sqlite
Note: This is taken from the Chicken Wiki, where a more recent version could be available.
A library for using the SQLite database engine.
This extension is obsolete. Consider using sqlite3 instead.
Original code by Lars Rustemeier, with modifications by felix winkelmann.
None
This extension provides an interface for the SQLite relational database. Any errors triggered by the database system signal a composite condition of the exn and sqlite kinds.
<procedure>(sqlite:open FILENAME [BOOL])</procedure>
Opens the database FILENAME and returns a foreign pointer object representing the database in memory. If the file does not exist and the optional flag BOOL is false, a new database is created, otherwise an error is signaled.
<procedure>(sqlite:close DB)</procedure>
Closes the database represented by DB.
<procedure>(sqlite:execute DB QUERY)</procedure>
Executes the SQL command in the string QUERY for the database DB and returns a list of all returned rows, where each row is a vector containing strings (one for each column).
<procedure>(sqlite:iterator DB QUERY)</procedure>
Returns an iterator object from the database DB and the SQL command passed in the string QUERY.
<procedure>(sqlite:next ITERATOR)</procedure>
Returns a vector containing the columns of the next result row from the query represented by ITERATOR. If no more rows are available, #f is returned.
<procedure>(sqlite:finish ITERATOR)</procedure>
Frees up resources allocated by ITERATOR.
<procedure>(sqlite:call-with-query DB QUERY PROC)</procedure>
Calls the procedure PROC for each result-row returned by the SQL command QUERY with a vector containing the columns.
<procedure>(sqlite:iterator? X)</procedure>
Returns #t if X is an iterator object or #f otherwise.
Create a table of number pairs:
<example> <init>(use sqlite)</init> <expr> (define db (sqlite:open "foo.db"))
(sqlite:execute db "CREATE TABLE t1(a int, b int);")
(for-each
(lambda (i)
(sqlite:execute
db
(sprintf "INSERT INTO t1 VALUES(~A, ~A);" i (* i i)) ) )
(iota 10) )(sqlite:execute db "SELECT * FROM t1;") ; returns ; (#("0" "0") #("1" "1") #("2" "4") #("3" "9") #("4" "16") #("5" "25") #("6" "36") #("7" "49") #("8" "64") #("9" "81"))
(sqlite:call-with-query db "SELECT * FROM t1;" (compose print car vector→list)) ; prints: ; 0 ; 1 ; 4 ; 9 ; 16 ; 25 ; 36 ; 49 ; 64 ; 81
(sqlite:close db) ; cleaning up is always good. </expr> </example>
Copyright (c) 2000-2003, Lars Rustemeier and Felix L. Winkelmann
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