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dbconnection.pas
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dbconnection.pas
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unit dbconnection;
interface
uses
Classes, SysUtils, windows, dbstructures, SynRegExpr, Generics.Collections, Generics.Defaults,
DateUtils, Types, Math, Dialogs, ADODB, DB, DBCommon, ComObj, Graphics, ExtCtrls, StrUtils,
gnugettext, AnsiStrings, Controls, Forms, System.IOUtils;
type
{$M+} // Needed to add published properties
{ TDBObjectList and friends }
TListNodeType = (lntNone, lntDb, lntGroup, lntTable, lntView, lntFunction, lntProcedure, lntTrigger, lntEvent, lntColumn);
TListNodeTypes = Set of TListNodeType;
TDBConnection = class;
TConnectionParameters = class;
TDBQuery = class;
TDBQueryList = TObjectList<TDBQuery>;
TDBObject = class(TPersistent)
private
FCreateCode: String;
FCreateCodeFetched: Boolean;
FWasSelected: Boolean;
FConnection: TDBConnection;
function GetObjType: String;
function GetImageIndex: Integer;
function GetOverlayImageIndex: Integer;
function GetPath: String;
procedure SetCreateCode(Value: String);
public
// Table options:
Name, Schema, Database, Column, Engine, Comment, RowFormat, CreateOptions, Collation: String;
Created, Updated, LastChecked: TDateTime;
Rows, Size, Version, AvgRowLen, MaxDataLen, IndexLen, DataLen, DataFree, AutoInc, CheckSum: Int64;
// Routine options:
Body, Definer, Returns, DataAccess, Security, ArgTypes: String;
Deterministic: Boolean;
NodeType, GroupType: TListNodeType;
constructor Create(OwnerConnection: TDBConnection);
procedure Assign(Source: TPersistent); override;
procedure Drop;
function IsSameAs(CompareTo: TDBObject): Boolean;
function QuotedDatabase(AlwaysQuote: Boolean=True): String;
function QuotedName(AlwaysQuote: Boolean=True; SeparateSegments: Boolean=True): String;
function QuotedDbAndTableName(AlwaysQuote: Boolean=True): String;
function QuotedColumn(AlwaysQuote: Boolean=True): String;
function RowCount: Int64;
function GetCreateCode: String; overload;
function GetCreateCode(RemoveAutoInc, RemoveDefiner: Boolean): String; overload;
property ObjType: String read GetObjType;
property ImageIndex: Integer read GetImageIndex;
property OverlayImageIndex: Integer read GetOverlayImageIndex;
property Path: String read GetPath;
property CreateCode: String read GetCreateCode write SetCreateCode;
property WasSelected: Boolean read FWasSelected write FWasSelected;
property Connection: TDBConnection read FConnection;
end;
PDBObject = ^TDBObject;
TDBObjectList = class(TObjectList<TDBObject>)
private
FDatabase: String;
FDataSize: Int64;
FLargestObjectSize: Int64;
FLastUpdate: TDateTime;
FCollation: String;
FOnlyNodeType: TListNodeType;
public
property Database: String read FDatabase;
property DataSize: Int64 read FDataSize;
property LargestObjectSize: Int64 read FLargestObjectSize;
property LastUpdate: TDateTime read FLastUpdate;
property Collation: String read FCollation;
property OnlyNodeType: TListNodeType read FOnlyNodeType;
end;
TDatabaseCache = class(TObjectList<TDBObjectList>); // A list of db object lists, used for caching
TDBObjectComparer = class(TComparer<TDBObject>)
function Compare(const Left, Right: TDBObject): Integer; override;
end;
TDBObjectDropComparer = class(TComparer<TDBObject>)
function Compare(const Left, Right: TDBObject): Integer; override;
end;
// General purpose editing status flag
TEditingStatus = (esUntouched, esModified, esDeleted, esAddedUntouched, esAddedModified, esAddedDeleted);
TOidStringPairs = TDictionary<POid, String>;
TColumnPart = (cpAll, cpName, cpType, cpAllowNull, cpDefault, cpVirtuality, cpComment, cpCollation);
TColumnParts = Set of TColumnPart;
TColumnDefaultType = (cdtNothing, cdtText, cdtNull, cdtAutoInc, cdtExpression);
// Column object, many of them in a TObjectList
TTableColumn = class(TObject)
private
FConnection: TDBConnection;
procedure SetStatus(Value: TEditingStatus);
public
Name, OldName: String;
DataType, OldDataType: TDBDatatype;
LengthSet: String;
Unsigned, AllowNull, ZeroFill, LengthCustomized: Boolean;
DefaultType: TColumnDefaultType;
DefaultText: String;
OnUpdateType: TColumnDefaultType;
OnUpdateText: String;
Comment, Charset, Collation, Expression, Virtuality: String;
FStatus: TEditingStatus;
constructor Create(AOwner: TDBConnection);
destructor Destroy; override;
function SQLCode(OverrideCollation: String=''; Parts: TColumnParts=[cpAll]): String;
function ValueList: TStringList;
function CastAsText: String;
property Status: TEditingStatus read FStatus write SetStatus;
property Connection: TDBConnection read FConnection;
end;
PTableColumn = ^TTableColumn;
TTableColumnList = TObjectList<TTableColumn>;
TTableKey = class(TObject)
private
FConnection: TDBConnection;
function GetImageIndex: Integer;
public
Name, OldName: String;
IndexType, OldIndexType, Algorithm, Comment: String;
Columns, SubParts: TStringList;
Modified, Added: Boolean;
constructor Create(AOwner: TDBConnection);
destructor Destroy; override;
procedure Modification(Sender: TObject);
function SQLCode: String;
property ImageIndex: Integer read GetImageIndex;
end;
TTableKeyList = TObjectList<TTableKey>;
// Helper object to manage foreign keys in a TObjectList
TForeignKey = class(TObject)
private
FConnection: TDBConnection;
public
KeyName, OldKeyName, ReferenceTable, OnUpdate, OnDelete: String;
Columns, ForeignColumns: TStringList;
Modified, Added, KeyNameWasCustomized: Boolean;
constructor Create(AOwner: TDBConnection);
destructor Destroy; override;
function SQLCode(IncludeSymbolName: Boolean): String;
end;
TForeignKeyList = TObjectList<TForeignKey>;
TRoutineParam = class(TObject)
public
Name, Context, Datatype: String;
end;
TRoutineParamList = TObjectList<TRoutineParam>;
// Structures for in-memory changes of a TDBQuery
TGridValue = class(TObject)
public
NewText, OldText: String;
NewIsNull, OldIsNull: Boolean;
NewIsFunction, OldIsFunction: Boolean;
Modified: Boolean;
destructor Destroy; override;
end;
TGridRow = class(TObjectList<TGridValue>)
public
RecNo: Int64;
Inserted: Boolean;
end;
TGridRows = class(TObjectList<TGridRow>);
// PLink.exe related
TProcessPipe = class(TObject)
public
ReadHandle: THandle;
WriteHandle: THandle;
constructor Create;
destructor Destroy; override;
end;
TPlink = class(TObject)
private
FProcessInfo: TProcessInformation;
FInPipe: TProcessPipe;
FOutPipe: TProcessPipe;
FErrorPipe: TProcessPipe;
FConnection: TDBConnection;
function ReadPipe(const Pipe: TProcessPipe): String;
function AsciiToAnsi(Text: AnsiString): AnsiString;
function CleanEscSeq(const Buffer: String): String;
procedure SendText(Text: String);
public
procedure Connect;
constructor Create(Connection: TDBConnection);
destructor Destroy; override;
end;
{ TConnectionParameters and friends }
TNetType = (ntMySQL_TCPIP, ntMySQL_NamedPipe, ntMySQL_SSHtunnel,
ntMSSQL_NamedPipe, ntMSSQL_TCPIP, ntMSSQL_SPX, ntMSSQL_VINES, ntMSSQL_RPC,
ntPgSQL_TCPIP, ntPgSQL_SSHtunnel,
ntSQLite);
TNetTypeGroup = (ngMySQL, ngMSSQL, ngPgSQL, ngSQLite);
TNetGroupLibs = TDictionary<TNetTypeGroup, TStringList>;
TConnectionParameters = class(TObject)
strict private
FNetType: TNetType;
FHostname, FUsername, FPassword, FAllDatabases, FLibraryOrProvider, FComment, FStartupScriptFilename,
FSessionPath, FSSLPrivateKey, FSSLCertificate, FSSLCACertificate, FSSLCipher, FServerVersion,
FSSHHost, FSSHUser, FSSHPassword, FSSHPlinkExe, FSSHPrivateKey: String;
FPort, FSSHPort, FSSHLocalPort, FSSHTimeout, FCounter, FQueryTimeout, FKeepAlive: Integer;
FLoginPrompt, FCompressed, FLocalTimeZone, FFullTableStatus,
FWindowsAuth, FWantSSL, FIsFolder, FCleartextPluginEnabled: Boolean;
FSessionColor: TColor;
FLastConnect: TDateTime;
class var FLibraries: TNetGroupLibs;
function GetImageIndex: Integer;
function GetSessionName: String;
public
constructor Create; overload;
constructor Create(SessionRegPath: String); overload;
procedure SaveToRegistry;
function CreateConnection(AOwner: TComponent): TDBConnection;
function CreateQuery(Connection: TDbConnection): TDBQuery;
function NetTypeName(LongFormat: Boolean): String;
function IsCompatibleToWin10S: Boolean;
function GetNetTypeGroup: TNetTypeGroup;
function IsMySQL: Boolean;
function IsMSSQL: Boolean;
function IsPostgreSQL: Boolean;
function IsSQLite: Boolean;
function IsMariaDB: Boolean;
function IsPercona: Boolean;
function IsTokudb: Boolean;
function IsInfiniDB: Boolean;
function IsInfobright: Boolean;
function IsAzure: Boolean;
function IsMemSQL: Boolean;
function IsRedshift: Boolean;
property ImageIndex: Integer read GetImageIndex;
function GetLibraries: TStringList;
function DefaultLibrary: String;
function DefaultPort: Integer;
function DefaultUsername: String;
published
property IsFolder: Boolean read FIsFolder write FIsFolder;
property NetType: TNetType read FNetType write FNetType;
property NetTypeGroup: TNetTypeGroup read GetNetTypeGroup;
property ServerVersion: String read FServerVersion write FServerVersion;
property Counter: Integer read FCounter;
property LastConnect: TDateTime read FLastConnect;
property SessionPath: String read FSessionPath write FSessionPath;
property SessionName: String read GetSessionName;
property SessionColor: TColor read FSessionColor write FSessionColor;
property Hostname: String read FHostname write FHostname;
property Port: Integer read FPort write FPort;
property Username: String read FUsername write FUsername;
property Password: String read FPassword write FPassword;
property LoginPrompt: Boolean read FLoginPrompt write FLoginPrompt;
property WindowsAuth: Boolean read FWindowsAuth write FWindowsAuth;
property CleartextPluginEnabled: Boolean read FCleartextPluginEnabled write FCleartextPluginEnabled;
property AllDatabasesStr: String read FAllDatabases write FAllDatabases;
property LibraryOrProvider: String read FLibraryOrProvider write FLibraryOrProvider;
property Comment: String read FComment write FComment;
property StartupScriptFilename: String read FStartupScriptFilename write FStartupScriptFilename;
property QueryTimeout: Integer read FQueryTimeout write FQueryTimeout;
property KeepAlive: Integer read FKeepAlive write FKeepAlive;
property Compressed: Boolean read FCompressed write FCompressed;
property LocalTimeZone: Boolean read FLocalTimeZone write FLocalTimeZone;
property FullTableStatus: Boolean read FFullTableStatus write FFullTableStatus;
property SSHHost: String read FSSHHost write FSSHHost;
property SSHPort: Integer read FSSHPort write FSSHPort;
property SSHUser: String read FSSHUser write FSSHUser;
property SSHPassword: String read FSSHPassword write FSSHPassword;
property SSHTimeout: Integer read FSSHTimeout write FSSHTimeout;
property SSHPrivateKey: String read FSSHPrivateKey write FSSHPrivateKey;
property SSHLocalPort: Integer read FSSHLocalPort write FSSHLocalPort;
property SSHPlinkExe: String read FSSHPlinkExe write FSSHPlinkExe;
property WantSSL: Boolean read FWantSSL write FWantSSL;
property SSLPrivateKey: String read FSSLPrivateKey write FSSLPrivateKey;
property SSLCertificate: String read FSSLCertificate write FSSLCertificate;
property SSLCACertificate: String read FSSLCACertificate write FSSLCACertificate;
property SSLCipher: String read FSSLCipher write FSSLCipher;
end;
PConnectionParameters = ^TConnectionParameters;
{ TDBConnection }
TDBLogCategory = (lcInfo, lcSQL, lcUserFiredSQL, lcError, lcDebug, lcScript);
TDBLogEvent = procedure(Msg: String; Category: TDBLogCategory=lcInfo; Connection: TDBConnection=nil) of object;
TDBEvent = procedure(Connection: TDBConnection; Database: String) of object;
TDBDataTypeArray = Array of TDBDataType;
TSQLSpecifityId = (spDatabaseTable, spDatabaseTableId,
spDbObjectsTable, spDbObjectsCreateCol, spDbObjectsUpdateCol, spDbObjectsTypeCol,
spEmptyTable, spRenameTable, spRenameView, spCurrentUserHost,
spAddColumn, spChangeColumn,
spSessionVariables, spGlobalVariables,
spISTableSchemaCol,
spUSEQuery, spKillQuery, spKillProcess,
spFuncLength, spFuncCeil,
spLockedTables);
TDBConnection = class(TComponent)
private
FActive: Boolean;
FConnectionStarted: Cardinal;
FServerUptime: Integer;
FServerDateTimeOnStartup: String;
FParameters: TConnectionParameters;
FPlink: TPlink;
FLoginPromptDone: Boolean;
FDatabase: String;
FAllDatabases: TStringList;
FLogPrefix: String;
FOnLog: TDBLogEvent;
FOnConnected: TDBEvent;
FOnDatabaseChanged: TDBEvent;
FOnObjectnamesChanged: TDBEvent;
FRowsFound: Int64;
FRowsAffected: Int64;
FWarningCount: Cardinal;
FServerOS: String;
FServerVersionUntouched: String;
FRealHostname: String;
FLastQueryDuration, FLastQueryNetworkDuration: Cardinal;
FLastQuerySQL: String;
FIsUnicode: Boolean;
FIsSSL: Boolean;
FTableEngines: TStringList;
FTableEngineDefault: String;
FCollationTable: TDBQuery;
FCharsetTable: TDBQuery;
FSessionVariables: TDBQuery;
FInformationSchemaObjects: TStringList;
FDatabaseCache: TDatabaseCache;
FCurrentUserHostCombination: String;
FAllUserHostCombinations: TStringList;
FLockedByThread: TThread;
FQuoteChar: Char;
FQuoteChars: String;
FDatatypes: TDBDataTypeArray;
FThreadID: Int64;
FSQLSpecifities: Array[TSQLSpecifityId] of String;
FKeepAliveTimer: TTimer;
FFavorites: TStringList;
FPrefetchResults: TDBQueryList;
procedure SetActive(Value: Boolean); virtual; abstract;
procedure DoBeforeConnect; virtual;
procedure DoAfterConnect; virtual;
procedure DetectUSEQuery(SQL: String); virtual;
procedure SetDatabase(Value: String);
function GetThreadId: Int64; virtual; abstract;
function GetCharacterSet: String; virtual;
procedure SetCharacterSet(CharsetName: String); virtual;
function GetLastErrorCode: Cardinal; virtual; abstract;
function GetLastErrorMsg: String; virtual; abstract;
function GetAllDatabases: TStringList; virtual;
function GetTableEngines: TStringList; virtual;
function GetCollationTable: TDBQuery; virtual;
function GetCollationList: TStringList;
function GetCharsetTable: TDBQuery; virtual;
function GetCharsetList: TStringList;
function GetInformationSchemaObjects: TStringList; virtual;
function GetConnectionUptime: Integer;
function GetServerUptime: Integer;
function GetServerNow: TDateTime;
function GetCurrentUserHostCombination: String;
function GetAllUserHostCombinations: TStringList;
function DecodeAPIString(a: AnsiString): String;
function ExtractIdentifier(var SQL: String): String;
function GetRowCount(Obj: TDBObject): Int64; virtual; abstract;
procedure ClearCache(IncludeDBObjects: Boolean);
procedure FetchDbObjects(db: String; var Cache: TDBObjectList); virtual; abstract;
procedure SetLockedByThread(Value: TThread); virtual;
procedure KeepAliveTimerEvent(Sender: TObject);
procedure Drop(Obj: TDBObject); virtual;
procedure PrefetchResults(SQL: String);
procedure FreeResults(Results: TDBQuery);
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
procedure Query(SQL: String; DoStoreResult: Boolean=False; LogCategory: TDBLogCategory=lcSQL); virtual; abstract;
procedure Log(Category: TDBLogCategory; Msg: String);
function EscapeString(Text: String; ProcessJokerChars: Boolean=False; DoQuote: Boolean=True): String;
function QuoteIdent(Identifier: String; AlwaysQuote: Boolean=True; Glue: Char=#0): String;
function DeQuoteIdent(Identifier: String; Glue: Char=#0): String;
function QuotedDbAndTableName(DB, Obj: String): String;
function FindObject(DB, Obj: String): TDBObject;
function escChars(const Text: String; EscChar, Char1, Char2, Char3, Char4: Char): String;
function UnescapeString(Text: String): String;
function ExtractLiteral(var SQL: String; Prefix: String): String;
function GetResults(SQL: String): TDBQuery;
function GetCol(SQL: String; Column: Integer=0): TStringList;
function GetVar(SQL: String; Column: Integer=0): String; overload;
function GetVar(SQL: String; Column: String): String; overload;
function Ping(Reconnect: Boolean): Boolean; virtual; abstract;
function RefreshAllDatabases: TStringList;
function GetDBObjects(db: String; Refresh: Boolean=False; OnlyNodeType: TListNodeType=lntNone): TDBObjectList;
function DbObjectsCached(db: String): Boolean;
function ParseDateTime(Str: String): TDateTime;
function GetKeyColumns(Columns: TTableColumnList; Keys: TTableKeyList): TStringList;
function ConnectionInfo: TStringList; virtual;
function GetLastResults: TDBQueryList; virtual;
function GetCreateCode(Obj: TDBObject): String; virtual;
procedure PrefetchCreateCode(Objects: TDBObjectList);
function GetSessionVariables(Refresh: Boolean): TDBQuery;
function GetSessionVariable(VarName: String; DefaultValue: String=''; Refresh: Boolean=False): String;
function MaxAllowedPacket: Int64; virtual;
function GetSQLSpecifity(Specifity: TSQLSpecifityId): String;
function ExplainAnalyzer(SQL, DatabaseName: String): Boolean; virtual;
function GetDateTimeValue(Input: String; Datatype: TDBDatatypeIndex): String;
procedure ClearDbObjects(db: String);
procedure ClearAllDbObjects;
procedure ParseTableStructure(CreateTable: String; Columns: TTableColumnList; Keys: TTableKeyList; ForeignKeys: TForeignKeyList);
procedure ParseViewStructure(CreateCode: String; DBObj: TDBObject; Columns: TTableColumnList;
var Algorithm, Definer, SQLSecurity, CheckOption, SelectCode: String);
procedure ParseRoutineStructure(Obj: TDBObject; Parameters: TRoutineParamList);
procedure PurgePrefetchResults;
function GetDatatypeByName(var DataType: String; DeleteFromSource: Boolean; Identifier: String=''): TDBDatatype;
function GetDatatypeByNativeType(NativeType: Integer; Identifier: String=''): TDBDatatype;
function ApplyLimitClause(QueryType, QueryBody: String; Limit, Offset: Int64): String;
function LikeClauseTail: String;
property Parameters: TConnectionParameters read FParameters write FParameters;
property ThreadId: Int64 read GetThreadId;
property ConnectionUptime: Integer read GetConnectionUptime;
property ServerUptime: Integer read GetServerUptime;
property ServerNow: TDateTime read GetServerNow;
property CharacterSet: String read GetCharacterSet write SetCharacterSet;
property LastErrorCode: Cardinal read GetLastErrorCode;
property LastErrorMsg: String read GetLastErrorMsg;
property ServerOS: String read FServerOS;
property ServerVersionUntouched: String read FServerVersionUntouched;
property QuoteChars: String read FQuoteChars;
function ServerVersionStr: String;
function ServerVersionInt: Integer;
function NdbClusterVersionInt: Integer;
property RowsFound: Int64 read FRowsFound;
property RowsAffected: Int64 read FRowsAffected;
property WarningCount: Cardinal read FWarningCount;
property LastQueryDuration: Cardinal read FLastQueryDuration;
property LastQueryNetworkDuration: Cardinal read FLastQueryNetworkDuration;
property IsUnicode: Boolean read FIsUnicode;
property IsSSL: Boolean read FIsSSL;
property AllDatabases: TStringList read GetAllDatabases;
property TableEngines: TStringList read GetTableEngines;
property TableEngineDefault: String read FTableEngineDefault;
property CollationTable: TDBQuery read GetCollationTable;
property CollationList: TStringList read GetCollationList;
property CharsetTable: TDBQuery read GetCharsetTable;
property CharsetList: TStringList read GetCharsetList;
property InformationSchemaObjects: TStringList read GetInformationSchemaObjects;
function ResultCount: Integer;
property CurrentUserHostCombination: String read GetCurrentUserHostCombination;
property AllUserHostCombinations: TStringList read GetAllUserHostCombinations;
property LockedByThread: TThread read FLockedByThread write SetLockedByThread;
property Datatypes: TDBDataTypeArray read FDatatypes;
property Favorites: TStringList read FFavorites;
function GetLockedTableCount(db: String): Integer;
function IdentifierEquals(Ident1, Ident2: String): Boolean;
published
property Active: Boolean read FActive write SetActive default False;
property Database: String read FDatabase write SetDatabase;
property LogPrefix: String read FLogPrefix write FLogPrefix;
property OnLog: TDBLogEvent read FOnLog write FOnLog;
property OnConnected: TDBEvent read FOnConnected write FOnConnected;
property OnDatabaseChanged: TDBEvent read FOnDatabaseChanged write FOnDatabaseChanged;
property OnObjectnamesChanged: TDBEvent read FOnObjectnamesChanged write FOnObjectnamesChanged;
end;
TDBConnectionList = TObjectList<TDBConnection>;
{ TMySQLConnection }
TMySQLRawResults = Array of PMYSQL_RES;
TMySQLConnection = class(TDBConnection)
private
FHandle: PMYSQL;
FLib: TMySQLLib;
FLastRawResults: TMySQLRawResults;
FStatementNum: Cardinal;
procedure SetActive(Value: Boolean); override;
procedure DoBeforeConnect; override;
procedure DoAfterConnect; override;
function GetThreadId: Int64; override;
function GetCharacterSet: String; override;
procedure SetCharacterSet(CharsetName: String); override;
function GetLastErrorCode: Cardinal; override;
function GetLastErrorMsg: String; override;
function GetAllDatabases: TStringList; override;
function GetTableEngines: TStringList; override;
function GetCollationTable: TDBQuery; override;
function GetCharsetTable: TDBQuery; override;
function GetCreateViewCode(Database, Name: String): String;
function GetRowCount(Obj: TDBObject): Int64; override;
procedure FetchDbObjects(db: String; var Cache: TDBObjectList); override;
procedure SetLockedByThread(Value: TThread); override;
public
constructor Create(AOwner: TComponent); override;
property Lib: TMySQLLib read FLib;
procedure Query(SQL: String; DoStoreResult: Boolean=False; LogCategory: TDBLogCategory=lcSQL); override;
function Ping(Reconnect: Boolean): Boolean; override;
function ConnectionInfo: TStringList; override;
function GetCreateCode(Obj: TDBObject): String; override;
property LastRawResults: TMySQLRawResults read FLastRawResults;
function MaxAllowedPacket: Int64; override;
function ExplainAnalyzer(SQL, DatabaseName: String): Boolean; override;
end;
TAdoRawResults = Array of _RecordSet;
TAdoDBConnection = class(TDBConnection)
private
FAdoHandle: TAdoConnection;
FLastRawResults: TAdoRawResults;
FLastError: String;
procedure SetActive(Value: Boolean); override;
procedure DoAfterConnect; override;
function GetThreadId: Int64; override;
function GetLastErrorCode: Cardinal; override;
function GetLastErrorMsg: String; override;
function GetAllDatabases: TStringList; override;
function GetCollationTable: TDBQuery; override;
function GetCharsetTable: TDBQuery; override;
function GetInformationSchemaObjects: TStringList; override;
function GetRowCount(Obj: TDBObject): Int64; override;
procedure FetchDbObjects(db: String; var Cache: TDBObjectList); override;
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
procedure Query(SQL: String; DoStoreResult: Boolean=False; LogCategory: TDBLogCategory=lcSQL); override;
function Ping(Reconnect: Boolean): Boolean; override;
function ConnectionInfo: TStringList; override;
function GetLastResults: TDBQueryList; override;
property LastRawResults: TAdoRawResults read FLastRawResults;
end;
TPGRawResults = Array of PPGresult;
TPQerrorfields = (PG_DIAG_SEVERITY, PG_DIAG_SQLSTATE, PG_DIAG_MESSAGE_PRIMARY, PG_DIAG_MESSAGE_DETAIL, PG_DIAG_MESSAGE_HINT, PG_DIAG_STATEMENT_POSITION, PG_DIAG_INTERNAL_POSITION, PG_DIAG_INTERNAL_QUERY, PG_DIAG_CONTEXT, PG_DIAG_SOURCE_FILE, PG_DIAG_SOURCE_LINE, PG_DIAG_SOURCE_FUNCTION);
TPgConnection = class(TDBConnection)
private
FHandle: PPGconn;
FLib: TPostgreSQLLib;
FLastRawResults: TPGRawResults;
FRegClasses: TOidStringPairs;
procedure SetActive(Value: Boolean); override;
procedure DoBeforeConnect; override;
function GetThreadId: Int64; override;
procedure SetCharacterSet(CharsetName: String); override;
function GetLastErrorCode: Cardinal; override;
function GetLastErrorMsg: String; override;
function GetAllDatabases: TStringList; override;
function GetCharsetTable: TDBQuery; override;
procedure FetchDbObjects(db: String; var Cache: TDBObjectList); override;
procedure Drop(Obj: TDBObject); override;
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
property Lib: TPostgreSQLLib read FLib;
procedure Query(SQL: String; DoStoreResult: Boolean=False; LogCategory: TDBLogCategory=lcSQL); override;
function Ping(Reconnect: Boolean): Boolean; override;
function ConnectionInfo: TStringList; override;
function GetRowCount(Obj: TDBObject): Int64; override;
property LastRawResults: TPGRawResults read FLastRawResults;
property RegClasses: TOidStringPairs read FRegClasses;
end;
TSQLiteConnection = class;
TSQLiteGridRows = class(TGridRows)
private
FConnection: TSQLiteConnection;
public
Statement: Psqlite3_stmt; // Used for querying result structures
constructor Create(AOwner: TSQLiteConnection);
destructor Destroy; override;
end;
TSQLiteRawResults = Array of TSQLiteGridRows;
TSQLiteConnection = class(TDBConnection)
private
FHandle: Psqlite3;
FLib: TSQLiteLib;
FLastRawResults: TSQLiteRawResults;
procedure SetActive(Value: Boolean); override;
procedure DoBeforeConnect; override;
function GetThreadId: Int64; override;
function GetLastErrorCode: Cardinal; override;
function GetLastErrorMsg: String; override;
function GetAllDatabases: TStringList; override;
function GetCharsetTable: TDBQuery; override;
procedure FetchDbObjects(db: String; var Cache: TDBObjectList); override;
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
property Lib: TSQLiteLib read FLib;
procedure Query(SQL: String; DoStoreResult: Boolean=False; LogCategory: TDBLogCategory=lcSQL); override;
function Ping(Reconnect: Boolean): Boolean; override;
function GetCreateCode(Obj: TDBObject): String; override;
function GetRowCount(Obj: TDBObject): Int64; override;
property LastRawResults: TSQLiteRawResults read FLastRawResults;
end;
{ TDBQuery }
TDBQuery = class(TComponent)
private
FSQL: String;
FConnection: TDBConnection;
FRecNo,
FRecordCount: Int64;
FColumnNames: TStringList;
FColumnOrgNames: TStringList;
FAutoIncrementColumn: Integer;
FColumnTypes: Array of TDBDatatype;
FColumnLengths: TIntegerDynArray;
FColumnFlags: TCardinalDynArray;
FCurrentUpdateRow: TGridRow;
FEof: Boolean;
FStoreResult: Boolean;
FColumns: TTableColumnList;
FKeys: TTableKeyList;
FForeignKeys: TForeignKeyList;
FEditingPrepared: Boolean;
FUpdateData: TGridRows;
FDBObject: TDBObject;
FFormatSettings: TFormatSettings;
procedure SetRecNo(Value: Int64); virtual; abstract;
function ColumnExists(Column: Integer): Boolean;
procedure SetColumnOrgNames(Value: TStringList);
procedure SetDBObject(Value: TDBObject);
procedure CreateUpdateRow;
function GetKeyColumns: TStringList;
function GridQuery(QueryType, QueryBody: String): String;
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
procedure Execute(AddResult: Boolean=False; UseRawResult: Integer=-1); virtual; abstract;
procedure First;
procedure Next;
function ColumnCount: Integer;
function GetColBinData(Column: Integer; var baData: TBytes): Boolean; virtual;
function Col(Column: Integer; IgnoreErrors: Boolean=False): String; overload; virtual; abstract;
function Col(ColumnName: String; IgnoreErrors: Boolean=False): String; overload;
function ColumnLengths(Column: Integer): Int64; virtual;
function HexValue(Column: Integer; IgnoreErrors: Boolean=False): String; overload;
function HexValue(BinValue: String): String; overload;
function HexValue(var ByteData: TBytes): String; overload;
function DataType(Column: Integer): TDBDataType;
function MaxLength(Column: Integer): Int64;
function ValueList(Column: Integer): TStringList;
function ColExists(Column: String): Boolean;
function ColIsPrimaryKeyPart(Column: Integer): Boolean; virtual; abstract;
function ColIsUniqueKeyPart(Column: Integer): Boolean; virtual; abstract;
function ColIsKeyPart(Column: Integer): Boolean; virtual; abstract;
function ColIsVirtual(Column: Integer): Boolean;
function ColAttributes(Column: Integer): TTableColumn;
function IsNull(Column: Integer): Boolean; overload; virtual; abstract;
function IsNull(Column: String): Boolean; overload;
function IsFunction(Column: Integer): Boolean;
function HasResult: Boolean; virtual; abstract;
function GetWhereClause: String;
procedure CheckEditable;
procedure DeleteRow;
function InsertRow: Int64;
procedure SetCol(Column: Integer; NewText: String; Null: Boolean; IsFunction: Boolean);
function EnsureFullRow(Refresh: Boolean): Boolean;
function HasFullData: Boolean;
function Modified(Column: Integer): Boolean; overload;
function Modified: Boolean; overload;
function Inserted: Boolean;
function SaveModifications: Boolean;
function DatabaseName: String; virtual; abstract;
function TableName: String; virtual;
function QuotedDbAndTableName: String;
procedure DiscardModifications;
procedure PrepareColumnAttributes;
procedure PrepareEditing;
property RecNo: Int64 read FRecNo write SetRecNo;
property Eof: Boolean read FEof;
property RecordCount: Int64 read FRecordCount;
property ColumnNames: TStringList read FColumnNames;
property StoreResult: Boolean read FStoreResult write FStoreResult;
property ColumnOrgNames: TStringList read FColumnOrgNames write SetColumnOrgNames;
property AutoIncrementColumn: Integer read FAutoIncrementColumn;
property DBObject: TDBObject read FDBObject write SetDBObject;
property SQL: String read FSQL write FSQL;
property Connection: TDBConnection read FConnection;
end;
PDBQuery = ^TDBQuery;
{ TMySQLQuery }
TMySQLQuery = class(TDBQuery)
private
FConnection: TMySQLConnection;
FResultList: TMySQLRawResults;
FCurrentResults: PMYSQL_RES;
FCurrentRow: PMYSQL_ROW;
procedure SetRecNo(Value: Int64); override;
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
procedure Execute(AddResult: Boolean=False; UseRawResult: Integer=-1); override;
function GetColBinData(Column: Integer; var baData: TBytes): Boolean; override;
function Col(Column: Integer; IgnoreErrors: Boolean=False): String; overload; override;
function ColIsPrimaryKeyPart(Column: Integer): Boolean; override;
function ColIsUniqueKeyPart(Column: Integer): Boolean; override;
function ColIsKeyPart(Column: Integer): Boolean; override;
function IsNull(Column: Integer): Boolean; overload; override;
function HasResult: Boolean; override;
function DatabaseName: String; override;
function TableName: String; override;
end;
TAdoDBQuery = class(TDBQuery)
private
FCurrentResults: TAdoQuery;
FResultList: Array of TAdoQuery;
procedure SetRecNo(Value: Int64); override;
public
destructor Destroy; override;
procedure Execute(AddResult: Boolean=False; UseRawResult: Integer=-1); override;
function Col(Column: Integer; IgnoreErrors: Boolean=False): String; overload; override;
function ColIsPrimaryKeyPart(Column: Integer): Boolean; override;
function ColIsUniqueKeyPart(Column: Integer): Boolean; override;
function ColIsKeyPart(Column: Integer): Boolean; override;
function IsNull(Column: Integer): Boolean; overload; override;
function HasResult: Boolean; override;
function DatabaseName: String; override;
end;
TPGQuery = class(TDBQuery)
private
FConnection: TPgConnection;
FCurrentResults: PPGresult;
FRecNoLocal: Integer;
FResultList: TPGRawResults;
procedure SetRecNo(Value: Int64); override;
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
procedure Execute(AddResult: Boolean=False; UseRawResult: Integer=-1); override;
function Col(Column: Integer; IgnoreErrors: Boolean=False): String; overload; override;
function ColIsPrimaryKeyPart(Column: Integer): Boolean; override;
function ColIsUniqueKeyPart(Column: Integer): Boolean; override;
function ColIsKeyPart(Column: Integer): Boolean; override;
function IsNull(Column: Integer): Boolean; overload; override;
function HasResult: Boolean; override;
function DatabaseName: String; override;
function TableName: String; override;
end;
TSQLiteQuery = class(TDBQuery)
private
FConnection: TSQLiteConnection;
FCurrentResults: TSQLiteGridRows;
FRecNoLocal: Integer;
FResultList: TSQLiteRawResults;
procedure SetRecNo(Value: Int64); override;
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
procedure Execute(AddResult: Boolean=False; UseRawResult: Integer=-1); override;
function Col(Column: Integer; IgnoreErrors: Boolean=False): String; overload; override;
function ColIsPrimaryKeyPart(Column: Integer): Boolean; override;
function ColIsUniqueKeyPart(Column: Integer): Boolean; override;
function ColIsKeyPart(Column: Integer): Boolean; override;
function IsNull(Column: Integer): Boolean; overload; override;
function HasResult: Boolean; override;
function DatabaseName: String; override;
function TableName: String; override;
end;
function mysql_authentication_dialog_ask(
Handle: PMYSQL;
_type: Integer;
prompt: PAnsiChar;
buf: PAnsiChar;
buf_len: Integer
): PAnsiChar; cdecl;
exports
mysql_authentication_dialog_ask;
{$I const.inc}
implementation
uses apphelpers, loginform, change_password;
{ TProcessPipe }
constructor TProcessPipe.Create;
var
Success: Boolean;
begin
inherited;
Success := CreatePipe(ReadHandle, WriteHandle, nil, 8192);
if Success then
Success := DuplicateHandle(
GetCurrentProcess, ReadHandle,
GetCurrentProcess, @ReadHandle, 0, True,
DUPLICATE_CLOSE_SOURCE OR DUPLICATE_SAME_ACCESS
);
if Success then
Success := DuplicateHandle(
GetCurrentProcess, WriteHandle,
GetCurrentProcess, @WriteHandle, 0, True,
DUPLICATE_CLOSE_SOURCE OR DUPLICATE_SAME_ACCESS
);
if not Success then
raise EDbError.Create(_('Error creating I/O pipes'));
end;
destructor TProcessPipe.Destroy;
begin
CloseHandle(ReadHandle);
CloseHandle(WriteHandle);
inherited;
end;
{ TPlink }
constructor TPlink.Create(Connection: TDBConnection);
begin
inherited Create;
FConnection := Connection;
FInPipe := TProcessPipe.Create;
FOutPipe := TProcessPipe.Create;
FErrorPipe := TProcessPipe.Create;
end;
destructor TPlink.Destroy;
begin
FConnection.Log(lcInfo, f_('Closing plink.exe process #%d ...', [FProcessInfo.dwProcessId]));
TerminateProcess(FProcessInfo.hProcess, 0);
CloseHandle(FProcessInfo.hProcess);
CloseHandle(FProcessInfo.hThread);
FInPipe.Free;
FOutPipe.Free;
FErrorPipe.Free;
inherited;
end;
procedure TPlink.Connect;
var
PlinkCmd, PlinkCmdDisplay: String;
OutText, ErrorText, UserInput: String;
rx: TRegExpr;
StartupInfo: TStartupInfo;
ExitCode: LongWord;
Waited, ReturnedSomethingAt, PortChecks: Integer;
begin
// Check if local port is open
PortChecks := 0;
while not PortOpen(FConnection.Parameters.SSHLocalPort) do begin
Inc(PortChecks);
if PortChecks >= 20 then
raise EDbError.CreateFmt(_('Could not execute PLink: Port %d already in use.'), [FConnection.Parameters.SSHLocalPort]);
FConnection.Log(lcInfo, f_('Port #%d in use. Checking if #%d is available...', [FConnection.Parameters.SSHLocalPort, FConnection.Parameters.SSHLocalPort+1]));
FConnection.Parameters.SSHLocalPort := FConnection.Parameters.SSHLocalPort + 1;
end;
// Build plink.exe command line
// plink bob@domain.com -pw myPassw0rd1 -P 22 -i "keyfile.pem" -L 55555:localhost:3306
PlinkCmd := FConnection.Parameters.SSHPlinkExe + ' -ssh ';
if FConnection.Parameters.SSHUser.Trim <> '' then
PlinkCmd := PlinkCmd + FConnection.Parameters.SSHUser.Trim + '@';
if FConnection.Parameters.SSHHost.Trim <> '' then
PlinkCmd := PlinkCmd + FConnection.Parameters.SSHHost.Trim
else
PlinkCmd := PlinkCmd + FConnection.Parameters.Hostname;
if FConnection.Parameters.SSHPassword <> '' then begin
// Escape double quote with backslash, see issue #261
PlinkCmd := PlinkCmd + ' -pw "' + StringReplace(FConnection.Parameters.SSHPassword, '"', '\"', [rfReplaceAll]) + '"';
end;
if FConnection.Parameters.SSHPort > 0 then
PlinkCmd := PlinkCmd + ' -P ' + IntToStr(FConnection.Parameters.SSHPort);
if FConnection.Parameters.SSHPrivateKey <> '' then
PlinkCmd := PlinkCmd + ' -i "' + FConnection.Parameters.SSHPrivateKey + '"';
PlinkCmd := PlinkCmd + ' -N -L ' + IntToStr(FConnection.Parameters.SSHLocalPort) + ':' + FConnection.Parameters.Hostname + ':' + IntToStr(FConnection.Parameters.Port);
rx := TRegExpr.Create;
rx.Expression := '(-pw\s+")[^"]*(")';
PlinkCmdDisplay := rx.Replace(PlinkCmd, '${1}******${2}', True);
FConnection.Log(lcInfo, f_('Attempt to create plink.exe process, waiting %ds for response ...', [FConnection.Parameters.SSHTimeout]));
FConnection.Log(lcInfo, PlinkCmdDisplay);
// Prepare process
FillChar(StartupInfo, SizeOf(StartupInfo), 0);
StartupInfo.cb := SizeOf(StartupInfo);
StartupInfo.dwFlags := STARTF_USESHOWWINDOW or STARTF_USESTDHANDLES;
StartupInfo.wShowWindow := SW_HIDE;
StartupInfo.hStdInput:= FInPipe.ReadHandle;
StartupInfo.hStdError:= FErrorPipe.WriteHandle;
StartupInfo.hStdOutput:= FOutPipe.WriteHandle;
// Create plink.exe process
FillChar(FProcessInfo, SizeOf(FProcessInfo), 0);
if not CreateProcess(
nil,
PChar(PlinkCmd),
nil,
nil,
true,
CREATE_DEFAULT_ERROR_MODE or CREATE_NEW_CONSOLE or NORMAL_PRIORITY_CLASS,
nil,
PChar(GetCurrentDir),
StartupInfo,
FProcessInfo) then begin
ErrorText := CRLF + CRLF + PlinkCmdDisplay + CRLF + CRLF + 'System message: ' + SysErrorMessage(GetLastError);
ErrorText := f_('Could not execute PLink: %s', [ErrorText]);
raise EDbError.Create(ErrorText);
end;
// Wait until timeout has finished, or some text returned.
// Parse pipe output and probably show some message in a dialog.
Waited := 0;
ReturnedSomethingAt := -1;
while Waited < FConnection.Parameters.SSHTimeout*1000 do begin
Inc(Waited, 200);
WaitForSingleObject(FProcessInfo.hProcess, 200);
GetExitCodeProcess(FProcessInfo.hProcess, ExitCode);
if ExitCode <> STILL_ACTIVE then
raise EDbError.CreateFmt(_('PLink exited unexpected. Command line was: %s'), [CRLF+PlinkCmdDisplay]);
OutText := Trim(ReadPipe(FOutPipe));
ErrorText := ReadPipe(FErrorPipe);
if (OutText <> '') or (ErrorText <> '') then begin
ReturnedSomethingAt := Waited;
FConnection.Log(lcDebug, Format('PLink output after %d ms. OutPipe: "%s" ErrorPipe: "%s"', [Waited, OutText, ErrorText]));
end;
if OutText <> '' then begin
if ExecRegExpr('(login as|Passphrase for key "[^"]+")\s*\:', OutText) then begin
// Prompt for username
UserInput := InputBox('PLink:', OutText, '');
SendText(UserInput + CRLF);
end else if ExecRegExpr('password\s*\:', OutText) then begin
// Prompt for password. Send * as first char of prompt param so InputBox hides input characters
UserInput := InputBox('PLink:', #31+OutText, '');
SendText(UserInput + CRLF);
end else begin
// Informational message box
rx.Expression := '^[^\.]+\.';
if rx.Exec(OutText) then begin // First words end with a dot - use it as caption
MessageDialog('PLink: '+rx.Match[0], OutText, mtInformation, [mbOK])
end else begin
MessageDialog('PLink:', OutText, mtInformation, [mbOK]);
end;
end;
end;
if ErrorText <> '' then begin
rx.Expression := '([^\.]+\?)(\s*\(y\/n\s*(,[^\)]+)?\)\s*)$';
if rx.Exec(ErrorText) then begin
// Prompt user with question
case MessageDialog(Trim(rx.Match[1]), Copy(ErrorText, 1, Length(ErrorText)-rx.MatchLen[2]), mtConfirmation, [mbYes, mbNo, mbCancel]) of
mrYes:
SendText('y');
mrNo:
SendText('n');
mrCancel: begin
Destroy;
raise EDbError.Create(_('PLink cancelled'));
end;
end;
end else if ErrorText.StartsWith('Using username ', True)
or ErrorText.StartsWith('Pre-authentication banner ', True)
then begin
// See #577 - new plink version sends this informational text to error pipe
FConnection.Log(lcError, 'PLink: '+ErrorText);
SendText(CRLF);
end else begin
// Any other error message goes here.
if ErrorText.Contains('Access denied') then begin
// This is a final connection error - end loop in this case
Destroy;
raise EDbError.Create(ErrorText);
end else begin
// Just show error text and proceed looping
MessageDialog('PLink:', ErrorText, mtError, [mbOK]);
end;
end;
end;
// Exit loop after 2s idletime when there was output earlier