Add the sqlite3_next_stmt() interface, including test cases. (CVS 5243)

FossilOrigin-Name: 565a530896b40790287eeaad709edd51980fbddf

manifest

@@ -1,5 +1,5 @@
-C Fix\sa\sbug\sin\sthe\snoop-mutex\simplementation.\s(CVS\s5242)
-D 2008-06-19T01:50:09
+C Add\sthe\ssqlite3_next_stmt()\sinterface,\sincluding\stest\scases.\s(CVS\s5243)
+D 2008-06-19T02:52:25
 F Makefile.arm-wince-mingw32ce-gcc ac5f7b2cef0cd850d6f755ba6ee4ab961b1fadf7
 F Makefile.in ff6f90048555a0088f6a4b7406bed5e55a7c4eff
 F Makefile.linux-gcc d53183f4aa6a9192d249731c90dbdffbd2c68654
@@ -143,13 +143,13 @@ F src/printf.c 8b063da9dcde26b7c500a01444b718d86f21bc6e
 F src/random.c 5c754319d38abdd6acd74601ee0105504adc508a
 F src/select.c 669687459e7d0193c89de06c5dbed55b4a41191c
 F src/shell.c a12ea645271b7876c8f080146f48e20b00d367ec
-F src/sqlite.h.in f69427508e76eec76dae7f5fffdfefc05a9d4329
+F src/sqlite.h.in 2590420afe3c9c5a05ee7269f32c3c6f4b06c053
 F src/sqlite3ext.h faacd0e6a81aabee0861c6d7883c9172e74ef5b3
 F src/sqliteInt.h 6dd55232e738a4dac23475cd4b0e444dff75c896
 F src/sqliteLimit.h f435e728c6b620ef7312814d660a81f9356eb5c8
 F src/table.c 1fa8f8113ac9cbc09ae4801c6d2a7f0af82c5822
 F src/tclsqlite.c 4dd9ee4cb44846ad9bcc4d0da8088c1e7d4b33d9
-F src/test1.c 736be7dea5cc126356bbb61a4b1ac5ff4fac7994
+F src/test1.c e78c07d7f1db40593ab1e4aa321016184af0c7ad
 F src/test2.c c46d146019ab6e37474e66b3c789e5237d9ea7b7
 F src/test3.c 01ff03164cf6a2bededa3b44ecd481603e2644fc
 F src/test4.c c2c0f5dc907f1346f5d4b65eb5799f11eb9e4071
@@ -184,7 +184,7 @@ F src/vacuum.c 14eb21b480924d87e791cd8ab6fb35ac563243ef
 F src/vdbe.c f6866986de706b98c2738040bc65907728650e8d
 F src/vdbe.h 1e3722d471739c2b213c6283b60373290e52f7ea
 F src/vdbeInt.h de321b2c02593e1420106634ed1f5a7d77ad35a7
-F src/vdbeapi.c 9cf3207a58e484c74c60d61ac037c1cad8aa5b65
+F src/vdbeapi.c a7c6b8db324cf7eccff32de871dea36aa305c994
 F src/vdbeaux.c 09d7a6923d4d71d7028e0d72b9d146d3ece6054e
 F src/vdbeblob.c 9345f6dcd675fdcfdb537d2d2f487542d9ea136a
 F src/vdbefifo.c c46dae1194e4277bf007144d7e5b0c0b1c24f136
@@ -228,6 +228,7 @@ F test/capi2.test cc64df7560a96f848f919ea2926c60acf639684b
 F test/capi3.test d3848b06fb36d43b73aca6e22c44f734e14e5c3b
 F test/capi3b.test 664eb55318132f292f2c436f90906f578cad6b97
 F test/capi3c.test 208713e5f3a63442c3574c55b83baa7cf8ac5f28
+F test/capi3d.test 537de3a1f724862e327e02bb21b4a84f185dc1e2
 F test/cast.test ce8f14fc80f70b30ed984480cc0d8914a459e8f9
 F test/check.test 024ed399600b799160378cf9d9f436bdf5dfd184
 F test/collate1.test e3eaa48c21e150814be1a7b852d2a8af24458d04
@@ -598,7 +599,7 @@ F tool/speedtest16.c c8a9c793df96db7e4933f0852abb7a03d48f2e81
 F tool/speedtest2.tcl ee2149167303ba8e95af97873c575c3e0fab58ff
 F tool/speedtest8.c 1dbced29de5f59ba2ebf877edcadf171540374d1
 F tool/speedtest8inst1.c 293327bc76823f473684d589a8160bde1f52c14e
-P 005f8eaef5ae05cef5c76f3afe299eaa2cf8af2f
-R bb3c0fc73a660955ea9906ca7b361daf
+P eec9a54dc3554a00ea69fc8e26d205f30a3bcabd
+R c8ee455d2762ac91cbcc6d328820d18d
 U drh
-Z a303ab4342edea1fe35b42a109e80885
+Z 1aaf0ee87bfe5a8385c7655d6421e7d4

manifest.uuid

@@ -1 +1 @@
-eec9a54dc3554a00ea69fc8e26d205f30a3bcabd
+565a530896b40790287eeaad709edd51980fbddf

src/sqlite.h.in

@@ -30,7 +30,7 @@
 ** the version number) and changes its name to "sqlite3.h" as
 ** part of the build process.
 **
-** @(#) $Id: sqlite.h.in,v 1.337 2008/06/19 00:16:08 drh Exp $
+** @(#) $Id: sqlite.h.in,v 1.338 2008/06/19 02:52:25 drh Exp $
 */
 #ifndef _SQLITE3_H_
 #define _SQLITE3_H_
@@ -4739,6 +4739,39 @@ int sqlite3_get_autocommit(sqlite3*);
 */
 sqlite3 *sqlite3_db_handle(sqlite3_stmt*);
 
+/*
+** CAPI3REF:  Find the next prepared statement {F13140}
+**
+** Return a pointer to the next [prepared statement] after pStmt
+** associated with [database connection] pDb.  If pStmt is NULL
+** then return a pointer to the first [prepared statement] associated
+** with the [database connection] pDb.  If no [prepared statement]
+** satisfies the conditions of this routine, return NULL.
+**
+** INVARIANTS:
+**
+** {F13143} If D is a [database connection] that holds one or more
+**          unfinalized [prepared statements] and S is a NULL pointer,
+**          then [sqlite3_next_stmt(D, S)] routine shall return a pointer
+**          to one of the [prepared statements] associated with D.
+**
+** {F13146} If D is a [database connection] that holds no
+**          unfinalized [prepared statements] and S is a NULL pointer,
+**          then [sqlite3_next_stmt(D, S)] routine shall return a NULL
+**          pointer.
+**
+** {F13149} If S is a [prepared statement] in [database connection] D
+**          and S is not the last [prepared statement] in D, then
+**          [sqlite3_next_stmt(D, S)] routine shall return a pointer
+**          to the next [prepared statement] in D after S.
+**
+** {F13152} If S is the last [prepared statement] in [database connection] D
+**          then [sqlite3_next_stmt(D, S)] routine shall return a NULL
+**          pointer.
+**
+*/
+sqlite3_stmt *sqlite3_next_stmt(sqlite3 *pDb, sqlite3_stmt *pStmt);
+
 
 /*
 ** CAPI3REF: Commit And Rollback Notification Callbacks {F12950}

src/test1.c

@@ -13,7 +13,7 @@
 ** is not included in the SQLite library.  It is used for automated
 ** testing of the SQLite library.
 **
-** $Id: test1.c,v 1.305 2008/05/29 02:57:48 shane Exp $
+** $Id: test1.c,v 1.306 2008/06/19 02:52:25 drh Exp $
 */
 #include "sqliteInt.h"
 #include "tcl.h"
@@ -1898,6 +1898,38 @@ static int test_finalize(
   return TCL_OK;
 }
 
+/*
+** Usage:  sqlite3_next_stmt  DB  STMT
+**
+** Return the next statment in sequence after STMT.
+*/
+static int test_next_stmt(
+  void * clientData,
+  Tcl_Interp *interp,
+  int objc,
+  Tcl_Obj *CONST objv[]
+){
+  sqlite3_stmt *pStmt;
+  sqlite3 *db = 0;
+  char zBuf[50];
+
+  if( objc!=3 ){
+    Tcl_AppendResult(interp, "wrong # args: should be \"",
+        Tcl_GetStringFromObj(objv[0], 0), " DB STMT", 0);
+    return TCL_ERROR;
+  }
+
+  if( getDbPointer(interp, Tcl_GetString(objv[1]), &db) ) return TCL_ERROR;
+  if( getStmtPointer(interp, Tcl_GetString(objv[2]), &pStmt) ) return TCL_ERROR;
+  pStmt = sqlite3_next_stmt(db, pStmt);
+  if( pStmt ){
+    if( sqlite3TestMakePointerStr(interp, zBuf, pStmt) ) return TCL_ERROR;
+    Tcl_AppendResult(interp, zBuf, 0);
+  }
+  return TCL_OK;
+}
+
+
 /*
 ** Usage:  sqlite3_reset  STMT 
 **
@@ -4605,6 +4637,7 @@ int Sqlitetest1_Init(Tcl_Interp *interp){
      { "sqlite3_transfer_bindings",     test_transfer_bind ,0 },
      { "sqlite3_changes",               test_changes       ,0 },
      { "sqlite3_step",                  test_step          ,0 },
+     { "sqlite3_next_stmt",             test_next_stmt     ,0 },
 
      { "sqlite3_release_memory",        test_release_memory,     0},
      { "sqlite3_soft_heap_limit",       test_soft_heap_limit,    0},

src/vdbeapi.c

@@ -13,7 +13,7 @@
 ** This file contains code use to implement APIs that are part of the
 ** VDBE.
 **
-** $Id: vdbeapi.c,v 1.133 2008/06/18 17:09:10 danielk1977 Exp $
+** $Id: vdbeapi.c,v 1.134 2008/06/19 02:52:25 drh Exp $
 */
 #include "sqliteInt.h"
 #include "vdbeInt.h"
@@ -1256,3 +1256,21 @@ int sqlite3_transfer_bindings(sqlite3_stmt *pFromStmt, sqlite3_stmt *pToStmt){
 sqlite3 *sqlite3_db_handle(sqlite3_stmt *pStmt){
   return pStmt ? ((Vdbe*)pStmt)->db : 0;
 }
+
+/*
+** Return a pointer to the next prepared statement after pStmt associated
+** with database connection pDb.  If pStmt is NULL, return the first
+** prepared statement for the database connection.  Return NULL if there
+** are no more.
+*/
+sqlite3_stmt *sqlite3_next_stmt(sqlite3 *pDb, sqlite3_stmt *pStmt){
+  sqlite3_stmt *pNext;
+  sqlite3_mutex_enter(pDb->mutex);
+  if( pStmt==0 ){
+    pNext = (sqlite3_stmt*)pDb->pVdbe;
+  }else{
+    pNext = (sqlite3_stmt*)((Vdbe*)pStmt)->pNext;
+  }
+  sqlite3_mutex_leave(pDb->mutex);
+  return pNext;
+}

test/capi3d.test

@@ -0,0 +1,92 @@
+# 2008 June 18
+#
+# 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.
+#
+#***********************************************************************
+# This file implements regression tests for SQLite library.  
+#
+# This file is devoted to testing the sqlite3_next_stmt interface.
+#
+# $Id: capi3d.test,v 1.1 2008/06/19 02:52:25 drh Exp $
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+# Create N prepared statements against database connection db
+# and return a list of all the generated prepared statements.
+#
+proc make_prepared_statements {N} {
+  set plist {}
+  for {set i 0} {$i<$N} {incr i} {
+    set sql "SELECT $i FROM sqlite_master WHERE name LIKE '%$i%'"
+    if {rand()<0.33} {    
+      set s [sqlite3_prepare_v2 db $sql -1 notused]
+    } else {
+      ifcapable utf16 {
+        if {rand()<0.5} {
+          set sql [encoding convertto unicode $sql]\x00\x00
+          set s [sqlite3_prepare16 db $sql -1 notused]
+        } else {
+          set s [sqlite3_prepare db $sql -1 notused]
+        }
+      }
+      ifcapable !utf16 {
+        set s [sqlite3_prepare db $sql -1 notused]
+      }
+    }
+    lappend plist $s
+  }
+  return $plist
+}
+
+
+# Scramble the $inlist into a random order.
+#
+proc scramble {inlist} {
+  set y {}
+  foreach x $inlist {
+    lappend y [list [expr {rand()}] $x]
+  }
+  set y [lsort $y]
+  set outlist {}
+  foreach x $y {
+    lappend outlist [lindex $x 1]
+  }
+  return $outlist
+}
+
+# Database initially has no prepared statements.
+#
+do_test capi3d-1.1 {
+  sqlite3_next_stmt db 0
+} {}
+
+# Run the following tests for between 1 and 100 prepared statements.
+#
+for {set i 1} {$i<=100} {incr i} {
+  set stmtlist [make_prepared_statements $i]
+  do_test capi3d-1.2.$i.1 {
+    set p [sqlite3_next_stmt db 0]
+    set x {}
+    while {$p!=""} {
+      lappend x $p
+      set p [sqlite3_next_stmt db $p]
+    }
+    lsort $x
+  } [lsort $stmtlist]
+  do_test capi3-1.2.$i.2 {
+    foreach p [scramble $::stmtlist] {
+      sqlite3_finalize $p
+    }
+    sqlite3_next_stmt db 0
+  } {}
+}
+      
+
+finish_test