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Merge pull request #188 from larsmans/optimize 

Optimize queries
This commit is contained in:
mattn 2015-03-24 08:48:55 +09:00
parent 07f9c9c30f 4dfb2ecaf0
commit e28cd440fa
1 changed files with 23 additions and 19 deletions
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42
sqlite3.go
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@ -47,14 +47,23 @@ _sqlite3_bind_blob(sqlite3_stmt *stmt, int n, void *p, int np) {
#include <stdio.h>
#include <stdint.h>
static long
_sqlite3_last_insert_rowid(sqlite3* db) {
return (long) sqlite3_last_insert_rowid(db);
static int
_sqlite3_exec(sqlite3* db, const char* pcmd, long* rowid, long* changes)
{
int rv = sqlite3_exec(db, pcmd, 0, 0, 0);
*rowid = (long) sqlite3_last_insert_rowid(db);
*changes = (long) sqlite3_changes(db);
return rv;
}
static long
_sqlite3_changes(sqlite3* db) {
return (long) sqlite3_changes(db);
static int
_sqlite3_step(sqlite3_stmt* stmt, long* rowid, long* changes)
{
int rv = sqlite3_step(stmt);
sqlite3* db = sqlite3_db_handle(stmt);
*rowid = (long) sqlite3_last_insert_rowid(db);
*changes = (long) sqlite3_changes(db);
return rv;
}
*/
@ -232,14 +241,13 @@ func (c *SQLiteConn) Query(query string, args []driver.Value) (driver.Rows, erro
func (c *SQLiteConn) exec(cmd string) (driver.Result, error) {
pcmd := C.CString(cmd)
defer C.free(unsafe.Pointer(pcmd))
rv := C.sqlite3_exec(c.db, pcmd, nil, nil, nil)
var rowid, changes C.long
rv := C._sqlite3_exec(c.db, pcmd, &rowid, &changes)
if rv != C.SQLITE_OK {
return nil, c.lastError()
}
return &SQLiteResult{
int64(C._sqlite3_last_insert_rowid(c.db)),
int64(C._sqlite3_changes(c.db)),
}, nil
return &SQLiteResult{int64(rowid), int64(changes)}, nil
}
// Begin transaction.
@ -379,7 +387,7 @@ func (c *SQLiteConn) Prepare(query string) (driver.Stmt, error) {
return nil, c.lastError()
}
var t string
if tail != nil && C.strlen(tail) > 0 {
if tail != nil && *tail != '\000' {
t = strings.TrimSpace(C.GoString(tail))
}
nv := int(C.sqlite3_bind_parameter_count(s))
@ -509,19 +517,15 @@ func (s *SQLiteStmt) Exec(args []driver.Value) (driver.Result, error) {
C.sqlite3_clear_bindings(s.s)
return nil, err
}
rv := C.sqlite3_step(s.s)
var rowid, changes C.long
rv := C._sqlite3_step(s.s, &rowid, &changes)
if rv != C.SQLITE_ROW && rv != C.SQLITE_OK && rv != C.SQLITE_DONE {
err := s.c.lastError()
C.sqlite3_reset(s.s)
C.sqlite3_clear_bindings(s.s)
return nil, err
}
res := &SQLiteResult{
int64(C._sqlite3_last_insert_rowid(s.c.db)),
int64(C._sqlite3_changes(s.c.db)),
}
return res, nil
return &SQLiteResult{int64(rowid), int64(changes)}, nil
}
// Close the rows.