more docs, fix circular vocabs

db4
Doug Coleman 2008-09-25 00:05:41 -05:00
parent e56d49334e
commit 2057e643e7
4 changed files with 148 additions and 12 deletions

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@ -1,7 +1,7 @@
! Copyright (C) 2008 Doug Coleman.
! See http://factorcode.org/license.txt for BSD license.
USING: classes kernel help.markup help.syntax sequences
alien assocs strings math multiline ;
alien assocs strings math multiline quotations ;
IN: db
HELP: db
@ -45,7 +45,22 @@ HELP: prepared-statement
{ $description } ;
HELP: result-set
{ $description } ;
{ $description "An object encapsulating a raw SQL result object. There are two ways in which a result set can be accessed, but they are specific to the database backend in use."
{ $subsection "db-random-access-result-set" }
{ $subsection "db-sequential-result-set" }
} ;
HELP: init-result-set
{ $values
{ "result-set" result-set } }
{ $description "" } ;
HELP: new-result-set
{ $values
{ "query" "a query" } { "handle" alien } { "class" class }
{ "result-set" result-set } }
{ $description "Creates a new " { $link result-set } " object of type " { $snippet "class" } "." } ;
HELP: new-statement
{ $values { "sql" string } { "in" sequence } { "out" sequence } { "class" class } { "statement" statement } }
@ -81,7 +96,7 @@ HELP: query-results
{ $values { "query" object }
{ "result-set" result-set }
}
{ $description "" } ;
{ $description "Returns a " { $link result-set } " object representing the reults of a SQL query." } ;
HELP: #rows
{ $values { "result-set" result-set } { "n" integer } }
@ -95,32 +110,119 @@ HELP: row-column
{ $values { "result-set" result-set } { "column" integer }
{ "obj" object }
}
{ $description "" } ;
{ $description "Returns the value indexed by " { $snippet "column" } " in the current row of a " { $link result-set } "." } ;
HELP: row-column-typed
{ $values { "result-set" result-set } { "column" integer }
{ "sql" "sql" } }
{ $description "" } ;
{ $description "Returns the value indexed by " { $snippet "column" } " in the current row of a " { $link result-set } " and converts the result based on a type stored in the " { $link result-set } "'s " { $slot "out-params" } "." } ;
HELP: advance-row
{ $values { "result-set" result-set } }
;
{ $description "Advanced the pointer to an underlying SQL result set stored in a " { $link result-set } " object." } ;
HELP: more-rows?
{ $values { "result-set" result-set } { "?" "a boolean" } }
;
{ $description "Returns true if the " { $link result-set } " has more rows to traverse." } ;
HELP: execute-statement*
{ $values { "statement" statement } { "type" object } }
{ $description } ;
HELP: execute-one-statement
{ $values
{ "statement" null } }
{ $description "" } ;
HELP: execute-statement
{ $values { "statement" statement } }
{ $description "" } ;
HELP: begin-transaction
{ $description "Begins a new transaction. User code should make use of the " { $link with-transaction } " combinator." } ;
HELP: bind-statement
{ $values
{ "obj" object } { "statement" null } }
{ $description "" } ;
HELP: commit-transaction
{ $description "Commits a transaction. User code should make use of the " { $link with-transaction } " combinator." } ;
HELP: default-query
{ $values
{ "query" null }
{ "result-set" null } }
{ $description "" } ;
HELP: in-transaction
{ $description "A variable that is set true when a transaction is in progress." } ;
HELP: in-transaction?
{ $values
{ "?" "a boolean" } }
{ $description "Returns true if there is currently a transaction in progress in this scope." } ;
HELP: query-each
{ $values
{ "statement" null } { "quot" quotation } }
{ $description "" } ;
HELP: query-map
{ $values
{ "statement" null } { "quot" quotation }
{ "seq" sequence } }
{ $description "" } ;
HELP: rollback-transaction
{ $description "Rolls back a transaction; no data is committed to the database. User code should make use of the " { $link with-transaction } " combinator." } ;
HELP: sql-command
{ $values
{ "sql" string } }
{ $description "Executes a SQL string using the databse in the " { $link db } " symbol." } ;
HELP: sql-query
{ $values
{ "sql" string }
{ "rows" "an array of arrays of strings" } }
{ $description "Runs a SQL query of raw text in the database in the " { $link db } " symbol. Each row is returned as an array of strings; no type-conversions are done on the resulting data." } ;
{ sql-command sql-query } related-words
HELP: sql-row
{ $values
{ "result-set" result-set }
{ "seq" sequence } }
{ $description "Returns the current row in a " { $link result-set } " as an array of strings." } ;
HELP: sql-row-typed
{ $values
{ "result-set" result-set }
{ "seq" sequence } }
{ $description "Returns the current row in a " { $link result-set } " as an array of typed Factor objects." } ;
{ sql-row sql-row-typed } related-words
HELP: with-db
{ $values
{ "seq" sequence } { "class" class } { "quot" quotation } }
{ $description "Calls the quotation with a database bound to the " { $link db } " symbol. The database called is based on the " { $snippet "class" } " with the " } ;
HELP: with-transaction
{ $values
{ "quot" quotation } }
{ $description "" } ;
ARTICLE: "db" "Database library"
{ $subsection "db-custom-database-combinators" }
{ $subsection "db-protocol" }
{ $subsection "db-result-sets" }
{ $subsection "db-lowlevel-tutorial" }
"Higher-level database:"
{ $vocab-subsection "Database types" "db.types" }
@ -135,6 +237,40 @@ ARTICLE: "db" "Database library"
{ $subsection "db-porting-the-library" }
;
ARTICLE: "db-random-access-result-set" "Random access result sets"
"Random-access result sets do not have to be traversed in order. For instance, PostgreSQL's result set object can be accessed as a matrix with i,j coordinates."
$nl
"Databases which work in this way must provide methods for the following traversal words:"
{ $subsection #rows }
{ $subsection #columns }
{ $subsection row-column }
{ $subsection row-column-typed } ;
ARTICLE: "db-sequential-result-set" "Sequential result sets"
"Sequential result sets can be iterated one element after the next. SQLite's result sets offer this method of traversal."
$nl
"Databases which work in this way must provide methods for the following traversal words:"
{ $subsection more-rows? }
{ $subsection advance-row }
{ $subsection row-column }
{ $subsection row-column-typed } ;
ARTICLE: "db-result-sets" "Result sets"
"Result sets are the encapsulated, database-specific results from a SQL query."
$nl
"Two possible protocols for iterating over result sets exist:"
{ $subsection "db-random-access-result-set" }
{ $subsection "db-sequential-result-set" }
"Query the number of rows or columns:"
{ $subsection #rows }
{ $subsection #columns }
"Traversing a result set:"
{ $subsection advance-row }
{ $subsection more-rows? }
"Pulling out a single row of results:"
{ $subsection row-column }
{ $subsection row-column-typed } ;
ARTICLE: "db-protocol" "Low-level database protocol"
"The high-level protocol (see " { $vocab-link "db.tuples" } ") uses this low-level protocol for executing statements and queries."
;
@ -157,7 +293,6 @@ USING: db.sqlite db io.files ;
{ "my-database.db" temp-file } sqlite-db rot with-db ;
"> }
;
ABOUT: "db"

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@ -1,7 +1,7 @@
! Copyright (C) 2008 Doug Coleman.
! See http://factorcode.org/license.txt for BSD license.
USING: classes help.markup help.syntax io.streams.string kernel
quotations sequences strings multiline math ;
quotations sequences strings multiline math db.types ;
IN: db.tuples
HELP: define-persistent

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@ -3,7 +3,7 @@
USING: arrays assocs classes db kernel namespaces
classes.tuple words sequences slots math accessors
math.parser io prettyprint db.types continuations
destructors mirrors sets ;
destructors mirrors sets db.types ;
IN: db.tuples
<PRIVATE

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@ -1,6 +1,7 @@
! Copyright (C) 2008 Doug Coleman.
! See http://factorcode.org/license.txt for BSD license.
USING: classes hashtables help.markup help.syntax io.streams.string kernel sequences strings db.tuples math ;
USING: classes hashtables help.markup help.syntax io.streams.string
kernel sequences strings math ;
IN: db.types
HELP: +autoincrement+
@ -133,7 +134,7 @@ HELP: find-primary-key
{ $values
{ "specs" "an array of sql-specs" }
{ "obj" object } }
{ $description "Returns the row from the sql-specs array that was defined by " { $link define-persistent } "." }
{ $description "Returns the row from the sql-specs array." }
{ $notes "This is a low-level word." } ;
HELP: generator-bind