; sponge let monomorphic ret args name = add (List.length args) Type.(monomorphic ret args) name let multi_polymorphic name = add_multi Type.(Multi (Var 0, Var 0)) name let multi ~ret args name = add_multi Type.(Multi (ret, args)) name end let () = let open Type in let open Function in let (||>) x f = List.iter f x in "count" |> add 0 (Group Int); (* count( * ) - asterisk is treated as no parameters in parser *) "count" |> add 1 (Group Int); "avg" |> add 1 (Group Float); ["max";"min";"sum"] ||> add 1 Agg; ["max";"min"] ||> multi_polymorphic; (* sqlite3 *) ["lower";"upper";"unhex";"md5";"sha";"sha1";"sha2"] ||> monomorphic Text [Text]; "hex" |> monomorphic Text [Int]; "length" |> monomorphic Int [Text]; ["random"] ||> monomorphic Int []; "floor" |> monomorphic Int [Float]; ["nullif";"ifnull"] ||> add 2 (F (Var 0, [Var 0; Var 0])); ["least";"greatest";"coalesce"] ||> multi_polymorphic; "strftime" |> exclude 1; (* requires at least 2 arguments *) ["concat";"concat_ws";"strftime"] ||> multi ~ret:(Typ Text) (Typ Text); "date" |> monomorphic Datetime [Datetime]; "time" |> monomorphic Text [Datetime]; "julianday" |> multi ~ret:(Typ Float) (Typ Text); "from_unixtime" |> monomorphic Datetime [Int]; "from_unixtime" |> monomorphic Text [Int;Text]; ["pow"; "power"] ||> monomorphic Float [Float;Int]; "unix_timestamp" |> monomorphic Int []; "unix_timestamp" |> monomorphic Int [Datetime]; ["timestampdiff";"timestampadd"] ||> monomorphic Int [Unit `Interval;Datetime;Datetime]; "any_value" |> add 1 (F (Var 0,[Var 0])); (* 'a -> 'a but not aggregate *) "substring" |> monomorphic Text [Text; Int]; "substring" |> monomorphic Text [Text; Int; Int]; "substring_index" |> monomorphic Text [Text; Text; Int]; "last_insert_id" |> monomorphic Int []; "last_insert_id" |> monomorphic Int [Int]; ()
sectionYPositions = computeSectionYPositions($el), 10)"
x-init="setTimeout(() => sectionYPositions = computeSectionYPositions($el), 10)"
>