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feat: plugin system — extract drivers into bundles with Settings UI
Extract all 8 database drivers into .tableplugin bundles loaded at runtime. Add Settings > Plugins tab for managing installed plugins.
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‎Plugins/ClickHouseDriverPlugin/ClickHousePlugin.swift‎

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‎Plugins/ClickHouseDriverPlugin/Info.plist‎

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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
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<plist version="1.0">
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<dict>
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<key>TableProPluginKitVersion</key>
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<integer>1</integer>
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</dict>
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</plist>

‎Plugins/MSSQLDriverPlugin/CFreeTDS/CFreeTDS.h‎

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//
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// CFreeTDS.h
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// TablePro
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//
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// Umbrella header for FreeTDS db-lib C bridge.
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// Run scripts/build-freetds.sh to populate include/ with real FreeTDS headers.
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//
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#include "include/sybfront.h"
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#include "include/sybdb.h"

‎Plugins/MSSQLDriverPlugin/CFreeTDS/include/sybdb.h‎

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//
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// sybdb.h - FreeTDS db-lib stub header
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// Swift-compatible bridge: real libsybdb.a provides the implementation.
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//
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#ifndef _SYBDB_H_
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#define _SYBDB_H_
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#include "sybfront.h"
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// Opaque connection and login types.
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// Placeholder bodies allow Swift to use UnsafeMutablePointer<DBPROCESS>.
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// The real FreeTDS structs are internal; we never access fields from Swift.
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struct dbprocess { char _placeholder; };
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typedef struct dbprocess DBPROCESS;
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struct loginrec { char _placeholder; };
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typedef struct loginrec LOGINREC;
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// Column type constants (TDS wire types)
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#define SYBCHAR 47
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#define SYBVARCHAR 39
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#define SYBNCHAR 175
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#define SYBNVARCHAR 103
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#define SYBTEXT 35
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#define SYBNTEXT 99
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#define SYBINT1 48
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#define SYBINT2 52
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#define SYBINT4 56
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#define SYBINT8 127
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#define SYBINTN 38
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#define SYBFLT8 62
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#define SYBREAL 59
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#define SYBFLTN 109
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#define SYBDECIMAL 106
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#define SYBNUMERIC 108
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#define SYBMONEY 60
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#define SYBMONEY4 122
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#define SYBMONEYN 110
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#define SYBBIT 50
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#define SYBBINARY 45
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#define SYBVARBINARY 37
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#define SYBIMAGE 34
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#define SYBDATETIME 61
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#define SYBDATETIME4 58
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#define SYBDATETIMN 111
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#define SYBUNIQUE 36
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// Login property constants for dbsetlname() — values verified against FreeTDS 1.4 sybdb.h
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#define DBSETHOST 1
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#define DBSETUSER 2
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#define DBSETPWD 3
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#define DBSETAPP 5 // 4 is unused; real FreeTDS DBSETAPP = 5
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// Convenience macros (match FreeTDS sybdb.h)
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#define DBSETLHOST(x, y) dbsetlname((x), (y), DBSETHOST)
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#define DBSETLUSER(x, y) dbsetlname((x), (y), DBSETUSER)
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#define DBSETLPWD(x, y) dbsetlname((x), (y), DBSETPWD)
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#define DBSETLAPP(x, y) dbsetlname((x), (y), DBSETAPP)
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// TDS version constants — verified against FreeTDS 1.4 sybdb.h
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#define DBVERSION_74 8 // TDS 7.4 (SQL Server 2012+)
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// Encryption
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#define ENCRYPT_OFF 0
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// Error handler return codes
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#define INT_CANCEL 2
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#define INT_CONTINUE 1
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#define INT_EXIT 4
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// Error handler function types
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typedef int (*EHANDLEFUNC)(DBPROCESS *dbproc, int severity, int dberr, int oserr,
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const char *dberrstr, const char *oserrstr);
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typedef int (*MHANDLEFUNC)(DBPROCESS *dbproc, DBINT msgno, int msgstate, int severity,
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char *msgtext, char *srvname, char *proc, int line);
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// Core db-lib API
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extern RETCODE dbinit(void);
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extern void dbexit(void);
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extern LOGINREC *dblogin(void);
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extern void dbloginfree(LOGINREC *loginrec);
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extern RETCODE dbsetlname(LOGINREC *loginrec, const char *value, int which);
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extern RETCODE dbsetlversion(LOGINREC *loginrec, BYTE version);
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// tdsdbopen is the real symbol; dbopen is a macro wrapper in the real header
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// (msdblib=1 enables MS SQL Server behavior — required for SQL Server connections)
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// Swift cannot expand C macros, so we expose a static inline function instead.
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extern DBPROCESS *tdsdbopen(LOGINREC *loginrec, const char *servername, int msdblib);
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static inline DBPROCESS *dbopen(LOGINREC *loginrec, const char *servername) {
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return tdsdbopen(loginrec, servername, 1);
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}
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extern RETCODE dbclose(DBPROCESS *dbproc);
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extern RETCODE dbuse(DBPROCESS *dbproc, const char *name);
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extern RETCODE dbcmd(DBPROCESS *dbproc, const char *cmdstring);
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extern RETCODE dbsqlexec(DBPROCESS *dbproc);
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extern RETCODE dbresults(DBPROCESS *dbproc);
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extern RETCODE dbnextrow(DBPROCESS *dbproc);
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extern int dbnumcols(DBPROCESS *dbproc);
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extern char *dbcolname(DBPROCESS *dbproc, int colnum);
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extern int dbcoltype(DBPROCESS *dbproc, int colnum);
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extern BYTE *dbdata(DBPROCESS *dbproc, int colnum);
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extern DBINT dbdatlen(DBPROCESS *dbproc, int colnum);
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extern RETCODE dbcancel(DBPROCESS *dbproc);
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extern RETCODE dbcanquery(DBPROCESS *dbproc);
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// Type conversion — converts a column value to a different TDS type (e.g. to SYBCHAR for display)
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extern DBINT dbconvert(DBPROCESS *dbproc, int srctype, const BYTE *src, DBINT srclen,
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int desttype, BYTE *dest, DBINT destlen);
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extern EHANDLEFUNC dberrhandle(EHANDLEFUNC handler);
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extern MHANDLEFUNC dbmsghandle(MHANDLEFUNC handler);
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extern char *dbversion(void);
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#endif /* _SYBDB_H_ */

‎Plugins/MSSQLDriverPlugin/CFreeTDS/include/sybfront.h‎

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//
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// sybfront.h - FreeTDS sybfront stub header
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// Minimal types needed by sybdb.h
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//
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#ifndef _SYBFRONT_H_
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#define _SYBFRONT_H_
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#include <stdint.h>
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typedef unsigned char BYTE;
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typedef int32_t DBINT;
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typedef unsigned char DBBOOL;
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#define SUCCEED 1
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#define FAIL 0
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#define NO_MORE_RESULTS 2
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#define NO_MORE_ROWS -2
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typedef int RETCODE;
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#endif /* _SYBFRONT_H_ */

‎Plugins/MSSQLDriverPlugin/CFreeTDS/module.modulemap‎

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module CFreeTDS {
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umbrella header "CFreeTDS.h"
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export *
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}

‎Plugins/MSSQLDriverPlugin/Info.plist‎

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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
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<plist version="1.0">
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<dict>
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<key>TableProPluginKitVersion</key>
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<integer>1</integer>
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</dict>
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</plist>

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