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570 lines
16 KiB
570 lines
16 KiB
/* This file is part of the KDE project
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Copyright (C) 2003-2006 Jaroslaw Staniek <js@iidea.pl>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this program; see the file COPYING. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include "sqlitecursor.h"
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#include "sqliteconnection.h"
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#include "sqliteconnection_p.h"
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#include <kexidb/error.h>
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#include <kexidb/driver.h>
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#include <kexiutils/utils.h>
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#include <assert.h>
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#include <string.h>
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#include <stdlib.h>
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#include <kdebug.h>
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#include <tdelocale.h>
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#include <tqptrvector.h>
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#include <tqdatetime.h>
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using namespace KexiDB;
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//! safer interpretations of boolean values for SQLite
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static bool sqliteStringToBool(const TQString& s)
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{
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return s.lower()=="yes" || (s.lower()!="no" && s!="0");
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}
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//----------------------------------------------------
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class KexiDB::SQLiteCursorData : public SQLiteConnectionInternal
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{
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public:
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SQLiteCursorData(Connection* conn)
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:
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SQLiteConnectionInternal(conn)
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// : curr_cols(0)
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// errmsg_p(0)
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// , res(SQLITE_OK)
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, curr_coldata(0)
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, curr_colname(0)
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, cols_pointers_mem_size(0)
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// , rec_stored(false)
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/* MOVED TO Cursor:
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, cols_pointers_mem_size(0)
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, records_in_buf(0)
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, buffering_completed(false)
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, at_buffer(false)*/
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//#ifdef SQLITE3
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// , rowDataReadyToFetch(false)
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//#endif
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{
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data_owned = false;
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}
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/*#ifdef SQLITE3
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void fetchRowDataIfNeeded()
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{
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if (!rowDataReadyToFetch)
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return true;
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rowDataReadyToFetch = false;
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m_fieldCount = sqlite3_data_count(data);
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for (int i=0; i<m_fieldCount; i++) {
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}
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}
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#endif*/
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TQCString st;
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//for sqlite:
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// sqlite_struct *data; //! taken from SQLiteConnection
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#ifdef SQLITE2
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sqlite_vm *prepared_st_handle; //vm
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#else //SQLITE3
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sqlite3_stmt *prepared_st_handle;
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#endif
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char *utail;
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// TQString errmsg; //<! server-specific message of last operation
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// char *errmsg_p; //<! temporary: server-specific message of last operation
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// int res; //<! result code of last operation on server
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// int curr_cols;
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const char **curr_coldata;
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const char **curr_colname;
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int next_cols;
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// const char **next_coldata;
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// const char **next_colname;
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// bool rec_stored : 1; //! true, current record is stored in next_coldata
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/* MOVED TO Cursor:
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uint cols_pointers_mem_size; //! size of record's array of pointers to values
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int records_in_buf; //! number of records currently stored in the buffer
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bool buffering_completed; //! true if we have already all records stored in the buffer
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TQPtrVector<const char*> records; //buffer data
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bool at_buffer; //! true if we already point to the buffer with curr_coldata
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*/
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/* int prev_cols;
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const char **prev_coldata;
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const char **prev_colname;*/
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uint cols_pointers_mem_size; //! size of record's array of pointers to values
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TQPtrVector<const char*> records;//! buffer data
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//#ifdef SQLITE3
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// bool rowDataReadyToFetch : 1;
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//#endif
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#ifdef SQLITE3
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inline TQVariant getValue(Field *f, int i)
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{
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int type = sqlite3_column_type(prepared_st_handle, i);
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if (type==SQLITE_NULL) {
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return TQVariant();
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}
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else if (!f || type==SQLITE_TEXT) {
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//TODO: support for UTF-16
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#define GET_sqlite3_column_text TQString::fromUtf8( (const char*)sqlite3_column_text(prepared_st_handle, i) )
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if (!f || f->isTextType())
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return GET_sqlite3_column_text;
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else {
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switch (f->type()) {
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case Field::Date:
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return TQDate::fromString( GET_sqlite3_column_text, Qt::ISODate );
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case Field::Time:
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//TQDateTime - a hack needed because TQVariant(TQTime) has broken isNull()
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return KexiUtils::stringToHackedTQTime(GET_sqlite3_column_text);
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case Field::DateTime: {
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TQString tmp( GET_sqlite3_column_text );
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tmp[10] = 'T'; //for ISODate compatibility
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return TQDateTime::fromString( tmp, Qt::ISODate );
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}
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case Field::Boolean:
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return TQVariant(sqliteStringToBool(GET_sqlite3_column_text), 1);
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default:
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return TQVariant(); //TODO
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}
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}
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}
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else if (type==SQLITE_INTEGER) {
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switch (f->type()) {
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case Field::Byte:
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case Field::ShortInteger:
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case Field::Integer:
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return TQVariant( sqlite3_column_int(prepared_st_handle, i) );
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case Field::BigInteger:
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return TQVariant( (TQ_LLONG)sqlite3_column_int64(prepared_st_handle, i) );
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case Field::Boolean:
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return TQVariant( sqlite3_column_int(prepared_st_handle, i)!=0, 1 );
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default:;
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}
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if (f->isFPNumericType()) //WEIRD, YEAH?
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return TQVariant( (double)sqlite3_column_int(prepared_st_handle, i) );
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else
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return TQVariant(); //TODO
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}
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else if (type==SQLITE_FLOAT) {
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if (f && f->isFPNumericType())
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return TQVariant( sqlite3_column_double(prepared_st_handle, i) );
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else if (!f || f->isIntegerType())
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return TQVariant( (double)sqlite3_column_double(prepared_st_handle, i) );
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else
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return TQVariant(); //TODO
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}
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else if (type==SQLITE_BLOB) {
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if (f && f->type()==Field::BLOB) {
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TQByteArray ba;
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//! @todo efficient enough?
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ba.duplicate((const char*)sqlite3_column_blob(prepared_st_handle, i),
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sqlite3_column_bytes(prepared_st_handle, i));
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return ba;
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} else
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return TQVariant(); //TODO
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}
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return TQVariant();
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}
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#endif //SQLITE3
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};
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SQLiteCursor::SQLiteCursor(Connection* conn, const TQString& statement, uint options)
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: Cursor( conn, statement, options )
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, d( new SQLiteCursorData(conn) )
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{
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d->data = static_cast<SQLiteConnection*>(conn)->d->data;
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}
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SQLiteCursor::SQLiteCursor(Connection* conn, QuerySchema& query, uint options )
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: Cursor( conn, query, options )
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, d( new SQLiteCursorData(conn) )
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{
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d->data = static_cast<SQLiteConnection*>(conn)->d->data;
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}
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SQLiteCursor::~SQLiteCursor()
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{
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close();
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delete d;
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}
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bool SQLiteCursor::drv_open()
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{
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// d->st.resize(statement.length()*2);
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//TODO: decode
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// d->st = statement.local8Bit();
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// d->st = m_conn->driver()->escapeString( statement.local8Bit() );
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if(! d->data) {
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// this may as example be the case if SQLiteConnection::drv_useDatabase()
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// wasn't called before. Normaly sqlite_compile/sqlite3_prepare
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// should handle it, but it crashes in in sqlite3SafetyOn at util.c:786
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kdWarning() << "SQLiteCursor::drv_open(): Database handle undefined." << endl;
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return false;
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}
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#ifdef SQLITE2
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d->st = m_sql.local8Bit();
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d->res = sqlite_compile(
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d->data,
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d->st.data(),
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(const char**)&d->utail,
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&d->prepared_st_handle,
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&d->errmsg_p );
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#else //SQLITE3
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d->st = m_sql.utf8();
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d->res = sqlite3_prepare(
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d->data, /* Database handle */
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d->st.data(), /* SQL statement, UTF-8 encoded */
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d->st.length(), /* Length of zSql in bytes. */
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&d->prepared_st_handle, /* OUT: Statement handle */
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0/*const char **pzTail*/ /* OUT: Pointer to unused portion of zSql */
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);
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#endif
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if (d->res!=SQLITE_OK) {
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d->storeResult();
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return false;
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}
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//cursor is automatically @ first record
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// m_beforeFirst = true;
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if (isBuffered()) {
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d->records.resize(128); //TODO: manage size dynamically
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}
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return true;
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}
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/*bool SQLiteCursor::drv_getFirstRecord()
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{
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bool ok = drv_getNextRecord();*/
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/* if ((m_options & Buffered) && ok) { //1st record is there:
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//compute parameters for cursor's buffer:
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//-size of record's array of pointer to values
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d->cols_pointers_mem_size = d->curr_cols * sizeof(char*);
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d->records_in_buf = 1;
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}*/
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/*return ok;
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}*/
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bool SQLiteCursor::drv_close()
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{
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#ifdef SQLITE2
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d->res = sqlite_finalize( d->prepared_st_handle, &d->errmsg_p );
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#else //SQLITE3
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d->res = sqlite3_finalize( d->prepared_st_handle );
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#endif
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if (d->res!=SQLITE_OK) {
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d->storeResult();
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return false;
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}
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return true;
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}
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void SQLiteCursor::drv_getNextRecord()
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{
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#ifdef SQLITE2
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static int _fieldCount;
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d->res = sqlite_step(
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d->prepared_st_handle,
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&_fieldCount,
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&d->curr_coldata,
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&d->curr_colname);
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#else //SQLITE3
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d->res = sqlite3_step( d->prepared_st_handle );
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#endif
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if (d->res == SQLITE_ROW) {
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m_result = FetchOK;
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#ifdef SQLITE2
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m_fieldCount = (uint)_fieldCount;
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#else
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m_fieldCount = sqlite3_data_count(d->prepared_st_handle);
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//#else //for SQLITE3 data fetching is delayed. Now we even do not take field count information
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// // -- just set a flag that we've a data not fetched but available
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// d->rowDataReadyToFetch = true;
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#endif
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//(m_logicalFieldCount introduced) m_fieldCount -= (m_containsROWIDInfo ? 1 : 0);
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} else {
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//#ifdef SQLITE3
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// d->rowDataReadyToFetch = false;
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//#endif
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if (d->res==SQLITE_DONE)
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m_result = FetchEnd;
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else
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m_result = FetchError;
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}
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//debug
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/* if (((int)m_result == (int)FetchOK) && d->curr_coldata) {
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for (uint i=0;i<m_fieldCount;i++) {
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KexiDBDrvDbg<<"col."<< i<<": "<< d->curr_colname[i]<<" "<< d->curr_colname[m_fieldCount+i]
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<< " = " << (d->curr_coldata[i] ? TQString::fromLocal8Bit(d->curr_coldata[i]) : "(NULL)") <<endl;
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}
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KexiDBDrvDbg << "SQLiteCursor::drv_getNextRecord(): "<<m_fieldCount<<" col(s) fetched"<<endl;
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}*/
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}
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void SQLiteCursor::drv_appendCurrentRecordToBuffer()
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{
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// KexiDBDrvDbg << "SQLiteCursor::drv_appendCurrentRecordToBuffer():" <<endl;
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if (!d->curr_coldata)
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return;
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if (!d->cols_pointers_mem_size)
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d->cols_pointers_mem_size = m_fieldCount * sizeof(char*);
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const char **record = (const char**)malloc(d->cols_pointers_mem_size);
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const char **src_col = d->curr_coldata;
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const char **dest_col = record;
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for (uint i=0; i<m_fieldCount; i++,src_col++,dest_col++) {
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// KexiDBDrvDbg << i <<": '" << *src_col << "'" <<endl;
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// KexiDBDrvDbg << "src_col: " << src_col << endl;
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*dest_col = *src_col ? strdup(*src_col) : 0;
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}
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d->records.insert(m_records_in_buf,record);
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// KexiDBDrvDbg << "SQLiteCursor::drv_appendCurrentRecordToBuffer() ok." <<endl;
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}
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void SQLiteCursor::drv_bufferMovePointerNext()
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{
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d->curr_coldata++; //move to next record in the buffer
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}
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void SQLiteCursor::drv_bufferMovePointerPrev()
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{
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d->curr_coldata--; //move to prev record in the buffer
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}
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//compute a place in the buffer that contain next record's data
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//and move internal buffer pointer to that place
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void SQLiteCursor::drv_bufferMovePointerTo(TQ_LLONG at)
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{
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d->curr_coldata = d->records.at(at);
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}
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void SQLiteCursor::drv_clearBuffer()
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{
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if (d->cols_pointers_mem_size>0) {
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const uint records_in_buf = m_records_in_buf;
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const char ***r_ptr = d->records.data();
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for (uint i=0; i<records_in_buf; i++, r_ptr++) {
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// const char **record = m_records.at(i);
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const char **field_data = *r_ptr;
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// for (int col=0; col<d->curr_cols; col++, field_data++) {
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for (uint col=0; col<m_fieldCount; col++, field_data++) {
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free((void*)*field_data); //free field memory
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}
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free(*r_ptr); //free pointers to fields array
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}
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}
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// d->curr_cols=0;
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// m_fieldCount=0;
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m_records_in_buf=0;
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d->cols_pointers_mem_size=0;
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// m_at_buffer=false;
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d->records.clear();
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}
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/*
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void SQLiteCursor::drv_storeCurrentRecord()
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{
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#if 0
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assert(!m_data->rec_stored);
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m_data->rec_stored = true;
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m_data->next_cols = m_data->curr_cols;
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for (int i=0;i<m_data->curr_cols;i++) {
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KexiDBDrvDbg<<"[COPY] "<<i<<": "<< m_data->curr_coldata[i]<<endl;
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if (m_data->curr_coldata[i])
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m_data->next_coldata[i] = strdup( m_data->curr_coldata[i] );
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else
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m_data->next_coldata[i] = 0;
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}
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#endif
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}
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*/
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/*TODO
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const char *** SQLiteCursor::bufferData()
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{
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if (!isBuffered())
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return 0;
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return m_records.data();
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}*/
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const char ** SQLiteCursor::rowData() const
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{
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return d->curr_coldata;
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}
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void SQLiteCursor::storeCurrentRow(RowData &data) const
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{
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#ifdef SQLITE2
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const char **col = d->curr_coldata;
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#endif
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//const uint realCount = m_fieldCount + (m_containsROWIDInfo ? 1 : 0);
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data.resize(m_fieldCount);
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if (!m_fieldsExpanded) {//simple version: without types
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for( uint i=0; i<m_fieldCount; i++ ) {
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#ifdef SQLITE2
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data[i] = TQVariant( *col );
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col++;
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#else //SQLITE3
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data[i] = TQString::fromUtf8( (const char*)sqlite3_column_text(d->prepared_st_handle, i) );
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#endif
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}
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return;
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}
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//const uint fieldsExpandedCount = m_fieldsExpanded->count();
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const uint maxCount = TQMIN(m_fieldCount, m_fieldsExpanded->count());
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// i - visible field's index, j - physical index
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for( uint i=0, j=0; i<m_fieldCount; i++, j++ ) {
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// while (j < m_detailedVisibility.count() && !m_detailedVisibility[j]) //!m_query->isColumnVisible(j))
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// j++;
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while (j < maxCount && !m_fieldsExpanded->at(j)->visible)
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j++;
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if (j >= (maxCount /*+(m_containsROWIDInfo ? 1 : 0)*/)) {
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//ERR!
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break;
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}
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//(m_logicalFieldCount introduced) Field *f = (m_containsROWIDInfo && i>=m_fieldCount) ? 0 : m_fieldsExpanded->at(j)->field;
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Field *f = (i>=m_fieldCount) ? 0 : m_fieldsExpanded->at(j)->field;
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// KexiDBDrvDbg << "SQLiteCursor::storeCurrentRow(): col=" << (col ? *col : 0) << endl;
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#ifdef SQLITE2
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if (!*col)
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data[i] = TQVariant();
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else if (f && f->isTextType())
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# ifdef SQLITE_UTF8
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data[i] = TQString::fromUtf8( *col );
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# else
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data[i] = TQVariant( *col ); //only latin1
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# endif
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else if (f && f->isFPNumericType())
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data[i] = TQVariant( TQCString(*col).toDouble() );
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else {
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switch (f ? f->type() : Field::Integer/*ROWINFO*/) {
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//todo: use short, etc.
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case Field::Byte:
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case Field::ShortInteger:
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case Field::Integer:
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data[i] = TQVariant( TQCString(*col).toInt() );
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case Field::BigInteger:
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data[i] = TQVariant( TQString::fromLatin1(*col).toLongLong() );
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case Field::Boolean:
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data[i] = TQVariant( sqliteStringToBool(TQString::fromLatin1(*col)), 1 );
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break;
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case Field::Date:
|
|
data[i] = TQDate::fromString( TQString::fromLatin1(*col), Qt::ISODate );
|
|
break;
|
|
case Field::Time:
|
|
//TQDateTime - a hack needed because TQVariant(TQTime) has broken isNull()
|
|
data[i] = KexiUtils::stringToHackedTQTime(TQString::fromLatin1(*col));
|
|
break;
|
|
case Field::DateTime: {
|
|
TQString tmp( TQString::fromLatin1(*col) );
|
|
tmp[10] = 'T';
|
|
data[i] = TQDateTime::fromString( tmp, Qt::ISODate );
|
|
break;
|
|
}
|
|
default:
|
|
data[i] = TQVariant( *col );
|
|
}
|
|
}
|
|
|
|
col++;
|
|
#else //SQLITE3
|
|
data[i] = d->getValue(f, i); //, !f /*!f means ROWID*/);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
TQVariant SQLiteCursor::value(uint i)
|
|
{
|
|
// if (i > (m_fieldCount-1+(m_containsROWIDInfo?1:0))) //range checking
|
|
if (i > (m_fieldCount-1)) //range checking
|
|
return TQVariant();
|
|
//TODO: allow disable range checking! - performance reasons
|
|
// const KexiDB::Field *f = m_query ? m_query->field(i) : 0;
|
|
KexiDB::Field *f = (m_fieldsExpanded && i<m_fieldsExpanded->count())
|
|
? m_fieldsExpanded->at(i)->field : 0;
|
|
#ifdef SQLITE2
|
|
//from most to least frequently used types:
|
|
//(m_logicalFieldCount introduced) if (i==m_fieldCount || f && f->isIntegerType())
|
|
if (!f || f->isIntegerType())
|
|
return TQVariant( TQCString(d->curr_coldata[i]).toInt() );
|
|
else if (!f || f->isTextType())
|
|
return TQVariant( d->curr_coldata[i] );
|
|
else if (f->isFPNumericType())
|
|
return TQVariant( TQCString(d->curr_coldata[i]).toDouble() );
|
|
|
|
return TQVariant( d->curr_coldata[i] ); //default
|
|
#else
|
|
return d->getValue(f, i); //, i==m_logicalFieldCount/*ROWID*/);
|
|
#endif
|
|
}
|
|
|
|
/*! Stores string value taken from field number \a i to \a str.
|
|
\return false when range checking failed.
|
|
bool SQLiteCursor::storeStringValue(uint i, TQString &str)
|
|
{
|
|
if (i > (m_fieldCount-1)) //range checking
|
|
return false;
|
|
str = d->curr_coldata[i];
|
|
return true;
|
|
}*/
|
|
|
|
int SQLiteCursor::serverResult()
|
|
{
|
|
return d->res;
|
|
}
|
|
|
|
TQString SQLiteCursor::serverResultName()
|
|
{
|
|
#ifdef SQLITE2
|
|
return TQString::fromLatin1( sqlite_error_string(d->res) );
|
|
#else //SQLITE3
|
|
return TQString::fromLatin1( d->result_name );
|
|
#endif
|
|
}
|
|
|
|
TQString SQLiteCursor::serverErrorMsg()
|
|
{
|
|
return d->errmsg;
|
|
}
|
|
|
|
void SQLiteCursor::drv_clearServerResult()
|
|
{
|
|
d->res = SQLITE_OK;
|
|
d->errmsg_p = 0;
|
|
}
|
|
|