X-Git-Url: http://git.kpe.io/?a=blobdiff_plain;f=interfaces%2Foracle%2Foracle-sql.cl;fp=interfaces%2Foracle%2Foracle-sql.cl;h=0000000000000000000000000000000000000000;hb=6141152b9819fc7fc9fed8eaf60d5aaa461f8463;hp=d607ff825ff6595b3039d6554f938ab752601fa5;hpb=42a951e9f7152e7c145958f4dfed41d4e865c9fd;p=clsql.git diff --git a/interfaces/oracle/oracle-sql.cl b/interfaces/oracle/oracle-sql.cl deleted file mode 100644 index d607ff8..0000000 --- a/interfaces/oracle/oracle-sql.cl +++ /dev/null @@ -1,856 +0,0 @@ -;;; -*- Mode: Lisp -*- -;;; $Id: oracle-sql.cl,v 1.2 2002/05/13 03:57:09 kevin Exp $ - -;;; MaiSQL --- Common Lisp Interface Layer to SQL Databases -;;; This is copyrighted software. See documentation for terms. -;;; -;;; oracle-sql.lisp --- SQL-Interface implementation for Oracle -;;; -;;; derived from postgresql.lisp - -(in-package :clsql-oracle) - -(defmethod database-initialize-database-type - ((database-type (eql :oracle))) - t) - -;;;; KLUDGE: The original prototype of this code was implemented using -;;;; lots of special variables holding MAKE-ALIEN values. When I was -;;;; first converting it to use WITH-ALIEN variables, I was confused -;;;; about the behavior of MAKE-ALIEN and WITH-ALIEN; I thought that -;;;; (MAKE-ALIEN TYPEFOO) returned the same type of object as is bound -;;;; to the name BAR by (WITH-ALIEN ((BAR TYPEFOO)) ..). In fact the -;;;; value returned by MAKE-ALIEN has an extra level of indirection -;;;; relative to the value bound by WITH-ALIEN, i.e. (DEREF -;;;; (MAKE-ALIEN TYPEFOO)) has the same type as the value bound to the -;;;; name BAR by (WITH-ALIEN ((BAR TYPEFOO)) ..). Laboring under my -;;;; misunderstanding, I was unable to use ordinary scalars bound by -;;;; WITH-ALIEN, and I ended up giving up and deciding to work around -;;;; this apparent bug in CMUCL by using 1-element arrays instead. -;;;; This "workaround" for my misunderstanding is obviously unnecessary -;;;; and confusing, but still remains in the code. -- WHN 20000106 - - -;;;; arbitrary parameters, tunable for performance or other reasons - -;;; the number of table rows that we buffer at once when reading a table -;;; -;;; CMUCL has a compiled-in limit on how much C data can be allocated -;;; (through malloc() and friends) at any given time, typically 8 Mb. -;;; Setting this constant to a moderate value should make it less -;;; likely that we'll have to worry about the CMUCL limit. -(defconstant +n-buf-rows+ 200) -;;; the number of characters that we allocate for an error message buffer -(defconstant +errbuf-len+ 512) - -;;; utilities for mucking around with C-level stuff - -;; Return the address of ALIEN-OBJECT (like the C operator "&"). -;; -;; The INDICES argument is useful to give the ALIEN-OBJECT the -;; expected number of zero indices, especially when we have a bunch of -;; 1-element arrays running around due to the workaround for the CMUCL -;; 18b WITH-ALIEN scalar bug. - -(defmacro c-& (alien-object &rest indices) - `(addr (deref ,alien-object ,@indices))) - -;; constants - from OCI? - -(defconstant +var-not-in-list+ 1007) -(defconstant +no-data-found+ 1403) -(defconstant +null-value-returned+ 1405) -(defconstant +field-truncated+ 1406) - -(defconstant SQLT-INT 3) -(defconstant SQLT-STR 5) -(defconstant SQLT-FLT 4) -(defconstant SQLT-DATE 12) - -;;; Note that despite the suggestive class name (and the way that the -;;; *DEFAULT-DATABASE* variable holds an object of this class), a DB -;;; object is not actually a database but is instead a connection to a -;;; database. Thus, there's no obstacle to having any number of DB -;;; objects referring to the same database. - -(defclass oracle-database (database) ; was struct db - ((envhp - :reader envhp - :initarg :envhp - :type (alien (* (* t))) - :documentation - "OCI environment handle") - (errhp - :reader errhp - :initarg :errhp - :type (alien (* (* t))) - :documentation - "OCI error handle") - (svchp - :reader svchp - :initarg :svchp - :type (alien (* (* t))) - :documentation - "OCI service context handle") - (data-source-name - :initarg :dsn - :initform nil - :documentation - "optional data source name (used only for debugging/printing)") - (user - :initarg :user - :reader user - :type string - :documentation - "the \"user\" value given when data source connection was made") - (date-format - :initarg :date-format - :reader date-format - :initform "YYYY-MM-DD HH24:MI:SS\"+00\"") - (date-format-length - :type number - :documentation - "Each database connection can be configured with its own date -output format. In order to extract date strings from output buffers -holding multiple date strings in fixed-width fields, we need to know -the length of that format."))) - - -;;; Handle the messy case of return code=+oci-error+, querying the -;;; system for subcodes and reporting them as appropriate. ERRHP and -;;; NULLS-OK are as in the OERR function. - -(defun handle-oci-error (&key database nulls-ok) - (cond (database - (with-slots (errhp) - database - (with-alien ((errbuf (array char #.+errbuf-len+)) - (errcode (array long 1))) - (setf (deref errbuf 0) 0) ; i.e. init to empty string - (setf (deref errcode 0) 0) - (oci-error-get (deref errhp) 1 "" (c-& errcode 0) (c-& errbuf 0) +errbuf-len+ +oci-htype-error+) - (let ((subcode (deref errcode 0))) - (unless (and nulls-ok (= subcode +null-value-returned+)) - (error 'clsql-sql-error - :database database - :errno subcode - :error (cast (c-& errbuf 0) c-string))))))) - (nulls-ok - (error 'clsql-sql-error - :database database - :error "can't handle NULLS-OK without ERRHP")) - (t - (error 'clsql-sql-error - :database database - :error "OCI Error (and no ERRHP available to find subcode)")))) - -;;; Require an OCI success code. -;;; -;;; (The ordinary OCI error reporting mechanisms uses a fair amount of -;;; machinery (environments and other handles). In order to get to -;;; where we can use these mechanisms, we have to be able to allocate -;;; the machinery. The functions for allocating the machinery can -;;; return errors (e.g. out of memory) but shouldn't. Wrapping this function -;;; around function calls to such have-to-succeed functions enforces -;;; this condition.) - -(defun osucc (code) - (declare (type fixnum code)) - (unless (= code +oci-success+) - (error 'dbi-error - :format-control "unexpected OCI failure, code=~S" - :format-arguments (list code)))) - - -;;; Enabling this can be handy for low-level debugging. -#+nil -(progn - (trace oci-initialize #+oci-8-1-5 oci-env-create oci-handle-alloc oci-logon - oci-error-get oci-stmt-prepare oci-stmt-execute - oci-param-get oci-logon oci-attr-get oci-define-by-pos oci-stmt-fetch) - (setf debug::*debug-print-length* nil)) - - -;;;; the OCI library, part V: converting from OCI representations to Lisp -;;;; representations - -;; Return the INDEXth string of the OCI array, represented as Lisp -;; SIMPLE-STRING. SIZE is the size of the fixed-width fields used by -;; Oracle to store strings within the array. - -;; In the wild world of databases, trailing spaces aren't generally -;; significant, since e.g. "LARRY " and "LARRY " are the same string -;; stored in different fixed-width fields. OCI drops trailing spaces -;; for us in some cases but apparently not for fields of fixed -;; character width, e.g. -;; -;; (dbi:sql "create table employees (name char(15), job char(15), city -;; char(15), rate float)" :db orcl :types :auto) -;; In order to map the "same string" property above onto Lisp equality, -;; we drop trailing spaces in all cases: - -(defun deref-oci-string (arrayptr string-index size) - (declare (type (alien (* char)) arrayptr)) - (declare (type (mod #.+n-buf-rows+) string-index)) - (declare (type (and unsigned-byte fixnum) size)) - (let* ((raw (cast (addr (deref arrayptr (* string-index size))) c-string)) - (trimmed (string-trim " " raw))) - (if (equal trimmed "NULL") nil trimmed))) - -;; the OCI library, part Z: no-longer used logic to convert from -;; Oracle's binary date representation to Common Lisp's native date -;; representation - -#+nil -(defvar +oci-date-bytes+ 7) - -;;; Return the INDEXth date in the OCI array, represented as -;;; a Common Lisp "universal time" (i.e. seconds since 1900). - -#+nil -(defun deref-oci-date (arrayptr index) - (oci-date->universal-time (addr (deref arrayptr - (* index +oci-date-bytes+))))) -#+nil -(defun oci-date->universal-time (oci-date) - (declare (type (alien (* char)) oci-date)) - (flet (;; a character from OCI-DATE, interpreted as an unsigned byte - (ub (i) - (declare (type (mod #.+oci-date-bytes+) i)) - (mod (deref oci-date i) 256))) - (let* ((century (* (- (ub 0) 100) 100)) - (year (+ century (- (ub 1) 100))) - (month (ub 2)) - (day (ub 3)) - (hour (1- (ub 4))) - (minute (1- (ub 5))) - (second (1- (ub 6)))) - (encode-universal-time second minute hour day month year)))) - -;; Return (VALUES ALL-TABLES COLUMN-NAMES), where ALL-TABLES is a -;; table containing one row for each table available in DB, and -;; COLUMN-NAMES is a list of header names for the columns in -;; ALL-TABLES. -;; -;; The Allegro version also accepted a HSTMT argument. - -;(defmethod database-list-tables ((db oracle-database)) -; (sql:query "select '',OWNER,TABLE_NAME,TABLE_TYPE,'' from all_catalog")) - - -(defmethod list-all-user-database-tables ((db oracle-database)) - (unless db - (setf db sql:*default-database*)) - (values (database-query "select TABLE_NAME from all_catalog - where owner <> 'PUBLIC' and owner <> 'SYSTEM' and owner <> 'SYS'" - db))) - - -(defmethod database-list-tables ((database oracle-database) - &key (system-tables nil)) - (if system-tables - (select [table_name] :from [all_catalog]) - (select [table_name] :from [all_catalog] - :where [and [<> [owner] "PUBLIC"] - [<> [owner] "SYSTEM"] - [<> [owner] "SYS"]] - :flatp t))) - -;; Return a list of all columns in TABLE. -;; -;; The Allegro version of this also returned a second value. - -(defmethod list-all-table-columns (table (db oracle-database)) - (declare (type string table)) - (unless db - (setf db (default-database))) - (let* ((sql-stmt (concatenate - 'simple-string - "select " - "''," - "all_tables.OWNER," - "''," - "user_tab_columns.COLUMN_NAME," - "user_tab_columns.DATA_TYPE from user_tab_columns," - "all_tables where all_tables.table_name = '" table "'" - " and user_tab_columns.table_name = '" table "'")) - (preresult (sql sql-stmt :db db :types :auto))) - ;; PRERESULT is like RESULT except that it has a name instead of - ;; type codes in the fifth column of each row. To fix this, we - ;; destructively modify PRERESULT. - (dolist (preresult-row preresult) - (setf (fifth preresult-row) - (if (find (fifth preresult-row) - #("NUMBER" "DATE") - :test #'string=) - 2 ; numeric - 1))) ; string - preresult)) - -(defmethod database-list-attributes (table (database oracle-database)) - (let* ((relname (etypecase table - (sql-sys::sql-ident - (string-upcase - (symbol-name (slot-value table 'sql-sys::name)))) - (string table)))) - (select [user_tab_columns column_name] - :from [user_tab_columns] - :where [= [user_tab_columns table_name] relname] - :flatp t))) - - - -;; Return one row of the table referred to by QC, represented as a -;; list; or if there are no more rows, signal an error if EOF-ERRORP, -;; or return EOF-VALUE otherwise. - -;; KLUDGE: This CASE statement is a strong sign that the code would be -;; cleaner if CD were made into an abstract class, we made variant -;; classes for CD-for-column-of-strings, CD-for-column-of-floats, -;; etc., and defined virtual functions to handle operations like -;; get-an-element-from-column. (For a small special purpose module -;; like this, would arguably be overkill, so I'm not going to do it -;; now, but if this code ends up getting more complicated in -;; maintenance, it would become a really good idea.) - -;; Arguably this would be a good place to signal END-OF-FILE, but -;; since the ANSI spec specifically says that END-OF-FILE means a -;; STREAM which has no more data, and QC is not a STREAM, we signal -;; DBI-ERROR instead. - -(defun fetch-row (qc &optional (eof-errorp t) eof-value) - (declare (optimize (speed 3))) - (cond ((zerop (qc-n-from-oci qc)) - (if eof-errorp - (dbi-error "no more rows available in ~S" qc) - eof-value)) - ((>= (qc-n-to-dbi qc) - (qc-n-from-oci qc)) - (refill-qc-buffers qc) - (fetch-row qc nil eof-value)) - (t - (let ((cds (qc-cds qc)) - (reversed-result nil) - (irow (qc-n-to-dbi qc))) - (dotimes (icd (length cds)) - (let* ((cd (aref cds icd)) - (b (alien-resource-buffer (cd-buffer cd))) - (value - (let ((arb (alien-resource-buffer (cd-indicators cd)))) - (declare (type (alien (* (alien:signed 16))) arb)) - (unless (= (deref arb irow) -1) - (ecase (cd-oci-data-type cd) - (#.SQLT-STR (deref-oci-string b irow (cd-sizeof cd))) - (#.SQLT-FLT (deref (the (alien (* double)) b) irow)) - (#.SQLT-INT (deref (the (alien (* int)) b) irow)) - (#.SQLT-DATE (deref-oci-string b irow (cd-sizeof cd)))))))) - (push value reversed-result))) - (incf (qc-n-to-dbi qc)) - (nreverse reversed-result))))) - -(defun refill-qc-buffers (qc) - (with-slots (errhp) - (qc-db qc) - (setf (qc-n-to-dbi qc) 0) - (cond ((qc-oci-end-seen-p qc) - (setf (qc-n-from-oci qc) 0)) - (t - (let ((oci-code (%oci-stmt-fetch (deref (qc-stmthp qc)) - (deref errhp) - +n-buf-rows+ - +oci-fetch-next+ +oci-default+))) - (ecase oci-code - (#.+oci-success+ (values)) - (#.+oci-no-data+ (setf (qc-oci-end-seen-p qc) t) - (values)) - (#.+oci-error+ (handle-oci-error :database (qc-db qc) - :nulls-ok t)))) - (with-alien ((rowcount (array unsigned-long 1))) - (oci-attr-get (deref (qc-stmthp qc)) +oci-htype-stmt+ - (c-& rowcount 0) nil +oci-attr-row-count+ - (deref errhp)) - (setf (qc-n-from-oci qc) - (- (deref rowcount 0) (qc-total-n-from-oci qc))) - (when (< (qc-n-from-oci qc) +n-buf-rows+) - (setf (qc-oci-end-seen-p qc) t)) - (setf (qc-total-n-from-oci qc) - (deref rowcount 0))))) - (values))) - -;; the guts of the SQL function -;; -;; (like the SQL function, but with the QUERY argument hardwired to T, so -;; that the return value is always a cursor instead of a list) - -;; Is this a SELECT statement? SELECT statements are handled -;; specially by OCIStmtExecute(). (Non-SELECT statements absolutely -;; require a nonzero iteration count, while the ordinary choice for a -;; SELECT statement is a zero iteration count. - -;; SELECT statements are the only statements which return tables. We -;; don't free STMTHP in this case, but instead give it to the new -;; QUERY-CURSOR, and the new QUERY-CURSOR becomes responsible for -;; freeing the STMTHP when it is no longer needed. - -(defun sql-stmt-exec (sql-stmt-string db &key types) - (with-slots (envhp svchp errhp) - db - (let ((stmthp (make-alien (* t)))) - (with-alien ((stmttype (array unsigned-short 1))) - - (oci-handle-alloc (deref envhp) (c-& stmthp) +oci-htype-stmt+ 0 nil) - (oci-stmt-prepare (deref stmthp) (deref errhp) - sql-stmt-string (length sql-stmt-string) - +oci-ntv-syntax+ +oci-default+ :database db) - (oci-attr-get (deref stmthp) +oci-htype-stmt+ - (c-& stmttype 0) nil +oci-attr-stmt-type+ - (deref errhp) :database db) - (let* ((select-p (= (deref stmttype 0) 1)) - (iters (if select-p 0 1))) - - (oci-stmt-execute (deref svchp) (deref stmthp) (deref errhp) - iters 0 nil nil +oci-default+ :database db) - (cond (select-p - (make-query-cursor db stmthp types)) - (t - (oci-handle-free (deref stmthp) +oci-htype-stmt+) - nil))))))) - - -;; Return a QUERY-CURSOR representing the table returned from the OCI -;; operation done through STMTHP. TYPES is the argument of the same -;; name from the external SQL function, controlling type conversion -;; of the returned arguments. - -(defun make-query-cursor (db stmthp types) - (let ((qc (%make-query-cursor :db db - :stmthp stmthp - :cds (make-query-cursor-cds db stmthp types)))) - (refill-qc-buffers qc) - qc)) - - -;; the hairy part of MAKE-QUERY-CURSOR: Ask OCI for information -;; about table columns, translate the information into a Lisp -;; vector of column descriptors, and return it. - -;; Allegro defines several flavors of type conversion, but this -;; implementation only supports the :AUTO flavor. - -;; A note of explanation: OCI's internal number format uses 21 -;; bytes (42 decimal digits). 2 separate (?) one-byte fields, -;; scale and precision, are used to deduce the nature of these -;; 21 bytes. See pp. 3-10, 3-26, and 6-13 of OCI documentation -;; for more details. - -;; When calling OCI C code to handle the conversion, we have -;; only two numeric types available to pass the return value: -;; double-float and signed-long. It would be possible to -;; bypass the OCI conversion functions and write Lisp code -;; which reads the 21-byte field directly and decodes -;; it. However this is left as an exercise for the reader. :-) - -;; The following table describes the mapping, based on the implicit -;; assumption that C's "signed long" type is a 32-bit integer. -;; -;; Internal Values SQL Type C Return Type -;; =============== ======== ============= -;; Precision > 0 SCALE = -127 FLOAT --> double-float -;; Precision > 0 && <=9 SCALE = 0 INTEGER --> signed-long -;; Precision = 0 || > 9 SCALE = 0 BIG INTEGER --> double-float -;; Precision > 0 SCALE > 0 DECIMAL --> double-float - -;; (OCI uses 1-based indexing here.) - -;; KLUDGE: This should work for all other data types except those -;; which don't actually fit in their fixed-width field (BLOBs and the -;; like). As Winton says, we (Cadabra) don't need to worry much about -;; those, since we can't reason with them, so we don't use them. But -;; for a more general application it'd be good to have a more -;; selective and rigorously correct test here for whether we can -;; actually handle the given DEREF-DTYPE value. -- WHN 20000106 - -;; Note: The OCI documentation doesn't seem to say whether the COLNAME -;; value returned here is a newly-allocated copy which we're -;; responsible for freeing, or a pointer into some system copy which -;; will be freed when the system itself is shut down. But judging -;; from the way that the result is used in the cdemodsa.c example -;; program, it looks like the latter: we should make our own copy of -;; the value, but not try to free it. - -;; WORKAROUND: OCI seems to return ub2 values for the -;; +oci-attr-data-size+ attribute even though its documentation claims -;; that it returns a ub4, and even though the associated "sizep" value -;; is 4, not 2. In order to make the code here work reliably, without -;; having to patch it later if OCI is ever fixed to match its -;; documentation, we pre-zero COLSIZE before making the call into OCI. - -;; To exercise the weird OCI behavior (thereby blowing up the code -;; below, beware!) try setting this value into COLSIZE, calling OCI, -;; then looking at the value in COLSIZE. (setf colsize #x12345678) -;; debugging only - - -(defun make-query-cursor-cds (database stmthp types) - (declare (optimize (speed 3)) - (type oracle-database database) - (type (alien (* (* t))) stmthp)) - (with-slots (errhp) - database - (unless (eq types :auto) - (error "unsupported TYPES value")) - (with-alien ((dtype unsigned-short 1) - (parmdp (* t)) - (precision (unsigned 8)) - (scale (signed 8)) - (colname c-string) - (colnamelen unsigned-long) - (colsize unsigned-long) - (colsizesize unsigned-long) - (defnp (* t))) - (let ((buffer nil) - (sizeof nil)) - (do ((icolumn 0 (1+ icolumn)) - (cds-as-reversed-list nil)) - ((not (eql (oci-param-get (deref stmthp) +oci-htype-stmt+ - (deref errhp) (addr parmdp) - (1+ icolumn) :database database) - +oci-success+)) - (coerce (reverse cds-as-reversed-list) 'simple-vector)) - ;; Decode type of ICOLUMNth column into a type we're prepared to - ;; handle in Lisp. - (oci-attr-get parmdp +oci-dtype-param+ (addr dtype) - nil +oci-attr-data-type+ (deref errhp)) - (case dtype - (#.SQLT-DATE - (setf buffer (acquire-alien-resource char (* 32 +n-buf-rows+))) - (setf sizeof 32 dtype #.SQLT-STR)) - (2 ;; number - ;;(oci-attr-get parmdp +oci-dtype-param+ - ;;(addr precision) nil +oci-attr-precision+ - ;;(deref errhp)) - (oci-attr-get parmdp +oci-dtype-param+ - (addr scale) nil +oci-attr-scale+ - (deref errhp)) - (cond - ((zerop scale) - (setf buffer (acquire-alien-resource signed +n-buf-rows+) - sizeof 4 ;; sizeof(int) - dtype #.SQLT-INT)) - (t - (setf buffer (acquire-alien-resource double-float +n-buf-rows+) - sizeof 8 ;; sizeof(double) - dtype #.SQLT-FLT)))) - (t ; Default to SQL-STR - (setf colsize 0 - dtype #.SQLT-STR) - (oci-attr-get parmdp +oci-dtype-param+ (addr colsize) - (addr colsizesize) +oci-attr-data-size+ - (deref errhp)) - (let ((colsize-including-null (1+ colsize))) - (setf buffer (acquire-alien-resource char (* +n-buf-rows+ colsize-including-null))) - (setf sizeof colsize-including-null)))) - (let ((retcodes (acquire-alien-resource short +n-buf-rows+)) - (indicators (acquire-alien-resource short +n-buf-rows+))) - (push (make-cd :name "col" ;(subseq colname 0 colnamelen) - :sizeof sizeof - :buffer buffer - :oci-data-type dtype - :retcodes retcodes - :indicators indicators) - cds-as-reversed-list) - (oci-define-by-pos (deref stmthp) - (addr defnp) - (deref errhp) - (1+ icolumn) ; OCI 1-based indexing again - (alien-resource-buffer buffer) - sizeof - dtype - (alien-resource-buffer indicators) - nil - (alien-resource-buffer retcodes) - +oci-default+))))))) - -;; Release the resources associated with a QUERY-CURSOR. - -(defun close-query (qc) - (oci-handle-free (deref (qc-stmthp qc)) +oci-htype-stmt+) - (let ((cds (qc-cds qc))) - (dotimes (i (length cds)) - (release-cd-resources (aref cds i)))) - (values)) - - -;; Release the resources associated with a column description. - -(defun release-cd-resources (cd) - (free-alien-resource (cd-buffer cd)) - (free-alien-resource (cd-retcodes cd)) - (free-alien-resource (cd-indicators cd)) - (values)) - - -(defmethod print-object ((db oracle-database) stream) - (print-unreadable-object (db stream :type t :identity t) - (format stream "\"/~a/~a\"" - (slot-value db 'data-source-name) - (slot-value db 'user)))) - - -(defmethod database-name-from-spec (connection-spec (database-type (eql :oracle))) - (check-connection-spec connection-spec database-type (user password dsn)) - (destructuring-bind (user password dsn) - connection-spec - (declare (ignore password)) - (concatenate 'string "/" dsn "/" user))) - - -(defmethod database-connect (connection-spec (database-type (eql :oracle))) - (check-connection-spec connection-spec database-type (user password dsn)) - (destructuring-bind (user password data-source-name) - connection-spec - (let ((envhp (make-alien (* t))) - (errhp (make-alien (* t))) - (svchp (make-alien (* t))) - (srvhp (make-alien (* t)))) - ;; Requests to allocate environments and handles should never - ;; fail in normal operation, and they're done too early to - ;; handle errors very gracefully (since they're part of the - ;; error-handling mechanism themselves) so we just assert they - ;; work. - (setf (deref envhp) nil) - #+oci-8-1-5 - (progn - (oci-env-create (c-& envhp) +oci-default+ nil nil nil nil 0 nil) - (oci-handle-alloc (deref envhp) (c-& errhp) +oci-htype-error+ 0 nil)) - #-oci-8-1-5 - (progn - (oci-initialize +oci-object+ nil nil nil nil) - (ignore-errors (oci-handle-alloc nil (c-& envhp) +oci-htype-env+ 0 nil)) ;no testing return - (oci-env-init (c-& envhp) +oci-default+ 0 nil) - (oci-handle-alloc (deref envhp) (c-& errhp) +oci-htype-error+ 0 nil) - (oci-handle-alloc (deref envhp) (c-& srvhp) +oci-htype-server+ 0 nil) - ;;(osucc (oci-server-attach srvhp errhp nil 0 +oci-default+)) - (oci-handle-alloc (deref envhp) (c-& svchp) +oci-htype-svcctx+ 0 nil) - ;; oci-handle-alloc((dvoid *)encvhp, (dvoid **)&stmthp, OCI_HTYPE_STMT, 0, 0); - #+nil - (oci-attr-set (deref svchp) +oci-htype-svcctx+ (deref srvhp) 0 +oci-attr-server+ errhp) - ) - - #+nil - (format t "Logging in as user '~A' to database ~A~%" - user password data-source-name) - (oci-logon (deref envhp) (deref errhp) (c-& svchp) - user (length user) - password (length password) - data-source-name (length data-source-name)) - (let ((db (make-instance 'oracle-database - :name (database-name-from-spec connection-spec - database-type) - :envhp envhp - :errhp errhp - :db-type :oracle - :svchp svchp - :dsn data-source-name - :user user))) - ;; :date-format-length (1+ (length date-format))))) - (sql:execute-command - (format nil "alter session set NLS_DATE_FORMAT='~A'" - (date-format db)) :database db) - db)))) - - -;; Close a database connection. - -(defmethod database-disconnect ((database oracle-database)) - (osucc (oci-logoff (deref (svchp database)) (deref (errhp database)))) - (osucc (oci-handle-free (deref (envhp database)) +oci-htype-env+)) - ;; Note: It's neither required nor allowed to explicitly deallocate the - ;; ERRHP handle here, since it's owned by the ENVHP deallocated above, - ;; and was therefore automatically deallocated at the same time. - t) - -;;; Do the database operation described in SQL-STMT-STRING on database -;;; DB and, if the command is a SELECT, return a representation of the -;;; resulting table. The representation of the table is controlled by the -;;; QUERY argument: -;;; * If QUERY is NIL, the table is returned as a list of rows, with -;;; each row represented by a list. -;;; * If QUERY is non-NIL, the result is returned as a QUERY-CURSOR -;;; suitable for FETCH-ROW and CLOSE-QUERY -;;; The TYPES argument controls the type conversion method used -;;; to construct the table. The Allegro version supports several possible -;;; values for this argument, but we only support :AUTO. - -(defmethod database-query (query-expression (database oracle-database)) - (let ((cursor (sql-stmt-exec query-expression database :types :auto))) - (declare (type (or query-cursor null) cursor)) - (if (null cursor) ; No table was returned. - (values) - (do ((reversed-result nil)) - (nil) - (let* ((eof-value :eof) - (row (fetch-row cursor nil eof-value))) - (when (eq row eof-value) - (close-query cursor) - (return (nreverse reversed-result))) - (push row reversed-result)))))) - - -(defmethod database-create-sequence - (sequence-name (database oracle-database)) - (execute-command - (concatenate 'string "CREATE SEQUENCE " - (sql-escape sequence-name)) - :database database)) - -(defmethod database-drop-sequence - (sequence-name (database oracle-database)) - (execute-command - (concatenate 'string "DROP SEQUENCE " - (sql-escape sequence-name)) - :database database)) - -(defmethod database-sequence-next (sequence-name (database oracle-database)) - (caar - (query - (concatenate 'string "SELECT " - (sql-escape sequence-name) - ".NEXTVAL FROM dual" - ) :database database))) - - -(defmethod database-execute-command - (sql-expression (database oracle-database)) - (database-query sql-expression database) - ;; HACK HACK HACK - (database-query "commit" database) - t) - - -;;; a column descriptor: metadata about the data in a table -(defstruct (cd (:constructor make-cd) - (:print-function print-cd)) - ;; name of this column - (name (error "missing NAME") :type simple-string :read-only t) - ;; the size in bytes of a single element - (sizeof (error "missing SIZE") :type fixnum :read-only t) - ;; an array of +N-BUF-ROWS+ elements in C representation - (buffer (error "Missing BUFFER") - :type alien-resource - :read-only t) - ;; an array of +N-BUF-ROWS+ OCI return codes in C representation. - ;; (There must be one return code for every element of every - ;; row in order to be able to represent nullness.) - (retcodes (error "Missing RETCODES") - :type alien-resource - :read-only t) - (indicators (error "Missing INDICATORS") - :type alien-resource - :read-only t) - ;; the OCI code for the data type of a single element - (oci-data-type (error "missing OCI-DATA-TYPE") - :type fixnum - :read-only t)) - - -(defun print-cd (cd stream depth) - (declare (ignore depth)) - (print-unreadable-object (cd stream :type t) - (format stream - ":NAME ~S :OCI-DATA-TYPE ~S :OCI-DATA-SIZE ~S" - (cd-name cd) - (cd-oci-data-type cd) - (cd-sizeof cd)))) - -;;; the result of a database query: a cursor through a table -(defstruct (oracle-result-set (:print-function print-query-cursor) - (:conc-name "QC-") - (:constructor %make-query-cursor)) - (db (error "missing DB") ; db conn. this table is associated with - :type db - :read-only t) - (stmthp (error "missing STMTHP") ; the statement handle used to create - :type alien ; this table. owned by the QUERY-CURSOR - :read-only t) ; object, deallocated on CLOSE-QUERY - (cds) ; (error "missing CDS") ; column descriptors -; :type (simple-array cd 1) -; :read-only t) - (n-from-oci 0 ; buffered rows: number of rows recv'd - :type (integer 0 #.+n-buf-rows+)) ; from the database on the last read - (n-to-dbi 0 ; number of buffered rows returned, i.e. - :type (integer 0 #.+n-buf-rows+)) ; the index, within the buffered rows, - ; of the next row which hasn't already - ; been returned - (total-n-from-oci 0 ; total number of bytes recv'd from OCI - :type unsigned-byte) ; in all reads - (oci-end-seen-p nil)) ; Have we seen the end of OCI - ; data, i.e. OCI returning - ; less data than we requested? - ; OCI doesn't seem to like us - ; to try to read more data - ; from it after that.. - -(defun print-query-cursor (qc stream depth) - (declare (ignore depth)) - (print-unreadable-object (qc stream :type t :identity t) - (prin1 (qc-db qc) stream))) - - -(defmethod database-query-result-set (query-expression (database oracle-database) &optional full-set) - ) - -(defmethod database-dump-result-set (result-set (database oracle-database)) - ) - -(defmethod database-store-next-row (result-set (database oracle-database) list) - ) - -(defmethod sql-sys::database-start-transaction ((database oracle-database)) - (call-next-method)) - -;;(with-slots (svchp errhp) database -;; (osucc (oci-trans-start (deref svchp) -;; (deref errhp) -;; 60 -;; +oci-trans-new+))) -;; t) - - -(defmethod sql-sys::database-commit-transaction ((database oracle-database)) - (call-next-method) - (with-slots (svchp errhp) database - (osucc (oci-trans-commit (deref svchp) - (deref errhp) - 0))) - t) - -(defmethod sql-sys::database-abort-transaction ((database oracle-database)) - (call-next-method) - (osucc (oci-trans-rollback (deref (svchp database)) - (deref (errhp database)) - 0)) - t) - -(defparameter *constraint-types* - '(("NOT-NULL" . "NOT NULL"))) - -(defmethod database-output-sql ((str string) (database oracle-database)) - (if (and (null (position #\' str)) - (null (position #\\ str))) - (format nil "'~A'" str) - (let* ((l (length str)) - (buf (make-string (+ l 3)))) - (setf (aref buf 0) #\') - (do ((i 0 (incf i)) - (j 1 (incf j))) - ((= i l) (setf (aref buf j) #\')) - (if (= j (- (length buf) 1)) - (setf buf (adjust-array buf (+ (length buf) 1)))) - (cond ((eql (aref str i) #\') - (setf (aref buf j) #\') - (incf j))) - (setf (aref buf j) (aref str i))) - buf))) - -