X-Git-Url: http://git.kpe.io/?p=clsql.git;a=blobdiff_plain;f=sql%2Ftable.lisp;h=bc68a814dbbf0058803f6c6ebb96b310bdddcb51;hp=b9a5ef1bd1534d9215e441123549c63d9d299ef0;hb=21ae7203d719886a1f044992e463d5f463727ac0;hpb=db5e98459718c42c3ba6aba2b45b61c26837c991 diff --git a/sql/table.lisp b/sql/table.lisp index b9a5ef1..bc68a81 100644 --- a/sql/table.lisp +++ b/sql/table.lisp @@ -20,26 +20,31 @@ ;; Utilities -(defun database-identifier (name) +(defun database-identifier (name database) (sql-escape (etypecase name - (string - (string-upcase name)) - (sql-ident - (sql-output name)) - (symbol - (sql-output name))))) + ;; honor case of strings + (string name + #+nil (convert-to-db-default-case name database)) + (sql-ident (sql-output name database)) + (symbol (sql-output name database))))) ;; Tables (defun create-table (name description &key (database *default-database*) (constraints nil) (transactions t)) - "Create a table called NAME, in DATABASE which defaults to -*DEFAULT-DATABASE*, containing the attributes in DESCRIPTION which is -a list containing lists of attribute-name and type information pairs." + "Creates a table called NAME, which may be a string, symbol or +SQL table identifier, in DATABASE which defaults to +*DEFAULT-DATABASE*. DESCRIPTION is a list whose elements are +lists containing the attribute names, types, and other +constraints such as not-null or primary-key for each column in +the table. CONSTRAINTS is a string representing an SQL table +constraint expression or a list of such strings. With MySQL +databases, if TRANSACTIONS is t an InnoDB table is created which +supports transactions." (let* ((table-name (etypecase name (symbol (sql-expression :attribute name)) - (string (sql-expression :attribute (make-symbol name))) + (string (sql-expression :attribute name)) (sql-ident name))) (stmt (make-instance 'sql-create-table :name table-name @@ -49,38 +54,46 @@ a list containing lists of attribute-name and type information pairs." (execute-command stmt :database database))) (defun drop-table (name &key (if-does-not-exist :error) - (database *default-database*)) - "Drops table NAME from DATABASE which defaults to -*DEFAULT-DATABASE*. If the table does not exist and IF-DOES-NOT-EXIST -is :ignore then DROP-TABLE returns nil whereas an error is signalled -if IF-DOES-NOT-EXIST is :error." - (let ((table-name (database-identifier name))) + (database *default-database*)) + "Drops the table called NAME from DATABASE which defaults to +*DEFAULT-DATABASE*. If the table does not exist and +IF-DOES-NOT-EXIST is :ignore then DROP-TABLE returns nil whereas +an error is signalled if IF-DOES-NOT-EXIST is :error." + (let ((table-name (database-identifier name database))) (ecase if-does-not-exist (:ignore (unless (table-exists-p table-name :database database) (return-from drop-table nil))) (:error t)) + + ;; Fixme: move to clsql-oracle (let ((expr (concatenate 'string "DROP TABLE " table-name))) + (when (and (find-package 'clsql-oracle) + (eq :oracle (database-type database)) + (eql 10 (slot-value database + (intern (symbol-name '#:major-server-version) + (symbol-name '#:clsql-oracle))))) + (setq expr (concatenate 'string expr " PURGE"))) + (execute-command expr :database database)))) (defun list-tables (&key (owner nil) (database *default-database*)) - "List all tables in DATABASE which defaults to -*DEFAULT-DATABASE*. If OWNER is nil, only user-owned tables are -considered. This is the default. If OWNER is :all , all tables are -considered. If OWNER is a string, this denotes a username and only -tables owned by OWNER are considered. Table names are returned as a -list of strings." + "Returns a list of strings representing table names in DATABASE +which defaults to *DEFAULT-DATABASE*. OWNER is nil by default +which means that only tables owned by users are listed. If OWNER +is a string denoting a user name, only tables owned by OWNER are +listed. If OWNER is :all then all tables are listed." (database-list-tables database :owner owner)) (defun table-exists-p (name &key (owner nil) (database *default-database*)) - "Test for existence of an SQL table called NAME in DATABASE which -defaults to *DEFAULT-DATABASE*. If OWNER is nil, only user-owned -tables are considered. This is the default. If OWNER is :all , all -tables are considered. If OWNER is a string, this denotes a username -and only tables owned by OWNER are considered. Table names are -returned as a list of strings." - (when (member (database-identifier name) + "Tests for the existence of an SQL table called NAME in DATABASE +which defaults to *DEFAULT-DATABASE*. OWNER is nil by default +which means that only tables owned by users are examined. If +OWNER is a string denoting a user name, only tables owned by +OWNER are examined. If OWNER is :all then all tables are +examined." + (when (member (database-identifier name database) (list-tables :owner owner :database database) :test #'string-equal) t)) @@ -90,11 +103,12 @@ returned as a list of strings." (defun create-view (name &key as column-list (with-check-option nil) (database *default-database*)) - "Creates a view called NAME using the AS query and the optional -COLUMN-LIST and WITH-CHECK-OPTION. The COLUMN-LIST argument is a list -of columns to add to the view. The WITH-CHECK-OPTION adds 'WITH CHECK -OPTION' to the resulting SQL. The default value of WITH-CHECK-OPTION -is NIL. The default value of DATABASE is *DEFAULT-DATABASE*." + "Creates a view called NAME in DATABASE which defaults to +*DEFAULT-DATABASE*. The view is created using the query AS and +the columns of the view may be specified using the COLUMN-LIST +parameter. The WITH-CHECK-OPTION is nil by default but if it has +a non-nil value, then all insert/update commands on the view are +checked to ensure that the new data satisfy the query AS." (let* ((view-name (etypecase name (symbol (sql-expression :attribute name)) (string (sql-expression :attribute (make-symbol name))) @@ -108,11 +122,11 @@ is NIL. The default value of DATABASE is *DEFAULT-DATABASE*." (defun drop-view (name &key (if-does-not-exist :error) (database *default-database*)) - "Deletes view NAME from DATABASE which defaults to -*DEFAULT-DATABASE*. If the view does not exist and IF-DOES-NOT-EXIST -is :ignore then DROP-VIEW returns nil whereas an error is signalled if -IF-DOES-NOT-EXIST is :error." - (let ((view-name (database-identifier name))) + "Drops the view called NAME from DATABASE which defaults to +*DEFAULT-DATABASE*. If the view does not exist and +IF-DOES-NOT-EXIST is :ignore then DROP-VIEW returns nil whereas +an error is signalled if IF-DOES-NOT-EXIST is :error." + (let ((view-name (database-identifier name database))) (ecase if-does-not-exist (:ignore (unless (view-exists-p view-name :database database) @@ -123,21 +137,20 @@ IF-DOES-NOT-EXIST is :error." (execute-command expr :database database)))) (defun list-views (&key (owner nil) (database *default-database*)) - "List all views in DATABASE which defaults to *DEFAULT-DATABASE*. If -OWNER is nil, only user-owned views are considered. This is the -default. If OWNER is :all , all views are considered. If OWNER is a -string, this denotes a username and only views owned by OWNER are -considered. View names are returned as a list of strings." + "Returns a list of strings representing view names in DATABASE +which defaults to *DEFAULT-DATABASE*. OWNER is nil by default +which means that only views owned by users are listed. If OWNER +is a string denoting a user name, only views owned by OWNER are +listed. If OWNER is :all then all views are listed." (database-list-views database :owner owner)) (defun view-exists-p (name &key (owner nil) (database *default-database*)) - "Test for existence of an SQL view called NAME in DATABASE which -defaults to *DEFAULT-DATABASE*. If OWNER is nil, only user-owned views -are considered. This is the default. If OWNER is :all , all views are -considered. If OWNER is a string, this denotes a username and only -views owned by OWNER are considered. View names are returned as a list -of strings." - (when (member (database-identifier name) + "Tests for the existence of an SQL view called NAME in DATABASE +which defaults to *DEFAULT-DATABASE*. OWNER is nil by default +which means that only views owned by users are examined. If OWNER +is a string denoting a user name, only views owned by OWNER are +examined. If OWNER is :all then all views are examined." + (when (member (database-identifier name database) (list-views :owner owner :database database) :test #'string-equal) t)) @@ -147,14 +160,15 @@ of strings." (defun create-index (name &key on (unique nil) attributes (database *default-database*)) - "Creates an index called NAME on the table specified by ON. The -attributes of the table to index are given by ATTRIBUTES. Setting -UNIQUE to T includes UNIQUE in the SQL index command, specifying that -the columns indexed must contain unique values. The default value of -UNIQUE is nil. The default value of DATABASE is *DEFAULT-DATABASE*." - (let* ((index-name (database-identifier name)) - (table-name (database-identifier on)) - (attributes (mapcar #'database-identifier (listify attributes))) + "Creates an index called NAME on the table specified by ON in +DATABASE which default to *DEFAULT-DATABASE*. The table +attributes to use in constructing the index NAME are specified by +ATTRIBUTES. The UNIQUE argument is nil by default but if it has a +non-nil value then the indexed attributes must have unique +values." + (let* ((index-name (database-identifier name database)) + (table-name (database-identifier on database)) + (attributes (mapcar #'(lambda (a) (database-identifier a database)) (listify attributes))) (stmt (format nil "CREATE ~A INDEX ~A ON ~A (~{~A~^, ~})" (if unique "UNIQUE" "") index-name table-name attributes))) @@ -163,12 +177,13 @@ UNIQUE is nil. The default value of DATABASE is *DEFAULT-DATABASE*." (defun drop-index (name &key (if-does-not-exist :error) (on nil) (database *default-database*)) - "Deletes index NAME from table FROM in DATABASE which defaults to -*DEFAULT-DATABASE*. If the index does not exist and IF-DOES-NOT-EXIST -is :ignore then DROP-INDEX returns nil whereas an error is signalled -if IF-DOES-NOT-EXIST is :error. The argument ON allows the optional -specification of a table to drop the index from." - (let ((index-name (database-identifier name))) + "Drops the index called NAME in DATABASE which defaults to +*DEFAULT-DATABASE*. If the index does not exist and +IF-DOES-NOT-EXIST is :ignore then DROP-INDEX returns nil whereas +an error is signalled if IF-DOES-NOT-EXIST is :error. The +argument ON allows the optional specification of a table to drop +the index from." + (let ((index-name (database-identifier name database))) (ecase if-does-not-exist (:ignore (unless (index-exists-p index-name :database database) @@ -180,102 +195,179 @@ specification of a table to drop the index from." (execute-command (format nil "DROP INDEX ~A~A" index-name (if (null on) "" (concatenate 'string " ON " - (database-identifier on)))) + (database-identifier on database)))) :database database))) (defun list-indexes (&key (owner nil) (database *default-database*)) - "List all indexes in DATABASE, which defaults to -*default-database*. If OWNER is :all , all indexs are considered. If -OWNER is a string, this denotes a username and only indexs owned by -OWNER are considered. Index names are returned as a list of strings." + "Returns a list of strings representing index names in DATABASE +which defaults to *DEFAULT-DATABASE*. OWNER is nil by default +which means that only indexes owned by users are listed. If OWNER +is a string denoting a user name, only indexes owned by OWNER are +listed. If OWNER is :all then all indexes are listed." (database-list-indexes database :owner owner)) (defun list-table-indexes (table &key (owner nil) (database *default-database*)) - "List all indexes in DATABASE for a TABLE, which defaults to -*default-database*. If OWNER is :all , all indexs are considered. If -OWNER is a string, this denotes a username and only indexs owned by -OWNER are considered. Index names are returned as a list of strings." - (database-list-table-indexes (database-identifier table) + "Returns a list of strings representing index names on the +table specified by TABLE in DATABASE which defaults to +*DEFAULT-DATABASE*. OWNER is nil by default which means that only +indexes owned by users are listed. If OWNER is a string denoting +a user name, only indexes owned by OWNER are listed. If OWNER +is :all then all indexes are listed." + (database-list-table-indexes (database-identifier table database) database :owner owner)) (defun index-exists-p (name &key (owner nil) (database *default-database*)) - "Test for existence of an index called NAME in DATABASE which -defaults to *DEFAULT-DATABASE*. If OWNER is :all , all indexs are -considered. If OWNER is a string, this denotes a username and only -indexs owned by OWNER are considered. Index names are returned as a -list of strings." - (when (member (database-identifier name) + "Tests for the existence of an SQL index called NAME in DATABASE +which defaults to *DEFAULT-DATABASE*. OWNER is nil by default +which means that only indexes owned by users are examined. If +OWNER is a string denoting a user name, only indexes owned by +OWNER are examined. If OWNER is :all then all indexes are +examined." + (when (member (database-identifier name database) (list-indexes :owner owner :database database) :test #'string-equal) t)) ;; Attributes +(defvar *cache-table-queries-default* nil + "Specifies the default behaivour for caching of attribute + types. Meaningful values are t, nil and :flush as described for + the action argument to CACHE-TABLE-QUERIES.") + +(defun cache-table-queries (table &key (action nil) (database *default-database*)) + "Controls the caching of attribute type information on the +table specified by TABLE in DATABASE which defaults to +*DEFAULT-DATABASE*. ACTION specifies the caching behaviour to +adopt. If its value is t then attribute type information is +cached whereas if its value is nil then attribute type +information is not cached. If ACTION is :flush then all existing +type information in the cache for TABLE is removed, but caching +is still enabled. TABLE may be a string representing a table for +which the caching action is to be taken while the caching action +is applied to all tables if TABLE is t. Alternativly, when TABLE +is :default, the default caching action specified by +*CACHE-TABLE-QUERIES-DEFAULT* is applied to all table for which a +caching action has not been explicitly set." + (with-slots (attribute-cache) database + (cond + ((stringp table) + (multiple-value-bind (val found) (gethash table attribute-cache) + (cond + ((and found (eq action :flush)) + (setf (gethash table attribute-cache) (list t nil))) + ((and found (eq action t)) + (setf (gethash table attribute-cache) (list t (second val)))) + ((and found (null action)) + (setf (gethash table attribute-cache) (list nil nil))) + ((not found) + (setf (gethash table attribute-cache) (list action nil)))))) + ((eq table t) + (maphash (lambda (k v) + (cond + ((eq action :flush) + (setf (gethash k attribute-cache) (list t nil))) + ((null action) + (setf (gethash k attribute-cache) (list nil nil))) + ((eq t action) + (setf (gethash k attribute-cache) (list t (second v)))))) + attribute-cache)) + ((eq table :default) + (maphash (lambda (k v) + (when (eq (first v) :unspecified) + (cond + ((eq action :flush) + (setf (gethash k attribute-cache) (list t nil))) + ((null action) + (setf (gethash k attribute-cache) (list nil nil))) + ((eq t action) + (setf (gethash k attribute-cache) (list t (second v))))))) + attribute-cache)))) + (values)) + + (defun list-attributes (name &key (owner nil) (database *default-database*)) - "List the attributes of a attribute called NAME in DATABASE which -defaults to *DEFAULT-DATABASE*. If OWNER is nil, only user-owned -attributes are considered. This is the default. If OWNER is :all , all -attributes are considered. If OWNER is a string, this denotes a -username and only attributes owned by OWNER are considered. Attribute -names are returned as a list of strings. Attributes are returned as a -list of strings." - (database-list-attributes (database-identifier name) database :owner owner)) + "Returns a list of strings representing the attributes of table +NAME in DATABASE which defaults to *DEFAULT-DATABASE*. OWNER is +nil by default which means that only attributes owned by users +are listed. If OWNER is a string denoting a user name, only +attributes owned by OWNER are listed. If OWNER is :all then all +attributes are listed." + (database-list-attributes (database-identifier name database) database + :owner owner)) (defun attribute-type (attribute table &key (owner nil) (database *default-database*)) - "Return the field type of the ATTRIBUTE in TABLE. The optional -keyword argument DATABASE specifies the database to query, defaulting -to *DEFAULT-DATABASE*. If OWNER is nil, only user-owned attributes are -considered. This is the default. If OWNER is :all , all attributes are -considered. If OWNER is a string, this denotes a username and only -attributes owned by OWNER are considered. Attribute names are returned -as a list of strings. Attributes are returned as a list of strings." - (database-attribute-type (database-identifier attribute) - (database-identifier table) + "Returns a string representing the field type of the supplied +attribute ATTRIBUTE in the table specified by TABLE in DATABASE +which defaults to *DEFAULT-DATABASE*. OWNER is nil by default +which means that the attribute specified by ATTRIBUTE, if it +exists, must be user owned else nil is returned. If OWNER is a +string denoting a user name, the attribute, if it exists, must be +owned by OWNER else nil is returned, whereas if OWNER is :all +then the attribute, if it exists, will be returned regardless of +its owner." + (database-attribute-type (database-identifier attribute database) + (database-identifier table database) database :owner owner)) (defun list-attribute-types (table &key (owner nil) (database *default-database*)) - "Returns type information for the attributes in TABLE from DATABASE -which has a default value of *default-database*. If OWNER is nil, only -user-owned attributes are considered. This is the default. If OWNER is -:all, all attributes are considered. If OWNER is a string, this -denotes a username and only attributes owned by OWNER are -considered. Returns a list in which each element is a list (attribute -datatype). Attribute is a string denoting the atribute name. Datatype -is the vendor-specific type returned by ATTRIBUTE-TYPE." - (mapcar #'(lambda (type) - (list type (attribute-type type table :database database - :owner owner))) - (list-attributes table :database database :owner owner))) - -;(defun add-attribute (table attribute &key (database *default-database*)) -; (database-add-attribute table attribute database)) - -;(defun rename-attribute (table oldatt newname -; &key (database *default-database*)) -; (error "(rename-attribute ~a ~a ~a ~a) is not implemented" -; table oldatt newname database)) - + "Returns a list containing information about the SQL types of +each of the attributes in the table specified by TABLE in +DATABASE which has a default value of *DEFAULT-DATABASE*. OWNER +is nil by default which means that only attributes owned by users +are listed. If OWNER is a string denoting a user name, only +attributes owned by OWNER are listed. If OWNER is :all then all +attributes are listed. The elements of the returned list are +lists where the first element is the name of the attribute, the +second element is its SQL type, the third is the type precision, +the fourth is the scale of the attribute and the fifth is 1 if +the attribute accepts null values and otherwise 0." + (with-slots (attribute-cache) database + (let ((table-ident (database-identifier table database))) + (multiple-value-bind (val found) (gethash table-ident attribute-cache) + (if (and found (second val)) + (second val) + (let ((types (mapcar #'(lambda (attribute) + (cons attribute + (multiple-value-list + (database-attribute-type + (database-identifier attribute + database) + table-ident + database + :owner owner)))) + (list-attributes table :database database + :owner owner)))) + (cond + ((and (not found) (eq t *cache-table-queries-default*)) + (setf (gethash table-ident attribute-cache) + (list :unspecified types))) + ((and found (eq t (first val)) + (setf (gethash table-ident attribute-cache) + (list t types))))) + types)))))) + ;; Sequences (defun create-sequence (name &key (database *default-database*)) - "Create a sequence called NAME in DATABASE which defaults to + "Creates a sequence called NAME in DATABASE which defaults to *DEFAULT-DATABASE*." - (let ((sequence-name (database-identifier name))) + (let ((sequence-name (database-identifier name database))) (database-create-sequence sequence-name database)) (values)) (defun drop-sequence (name &key (if-does-not-exist :error) (database *default-database*)) - "Drops sequence NAME from DATABASE which defaults to + "Drops the sequence called NAME from DATABASE which defaults to *DEFAULT-DATABASE*. If the sequence does not exist and -IF-DOES-NOT-EXIST is :ignore then DROP-SEQUENCE returns nil whereas an -error is signalled if IF-DOES-NOT-EXIST is :error." - (let ((sequence-name (database-identifier name))) +IF-DOES-NOT-EXIST is :ignore then DROP-SEQUENCE returns nil +whereas an error is signalled if IF-DOES-NOT-EXIST is :error." + (let ((sequence-name (database-identifier name database))) (ecase if-does-not-exist (:ignore (unless (sequence-exists-p sequence-name :database database) @@ -285,32 +377,40 @@ error is signalled if IF-DOES-NOT-EXIST is :error." (values)) (defun list-sequences (&key (owner nil) (database *default-database*)) - "List all sequences in DATABASE, which defaults to -*default-database*. If OWNER is nil, only user-owned sequences are -considered. This is the default. If OWNER is :all , all sequences are -considered. If OWNER is a string, this denotes a username and only -sequences owned by OWNER are considered. Sequence names are returned -as a list of strings." + "Returns a list of strings representing sequence names in +DATABASE which defaults to *DEFAULT-DATABASE*. OWNER is nil by +default which means that only sequences owned by users are +listed. If OWNER is a string denoting a user name, only sequences +owned by OWNER are listed. If OWNER is :all then all sequences +are listed." (database-list-sequences database :owner owner)) (defun sequence-exists-p (name &key (owner nil) (database *default-database*)) - "Test for existence of a sequence called NAME in DATABASE which -defaults to *DEFAULT-DATABASE*." - (when (member (database-identifier name) + "Tests for the existence of an SQL sequence called NAME in +DATABASE which defaults to *DEFAULT-DATABASE*. OWNER is nil by +default which means that only sequences owned by users are +examined. If OWNER is a string denoting a user name, only +sequences owned by OWNER are examined. If OWNER is :all then all +sequences are examined." + (when (member (database-identifier name database) (list-sequences :owner owner :database database) :test #'string-equal) t)) (defun sequence-next (name &key (database *default-database*)) - "Return the next value in the sequence NAME in DATABASE." - (database-sequence-next (database-identifier name) database)) + "Return the next value in the sequence called NAME in DATABASE + which defaults to *DEFAULT-DATABASE*." + (database-sequence-next (database-identifier name database) database)) (defun set-sequence-position (name position &key (database *default-database*)) - "Explicitly set the the position of the sequence NAME in DATABASE to -POSITION." - (database-set-sequence-position (database-identifier name) position database)) + "Explicitly set the the position of the sequence called NAME in +DATABASE, which defaults to *DEFAULT-DATABSE*, to POSITION." + (database-set-sequence-position (database-identifier name database) + position database)) (defun sequence-last (name &key (database *default-database*)) - "Return the last value of the sequence NAME in DATABASE." - (database-sequence-last (database-identifier name) database)) + "Return the last value of the sequence called NAME in DATABASE + which defaults to *DEFAULT-DATABASE*." + (database-sequence-last (database-identifier name database) database)) +