From 0b60f71cb853b35e53d0b407493dbcfc098ed40e Mon Sep 17 00:00:00 2001 From: tobigun Date: Tue, 19 Oct 2010 16:39:31 +0000 Subject: initial commit git-svn-id: svn://svn.code.sf.net/p/ultrastardx/svn/branches/experimental@2684 b956fd51-792f-4845-bead-9b4dfca2ff2c --- mediaplugin/src/lib/SQLite/SQLite3.pas | 253 ++++ mediaplugin/src/lib/SQLite/SQLiteTable3.pas | 1500 ++++++++++++++++++++ mediaplugin/src/lib/SQLite/example/Sunset.jpg | Bin 0 -> 71189 bytes mediaplugin/src/lib/SQLite/example/TestSqlite.dpr | 15 + mediaplugin/src/lib/SQLite/example/TestSqlite.res | Bin 0 -> 876 bytes mediaplugin/src/lib/SQLite/example/uTestSqlite.dfm | 110 ++ mediaplugin/src/lib/SQLite/example/uTestSqlite.pas | 233 +++ mediaplugin/src/lib/SQLite/readme.txt | 93 ++ 8 files changed, 2204 insertions(+) create mode 100644 mediaplugin/src/lib/SQLite/SQLite3.pas create mode 100644 mediaplugin/src/lib/SQLite/SQLiteTable3.pas create mode 100644 mediaplugin/src/lib/SQLite/example/Sunset.jpg create mode 100644 mediaplugin/src/lib/SQLite/example/TestSqlite.dpr create mode 100644 mediaplugin/src/lib/SQLite/example/TestSqlite.res create mode 100644 mediaplugin/src/lib/SQLite/example/uTestSqlite.dfm create mode 100644 mediaplugin/src/lib/SQLite/example/uTestSqlite.pas create mode 100644 mediaplugin/src/lib/SQLite/readme.txt (limited to 'mediaplugin/src/lib/SQLite') diff --git a/mediaplugin/src/lib/SQLite/SQLite3.pas b/mediaplugin/src/lib/SQLite/SQLite3.pas new file mode 100644 index 00000000..7b7207c4 --- /dev/null +++ b/mediaplugin/src/lib/SQLite/SQLite3.pas @@ -0,0 +1,253 @@ +unit SQLite3; + +{ + Simplified interface for SQLite. + Updated for Sqlite 3 by Tim Anderson (tim@itwriting.com) + Note: NOT COMPLETE for version 3, just minimal functionality + Adapted from file created by Pablo Pissanetzky (pablo@myhtpc.net) + which was based on SQLite.pas by Ben Hochstrasser (bhoc@surfeu.ch) +} + +{$IFDEF FPC} + {$MODE DELPHI} + {$H+} (* use long strings *) + {$PACKENUM 4} (* use 4-byte enums *) + {$PACKRECORDS C} (* C/C++-compatible record packing *) +{$ELSE} + {$MINENUMSIZE 4} (* use 4-byte enums *) +{$ENDIF} + +interface + +const +{$IF Defined(MSWINDOWS)} + SQLiteDLL = 'sqlite3.dll'; +{$ELSEIF Defined(DARWIN)} + SQLiteDLL = 'libsqlite3.dylib'; + {$linklib libsqlite3} +{$ELSEIF Defined(UNIX)} + SQLiteDLL = 'sqlite3.so'; +{$IFEND} + +// Return values for sqlite3_exec() and sqlite3_step() + +const + SQLITE_OK = 0; // Successful result + (* beginning-of-error-codes *) + SQLITE_ERROR = 1; // SQL error or missing database + SQLITE_INTERNAL = 2; // An internal logic error in SQLite + SQLITE_PERM = 3; // Access permission denied + SQLITE_ABORT = 4; // Callback routine requested an abort + SQLITE_BUSY = 5; // The database file is locked + SQLITE_LOCKED = 6; // A table in the database is locked + SQLITE_NOMEM = 7; // A malloc() failed + SQLITE_READONLY = 8; // Attempt to write a readonly database + SQLITE_INTERRUPT = 9; // Operation terminated by sqlite3_interrupt() + SQLITE_IOERR = 10; // Some kind of disk I/O error occurred + SQLITE_CORRUPT = 11; // The database disk image is malformed + SQLITE_NOTFOUND = 12; // (Internal Only) Table or record not found + SQLITE_FULL = 13; // Insertion failed because database is full + SQLITE_CANTOPEN = 14; // Unable to open the database file + SQLITE_PROTOCOL = 15; // Database lock protocol error + SQLITE_EMPTY = 16; // Database is empty + SQLITE_SCHEMA = 17; // The database schema changed + SQLITE_TOOBIG = 18; // Too much data for one row of a table + SQLITE_CONSTRAINT = 19; // Abort due to contraint violation + SQLITE_MISMATCH = 20; // Data type mismatch + SQLITE_MISUSE = 21; // Library used incorrectly + SQLITE_NOLFS = 22; // Uses OS features not supported on host + SQLITE_AUTH = 23; // Authorization denied + SQLITE_FORMAT = 24; // Auxiliary database format error + SQLITE_RANGE = 25; // 2nd parameter to sqlite3_bind out of range + SQLITE_NOTADB = 26; // File opened that is not a database file + SQLITE_ROW = 100; // sqlite3_step() has another row ready + SQLITE_DONE = 101; // sqlite3_step() has finished executing + + SQLITE_INTEGER = 1; + SQLITE_FLOAT = 2; + SQLITE_TEXT = 3; + SQLITE_BLOB = 4; + SQLITE_NULL = 5; + + SQLITE_UTF8 = 1; + SQLITE_UTF16 = 2; + SQLITE_UTF16BE = 3; + SQLITE_UTF16LE = 4; + SQLITE_ANY = 5; + + SQLITE_STATIC {: TSQLite3Destructor} = Pointer(0); + SQLITE_TRANSIENT {: TSQLite3Destructor} = Pointer(-1); + +type + TSQLiteDB = Pointer; + TSQLiteResult = ^PAnsiChar; + TSQLiteStmt = Pointer; + +type + PPAnsiCharArray = ^TPAnsiCharArray; + TPAnsiCharArray = array[0 .. (MaxInt div SizeOf(PAnsiChar))-1] of PAnsiChar; + +type + TSQLiteExecCallback = function(UserData: Pointer; NumCols: integer; ColValues: + PPAnsiCharArray; ColNames: PPAnsiCharArray): integer; cdecl; + TSQLiteBusyHandlerCallback = function(UserData: Pointer; P2: integer): integer; cdecl; + + //function prototype for define own collate + TCollateXCompare = function(UserData: pointer; Buf1Len: integer; Buf1: pointer; + Buf2Len: integer; Buf2: pointer): integer; cdecl; + + +function SQLite3_Open(filename: PAnsiChar; out db: TSQLiteDB): integer; cdecl; external SQLiteDLL name 'sqlite3_open'; +function SQLite3_Close(db: TSQLiteDB): integer; cdecl; external SQLiteDLL name 'sqlite3_close'; +function SQLite3_Exec(db: TSQLiteDB; SQLStatement: PAnsiChar; CallbackPtr: TSQLiteExecCallback; UserData: Pointer; var ErrMsg: PAnsiChar): integer; cdecl; external SQLiteDLL name 'sqlite3_exec'; +function SQLite3_Version(): PAnsiChar; cdecl; external SQLiteDLL name 'sqlite3_libversion'; +function SQLite3_ErrMsg(db: TSQLiteDB): PAnsiChar; cdecl; external SQLiteDLL name 'sqlite3_errmsg'; +function SQLite3_ErrCode(db: TSQLiteDB): integer; cdecl; external SQLiteDLL name 'sqlite3_errcode'; +procedure SQlite3_Free(P: PAnsiChar); cdecl; external SQLiteDLL name 'sqlite3_free'; +function SQLite3_GetTable(db: TSQLiteDB; SQLStatement: PAnsiChar; var ResultPtr: TSQLiteResult; var RowCount: Cardinal; var ColCount: Cardinal; var ErrMsg: PAnsiChar): integer; cdecl; external SQLiteDLL name 'sqlite3_get_table'; +procedure SQLite3_FreeTable(Table: TSQLiteResult); cdecl; external SQLiteDLL name 'sqlite3_free_table'; +function SQLite3_Complete(P: PAnsiChar): boolean; cdecl; external SQLiteDLL name 'sqlite3_complete'; +function SQLite3_LastInsertRowID(db: TSQLiteDB): int64; cdecl; external SQLiteDLL name 'sqlite3_last_insert_rowid'; +procedure SQLite3_Interrupt(db: TSQLiteDB); cdecl; external SQLiteDLL name 'sqlite3_interrupt'; +procedure SQLite3_BusyHandler(db: TSQLiteDB; CallbackPtr: TSQLiteBusyHandlerCallback; UserData: Pointer); cdecl; external SQLiteDLL name 'sqlite3_busy_handler'; +procedure SQLite3_BusyTimeout(db: TSQLiteDB; TimeOut: integer); cdecl; external SQLiteDLL name 'sqlite3_busy_timeout'; +function SQLite3_Changes(db: TSQLiteDB): integer; cdecl; external SQLiteDLL name 'sqlite3_changes'; +function SQLite3_TotalChanges(db: TSQLiteDB): integer; cdecl; external SQLiteDLL name 'sqlite3_total_changes'; +function SQLite3_Prepare(db: TSQLiteDB; SQLStatement: PAnsiChar; nBytes: integer; out hStmt: TSqliteStmt; out pzTail: PAnsiChar): integer; cdecl; external SQLiteDLL name 'sqlite3_prepare'; +function SQLite3_Prepare_v2(db: TSQLiteDB; SQLStatement: PAnsiChar; nBytes: integer; out hStmt: TSqliteStmt; out pzTail: PAnsiChar): integer; cdecl; external SQLiteDLL name 'sqlite3_prepare_v2'; +function SQLite3_ColumnCount(hStmt: TSqliteStmt): integer; cdecl; external SQLiteDLL name 'sqlite3_column_count'; +function SQLite3_ColumnName(hStmt: TSqliteStmt; ColNum: integer): PAnsiChar; cdecl; external SQLiteDLL name 'sqlite3_column_name'; +function SQLite3_ColumnDeclType(hStmt: TSqliteStmt; ColNum: integer): PAnsiChar; cdecl; external SQLiteDLL name 'sqlite3_column_decltype'; +function SQLite3_Step(hStmt: TSqliteStmt): integer; cdecl; external SQLiteDLL name 'sqlite3_step'; +function SQLite3_DataCount(hStmt: TSqliteStmt): integer; cdecl; external SQLiteDLL name 'sqlite3_data_count'; + +function SQLite3_ColumnBlob(hStmt: TSqliteStmt; ColNum: integer): pointer; cdecl; external SQLiteDLL name 'sqlite3_column_blob'; +function SQLite3_ColumnBytes(hStmt: TSqliteStmt; ColNum: integer): integer; cdecl; external SQLiteDLL name 'sqlite3_column_bytes'; +function SQLite3_ColumnDouble(hStmt: TSqliteStmt; ColNum: integer): double; cdecl; external SQLiteDLL name 'sqlite3_column_double'; +function SQLite3_ColumnInt(hStmt: TSqliteStmt; ColNum: integer): integer; cdecl; external SQLiteDLL name 'sqlite3_column_int'; +function SQLite3_ColumnText(hStmt: TSqliteStmt; ColNum: integer): PAnsiChar; cdecl; external SQLiteDLL name 'sqlite3_column_text'; +function SQLite3_ColumnType(hStmt: TSqliteStmt; ColNum: integer): integer; cdecl; external SQLiteDLL name 'sqlite3_column_type'; +function SQLite3_ColumnInt64(hStmt: TSqliteStmt; ColNum: integer): Int64; cdecl; external SQLiteDLL name 'sqlite3_column_int64'; +function SQLite3_Finalize(hStmt: TSqliteStmt): integer; cdecl; external SQLiteDLL name 'sqlite3_finalize'; +function SQLite3_Reset(hStmt: TSqliteStmt): integer; cdecl; external SQLiteDLL name 'sqlite3_reset'; + +// +// In the SQL strings input to sqlite3_prepare() and sqlite3_prepare16(), +// one or more literals can be replace by a wildcard "?" or ":N:" where +// N is an integer. These value of these wildcard literals can be set +// using the routines listed below. +// +// In every case, the first parameter is a pointer to the sqlite3_stmt +// structure returned from sqlite3_prepare(). The second parameter is the +// index of the wildcard. The first "?" has an index of 1. ":N:" wildcards +// use the index N. +// +// The fifth parameter to sqlite3_bind_blob(), sqlite3_bind_text(), and +//sqlite3_bind_text16() is a destructor used to dispose of the BLOB or +//text after SQLite has finished with it. If the fifth argument is the +// special value SQLITE_STATIC, then the library assumes that the information +// is in static, unmanaged space and does not need to be freed. If the +// fifth argument has the value SQLITE_TRANSIENT, then SQLite makes its +// own private copy of the data. +// +// The sqlite3_bind_* routine must be called before sqlite3_step() after +// an sqlite3_prepare() or sqlite3_reset(). Unbound wildcards are interpreted +// as NULL. +// + +type + TSQLite3Destructor = procedure(Ptr: Pointer); cdecl; + +function sqlite3_bind_blob(hStmt: TSqliteStmt; ParamNum: integer; + ptrData: pointer; numBytes: integer; ptrDestructor: TSQLite3Destructor): integer; +cdecl; external SQLiteDLL name 'sqlite3_bind_blob'; +function sqlite3_bind_text(hStmt: TSqliteStmt; ParamNum: integer; + Text: PAnsiChar; numBytes: integer; ptrDestructor: TSQLite3Destructor): integer; +cdecl; external SQLiteDLL name 'sqlite3_bind_text'; +function sqlite3_bind_double(hStmt: TSqliteStmt; ParamNum: integer; Data: Double): integer; + cdecl; external SQLiteDLL name 'sqlite3_bind_double'; +function sqlite3_bind_int(hStmt: TSqLiteStmt; ParamNum: integer; Data: integer): integer; + cdecl; external SQLiteDLL name 'sqlite3_bind_int'; +function sqlite3_bind_int64(hStmt: TSqliteStmt; ParamNum: integer; Data: int64): integer; + cdecl; external SQLiteDLL name 'sqlite3_bind_int64'; +function sqlite3_bind_null(hStmt: TSqliteStmt; ParamNum: integer): integer; + cdecl; external SQLiteDLL name 'sqlite3_bind_null'; + +function sqlite3_bind_parameter_index(hStmt: TSqliteStmt; zName: PAnsiChar): integer; + cdecl; external SQLiteDLL name 'sqlite3_bind_parameter_index'; + +function sqlite3_enable_shared_cache(Value: integer): integer; cdecl; external SQLiteDLL name 'sqlite3_enable_shared_cache'; + +//user collate definiton +function SQLite3_create_collation(db: TSQLiteDB; Name: PAnsiChar; eTextRep: integer; + UserData: pointer; xCompare: TCollateXCompare): integer; cdecl; external SQLiteDLL name 'sqlite3_create_collation'; + +function SQLiteFieldType(SQLiteFieldTypeCode: Integer): AnsiString; +function SQLiteErrorStr(SQLiteErrorCode: Integer): AnsiString; + +implementation + +uses + SysUtils; + +function SQLiteFieldType(SQLiteFieldTypeCode: Integer): AnsiString; +begin + case SQLiteFieldTypeCode of + SQLITE_INTEGER: Result := 'Integer'; + SQLITE_FLOAT: Result := 'Float'; + SQLITE_TEXT: Result := 'Text'; + SQLITE_BLOB: Result := 'Blob'; + SQLITE_NULL: Result := 'Null'; + else + Result := 'Unknown SQLite Field Type Code "' + IntToStr(SQLiteFieldTypeCode) + '"'; + end; +end; + +function SQLiteErrorStr(SQLiteErrorCode: Integer): AnsiString; +begin + case SQLiteErrorCode of + SQLITE_OK: Result := 'Successful result'; + SQLITE_ERROR: Result := 'SQL error or missing database'; + SQLITE_INTERNAL: Result := 'An internal logic error in SQLite'; + SQLITE_PERM: Result := 'Access permission denied'; + SQLITE_ABORT: Result := 'Callback routine requested an abort'; + SQLITE_BUSY: Result := 'The database file is locked'; + SQLITE_LOCKED: Result := 'A table in the database is locked'; + SQLITE_NOMEM: Result := 'A malloc() failed'; + SQLITE_READONLY: Result := 'Attempt to write a readonly database'; + SQLITE_INTERRUPT: Result := 'Operation terminated by sqlite3_interrupt()'; + SQLITE_IOERR: Result := 'Some kind of disk I/O error occurred'; + SQLITE_CORRUPT: Result := 'The database disk image is malformed'; + SQLITE_NOTFOUND: Result := '(Internal Only) Table or record not found'; + SQLITE_FULL: Result := 'Insertion failed because database is full'; + SQLITE_CANTOPEN: Result := 'Unable to open the database file'; + SQLITE_PROTOCOL: Result := 'Database lock protocol error'; + SQLITE_EMPTY: Result := 'Database is empty'; + SQLITE_SCHEMA: Result := 'The database schema changed'; + SQLITE_TOOBIG: Result := 'Too much data for one row of a table'; + SQLITE_CONSTRAINT: Result := 'Abort due to contraint violation'; + SQLITE_MISMATCH: Result := 'Data type mismatch'; + SQLITE_MISUSE: Result := 'Library used incorrectly'; + SQLITE_NOLFS: Result := 'Uses OS features not supported on host'; + SQLITE_AUTH: Result := 'Authorization denied'; + SQLITE_FORMAT: Result := 'Auxiliary database format error'; + SQLITE_RANGE: Result := '2nd parameter to sqlite3_bind out of range'; + SQLITE_NOTADB: Result := 'File opened that is not a database file'; + SQLITE_ROW: Result := 'sqlite3_step() has another row ready'; + SQLITE_DONE: Result := 'sqlite3_step() has finished executing'; + else + Result := 'Unknown SQLite Error Code "' + IntToStr(SQLiteErrorCode) + '"'; + end; +end; + +function ColValueToStr(Value: PAnsiChar): AnsiString; +begin + if (Value = nil) then + Result := 'NULL' + else + Result := Value; +end; + + +end. + diff --git a/mediaplugin/src/lib/SQLite/SQLiteTable3.pas b/mediaplugin/src/lib/SQLite/SQLiteTable3.pas new file mode 100644 index 00000000..3aed54a4 --- /dev/null +++ b/mediaplugin/src/lib/SQLite/SQLiteTable3.pas @@ -0,0 +1,1500 @@ +unit SQLiteTable3; + +{ + Simple classes for using SQLite's exec and get_table. + + TSQLiteDatabase wraps the calls to open and close an SQLite database. + It also wraps SQLite_exec for queries that do not return a result set + + TSQLiteTable wraps execution of SQL query. + It run query and read all returned rows to internal buffer. + It allows accessing fields by name as well as index and can move through a + result set forward and backwards, or randomly to any row. + + TSQLiteUniTable wraps execution of SQL query. + It run query as TSQLiteTable, but reading just first row only! + You can step to next row (until not EOF) by 'Next' method. + You cannot step backwards! (So, it is called as UniDirectional result set.) + It not using any internal buffering, this class is very close to Sqlite API. + It allows accessing fields by name as well as index on actual row only. + Very good and fast for sequentional scanning of large result sets with minimal + memory footprint. + + Warning! Do not close TSQLiteDatabase before any TSQLiteUniTable, + because query is closed on TSQLiteUniTable destructor and database connection + is used during TSQLiteUniTable live! + + SQL parameter usage: + You can add named parameter values by call set of AddParam* methods. + Parameters will be used for first next SQL statement only. + Parameter name must be prefixed by ':', '$' or '@' and same prefix must be + used in SQL statement! + Sample: + table.AddParamText(':str', 'some value'); + s := table.GetTableString('SELECT value FROM sometable WHERE id=:str'); + + Notes from Andrew Retmanski on prepared queries + The changes are as follows: + + SQLiteTable3.pas + - Added new boolean property Synchronised (this controls the SYNCHRONOUS pragma as I found that turning this OFF increased the write performance in my application) + - Added new type TSQLiteQuery (this is just a simple record wrapper around the SQL string and a TSQLiteStmt pointer) + - Added PrepareSQL method to prepare SQL query - returns TSQLiteQuery + - Added ReleaseSQL method to release previously prepared query + - Added overloaded BindSQL methods for Integer and String types - these set new values for the prepared query parameters + - Added overloaded ExecSQL method to execute a prepared TSQLiteQuery + + Usage of the new methods should be self explanatory but the process is in essence: + + 1. Call PrepareSQL to return TSQLiteQuery 2. Call BindSQL for each parameter in the prepared query 3. Call ExecSQL to run the prepared query 4. Repeat steps 2 & 3 as required 5. Call ReleaseSQL to free SQLite resources + + One other point - the Synchronised property throws an error if used inside a transaction. + + Acknowledments + Adapted by Tim Anderson (tim@itwriting.com) + Originally created by Pablo Pissanetzky (pablo@myhtpc.net) + Modified and enhanced by Lukas Gebauer + Modified and enhanced by Tobias Gunkel +} + +interface + +{$IFDEF FPC} + {$MODE Delphi}{$H+} +{$ENDIF} + +uses + {$IFDEF MSWINDOWS} + Windows, + {$ENDIF} + SQLite3, Classes, SysUtils; + +const + + dtInt = 1; + dtNumeric = 2; + dtStr = 3; + dtBlob = 4; + dtNull = 5; + +type + + ESQLiteException = class(Exception) + end; + + TSQliteParam = class + public + name: string; + valuetype: integer; + valueinteger: int64; + valuefloat: double; + valuedata: string; + end; + + THookQuery = procedure(Sender: TObject; SQL: String) of object; + + TSQLiteQuery = record + SQL: String; + Statement: TSQLiteStmt; + end; + + TSQLiteTable = class; + TSQLiteUniTable = class; + + TSQLiteDatabase = class + private + fDB: TSQLiteDB; + fInTrans: boolean; + fSync: boolean; + fParams: TList; + FOnQuery: THookQuery; + procedure RaiseError(s: string; SQL: string); + procedure SetParams(Stmt: TSQLiteStmt); + procedure BindData(Stmt: TSQLiteStmt; const Bindings: array of const); + function GetRowsChanged: integer; + protected + procedure SetSynchronised(Value: boolean); + procedure DoQuery(value: string); + public + constructor Create(const FileName: string); + destructor Destroy; override; + function GetTable(const SQL: Ansistring): TSQLiteTable; overload; + function GetTable(const SQL: Ansistring; const Bindings: array of const): TSQLiteTable; overload; + procedure ExecSQL(const SQL: Ansistring); overload; + procedure ExecSQL(const SQL: Ansistring; const Bindings: array of const); overload; + procedure ExecSQL(Query: TSQLiteQuery); overload; + function PrepareSQL(const SQL: Ansistring): TSQLiteQuery; + procedure BindSQL(Query: TSQLiteQuery; const Index: Integer; const Value: Integer); overload; + procedure BindSQL(Query: TSQLiteQuery; const Index: Integer; const Value: String); overload; + procedure ReleaseSQL(Query: TSQLiteQuery); + function GetUniTable(const SQL: Ansistring): TSQLiteUniTable; overload; + function GetUniTable(const SQL: Ansistring; const Bindings: array of const): TSQLiteUniTable; overload; + function GetTableValue(const SQL: Ansistring): int64; overload; + function GetTableValue(const SQL: Ansistring; const Bindings: array of const): int64; overload; + function GetTableString(const SQL: Ansistring): string; overload; + function GetTableString(const SQL: Ansistring; const Bindings: array of const): string; overload; + procedure GetTableStrings(const SQL: Ansistring; const Value: TStrings); + procedure UpdateBlob(const SQL: Ansistring; BlobData: TStream); + procedure BeginTransaction; + procedure Commit; + procedure Rollback; + function TableExists(TableName: string): boolean; + function ContainsColumn(Table: String; Column: String) : boolean; + function GetLastInsertRowID: int64; + function GetLastChangedRows: int64; + procedure SetTimeout(Value: integer); + function Version: string; + procedure AddCustomCollate(name: string; xCompare: TCollateXCompare); + //adds collate named SYSTEM for correct data sorting by user's locale + Procedure AddSystemCollate; + procedure ParamsClear; + procedure AddParamInt(name: string; value: int64); + procedure AddParamFloat(name: string; value: double); + procedure AddParamText(name: string; value: string); + procedure AddParamNull(name: string); + property DB: TSQLiteDB read fDB; + published + property IsTransactionOpen: boolean read fInTrans; + //database rows that were changed (or inserted or deleted) by the most recent SQL statement + property RowsChanged : integer read getRowsChanged; + property Synchronised: boolean read FSync write SetSynchronised; + property OnQuery: THookQuery read FOnQuery write FOnQuery; + end; + + TSQLiteTable = class + private + fResults: TList; + fRowCount: cardinal; + fColCount: cardinal; + fCols: TStringList; + fColTypes: TList; + fRow: cardinal; + function GetFields(I: cardinal): string; + function GetEOF: boolean; + function GetBOF: boolean; + function GetColumns(I: integer): string; + function GetFieldByName(FieldName: string): string; + function GetFieldIndex(FieldName: string): integer; + function GetCount: integer; + function GetCountResult: integer; + public + constructor Create(DB: TSQLiteDatabase; const SQL: Ansistring); overload; + constructor Create(DB: TSQLiteDatabase; const SQL: Ansistring; const Bindings: array of const); overload; + destructor Destroy; override; + function FieldAsInteger(I: cardinal): int64; + function FieldAsBlob(I: cardinal): TMemoryStream; + function FieldAsBlobText(I: cardinal): string; + function FieldIsNull(I: cardinal): boolean; + function FieldAsString(I: cardinal): string; + function FieldAsDouble(I: cardinal): double; + function Next: boolean; + function Previous: boolean; + property EOF: boolean read GetEOF; + property BOF: boolean read GetBOF; + property Fields[I: cardinal]: string read GetFields; + property FieldByName[FieldName: string]: string read GetFieldByName; + property FieldIndex[FieldName: string]: integer read GetFieldIndex; + property Columns[I: integer]: string read GetColumns; + property ColCount: cardinal read fColCount; + property RowCount: cardinal read fRowCount; + property Row: cardinal read fRow; + function MoveFirst: boolean; + function MoveLast: boolean; + function MoveTo(position: cardinal): boolean; + property Count: integer read GetCount; + // The property CountResult is used when you execute count(*) queries. + // It returns 0 if the result set is empty or the value of the + // first field as an integer. + property CountResult: integer read GetCountResult; + end; + + TSQLiteUniTable = class + private + fColCount: cardinal; + fCols: TStringList; + fRow: cardinal; + fEOF: boolean; + fStmt: TSQLiteStmt; + fDB: TSQLiteDatabase; + fSQL: string; + function GetFields(I: cardinal): string; + function GetColumns(I: integer): string; + function GetFieldByName(FieldName: string): string; + function GetFieldIndex(FieldName: string): integer; + public + constructor Create(DB: TSQLiteDatabase; const SQL: Ansistring); overload; + constructor Create(DB: TSQLiteDatabase; const SQL: Ansistring; const Bindings: array of const); overload; + destructor Destroy; override; + function FieldAsInteger(I: cardinal): int64; + function FieldAsBlob(I: cardinal): TMemoryStream; + function FieldAsBlobPtr(I: cardinal; out iNumBytes: integer): Pointer; + function FieldAsBlobText(I: cardinal): string; + function FieldIsNull(I: cardinal): boolean; + function FieldAsString(I: cardinal): string; + function FieldAsDouble(I: cardinal): double; + function Next: boolean; + property EOF: boolean read FEOF; + property Fields[I: cardinal]: string read GetFields; + property FieldByName[FieldName: string]: string read GetFieldByName; + property FieldIndex[FieldName: string]: integer read GetFieldIndex; + property Columns[I: integer]: string read GetColumns; + property ColCount: cardinal read fColCount; + property Row: cardinal read fRow; + end; + +procedure DisposePointer(ptr: pointer); cdecl; + +{$IFDEF MSWINDOWS} +function SystemCollate(Userdta: pointer; Buf1Len: integer; Buf1: pointer; + Buf2Len: integer; Buf2: pointer): integer; cdecl; +{$ENDIF} + +implementation + +procedure DisposePointer(ptr: pointer); cdecl; +begin + if assigned(ptr) then + freemem(ptr); +end; + +{$IFDEF MSWINDOWS} +function SystemCollate(Userdta: pointer; Buf1Len: integer; Buf1: pointer; + Buf2Len: integer; Buf2: pointer): integer; cdecl; +begin + Result := CompareStringW(LOCALE_USER_DEFAULT, 0, PWideChar(Buf1), Buf1Len, + PWideChar(Buf2), Buf2Len) - 2; +end; +{$ENDIF} + +//------------------------------------------------------------------------------ +// TSQLiteDatabase +//------------------------------------------------------------------------------ + +constructor TSQLiteDatabase.Create(const FileName: string); +var + Msg: PAnsiChar; + iResult: integer; + utf8FileName: UTF8string; +begin + inherited Create; + fParams := TList.Create; + + self.fInTrans := False; + + Msg := nil; + try + utf8FileName := UTF8String(FileName); + iResult := SQLite3_Open(PAnsiChar(utf8FileName), Fdb); + + if iResult <> SQLITE_OK then + if Assigned(Fdb) then + begin + Msg := Sqlite3_ErrMsg(Fdb); + raise ESqliteException.CreateFmt('Failed to open database "%s" : %s', + [FileName, Msg]); + end + else + raise ESqliteException.CreateFmt('Failed to open database "%s" : unknown error', + [FileName]); + +//set a few configs +//L.G. Do not call it here. Because busy handler is not setted here, +// any share violation causing exception! + +// self.ExecSQL('PRAGMA SYNCHRONOUS=NORMAL;'); +// self.ExecSQL('PRAGMA temp_store = MEMORY;'); + + finally + if Assigned(Msg) then + SQLite3_Free(Msg); + end; + +end; + +//.............................................................................. + +destructor TSQLiteDatabase.Destroy; +begin + if self.fInTrans then + self.Rollback; //assume rollback + if Assigned(fDB) then + SQLite3_Close(fDB); + ParamsClear; + fParams.Free; + inherited; +end; + +function TSQLiteDatabase.GetLastInsertRowID: int64; +begin + Result := Sqlite3_LastInsertRowID(self.fDB); +end; + +function TSQLiteDatabase.GetLastChangedRows: int64; +begin + Result := SQLite3_TotalChanges(self.fDB); +end; + +//.............................................................................. + +procedure TSQLiteDatabase.RaiseError(s: string; SQL: string); +//look up last error and raise an exception with an appropriate message +var + Msg: PAnsiChar; + ret : integer; +begin + + Msg := nil; + + ret := sqlite3_errcode(self.fDB); + if ret <> SQLITE_OK then + Msg := sqlite3_errmsg(self.fDB); + + if Msg <> nil then + raise ESqliteException.CreateFmt(s +'.'#13'Error [%d]: %s.'#13'"%s": %s', [ret, SQLiteErrorStr(ret),SQL, Msg]) + else + raise ESqliteException.CreateFmt(s, [SQL, 'No message']); + +end; + +procedure TSQLiteDatabase.SetSynchronised(Value: boolean); +begin + if Value <> fSync then + begin + if Value then + ExecSQL('PRAGMA synchronous = ON;') + else + ExecSQL('PRAGMA synchronous = OFF;'); + fSync := Value; + end; +end; + +procedure TSQLiteDatabase.BindData(Stmt: TSQLiteStmt; const Bindings: array of const); +var + BlobMemStream: TCustomMemoryStream; + BlobStdStream: TStream; + DataPtr: Pointer; + DataSize: integer; + AnsiStr: AnsiString; + AnsiStrPtr: PAnsiString; + I: integer; +begin + for I := 0 to High(Bindings) do + begin + case Bindings[I].VType of + vtString, + vtAnsiString, vtPChar, + vtWideString, vtPWideChar, + vtChar, vtWideChar: + begin + case Bindings[I].VType of + vtString: begin // ShortString + AnsiStr := Bindings[I].VString^; + DataPtr := PAnsiChar(AnsiStr); + DataSize := Length(AnsiStr)+1; + end; + vtPChar: begin + DataPtr := Bindings[I].VPChar; + DataSize := -1; + end; + vtAnsiString: begin + AnsiStrPtr := PAnsiString(@Bindings[I].VAnsiString); + DataPtr := PAnsiChar(AnsiStrPtr^); + DataSize := Length(AnsiStrPtr^)+1; + end; + vtPWideChar: begin + AnsiStr := UTF8Encode(WideString(Bindings[I].VPWideChar)); + DataPtr := PAnsiChar(AnsiStr); + DataSize := -1; + end; + vtWideString: begin + AnsiStr := UTF8Encode(PWideString(@Bindings[I].VWideString)^); + DataPtr := PAnsiChar(AnsiStr); + DataSize := -1; + end; + vtChar: begin + AnsiStr := AnsiString(Bindings[I].VChar); + DataPtr := PAnsiChar(AnsiStr); + DataSize := 2; + end; + vtWideChar: begin + AnsiStr := UTF8Encode(WideString(Bindings[I].VWideChar)); + DataPtr := PAnsiChar(AnsiStr); + DataSize := -1; + end; + else + raise ESqliteException.Create('Unknown string-type'); + end; + if (sqlite3_bind_text(Stmt, I+1, DataPtr, DataSize, SQLITE_STATIC) <> SQLITE_OK) then + RaiseError('Could not bind text', 'BindData'); + end; + vtInteger: + if (sqlite3_bind_int(Stmt, I+1, Bindings[I].VInteger) <> SQLITE_OK) then + RaiseError('Could not bind integer', 'BindData'); + vtInt64: + if (sqlite3_bind_int64(Stmt, I+1, Bindings[I].VInt64^) <> SQLITE_OK) then + RaiseError('Could not bind int64', 'BindData'); + vtExtended: + if (sqlite3_bind_double(Stmt, I+1, Bindings[I].VExtended^) <> SQLITE_OK) then + RaiseError('Could not bind extended', 'BindData'); + vtBoolean: + if (sqlite3_bind_int(Stmt, I+1, Integer(Bindings[I].VBoolean)) <> SQLITE_OK) then + RaiseError('Could not bind boolean', 'BindData'); + vtPointer: + begin + if (Bindings[I].VPointer = nil) then + begin + if (sqlite3_bind_null(Stmt, I+1) <> SQLITE_OK) then + RaiseError('Could not bind null', 'BindData'); + end + else + raise ESqliteException.Create('Unhandled pointer (<> nil)'); + end; + vtObject: + begin + if (Bindings[I].VObject is TCustomMemoryStream) then + begin + BlobMemStream := TCustomMemoryStream(Bindings[I].VObject); + if (sqlite3_bind_blob(Stmt, I+1, @PAnsiChar(BlobMemStream.Memory)[BlobMemStream.Position], + BlobMemStream.Size-BlobMemStream.Position, SQLITE_STATIC) <> SQLITE_OK) then + begin + RaiseError('Could not bind BLOB', 'BindData'); + end; + end + else if (Bindings[I].VObject is TStream) then + begin + BlobStdStream := TStream(Bindings[I].VObject); + DataSize := BlobStdStream.Size; + + GetMem(DataPtr, DataSize); + if (DataPtr = nil) then + raise ESqliteException.Create('Error getting memory to save blob'); + + BlobStdStream.Position := 0; + BlobStdStream.Read(DataPtr^, DataSize); + + if (sqlite3_bind_blob(stmt, I+1, DataPtr, DataSize, @DisposePointer) <> SQLITE_OK) then + RaiseError('Could not bind BLOB', 'BindData'); + end + else + raise ESqliteException.Create('Unhandled object-type in binding'); + end + else + begin + raise ESqliteException.Create('Unhandled binding'); + end; + end; + end; +end; + +procedure TSQLiteDatabase.ExecSQL(const SQL: Ansistring); +begin + ExecSQL(SQL, []); +end; + +procedure TSQLiteDatabase.ExecSQL(const SQL: Ansistring; const Bindings: array of const); +var + Stmt: TSQLiteStmt; + NextSQLStatement: PAnsiChar; + iStepResult: integer; +begin + try + if Sqlite3_Prepare_v2(self.fDB, PAnsiChar(SQL), -1, Stmt, NextSQLStatement) <> + SQLITE_OK then + RaiseError('Error executing SQL', SQL); + if (Stmt = nil) then + RaiseError('Could not prepare SQL statement', SQL); + DoQuery(SQL); + SetParams(Stmt); + BindData(Stmt, Bindings); + + iStepResult := Sqlite3_step(Stmt); + if (iStepResult <> SQLITE_DONE) then + begin + SQLite3_reset(stmt); + RaiseError('Error executing SQL statement', SQL); + end; + finally + if Assigned(Stmt) then + Sqlite3_Finalize(stmt); + end; +end; + +procedure TSQLiteDatabase.ExecSQL(Query: TSQLiteQuery); +var + iStepResult: integer; +begin + if Assigned(Query.Statement) then + begin + iStepResult := Sqlite3_step(Query.Statement); + + if (iStepResult <> SQLITE_DONE) then + begin + SQLite3_reset(Query.Statement); + RaiseError('Error executing prepared SQL statement', Query.SQL); + end; + Sqlite3_Reset(Query.Statement); + end; +end; + +function TSQLiteDatabase.PrepareSQL(const SQL: Ansistring): TSQLiteQuery; +var + Stmt: TSQLiteStmt; + NextSQLStatement: PAnsiChar; +begin + Result.SQL := SQL; + Result.Statement := nil; + + if Sqlite3_Prepare(self.fDB, PAnsiChar(SQL), -1, Stmt, NextSQLStatement) <> + SQLITE_OK then + RaiseError('Error executing SQL', SQL) + else + Result.Statement := Stmt; + + if (Result.Statement = nil) then + RaiseError('Could not prepare SQL statement', SQL); + DoQuery(SQL); +end; + +procedure TSQLiteDatabase.BindSQL(Query: TSQLiteQuery; const Index: Integer; const Value: Integer); +begin + if Assigned(Query.Statement) then + sqlite3_Bind_Int(Query.Statement, Index, Value) + else + RaiseError('Could not bind integer to prepared SQL statement', Query.SQL); +end; + +procedure TSQLiteDatabase.BindSQL(Query: TSQLiteQuery; const Index: Integer; const Value: String); +begin + if Assigned(Query.Statement) then + Sqlite3_Bind_Text(Query.Statement, Index, PAnsiChar(Value), Length(Value), Pointer(SQLITE_STATIC)) + else + RaiseError('Could not bind string to prepared SQL statement', Query.SQL); +end; + +procedure TSQLiteDatabase.ReleaseSQL(Query: TSQLiteQuery); +begin + if Assigned(Query.Statement) then + begin + Sqlite3_Finalize(Query.Statement); + Query.Statement := nil; + end + else + RaiseError('Could not release prepared SQL statement', Query.SQL); +end; + +procedure TSQLiteDatabase.UpdateBlob(const SQL: Ansistring; BlobData: TStream); +var + iSize: integer; + ptr: pointer; + Stmt: TSQLiteStmt; + Msg: PAnsiChar; + NextSQLStatement: PAnsiChar; + iStepResult: integer; + iBindResult: integer; +begin + //expects SQL of the form 'UPDATE MYTABLE SET MYFIELD = ? WHERE MYKEY = 1' + if pos('?', SQL) = 0 then + RaiseError('SQL must include a ? parameter', SQL); + + Msg := nil; + try + + if Sqlite3_Prepare_v2(self.fDB, PAnsiChar(SQL), -1, Stmt, NextSQLStatement) <> + SQLITE_OK then + RaiseError('Could not prepare SQL statement', SQL); + + if (Stmt = nil) then + RaiseError('Could not prepare SQL statement', SQL); + DoQuery(SQL); + + //now bind the blob data + iSize := BlobData.size; + + GetMem(ptr, iSize); + + if (ptr = nil) then + raise ESqliteException.CreateFmt('Error getting memory to save blob', + [SQL, 'Error']); + + BlobData.position := 0; + BlobData.Read(ptr^, iSize); + + iBindResult := SQLite3_Bind_Blob(stmt, 1, ptr, iSize, @DisposePointer); + + if iBindResult <> SQLITE_OK then + RaiseError('Error binding blob to database', SQL); + + iStepResult := Sqlite3_step(Stmt); + + if (iStepResult <> SQLITE_DONE) then + begin + SQLite3_reset(stmt); + RaiseError('Error executing SQL statement', SQL); + end; + + finally + + if Assigned(Stmt) then + Sqlite3_Finalize(stmt); + + if Assigned(Msg) then + SQLite3_Free(Msg); + end; + +end; + +//.............................................................................. + +function TSQLiteDatabase.GetTable(const SQL: Ansistring): TSQLiteTable; +begin + Result := TSQLiteTable.Create(Self, SQL); +end; + +function TSQLiteDatabase.GetTable(const SQL: Ansistring; const Bindings: array of const): TSQLiteTable; +begin + Result := TSQLiteTable.Create(Self, SQL, Bindings); +end; + +function TSQLiteDatabase.GetUniTable(const SQL: Ansistring): TSQLiteUniTable; +begin + Result := TSQLiteUniTable.Create(Self, SQL); +end; + +function TSQLiteDatabase.GetUniTable(const SQL: Ansistring; const Bindings: array of const): TSQLiteUniTable; +begin + Result := TSQLiteUniTable.Create(Self, SQL, Bindings); +end; + +function TSQLiteDatabase.GetTableValue(const SQL: Ansistring): int64; +begin + Result := GetTableValue(SQL, []); +end; + +function TSQLiteDatabase.GetTableValue(const SQL: Ansistring; const Bindings: array of const): int64; +var + Table: TSQLiteUniTable; +begin + Result := 0; + Table := self.GetUniTable(SQL, Bindings); + try + if not Table.EOF then + Result := Table.FieldAsInteger(0); + finally + Table.Free; + end; +end; + +function TSQLiteDatabase.GetTableString(const SQL: Ansistring): String; +begin + Result := GetTableString(SQL, []); +end; + +function TSQLiteDatabase.GetTableString(const SQL: Ansistring; const Bindings: array of const): String; +var + Table: TSQLiteUniTable; +begin + Result := ''; + Table := self.GetUniTable(SQL, Bindings); + try + if not Table.EOF then + Result := Table.FieldAsString(0); + finally + Table.Free; + end; +end; + +procedure TSQLiteDatabase.GetTableStrings(const SQL: Ansistring; + const Value: TStrings); +var + Table: TSQLiteUniTable; +begin + Value.Clear; + Table := self.GetUniTable(SQL); + try + while not table.EOF do + begin + Value.Add(Table.FieldAsString(0)); + table.Next; + end; + finally + Table.Free; + end; +end; + +procedure TSQLiteDatabase.BeginTransaction; +begin + if not self.fInTrans then + begin + self.ExecSQL('BEGIN TRANSACTION'); + self.fInTrans := True; + end + else + raise ESqliteException.Create('Transaction already open'); +end; + +procedure TSQLiteDatabase.Commit; +begin + self.ExecSQL('COMMIT'); + self.fInTrans := False; +end; + +procedure TSQLiteDatabase.Rollback; +begin + self.ExecSQL('ROLLBACK'); + self.fInTrans := False; +end; + +function TSQLiteDatabase.TableExists(TableName: string): boolean; +var + sql: string; + ds: TSqliteTable; +begin + //returns true if table exists in the database + sql := 'select [sql] from sqlite_master where [type] = ''table'' and lower(name) = ''' + + lowercase(TableName) + ''' '; + ds := self.GetTable(sql); + try + Result := (ds.Count > 0); + finally + ds.Free; + end; +end; + +function TSQLiteDatabase.ContainsColumn(Table: String; Column: String) : boolean; +var + sql: string; + ds: TSqliteTable; + i : integer; +begin + sql := 'PRAGMA TABLE_INFO('+Table+');'; + ds := self.GetTable(sql); + try + Result := false; + while (ds.Next() and not Result and not ds.EOF) do + begin + if ds.FieldAsString(1) = Column then + Result := true; + end; + finally + ds.Free; + end; +end; + +procedure TSQLiteDatabase.SetTimeout(Value: integer); +begin + SQLite3_BusyTimeout(self.fDB, Value); +end; + +function TSQLiteDatabase.Version: string; +begin + Result := SQLite3_Version; +end; + +procedure TSQLiteDatabase.AddCustomCollate(name: string; + xCompare: TCollateXCompare); +begin + sqlite3_create_collation(fdb, PAnsiChar(name), SQLITE_UTF8, nil, xCompare); +end; + +procedure TSQLiteDatabase.AddSystemCollate; +begin + {$IFDEF MSWINDOWS} + sqlite3_create_collation(fdb, 'SYSTEM', SQLITE_UTF16LE, nil, @SystemCollate); + {$ENDIF} +end; + +procedure TSQLiteDatabase.ParamsClear; +var + n: integer; +begin + for n := fParams.Count - 1 downto 0 do + TSQliteParam(fparams[n]).free; + fParams.Clear; +end; + +procedure TSQLiteDatabase.AddParamInt(name: string; value: int64); +var + par: TSQliteParam; +begin + par := TSQliteParam.Create; + par.name := name; + par.valuetype := SQLITE_INTEGER; + par.valueinteger := value; + fParams.Add(par); +end; + +procedure TSQLiteDatabase.AddParamFloat(name: string; value: double); +var + par: TSQliteParam; +begin + par := TSQliteParam.Create; + par.name := name; + par.valuetype := SQLITE_FLOAT; + par.valuefloat := value; + fParams.Add(par); +end; + +procedure TSQLiteDatabase.AddParamText(name: string; value: string); +var + par: TSQliteParam; +begin + par := TSQliteParam.Create; + par.name := name; + par.valuetype := SQLITE_TEXT; + par.valuedata := value; + fParams.Add(par); +end; + +procedure TSQLiteDatabase.AddParamNull(name: string); +var + par: TSQliteParam; +begin + par := TSQliteParam.Create; + par.name := name; + par.valuetype := SQLITE_NULL; + fParams.Add(par); +end; + +procedure TSQLiteDatabase.SetParams(Stmt: TSQLiteStmt); +var + n: integer; + i: integer; + par: TSQliteParam; +begin + try + for n := 0 to fParams.Count - 1 do + begin + par := TSQliteParam(fParams[n]); + i := sqlite3_bind_parameter_index(Stmt, PAnsiChar(par.name)); + if i > 0 then + begin + case par.valuetype of + SQLITE_INTEGER: + sqlite3_bind_int64(Stmt, i, par.valueinteger); + SQLITE_FLOAT: + sqlite3_bind_double(Stmt, i, par.valuefloat); + SQLITE_TEXT: + sqlite3_bind_text(Stmt, i, PAnsiChar(par.valuedata), + length(par.valuedata), SQLITE_TRANSIENT); + SQLITE_NULL: + sqlite3_bind_null(Stmt, i); + end; + end; + end; + finally + ParamsClear; + end; +end; + +//database rows that were changed (or inserted or deleted) by the most recent SQL statement +function TSQLiteDatabase.GetRowsChanged: integer; +begin + Result := SQLite3_Changes(self.fDB); +end; + +procedure TSQLiteDatabase.DoQuery(value: string); +begin + if assigned(OnQuery) then + OnQuery(Self, Value); +end; + +//------------------------------------------------------------------------------ +// TSQLiteTable +//------------------------------------------------------------------------------ + +constructor TSQLiteTable.Create(DB: TSQLiteDatabase; const SQL: Ansistring); +begin + Create(DB, SQL, []); +end; + +constructor TSQLiteTable.Create(DB: TSQLiteDatabase; const SQL: Ansistring; const Bindings: array of const); +var + Stmt: TSQLiteStmt; + NextSQLStatement: PAnsiChar; + iStepResult: integer; + ptr: pointer; + iNumBytes: integer; + thisBlobValue: TMemoryStream; + thisStringValue: pstring; + thisDoubleValue: pDouble; + thisIntValue: pInt64; + thisColType: pInteger; + i: integer; + DeclaredColType: PAnsiChar; + ActualColType: integer; + ptrValue: PAnsiChar; +begin + inherited create; + try + self.fRowCount := 0; + self.fColCount := 0; + //if there are several SQL statements in SQL, NextSQLStatment points to the + //beginning of the next one. Prepare only prepares the first SQL statement. + if Sqlite3_Prepare_v2(DB.fDB, PAnsiChar(SQL), -1, Stmt, NextSQLStatement) <> SQLITE_OK then + DB.RaiseError('Error executing SQL', SQL); + if (Stmt = nil) then + DB.RaiseError('Could not prepare SQL statement', SQL); + DB.DoQuery(SQL); + DB.SetParams(Stmt); + DB.BindData(Stmt, Bindings); + + iStepResult := Sqlite3_step(Stmt); + while (iStepResult <> SQLITE_DONE) do + begin + case iStepResult of + SQLITE_ROW: + begin + Inc(fRowCount); + if (fRowCount = 1) then + begin + //get data types + fCols := TStringList.Create; + fColTypes := TList.Create; + fColCount := SQLite3_ColumnCount(stmt); + for i := 0 to Pred(fColCount) do + fCols.Add(AnsiUpperCase(Sqlite3_ColumnName(stmt, i))); + for i := 0 to Pred(fColCount) do + begin + new(thisColType); + DeclaredColType := Sqlite3_ColumnDeclType(stmt, i); + if DeclaredColType = nil then + thisColType^ := Sqlite3_ColumnType(stmt, i) //use the actual column type instead + //seems to be needed for last_insert_rowid + else + if (DeclaredColType = 'INTEGER') or (DeclaredColType = 'BOOLEAN') then + thisColType^ := dtInt + else + if (DeclaredColType = 'NUMERIC') or + (DeclaredColType = 'FLOAT') or + (DeclaredColType = 'DOUBLE') or + (DeclaredColType = 'REAL') then + thisColType^ := dtNumeric + else + if DeclaredColType = 'BLOB' then + thisColType^ := dtBlob + else + thisColType^ := dtStr; + fColTypes.Add(thiscoltype); + end; + fResults := TList.Create; + end; + + //get column values + for i := 0 to Pred(ColCount) do + begin + ActualColType := Sqlite3_ColumnType(stmt, i); + if (ActualColType = SQLITE_NULL) then + fResults.Add(nil) + else + if pInteger(fColTypes[i])^ = dtInt then + begin + new(thisintvalue); + thisintvalue^ := Sqlite3_ColumnInt64(stmt, i); + fResults.Add(thisintvalue); + end + else + if pInteger(fColTypes[i])^ = dtNumeric then + begin + new(thisdoublevalue); + thisdoublevalue^ := Sqlite3_ColumnDouble(stmt, i); + fResults.Add(thisdoublevalue); + end + else + if pInteger(fColTypes[i])^ = dtBlob then + begin + iNumBytes := Sqlite3_ColumnBytes(stmt, i); + if iNumBytes = 0 then + thisblobvalue := nil + else + begin + thisblobvalue := TMemoryStream.Create; + thisblobvalue.position := 0; + ptr := Sqlite3_ColumnBlob(stmt, i); + thisblobvalue.writebuffer(ptr^, iNumBytes); + end; + fResults.Add(thisblobvalue); + end + else + begin + new(thisstringvalue); + ptrValue := Sqlite3_ColumnText(stmt, i); + setstring(thisstringvalue^, ptrvalue, strlen(ptrvalue)); + fResults.Add(thisstringvalue); + end; + end; + end; + SQLITE_BUSY: + raise ESqliteException.CreateFmt('Could not prepare SQL statement', + [SQL, 'SQLite is Busy']); + else + begin + SQLite3_reset(stmt); + DB.RaiseError('Could not retrieve data', SQL); + end; + end; + iStepResult := Sqlite3_step(Stmt); + end; + fRow := 0; + finally + if Assigned(Stmt) then + Sqlite3_Finalize(stmt); + end; +end; + +//.............................................................................. + +destructor TSQLiteTable.Destroy; +var + i: cardinal; + iColNo: integer; +begin + if Assigned(fResults) then + begin + for i := 0 to fResults.Count - 1 do + begin + //check for blob type + iColNo := (i mod fColCount); + case pInteger(self.fColTypes[iColNo])^ of + dtBlob: + TMemoryStream(fResults[i]).Free; + dtStr: + if fResults[i] <> nil then + begin + setstring(string(fResults[i]^), nil, 0); + dispose(fResults[i]); + end; + else + dispose(fResults[i]); + end; + end; + fResults.Free; + end; + if Assigned(fCols) then + fCols.Free; + if Assigned(fColTypes) then + for i := 0 to fColTypes.Count - 1 do + dispose(fColTypes[i]); + fColTypes.Free; + inherited; +end; + +//.............................................................................. + +function TSQLiteTable.GetColumns(I: integer): string; +begin + Result := fCols[I]; +end; + +//.............................................................................. + +function TSQLiteTable.GetCountResult: integer; +begin + if not EOF then + Result := StrToInt(Fields[0]) + else + Result := 0; +end; + +function TSQLiteTable.GetCount: integer; +begin + Result := FRowCount; +end; + +//.............................................................................. + +function TSQLiteTable.GetEOF: boolean; +begin + Result := fRow >= fRowCount; +end; + +function TSQLiteTable.GetBOF: boolean; +begin + Result := fRow <= 0; +end; + +//.............................................................................. + +function TSQLiteTable.GetFieldByName(FieldName: string): string; +begin + Result := GetFields(self.GetFieldIndex(FieldName)); +end; + +function TSQLiteTable.GetFieldIndex(FieldName: string): integer; +begin + if (fCols = nil) then + begin + raise ESqliteException.Create('Field ' + fieldname + ' Not found. Empty dataset'); + exit; + end; + + if (fCols.count = 0) then + begin + raise ESqliteException.Create('Field ' + fieldname + ' Not found. Empty dataset'); + exit; + end; + + Result := fCols.IndexOf(AnsiUpperCase(FieldName)); + + if (result < 0) then + begin + raise ESqliteException.Create('Field not found in dataset: ' + fieldname) + end; +end; + +//.............................................................................. + +function TSQLiteTable.GetFields(I: cardinal): string; +var + thisvalue: pstring; + thistype: integer; +begin + Result := ''; + if EOF then + raise ESqliteException.Create('Table is at End of File'); + //integer types are not stored in the resultset + //as strings, so they should be retrieved using the type-specific + //methods + thistype := pInteger(self.fColTypes[I])^; + + case thistype of + dtStr: + begin + thisvalue := self.fResults[(self.frow * self.fColCount) + I]; + if (thisvalue <> nil) then + Result := thisvalue^ + else + Result := ''; + end; + dtInt: + Result := IntToStr(self.FieldAsInteger(I)); + dtNumeric: + Result := FloatToStr(self.FieldAsDouble(I)); + dtBlob: + Result := self.FieldAsBlobText(I); + else + Result := ''; + end; +end; + +function TSqliteTable.FieldAsBlob(I: cardinal): TMemoryStream; +begin + if EOF then + raise ESqliteException.Create('Table is at End of File'); + if (self.fResults[(self.frow * self.fColCount) + I] = nil) then + Result := nil + else + if pInteger(self.fColTypes[I])^ = dtBlob then + Result := TMemoryStream(self.fResults[(self.frow * self.fColCount) + I]) + else + raise ESqliteException.Create('Not a Blob field'); +end; + +function TSqliteTable.FieldAsBlobText(I: cardinal): string; +var + MemStream: TMemoryStream; + Buffer: PAnsiChar; +begin + Result := ''; + MemStream := self.FieldAsBlob(I); + if MemStream <> nil then + if MemStream.Size > 0 then + begin + MemStream.position := 0; + {$IFDEF UNICODE} + Buffer := AnsiStralloc(MemStream.Size + 1); + {$ELSE} + Buffer := Stralloc(MemStream.Size + 1); + {$ENDIF} + MemStream.readbuffer(Buffer[0], MemStream.Size); + (Buffer + MemStream.Size)^ := chr(0); + SetString(Result, Buffer, MemStream.size); + strdispose(Buffer); + end; + //do not free the TMemoryStream here; it is freed when + //TSqliteTable is destroyed + +end; + + +function TSqliteTable.FieldAsInteger(I: cardinal): int64; +begin + if EOF then + raise ESqliteException.Create('Table is at End of File'); + if (self.fResults[(self.frow * self.fColCount) + I] = nil) then + Result := 0 + else + if pInteger(self.fColTypes[I])^ = dtInt then + Result := pInt64(self.fResults[(self.frow * self.fColCount) + I])^ + else + if pInteger(self.fColTypes[I])^ = dtNumeric then + Result := trunc(strtofloat(pString(self.fResults[(self.frow * self.fColCount) + I])^)) + else + raise ESqliteException.Create('Not an integer or numeric field'); +end; + +function TSqliteTable.FieldAsDouble(I: cardinal): double; +begin + if EOF then + raise ESqliteException.Create('Table is at End of File'); + if (self.fResults[(self.frow * self.fColCount) + I] = nil) then + Result := 0 + else + if pInteger(self.fColTypes[I])^ = dtInt then + Result := pInt64(self.fResults[(self.frow * self.fColCount) + I])^ + else + if pInteger(self.fColTypes[I])^ = dtNumeric then + Result := pDouble(self.fResults[(self.frow * self.fColCount) + I])^ + else + raise ESqliteException.Create('Not an integer or numeric field'); +end; + +function TSqliteTable.FieldAsString(I: cardinal): string; +begin + if EOF then + raise ESqliteException.Create('Table is at End of File'); + if (self.fResults[(self.frow * self.fColCount) + I] = nil) then + Result := '' + else + Result := self.GetFields(I); +end; + +function TSqliteTable.FieldIsNull(I: cardinal): boolean; +var + thisvalue: pointer; +begin + if EOF then + raise ESqliteException.Create('Table is at End of File'); + thisvalue := self.fResults[(self.frow * self.fColCount) + I]; + Result := (thisvalue = nil); +end; + +//.............................................................................. + +function TSQLiteTable.Next: boolean; +begin + Result := False; + if not EOF then + begin + Inc(fRow); + Result := True; + end; +end; + +function TSQLiteTable.Previous: boolean; +begin + Result := False; + if not BOF then + begin + Dec(fRow); + Result := True; + end; +end; + +function TSQLiteTable.MoveFirst: boolean; +begin + Result := False; + if self.fRowCount > 0 then + begin + fRow := 0; + Result := True; + end; +end; + +function TSQLiteTable.MoveLast: boolean; +begin + Result := False; + if self.fRowCount > 0 then + begin + fRow := fRowCount - 1; + Result := True; + end; +end; + +function TSQLiteTable.MoveTo(position: cardinal): boolean; +begin + Result := False; + if (self.fRowCount > 0) and (self.fRowCount > position) then + begin + fRow := position; + Result := True; + end; +end; + + + +{ TSQLiteUniTable } + +constructor TSQLiteUniTable.Create(DB: TSQLiteDatabase; const SQL: Ansistring); +begin + Create(DB, SQL, []); +end; + +constructor TSQLiteUniTable.Create(DB: TSQLiteDatabase; const SQL: Ansistring; const Bindings: array of const); +var + NextSQLStatement: PAnsiChar; + i: integer; +begin + inherited create; + self.fDB := db; + self.fEOF := false; + self.fRow := 0; + self.fColCount := 0; + self.fSQL := SQL; + if Sqlite3_Prepare_v2(DB.fDB, PAnsiChar(SQL), -1, fStmt, NextSQLStatement) <> SQLITE_OK then + DB.RaiseError('Error executing SQL', SQL); + if (fStmt = nil) then + DB.RaiseError('Could not prepare SQL statement', SQL); + DB.DoQuery(SQL); + DB.SetParams(fStmt); + DB.BindData(fStmt, Bindings); + + //get data types + fCols := TStringList.Create; + fColCount := SQLite3_ColumnCount(fstmt); + for i := 0 to Pred(fColCount) do + fCols.Add(AnsiUpperCase(Sqlite3_ColumnName(fstmt, i))); + + Next; +end; + +destructor TSQLiteUniTable.Destroy; +begin + if Assigned(fStmt) then + Sqlite3_Finalize(fstmt); + if Assigned(fCols) then + fCols.Free; + inherited; +end; + +function TSQLiteUniTable.FieldAsBlob(I: cardinal): TMemoryStream; +var + iNumBytes: integer; + ptr: pointer; +begin + Result := TMemoryStream.Create; + iNumBytes := Sqlite3_ColumnBytes(fstmt, i); + if iNumBytes > 0 then + begin + ptr := Sqlite3_ColumnBlob(fstmt, i); + Result.writebuffer(ptr^, iNumBytes); + Result.Position := 0; + end; +end; + +function TSQLiteUniTable.FieldAsBlobPtr(I: cardinal; out iNumBytes: integer): Pointer; +begin + iNumBytes := Sqlite3_ColumnBytes(fstmt, i); + Result := Sqlite3_ColumnBlob(fstmt, i); +end; + +function TSQLiteUniTable.FieldAsBlobText(I: cardinal): string; +var + MemStream: TMemoryStream; + Buffer: PAnsiChar; +begin + Result := ''; + MemStream := self.FieldAsBlob(I); + if MemStream <> nil then + try + if MemStream.Size > 0 then + begin + MemStream.position := 0; + {$IFDEF UNICODE} + Buffer := AnsiStralloc(MemStream.Size + 1); + {$ELSE} + Buffer := Stralloc(MemStream.Size + 1); + {$ENDIF} + MemStream.readbuffer(Buffer[0], MemStream.Size); + (Buffer + MemStream.Size)^ := chr(0); + SetString(Result, Buffer, MemStream.size); + strdispose(Buffer); + end; + finally + MemStream.Free; + end; +end; + +function TSQLiteUniTable.FieldAsDouble(I: cardinal): double; +begin + Result := Sqlite3_ColumnDouble(fstmt, i); +end; + +function TSQLiteUniTable.FieldAsInteger(I: cardinal): int64; +begin + Result := Sqlite3_ColumnInt64(fstmt, i); +end; + +function TSQLiteUniTable.FieldAsString(I: cardinal): string; +begin + Result := self.GetFields(I); +end; + +function TSQLiteUniTable.FieldIsNull(I: cardinal): boolean; +begin + Result := Sqlite3_ColumnText(fstmt, i) = nil; +end; + +function TSQLiteUniTable.GetColumns(I: integer): string; +begin + Result := fCols[I]; +end; + +function TSQLiteUniTable.GetFieldByName(FieldName: string): string; +begin + Result := GetFields(self.GetFieldIndex(FieldName)); +end; + +function TSQLiteUniTable.GetFieldIndex(FieldName: string): integer; +begin + if (fCols = nil) then + begin + raise ESqliteException.Create('Field ' + fieldname + ' Not found. Empty dataset'); + exit; + end; + + if (fCols.count = 0) then + begin + raise ESqliteException.Create('Field ' + fieldname + ' Not found. Empty dataset'); + exit; + end; + + Result := fCols.IndexOf(AnsiUpperCase(FieldName)); + + if (result < 0) then + begin + raise ESqliteException.Create('Field not found in dataset: ' + fieldname) + end; +end; + +function TSQLiteUniTable.GetFields(I: cardinal): string; +begin + Result := Sqlite3_ColumnText(fstmt, i); +end; + +function TSQLiteUniTable.Next: boolean; +var + iStepResult: integer; +begin + fEOF := true; + iStepResult := Sqlite3_step(fStmt); + case iStepResult of + SQLITE_ROW: + begin + fEOF := false; + inc(fRow); + end; + SQLITE_DONE: + // we are on the end of dataset + // return EOF=true only + ; + else + begin + SQLite3_reset(fStmt); + fDB.RaiseError('Could not retrieve data', fSQL); + end; + end; + Result := not fEOF; +end; + +end. + diff --git a/mediaplugin/src/lib/SQLite/example/Sunset.jpg b/mediaplugin/src/lib/SQLite/example/Sunset.jpg new file mode 100644 index 00000000..860f6eec Binary files /dev/null and b/mediaplugin/src/lib/SQLite/example/Sunset.jpg differ diff --git a/mediaplugin/src/lib/SQLite/example/TestSqlite.dpr b/mediaplugin/src/lib/SQLite/example/TestSqlite.dpr new file mode 100644 index 00000000..596a3a04 --- /dev/null +++ b/mediaplugin/src/lib/SQLite/example/TestSqlite.dpr @@ -0,0 +1,15 @@ +program TestSqlite; + +uses + Forms, + uTestSqlite in 'uTestSqlite.pas' {Form1}, + SQLiteTable3 in 'SQLiteTable3.pas', + SQLite3 in 'SQLite3.pas'; + +{$R *.res} + +begin + Application.Initialize; + Application.CreateForm(TForm1, Form1); + Application.Run; +end. diff --git a/mediaplugin/src/lib/SQLite/example/TestSqlite.res b/mediaplugin/src/lib/SQLite/example/TestSqlite.res new file mode 100644 index 00000000..4bdd5e2e Binary files /dev/null and b/mediaplugin/src/lib/SQLite/example/TestSqlite.res differ diff --git a/mediaplugin/src/lib/SQLite/example/uTestSqlite.dfm b/mediaplugin/src/lib/SQLite/example/uTestSqlite.dfm new file mode 100644 index 00000000..6b4a2aaf --- /dev/null +++ b/mediaplugin/src/lib/SQLite/example/uTestSqlite.dfm @@ -0,0 +1,110 @@ +object Form1: TForm1 + Left = 199 + Top = 280 + Width = 541 + Height = 308 + Caption = 'Test SQLite 3' + Color = clBtnFace + Font.Charset = DEFAULT_CHARSET + Font.Color = clWindowText + Font.Height = -11 + Font.Name = 'MS Sans Serif' + Font.Style = [] + OldCreateOrder = False + PixelsPerInch = 96 + TextHeight = 13 + object Label1: TLabel + Left = 24 + Top = 104 + Width = 28 + Height = 13 + Caption = 'Notes' + end + object Label2: TLabel + Left = 24 + Top = 44 + Width = 28 + Height = 13 + Caption = 'Name' + end + object Label3: TLabel + Left = 24 + Top = 72 + Width = 40 + Height = 13 + Caption = 'Number:' + end + object Label4: TLabel + Left = 24 + Top = 12 + Width = 11 + Height = 13 + Caption = 'ID' + end + object Image1: TImage + Left = 272 + Top = 12 + Width = 241 + Height = 165 + Proportional = True + Stretch = True + end + object btnTest: TButton + Left = 24 + Top = 224 + Width = 161 + Height = 37 + Caption = 'Test SQLite 3' + TabOrder = 0 + OnClick = btnTestClick + end + object memNotes: TMemo + Left = 24 + Top = 124 + Width = 185 + Height = 89 + Lines.Strings = ( + '') + ScrollBars = ssVertical + TabOrder = 1 + end + object ebName: TEdit + Left = 72 + Top = 40 + Width = 173 + Height = 21 + TabOrder = 2 + end + object ebNumber: TEdit + Left = 72 + Top = 68 + Width = 173 + Height = 21 + TabOrder = 3 + end + object ebID: TEdit + Left = 72 + Top = 12 + Width = 173 + Height = 21 + TabOrder = 4 + end + object btnLoadImage: TButton + Left = 192 + Top = 224 + Width = 157 + Height = 37 + Caption = 'Load image' + TabOrder = 5 + OnClick = btnLoadImageClick + end + object btnDisplayImage: TButton + Left = 360 + Top = 224 + Width = 157 + Height = 37 + Caption = 'Display image' + TabOrder = 6 + OnClick = btnDisplayImageClick + end +end diff --git a/mediaplugin/src/lib/SQLite/example/uTestSqlite.pas b/mediaplugin/src/lib/SQLite/example/uTestSqlite.pas new file mode 100644 index 00000000..484be71c --- /dev/null +++ b/mediaplugin/src/lib/SQLite/example/uTestSqlite.pas @@ -0,0 +1,233 @@ +unit uTestSqlite; + +interface + +uses + Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, + Dialogs, StdCtrls,SQLiteTable3, ExtCtrls, jpeg; + +type + TForm1 = class(TForm) + btnTest: TButton; + memNotes: TMemo; + Label1: TLabel; + Label2: TLabel; + ebName: TEdit; + Label3: TLabel; + ebNumber: TEdit; + Label4: TLabel; + ebID: TEdit; + Image1: TImage; + btnLoadImage: TButton; + btnDisplayImage: TButton; + procedure btnTestClick(Sender: TObject); + procedure btnLoadImageClick(Sender: TObject); + procedure btnDisplayImageClick(Sender: TObject); + private + { Private declarations } + public + { Public declarations } + end; + +var + Form1: TForm1; + +implementation + +{$R *.dfm} + +procedure TForm1.btnTestClick(Sender: TObject); +var +slDBpath: string; +sldb: TSQLiteDatabase; +sltb: TSQLIteTable; +sSQL: String; +Notes: String; + +begin + +slDBPath := ExtractFilepath(application.exename) ++ 'test.db'; + +sldb := TSQLiteDatabase.Create(slDBPath); +try + +if sldb.TableExists('testTable') then begin +sSQL := 'DROP TABLE testtable'; +sldb.execsql(sSQL); +end; + +sSQL := 'CREATE TABLE testtable ([ID] INTEGER PRIMARY KEY,[OtherID] INTEGER NULL,'; +sSQL := sSQL + '[Name] VARCHAR (255),[Number] FLOAT, [notes] BLOB, [picture] BLOB COLLATE NOCASE);'; + +sldb.execsql(sSQL); + +sldb.execsql('CREATE INDEX TestTableName ON [testtable]([Name]);'); + +//begin a transaction +sldb.BeginTransaction; + +sSQL := 'INSERT INTO testtable(Name,OtherID,Number,Notes) VALUES ("Some Name",4,587.6594,"Here are some notes");'; +//do the insert +sldb.ExecSQL(sSQL); + +sSQL := 'INSERT INTO testtable(Name,OtherID,Number,Notes) VALUES ("Another Name",12,4758.3265,"More notes");'; +//do the insert +sldb.ExecSQL(sSQL); + +//end the transaction +sldb.Commit; + +//query the data +sltb := slDb.GetTable('SELECT * FROM testtable'); +try + +if sltb.Count > 0 then +begin +//display first row + +ebName.Text := sltb.FieldAsString(sltb.FieldIndex['Name']); +ebID.Text := inttostr(sltb.FieldAsInteger(sltb.FieldIndex['ID'])); +ebNumber.Text := floattostr( sltb.FieldAsDouble(sltb.FieldIndex['Number'])); +Notes := sltb.FieldAsBlobText(sltb.FieldIndex['Notes']); +memNotes.Text := notes; + +end; + +finally +sltb.Free; +end; + +finally +sldb.Free; + +end; + +end; + +procedure TForm1.btnLoadImageClick(Sender: TObject); +var +slDBpath: string; +sldb: TSQLiteDatabase; +sltb: TSQLIteTable; +iID: integer; +fs: TFileStream; + +begin + +slDBPath := ExtractFilepath(application.exename) ++ 'test.db'; + +if not FileExists(slDBPath) then begin +MessageDLg('Test.db does not exist. Click Test Sqlite 3 to create it.',mtInformation,[mbOK],0); +exit; +end; + +sldb := TSQLiteDatabase.Create(slDBPath); +try + +//get an ID +//query the data +sltb := slDb.GetTable('SELECT ID FROM testtable'); +try + +if sltb.Count = 0 then begin +MessageDLg('There are no rows in the database. Click Test Sqlite 3 to insert a row.',mtInformation,[mbOK],0); +exit; +end; + +iID := sltb.FieldAsInteger(sltb.FieldIndex['ID']); + +finally +sltb.Free; +end; + +//load an image +fs := TFileStream.Create(ExtractFileDir(application.ExeName) + '\sunset.jpg',fmOpenRead); +try + +//insert the image into the db +sldb.UpdateBlob('UPDATE testtable set picture = ? WHERE ID = ' + inttostr(iID),fs); + +finally +fs.Free; +end; + +finally +sldb.Free; + +end; + +end; + +procedure TForm1.btnDisplayImageClick(Sender: TObject); +var +slDBpath: string; +sldb: TSQLiteDatabase; +sltb: TSQLIteTable; +iID: integer; +ms: TMemoryStream; +pic: TJPegImage; + +begin + +slDBPath := ExtractFilepath(application.exename) ++ 'test.db'; + +if not FileExists(slDBPath) then begin +MessageDLg('Test.db does not exist. Click Test Sqlite 3 to create it, then Load image to load an image.',mtInformation,[mbOK],0); +exit; +end; + +sldb := TSQLiteDatabase.Create(slDBPath); +try + +//get an ID +//query the data +sltb := slDb.GetTable('SELECT ID FROM testtable'); +try + +if not sltb.Count = 0 then begin +MessageDLg('No rows in the test database. Click Test Sqlite 3 to insert a row, then Load image to load an image.',mtInformation,[mbOK],0); +exit; +end; + +iID := sltb.FieldAsInteger(sltb.FieldIndex['ID']); + +finally +sltb.Free; +end; + +sltb := sldb.GetTable('SELECT picture FROM testtable where ID = ' + inttostr(iID)); +try + +ms := sltb.FieldAsBlob(sltb.FieldIndex['picture']); +//note that the memory stream is freed when the TSqliteTable is destroyed. + +if (ms = nil) then begin +MessageDLg('No image in the test database. Click Load image to load an image.',mtInformation,[mbOK],0); +exit; +end; + +ms.Position := 0; + +pic := TJPEGImage.Create; +pic.LoadFromStream(ms); + +self.Image1.Picture.Graphic := pic; + +pic.Free; + +finally +sltb.Free; +end; + +finally +sldb.Free; + +end; + + +end; + +end. diff --git a/mediaplugin/src/lib/SQLite/readme.txt b/mediaplugin/src/lib/SQLite/readme.txt new file mode 100644 index 00000000..7998d17f --- /dev/null +++ b/mediaplugin/src/lib/SQLite/readme.txt @@ -0,0 +1,93 @@ +5 June 2008 +Updated DLL to version 3.5.9 (built with MSVC 6.0) +Added code from Andrew Retmanski to support prepared queries (see comments in SQLIteTable3.pas +Lukas added support for named parameters - see comments in code +User nebula enhanced error message; also modified code to call sqlite3_reset before checking error message + + +27 Aug 2007 +Amended TSQLiteDatabase constructor to convert filename to UTF8,for compatibility with latest SQLite3 DLL. + +Updated DLL to version 3.4.2 (built with MSVC 6.0). + +14 Aug 2005 + +The following changes were made by Lukas Gebauer (geby@volny.cz). In addition, some changes from a previous D5-compatible version were merged, and the supplied sqlite3.dll is updated to version 3.2.2 + +Notes from Lukas: + +- added support for delphi 4+ + +- datatype constants matches SQlite datatypes contants. (otherwise in some situations you got bad column datatype!) + +- removed dependency on strutils + +- code is reformatted to better look (official borland formatting rules) + +- added some pragma's after database is open (temp is in memory) + +- TSQLiteDatabase.GetTableValue(const SQL: string): int64 for easy call of SQL commands what returning one number only. (like select +count(*)...) + +- TSQLiteDatabase.GetTableString(const SQL: string): String for easy call of SQL commands what returning one string only. (like PRAGMA +integrity_check) + +- TSQLiteDatabase.SetTimeout(Value: integer); you can set timeout for accessing to some table. Good for database sharing! + +- TSQLiteDatabase.version: string; returns SQLITE version string + +- removed bool fieldtype (it is not natural SQLite3 type) + +- fild type detection by Sqite3_columnType knows REAL too. + +- integer filedtype is based on Int64 + +- GetFields can get data from any supported fieldtype + +- changed some integers to cardinal for avoid signed and unsigned mismatch + +- TSqliteTable.FieldAsInteger(I: cardinal): int64; returns int64 + + +3 May 2005 Fixed bug where strupper called on column type before checking for nil + +2 May 2005 Add extra check for nil in TSqliteTable.Destroy, thanks to Tim Maddrell + +22 Apr 2005 Revise TSqliteTable.Destroy to fix memory leak with dtStr type (thanks to +Jose Brito) + +21 Apr 2005 Quick revision to fix case sensitivity in detecting column type, +and remove PRAGMA full_column_names = 1 which is deprecated. Warning: may break code. Fix your SQL code so that all column names in a result set are unique. + +21 Feb 2005 Sqlite DLL now 3.1.3 + +19 Feb 2005 Revised for Sqlite 3.1.2 + +21 Dec 2004 First public release + +The following notice appears in the Sqlite source code: + +* +** 2001 September 15 +** +** +** The author disclaims copyright to this source code. In place of + +** a legal notice, here is a blessing: + +** + May you do good and not evil. + +** May you find forgiveness for yourself and forgive others. + +** May you share freely, never taking more than you give. + + +For more information about SQLite, see http://www.sqlite.org + +For more information about this simple wrapper, see http://www.itwriting.com/sqlitesimple.php + + + + + -- cgit v1.2.3