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Comment:Add the "PRAGMA legacy_alter_table=ON" command to enable the pre-3.25.0 behavior of ALTER TABLE that does not modify the bodies of triggers or views or the WHERE clause of a partial index. Enable the legacy behavior by default when running the xRename method of virtual tables.
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Files: files | file ages | folders
SHA3-256: 7edd26ed27ed1e7eab603058f7d55f2eac45e7bd1908bfa5f32293611883b157
User & Date: drh 2018-09-20 20:15:02
Context
2018-09-24
20:48
Add the "PRAGMA legacy_alter_table=ON" command to enable the pre-3.25.0 behavior of ALTER TABLE that does not modify the bodies of triggers or views or the WHERE clause of a partial index. Enable the legacy behavior by default when running the xRename method of virtual tables. check-in: 31dc8b19 user: drh tags: branch-3.25
2018-09-20
20:43
Minor code simplification. check-in: 22ae8a52 user: drh tags: trunk
20:15
Add the "PRAGMA legacy_alter_table=ON" command to enable the pre-3.25.0 behavior of ALTER TABLE that does not modify the bodies of triggers or views or the WHERE clause of a partial index. Enable the legacy behavior by default when running the xRename method of virtual tables. check-in: 7edd26ed user: drh tags: trunk
19:02
Combine the Expr.pTab and Expr.pWin fields into a union named "y". Add a new EP_WinFunc property that is only true if Expr.y.pWin is a valid pointer. This reduces the size of the Expr object by 8 bytes, reduces the overall amount of code, and shaves over 1 million cycles off of the speed test. check-in: ad130bb8 user: drh tags: trunk
17:21
By default, make all "ALTER TABLE RENAME" statements executed within a virtual table xRename() method exhibit the legacy behaviour. Closed-Leaf check-in: 71947337 user: dan tags: legacy-alter-table
Changes
Hide Diffs Unified Diffs Ignore Whitespace Patch

Changes to src/alter.c.

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  ** table.
  */
  v = sqlite3GetVdbe(pParse);
  if( v==0 ){
    goto exit_rename_table;
  }

  /* If this is a virtual table, invoke the xRename() function if
  ** one is defined. The xRename() callback will modify the names
  ** of any resources used by the v-table implementation (including other
  ** SQLite tables) that are identified by the name of the virtual table.
  */
#ifndef SQLITE_OMIT_VIRTUALTABLE
  if( pVTab ){
    int i = ++pParse->nMem;
    sqlite3VdbeLoadString(v, i, zName);
    sqlite3VdbeAddOp4(v, OP_VRename, i, 0, 0,(const char*)pVTab, P4_VTAB);
    sqlite3MayAbort(pParse);
  }
#endif

  /* figure out how many UTF-8 characters are in zName */
  zTabName = pTab->zName;
  nTabName = sqlite3Utf8CharLen(zTabName, -1);

  /* Rewrite all CREATE TABLE, INDEX, TRIGGER or VIEW statements in
  ** the schema to use the new table name.  */
  sqlite3NestedParse(pParse, 
................................................................................
            "tbl_name = "
              "CASE WHEN tbl_name=%Q COLLATE nocase AND "
              "          sqlite_rename_test(%Q, sql, type, name, 1) "
              "THEN %Q ELSE tbl_name END "
            "WHERE type IN ('view', 'trigger')"
        , zDb, zTabName, zName, zTabName, zDb, zName);
  }















  renameReloadSchema(pParse, iDb);
  renameTestSchema(pParse, zDb, iDb==1);

exit_rename_table:
  sqlite3SrcListDelete(db, pSrc);
  sqlite3DbFree(db, zName);
................................................................................
    sWalker.xExprCallback = renameTableExprCb;
    sWalker.xSelectCallback = renameTableSelectCb;
    sWalker.u.pRename = &sCtx;

    rc = renameParseSql(&sParse, zDb, 1, db, zInput, bTemp);

    if( rc==SQLITE_OK ){

      if( sParse.pNewTable ){
        Table *pTab = sParse.pNewTable;

        if( pTab->pSelect ){

          NameContext sNC;
          memset(&sNC, 0, sizeof(sNC));
          sNC.pParse = &sParse;

          sqlite3SelectPrep(&sParse, pTab->pSelect, &sNC);
          if( sParse.nErr ) rc = sParse.rc;
          sqlite3WalkSelect(&sWalker, pTab->pSelect);

        }else{
          /* Modify any FK definitions to point to the new table. */
#ifndef SQLITE_OMIT_FOREIGN_KEY
          if( db->flags & SQLITE_ForeignKeys ){
            FKey *pFKey;
            for(pFKey=pTab->pFKey; pFKey; pFKey=pFKey->pNextFrom){
              if( sqlite3_stricmp(pFKey->zTo, zOld)==0 ){
................................................................................
#endif

          /* If this is the table being altered, fix any table refs in CHECK
          ** expressions. Also update the name that appears right after the
          ** "CREATE [VIRTUAL] TABLE" bit. */
          if( sqlite3_stricmp(zOld, pTab->zName)==0 ){
            sCtx.pTab = pTab;

            sqlite3WalkExprList(&sWalker, pTab->pCheck);

            renameTokenFind(&sParse, &sCtx, pTab->zName);
          }
        }
      }

      else if( sParse.pNewIndex ){
        renameTokenFind(&sParse, &sCtx, sParse.pNewIndex->zName);

        sqlite3WalkExpr(&sWalker, sParse.pNewIndex->pPartIdxWhere);

      }

#ifndef SQLITE_OMIT_TRIGGER
      else{
        Trigger *pTrigger = sParse.pNewTrigger;
        TriggerStep *pStep;
        if( 0==sqlite3_stricmp(sParse.pNewTrigger->table, zOld) 
            && sCtx.pTab->pSchema==pTrigger->pTabSchema
          ){
          renameTokenFind(&sParse, &sCtx, sParse.pNewTrigger->table);
        }


        rc = renameResolveTrigger(&sParse, bTemp ? 0 : zDb);
        if( rc==SQLITE_OK ){
          renameWalkTrigger(&sWalker, pTrigger);
          for(pStep=pTrigger->step_list; pStep; pStep=pStep->pNext){
            if( pStep->zTarget && 0==sqlite3_stricmp(pStep->zTarget, zOld) ){
              renameTokenFind(&sParse, &sCtx, pStep->zTarget);

            }
          }
        }
      }
#endif
    }

................................................................................
  int NotUsed,
  sqlite3_value **argv
){
  sqlite3 *db = sqlite3_context_db_handle(context);
  char const *zDb = (const char*)sqlite3_value_text(argv[0]);
  char const *zInput = (const char*)sqlite3_value_text(argv[1]);
  int bTemp = sqlite3_value_int(argv[4]);


#ifndef SQLITE_OMIT_AUTHORIZATION
  sqlite3_xauth xAuth = db->xAuth;
  db->xAuth = 0;
#endif

  UNUSED_PARAMETER(NotUsed);
  if( zDb && zInput ){
    int rc;
    Parse sParse;
    rc = renameParseSql(&sParse, zDb, 1, db, zInput, bTemp);
    if( rc==SQLITE_OK ){
      if( sParse.pNewTable && sParse.pNewTable->pSelect ){
        NameContext sNC;
        memset(&sNC, 0, sizeof(sNC));
        sNC.pParse = &sParse;
        sqlite3SelectPrep(&sParse, sParse.pNewTable->pSelect, &sNC);
        if( sParse.nErr ) rc = sParse.rc;
      }

      else if( sParse.pNewTrigger ){

        rc = renameResolveTrigger(&sParse, bTemp ? 0 : zDb);

        if( rc==SQLITE_OK ){
          int i1 = sqlite3SchemaToIndex(db, sParse.pNewTrigger->pTabSchema);
          int i2 = sqlite3FindDbName(db, zDb);
          if( i1==i2 ) sqlite3_result_int(context, 1);
        }
      }
    }







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  ** table.
  */
  v = sqlite3GetVdbe(pParse);
  if( v==0 ){
    goto exit_rename_table;
  }















  /* figure out how many UTF-8 characters are in zName */
  zTabName = pTab->zName;
  nTabName = sqlite3Utf8CharLen(zTabName, -1);

  /* Rewrite all CREATE TABLE, INDEX, TRIGGER or VIEW statements in
  ** the schema to use the new table name.  */
  sqlite3NestedParse(pParse, 
................................................................................
            "tbl_name = "
              "CASE WHEN tbl_name=%Q COLLATE nocase AND "
              "          sqlite_rename_test(%Q, sql, type, name, 1) "
              "THEN %Q ELSE tbl_name END "
            "WHERE type IN ('view', 'trigger')"
        , zDb, zTabName, zName, zTabName, zDb, zName);
  }

  /* If this is a virtual table, invoke the xRename() function if
  ** one is defined. The xRename() callback will modify the names
  ** of any resources used by the v-table implementation (including other
  ** SQLite tables) that are identified by the name of the virtual table.
  */
#ifndef SQLITE_OMIT_VIRTUALTABLE
  if( pVTab ){
    int i = ++pParse->nMem;
    sqlite3VdbeLoadString(v, i, zName);
    sqlite3VdbeAddOp4(v, OP_VRename, i, 0, 0,(const char*)pVTab, P4_VTAB);
    sqlite3MayAbort(pParse);
  }
#endif

  renameReloadSchema(pParse, iDb);
  renameTestSchema(pParse, zDb, iDb==1);

exit_rename_table:
  sqlite3SrcListDelete(db, pSrc);
  sqlite3DbFree(db, zName);
................................................................................
    sWalker.xExprCallback = renameTableExprCb;
    sWalker.xSelectCallback = renameTableSelectCb;
    sWalker.u.pRename = &sCtx;

    rc = renameParseSql(&sParse, zDb, 1, db, zInput, bTemp);

    if( rc==SQLITE_OK ){
      int isLegacy = (db->flags & SQLITE_LegacyAlter);
      if( sParse.pNewTable ){
        Table *pTab = sParse.pNewTable;

        if( pTab->pSelect ){
          if( isLegacy==0 ){
            NameContext sNC;
            memset(&sNC, 0, sizeof(sNC));
            sNC.pParse = &sParse;

            sqlite3SelectPrep(&sParse, pTab->pSelect, &sNC);
            if( sParse.nErr ) rc = sParse.rc;
            sqlite3WalkSelect(&sWalker, pTab->pSelect);
          }
        }else{
          /* Modify any FK definitions to point to the new table. */
#ifndef SQLITE_OMIT_FOREIGN_KEY
          if( db->flags & SQLITE_ForeignKeys ){
            FKey *pFKey;
            for(pFKey=pTab->pFKey; pFKey; pFKey=pFKey->pNextFrom){
              if( sqlite3_stricmp(pFKey->zTo, zOld)==0 ){
................................................................................
#endif

          /* If this is the table being altered, fix any table refs in CHECK
          ** expressions. Also update the name that appears right after the
          ** "CREATE [VIRTUAL] TABLE" bit. */
          if( sqlite3_stricmp(zOld, pTab->zName)==0 ){
            sCtx.pTab = pTab;
            if( isLegacy==0 ){
              sqlite3WalkExprList(&sWalker, pTab->pCheck);
            }
            renameTokenFind(&sParse, &sCtx, pTab->zName);
          }
        }
      }

      else if( sParse.pNewIndex ){
        renameTokenFind(&sParse, &sCtx, sParse.pNewIndex->zName);
        if( isLegacy==0 ){
          sqlite3WalkExpr(&sWalker, sParse.pNewIndex->pPartIdxWhere);
        }
      }

#ifndef SQLITE_OMIT_TRIGGER
      else{
        Trigger *pTrigger = sParse.pNewTrigger;
        TriggerStep *pStep;
        if( 0==sqlite3_stricmp(sParse.pNewTrigger->table, zOld) 
            && sCtx.pTab->pSchema==pTrigger->pTabSchema
          ){
          renameTokenFind(&sParse, &sCtx, sParse.pNewTrigger->table);
        }

        if( isLegacy==0 ){
          rc = renameResolveTrigger(&sParse, bTemp ? 0 : zDb);
          if( rc==SQLITE_OK ){
            renameWalkTrigger(&sWalker, pTrigger);
            for(pStep=pTrigger->step_list; pStep; pStep=pStep->pNext){
              if( pStep->zTarget && 0==sqlite3_stricmp(pStep->zTarget, zOld) ){
                renameTokenFind(&sParse, &sCtx, pStep->zTarget);
              }
            }
          }
        }
      }
#endif
    }

................................................................................
  int NotUsed,
  sqlite3_value **argv
){
  sqlite3 *db = sqlite3_context_db_handle(context);
  char const *zDb = (const char*)sqlite3_value_text(argv[0]);
  char const *zInput = (const char*)sqlite3_value_text(argv[1]);
  int bTemp = sqlite3_value_int(argv[4]);
  int isLegacy = (db->flags & SQLITE_LegacyAlter);

#ifndef SQLITE_OMIT_AUTHORIZATION
  sqlite3_xauth xAuth = db->xAuth;
  db->xAuth = 0;
#endif

  UNUSED_PARAMETER(NotUsed);
  if( zDb && zInput ){
    int rc;
    Parse sParse;
    rc = renameParseSql(&sParse, zDb, 1, db, zInput, bTemp);
    if( rc==SQLITE_OK ){
      if( isLegacy==0 && sParse.pNewTable && sParse.pNewTable->pSelect ){
        NameContext sNC;
        memset(&sNC, 0, sizeof(sNC));
        sNC.pParse = &sParse;
        sqlite3SelectPrep(&sParse, sParse.pNewTable->pSelect, &sNC);
        if( sParse.nErr ) rc = sParse.rc;
      }

      else if( sParse.pNewTrigger ){
        if( isLegacy==0 ){
          rc = renameResolveTrigger(&sParse, bTemp ? 0 : zDb);
        }
        if( rc==SQLITE_OK ){
          int i1 = sqlite3SchemaToIndex(db, sParse.pNewTrigger->pTabSchema);
          int i2 = sqlite3FindDbName(db, zDb);
          if( i1==i2 ) sqlite3_result_int(context, 1);
        }
      }
    }

Changes to src/pragma.h.

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 {/* zName:     */ "key",
  /* ePragTyp:  */ PragTyp_KEY,
  /* ePragFlg:  */ 0,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)





 {/* zName:     */ "legacy_file_format",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_LegacyFileFmt },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS) && SQLITE_ENABLE_LOCKING_STYLE
................................................................................
 {/* zName:     */ "writable_schema",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_WriteSchema },
#endif
};
/* Number of pragmas: 60 on by default, 77 total. */







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 {/* zName:     */ "key",
  /* ePragTyp:  */ PragTyp_KEY,
  /* ePragFlg:  */ 0,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
 {/* zName:     */ "legacy_alter_table",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_LegacyAlter },
 {/* zName:     */ "legacy_file_format",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_LegacyFileFmt },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS) && SQLITE_ENABLE_LOCKING_STYLE
................................................................................
 {/* zName:     */ "writable_schema",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_WriteSchema },
#endif
};
/* Number of pragmas: 61 on by default, 78 total. */

Changes to src/sqliteInt.h.

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#define SQLITE_DeferFKs       0x00080000  /* Defer all FK constraints */
#define SQLITE_QueryOnly      0x00100000  /* Disable database changes */
#define SQLITE_CellSizeCk     0x00200000  /* Check btree cell sizes on load */
#define SQLITE_Fts3Tokenizer  0x00400000  /* Enable fts3_tokenizer(2) */
#define SQLITE_EnableQPSG     0x00800000  /* Query Planner Stability Guarantee*/
#define SQLITE_TriggerEQP     0x01000000  /* Show trigger EXPLAIN QUERY PLAN */
#define SQLITE_ResetDatabase  0x02000000  /* Reset the database */


/* Flags used only if debugging */
#ifdef SQLITE_DEBUG
#define SQLITE_SqlTrace       0x08000000  /* Debug print SQL as it executes */
#define SQLITE_VdbeListing    0x10000000  /* Debug listings of VDBE programs */
#define SQLITE_VdbeTrace      0x20000000  /* True to trace VDBE execution */
#define SQLITE_VdbeAddopTrace 0x40000000  /* Trace sqlite3VdbeAddOp() calls */







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#define SQLITE_DeferFKs       0x00080000  /* Defer all FK constraints */
#define SQLITE_QueryOnly      0x00100000  /* Disable database changes */
#define SQLITE_CellSizeCk     0x00200000  /* Check btree cell sizes on load */
#define SQLITE_Fts3Tokenizer  0x00400000  /* Enable fts3_tokenizer(2) */
#define SQLITE_EnableQPSG     0x00800000  /* Query Planner Stability Guarantee*/
#define SQLITE_TriggerEQP     0x01000000  /* Show trigger EXPLAIN QUERY PLAN */
#define SQLITE_ResetDatabase  0x02000000  /* Reset the database */
#define SQLITE_LegacyAlter    0x04000000  /* Legacy ALTER TABLE behaviour */

/* Flags used only if debugging */
#ifdef SQLITE_DEBUG
#define SQLITE_SqlTrace       0x08000000  /* Debug print SQL as it executes */
#define SQLITE_VdbeListing    0x10000000  /* Debug listings of VDBE programs */
#define SQLITE_VdbeTrace      0x20000000  /* True to trace VDBE execution */
#define SQLITE_VdbeAddopTrace 0x40000000  /* Trace sqlite3VdbeAddOp() calls */

Changes to src/vdbe.c.

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** P4 is a pointer to a virtual table object, an sqlite3_vtab structure.
** This opcode invokes the corresponding xRename method. The value
** in register P1 is passed as the zName argument to the xRename method.
*/
case OP_VRename: {
  sqlite3_vtab *pVtab;
  Mem *pName;




  pVtab = pOp->p4.pVtab->pVtab;
  pName = &aMem[pOp->p1];
  assert( pVtab->pModule->xRename );
  assert( memIsValid(pName) );
  assert( p->readOnly==0 );
  REGISTER_TRACE(pOp->p1, pName);
  assert( pName->flags & MEM_Str );
  testcase( pName->enc==SQLITE_UTF8 );
  testcase( pName->enc==SQLITE_UTF16BE );
  testcase( pName->enc==SQLITE_UTF16LE );
  rc = sqlite3VdbeChangeEncoding(pName, SQLITE_UTF8);
  if( rc ) goto abort_due_to_error;
  rc = pVtab->pModule->xRename(pVtab, pName->z);

  sqlite3VtabImportErrmsg(p, pVtab);
  p->expired = 0;
  if( rc ) goto abort_due_to_error;
  break;
}
#endif








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** P4 is a pointer to a virtual table object, an sqlite3_vtab structure.
** This opcode invokes the corresponding xRename method. The value
** in register P1 is passed as the zName argument to the xRename method.
*/
case OP_VRename: {
  sqlite3_vtab *pVtab;
  Mem *pName;
  int isLegacy;
  
  isLegacy = (db->flags & SQLITE_LegacyAlter);
  db->flags |= SQLITE_LegacyAlter;
  pVtab = pOp->p4.pVtab->pVtab;
  pName = &aMem[pOp->p1];
  assert( pVtab->pModule->xRename );
  assert( memIsValid(pName) );
  assert( p->readOnly==0 );
  REGISTER_TRACE(pOp->p1, pName);
  assert( pName->flags & MEM_Str );
  testcase( pName->enc==SQLITE_UTF8 );
  testcase( pName->enc==SQLITE_UTF16BE );
  testcase( pName->enc==SQLITE_UTF16LE );
  rc = sqlite3VdbeChangeEncoding(pName, SQLITE_UTF8);
  if( rc ) goto abort_due_to_error;
  rc = pVtab->pModule->xRename(pVtab, pName->z);
  if( isLegacy==0 ) db->flags &= ~SQLITE_LegacyAlter;
  sqlite3VtabImportErrmsg(p, pVtab);
  p->expired = 0;
  if( rc ) goto abort_due_to_error;
  break;
}
#endif

Added test/alterlegacy.test.













































































































































































































































































































































































































































































































































































































































































































































































































































































































































































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# 2018 September 20
#
# 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.
#
#*************************************************************************
#

set testdir [file dirname $argv0]
source $testdir/tester.tcl
set testprefix alterlegacy

# If SQLITE_OMIT_ALTERTABLE is defined, omit this file.
ifcapable !altertable {
  finish_test
  return
}

do_execsql_test 1.0 {
  PRAGMA legacy_alter_table = 1;
  CREATE TABLE t1(a, b, CHECK(t1.a != t1.b));
  CREATE TABLE t2(a, b);
  CREATE INDEX t2expr ON t2(a) WHERE t2.b>0;
}

do_execsql_test 1.1 {
  SELECT sql FROM sqlite_master
} {
  {CREATE TABLE t1(a, b, CHECK(t1.a != t1.b))}
  {CREATE TABLE t2(a, b)}
  {CREATE INDEX t2expr ON t2(a) WHERE t2.b>0}
}

# Legacy behavior is to corrupt the schema in this case, as the table name in
# the CHECK constraint is incorrect after "t1" is renamed. This version is
# slightly different - it rejects the change and rolls back the transaction.
do_catchsql_test 1.2 {
  ALTER TABLE t1 RENAME TO t1new;
} {1 {no such column: t1.a}}

do_execsql_test 1.3 {
  CREATE TABLE t3(c, d);
  ALTER TABLE t3 RENAME TO t3new;
  DROP TABLE t3new;
}

do_execsql_test 1.4 {
  SELECT sql FROM sqlite_master
} {
  {CREATE TABLE t1(a, b, CHECK(t1.a != t1.b))}
  {CREATE TABLE t2(a, b)}
  {CREATE INDEX t2expr ON t2(a) WHERE t2.b>0}
}


do_catchsql_test 1.3 {
  ALTER TABLE t2 RENAME TO t2new;
} {1 {no such column: t2.b}}
do_execsql_test 1.4 {
  SELECT sql FROM sqlite_master
} {
  {CREATE TABLE t1(a, b, CHECK(t1.a != t1.b))}
  {CREATE TABLE t2(a, b)}
  {CREATE INDEX t2expr ON t2(a) WHERE t2.b>0}
}


#-------------------------------------------------------------------------
reset_db
ifcapable vtab {
  register_echo_module db

  do_execsql_test 2.0 {
    PRAGMA legacy_alter_table = 1;
    CREATE TABLE abc(a, b, c);
    INSERT INTO abc VALUES(1, 2, 3);
    CREATE VIRTUAL TABLE eee USING echo('abc');
    SELECT * FROM eee;
  } {1 2 3}

  do_execsql_test 2.1 {
    ALTER TABLE eee RENAME TO fff;
    SELECT * FROM fff;
  } {1 2 3}

  db close
  sqlite3 db test.db

  do_catchsql_test 2.2 {
    ALTER TABLE fff RENAME TO ggg;
  } {1 {no such module: echo}}
}

#-------------------------------------------------------------------------
reset_db

do_execsql_test 3.0 {
  PRAGMA legacy_alter_table = 1;
  CREATE TABLE txx(a, b, c);
  INSERT INTO txx VALUES(1, 2, 3);
  CREATE VIEW vvv AS SELECT main.txx.a, txx.b, c FROM txx;
  CREATE VIEW uuu AS SELECT main.one.a, one.b, c FROM txx AS one;
  CREATE VIEW temp.ttt AS SELECT main.txx.a, txx.b, one.b, main.one.a FROM txx AS one, txx;
}

do_execsql_test 3.1.1 {
  SELECT * FROM vvv;
} {1 2 3}
do_execsql_test 3.1.2a {
  ALTER TABLE txx RENAME TO "t xx";
}
do_catchsql_test 3.1.2b {
  SELECT * FROM vvv;
} {1 {no such table: main.txx}}
do_execsql_test 3.1.3 {
  SELECT sql FROM sqlite_master WHERE name='vvv';
} {{CREATE VIEW vvv AS SELECT main.txx.a, txx.b, c FROM txx}}


do_catchsql_test 3.2.1 {
  SELECT * FROM uuu;
} {1 {no such table: main.txx}}
do_execsql_test 3.2.2 {
  SELECT sql FROM sqlite_master WHERE name='uuu';;
} {{CREATE VIEW uuu AS SELECT main.one.a, one.b, c FROM txx AS one}}

do_catchsql_test 3.3.1 {
  SELECT * FROM ttt;
} {1 {no such table: txx}}
do_execsql_test 3.3.2 {
  SELECT sql FROM sqlite_temp_master WHERE name='ttt';
} {{CREATE VIEW ttt AS SELECT main.txx.a, txx.b, one.b, main.one.a FROM txx AS one, txx}}

#-------------------------------------------------------------------------
reset_db
do_execsql_test 4.0 {
  PRAGMA legacy_alter_table = 1;
  CREATE table t1(x, y);
  CREATE table t2(a, b);

  CREATE TRIGGER tr1 AFTER INSERT ON t1 BEGIN
    SELECT t1.x, * FROM t1, t2;
    INSERT INTO t2 VALUES(new.x, new.y);
  END;
}

do_execsql_test 4.1 {
  INSERT INTO t1 VALUES(1, 1);
  ALTER TABLE t1 RENAME TO t11;
} 
do_catchsql_test 4.1a {
  INSERT INTO t11 VALUES(2, 2);
} {1 {no such table: main.t1}}
do_execsql_test 4.1b {
  ALTER TABLE t11 RENAME TO t1;
  ALTER TABLE t2 RENAME TO t22;
}
do_catchsql_test 4.1c {
  INSERT INTO t1 VALUES(3, 3);
} {1 {no such table: main.t2}}

proc squish {a} {
  string trim [regsub -all {[[:space:]][[:space:]]*} $a { }]
}
db func squish squish
do_test 4.2 {
  execsql { SELECT squish(sql) FROM sqlite_master WHERE name = 'tr1' }
} [list [squish {
  CREATE TRIGGER tr1 AFTER INSERT ON "t1" BEGIN
    SELECT t1.x, * FROM t1, t2;
    INSERT INTO t2 VALUES(new.x, new.y);
  END
}]]

#-------------------------------------------------------------------------
reset_db
do_execsql_test 5.0 {
  PRAGMA legacy_alter_table = 1;
  CREATE TABLE t9(a, b, c);
  CREATE TABLE t10(a, b, c);
  CREATE TEMP TABLE t9(a, b, c);

  CREATE TRIGGER temp.t9t AFTER INSERT ON temp.t9 BEGIN
    INSERT INTO t10 VALUES(new.a, new.b, new.c);
  END;

  INSERT INTO temp.t9 VALUES(1, 2, 3);
  SELECT * FROM t10;
} {1 2 3}

do_execsql_test 5.1 {
  ALTER TABLE temp.t9 RENAME TO 't1234567890'
}

do_execsql_test 5.2 {
  CREATE TABLE t1(a, b);
  CREATE TABLE t2(a, b);
  INSERT INTO t1 VALUES(1, 2);
  INSERT INTO t2 VALUES(3, 4);
  CREATE VIEW v AS SELECT one.a, one.b, t2.a, t2.b FROM t1 AS one, t2;
  SELECT * FROM v;
} {1 2 3 4}

do_execsql_test 5.3 {
  ALTER TABLE t2 RENAME TO one;
} {}

do_catchsql_test 5.4 {
  SELECT  *  FROM v
} {1 {no such table: main.t2}}

do_execsql_test 5.5 {
  ALTER TABLE one RENAME TO t2;
  DROP VIEW v;
  CREATE VIEW temp.vv AS SELECT one.a, one.b, t2.a, t2.b FROM t1 AS one, t2;
  SELECT * FROM vv;
} {1 2 3 4}

do_execsql_test 5.6 {
  ALTER TABLE t2 RENAME TO one;
} {}
do_catchsql_test 5.7 {
  SELECT  *  FROM vv
} {1 {no such table: t2}}

#-------------------------------------------------------------------------

ifcapable vtab {
  register_tcl_module db
  proc tcl_command {method args} {
    switch -- $method {
      xConnect {
        return "CREATE TABLE t1(a, b, c)"
      }
    }
    return {}
  }
  
  do_execsql_test 6.0 {
    CREATE VIRTUAL TABLE x1 USING tcl(tcl_command);
  }
  
  do_execsql_test 6.1 {
    ALTER TABLE x1 RENAME TO x2;
    SELECT sql FROM sqlite_master WHERE name = 'x2'
  } {{CREATE VIRTUAL TABLE "x2" USING tcl(tcl_command)}}
  
  do_execsql_test 7.1 {
    CREATE TABLE ddd(db, sql, zOld, zNew, bTemp);
    INSERT INTO ddd VALUES(
        'main', 'CREATE TABLE x1(i INTEGER, t TEXT)', 'ddd', NULL, 0
    ), (
        'main', 'CREATE TABLE x1(i INTEGER, t TEXT)', NULL, 'eee', 0
    ), (
        'main', NULL, 'ddd', 'eee', 0
    );
  } {}
}

#-------------------------------------------------------------------------
#
reset_db
forcedelete test.db2
do_execsql_test 8.1 {
  PRAGMA legacy_alter_table = 1;
  ATTACH 'test.db2' AS aux;
  PRAGMA foreign_keys = on;
  CREATE TABLE aux.p1(a INTEGER PRIMARY KEY, b);
  CREATE TABLE aux.c1(x INTEGER PRIMARY KEY, y REFERENCES p1(a));
  INSERT INTO aux.p1 VALUES(1, 1);
  INSERT INTO aux.p1 VALUES(2, 2);
  INSERT INTO aux.c1 VALUES(NULL, 2);
  CREATE TABLE aux.c2(x INTEGER PRIMARY KEY, y REFERENCES c1(a));
}

do_execsql_test 8.2 {
  ALTER TABLE aux.p1 RENAME TO ppp;
}

do_execsql_test 8.2 {
  INSERT INTO aux.c1 VALUES(NULL, 1);
  SELECT sql FROM aux.sqlite_master WHERE name = 'c1';
} {{CREATE TABLE c1(x INTEGER PRIMARY KEY, y REFERENCES "ppp"(a))}}

reset_db
do_execsql_test 9.0 {
  PRAGMA legacy_alter_table = 1;
  CREATE TABLE t1(a, b, c);
  CREATE VIEW v1 AS SELECT * FROM t2;
}
do_execsql_test 9.1 {
  ALTER TABLE t1 RENAME TO t3;
} {}
do_execsql_test 9.1b {
  ALTER TABLE t3 RENAME TO t1;
} {}
do_execsql_test 9.2 {
  DROP VIEW v1;
  CREATE TRIGGER tr AFTER INSERT ON t1 BEGIN
    INSERT INTO t2 VALUES(new.a);
  END;
}
do_execsql_test 9.3 {
  ALTER TABLE t1 RENAME TO t3;
} {}

forcedelete test.db2
do_execsql_test 9.4 {
  ALTER TABLE t3 RENAME TO t1;
  DROP TRIGGER tr;

  ATTACH 'test.db2' AS aux;
  CREATE TRIGGER tr AFTER INSERT ON t1 WHEN new.a IS NULL BEGIN SELECT 1, 2, 3; END;

  CREATE TABLE aux.t1(x);
  CREATE TEMP TRIGGER tr AFTER INSERT ON aux.t1 BEGIN SELECT 1, 2, 3; END;
}
do_execsql_test 9.5 {
  ALTER TABLE main.t1 RENAME TO t3;
}
do_execsql_test 9.6 {
  SELECT sql FROM sqlite_temp_master;
  SELECT sql FROM sqlite_master WHERE type='trigger';
} {
  {CREATE TRIGGER tr AFTER INSERT ON aux.t1 BEGIN SELECT 1, 2, 3; END}
  {CREATE TRIGGER tr AFTER INSERT ON "t3" WHEN new.a IS NULL BEGIN SELECT 1, 2, 3; END}
}

#-------------------------------------------------------------------------
reset_db
ifcapable fts5 {
  do_execsql_test 10.0 {
    PRAGMA legacy_alter_table = 1;
    CREATE VIRTUAL TABLE fff USING fts5(x, y, z);
  }

  do_execsql_test 10.1 {
    BEGIN;
      INSERT INTO fff VALUES('a', 'b', 'c');
      ALTER TABLE fff RENAME TO ggg;
    COMMIT;
  }

  do_execsql_test 10.2 {
    SELECT * FROM ggg;
  } {a b c}
}

#-------------------------------------------------------------------------
reset_db
forcedelete test.db2
db func trigger trigger
set ::trigger [list]
proc trigger {args} {
  lappend ::trigger $args
}
do_execsql_test 11.0 {
  PRAGMA legacy_alter_table = 1;
  ATTACH 'test.db2' AS aux;
  CREATE TABLE aux.t1(a, b, c);
  CREATE TABLE main.t1(a, b, c);
  CREATE TEMP TRIGGER tr AFTER INSERT ON aux.t1 BEGIN
    SELECT trigger(new.a, new.b, new.c);
  END;
}

do_execsql_test 11.1 {
  INSERT INTO main.t1 VALUES(1, 2, 3);
  INSERT INTO aux.t1 VALUES(4, 5, 6);
}
do_test 11.2 { set ::trigger } {{4 5 6}}

do_execsql_test 11.3 {
  SELECT name, tbl_name FROM sqlite_temp_master;
} {tr t1}

do_execsql_test 11.4 {
  ALTER TABLE main.t1 RENAME TO t2;
  SELECT name, tbl_name FROM sqlite_temp_master;
} {tr t1}

do_execsql_test 11.5 {
  ALTER TABLE aux.t1 RENAME TO t2;
  SELECT name, tbl_name FROM sqlite_temp_master;
} {tr t2}

do_execsql_test 11.6 {
  INSERT INTO aux.t2 VALUES(7, 8, 9);
}
do_test 11.7 { set ::trigger } {{4 5 6} {7 8 9}}

#-------------------------------------------------------------------------
reset_db
do_execsql_test 12.0 {
  PRAGMA legacy_alter_table = 1;
  CREATE TABLE t1(a);
  CREATE TABLE t2(w);
  CREATE TRIGGER temp.r1 AFTER INSERT ON main.t2 BEGIN
    INSERT INTO t1(a) VALUES(new.w);
  END;
  CREATE TEMP TABLE t2(x);
}

do_execsql_test 12.1 {
  ALTER TABLE main.t2 RENAME TO t3;
}

do_execsql_test 12.2 {
  INSERT INTO t3 VALUES('WWW');
  SELECT * FROM t1;
} {WWW}


#-------------------------------------------------------------------------
reset_db

ifcapable rtree {
  do_execsql_test 14.0 {
    PRAGMA legacy_alter_table = 1;
    CREATE VIRTUAL TABLE rt USING rtree(id, minx, maxx, miny, maxy);

    CREATE TABLE "mytable" ( "fid" INTEGER PRIMARY KEY, "geom" BLOB);

    CREATE TRIGGER tr1 AFTER UPDATE OF "geom" ON "mytable" 
          WHEN OLD."fid" = NEW."fid" AND NEW."geom" IS NULL BEGIN 
      DELETE FROM rt WHERE id = OLD."fid"; 
    END;

    INSERT INTO mytable VALUES(1, X'abcd');
  }

  do_execsql_test 14.1 {
    UPDATE mytable SET geom = X'1234'
  }

  do_execsql_test 14.2 {
    ALTER TABLE mytable RENAME TO mytable_renamed;
  }

  do_execsql_test 14.3 {
    CREATE TRIGGER tr2 AFTER INSERT ON mytable_renamed BEGIN
      DELETE FROM rt WHERE id=(SELECT min(id) FROM rt);
    END;
  }

  do_execsql_test 14.4 {
    ALTER TABLE mytable_renamed RENAME TO mytable2;
  }
}

reset_db
do_execsql_test 14.5 {
  PRAGMA legacy_alter_table = 1;
  CREATE TABLE t1(a, b, c);
  CREATE VIEW v1 AS SELECT * FROM t1;
  CREATE TRIGGER xyz AFTER INSERT ON t1 BEGIN
    SELECT a, b FROM v1;
  END;
}
do_execsql_test 14.6 {
  ALTER TABLE t1 RENAME TO tt1;
}


finish_test

Changes to test/altermalloc2.test.

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} -body {
  execsql {
    ALTER TABLE t1 RENAME abcd TO dcba
  }
} -test {
  faultsim_test_result {0 {}}
}


























finish_test







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} -body {
  execsql {
    ALTER TABLE t1 RENAME abcd TO dcba
  }
} -test {
  faultsim_test_result {0 {}}
}

reset_db
do_execsql_test 4.0 {
  CREATE TABLE rr(a, b);
  CREATE VIEW vv AS SELECT * FROM rr;

  CREATE TRIGGER vv1 INSTEAD OF INSERT ON vv BEGIN
    SELECT 1, 2, 3;
  END;
  CREATE TRIGGER tr1 AFTER INSERT ON rr BEGIN
    INSERT INTO vv VALUES(new.a, new.b);
  END;
} {}

faultsim_save_and_close
do_faultsim_test 4 -faults oom-* -prep {
  faultsim_restore_and_reopen
  execsql { SELECT * FROM sqlite_master }
} -body {
  execsql {
    ALTER TABLE rr RENAME a TO c;
  }
} -test {
  faultsim_test_result {0 {}} 
}

finish_test

Added test/altertab2.test.





























































































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# 2018 September 30
#
# 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.
#
#*************************************************************************
#

set testdir [file dirname $argv0]
source $testdir/tester.tcl
set testprefix altertab

# If SQLITE_OMIT_ALTERTABLE is defined, omit this file.
ifcapable !altertable {
  finish_test
  return
}

ifcapable fts5 {
  do_execsql_test 1.0 {
    CREATE TABLE rr(a, b);
    CREATE VIRTUAL TABLE ff USING fts5(a, b);
    CREATE TRIGGER tr1 AFTER INSERT ON rr BEGIN
      INSERT INTO ff VALUES(new.a, new.b);
    END;
    INSERT INTO rr VALUES('hello', 'world');
    SELECT * FROM ff;
  } {hello world}

  do_execsql_test 1.1 {
    ALTER TABLE ff RENAME TO ffff;
  }

  do_execsql_test 1.2 {
    INSERT INTO rr VALUES('in', 'tcl');
    SELECT * FROM ffff;
  } {hello world in tcl}
}


finish_test

Changes to tool/mkpragmatab.tcl.

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  FLAG: Result0

  NAME: threads
  FLAG: Result0

  NAME: optimize
  FLAG: Result1 NeedSchema





}

# Open the output file
#
set destfile "[file dir [file dir [file normal $argv0]]]/src/pragma.h"
puts "Overwriting $destfile with new pragma table..."
set fd [open $destfile wb]







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  FLAG: Result0

  NAME: threads
  FLAG: Result0

  NAME: optimize
  FLAG: Result1 NeedSchema

  NAME: legacy_alter_table
  TYPE: FLAG
  ARG:  SQLITE_LegacyAlter
  IF:   !defined(SQLITE_OMIT_FLAG_PRAGMAS)
}

# Open the output file
#
set destfile "[file dir [file dir [file normal $argv0]]]/src/pragma.h"
puts "Overwriting $destfile with new pragma table..."
set fd [open $destfile wb]