SQLite

**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains C code routines that are called by the parser
** to handle INSERT statements in SQLite.
**
** $Id: insert.c,v 1.239 2008/05/29 03:20:59 drh Exp $
*/
#include "sqliteInt.h"

/*
** Set P4 of the most recently inserted opcode to a column affinity
** string for index pIdx. A column affinity string has one character
** for each column in the table, according to the affinity of the column:

    assert( v );
    pParse->nMem++;         /* Holds name of table */
    memId = ++pParse->nMem;
    pParse->nMem++;
    sqlite3OpenTable(pParse, iCur, iDb, pDb->pSchema->pSeqTab, OP_OpenRead);
    addr = sqlite3VdbeCurrentAddr(v);
    sqlite3VdbeAddOp4(v, OP_String8, 0, memId-1, 0, pTab->zName, 0);
    sqlite3VdbeAddOp2(v, OP_Rewind, iCur, addr+9);
    sqlite3VdbeAddOp3(v, OP_Column, iCur, 0, memId);
    sqlite3VdbeAddOp3(v, OP_Ne, memId-1, addr+7, memId);
    sqlite3VdbeChangeP5(v, SQLITE_JUMPIFNULL);
    sqlite3VdbeAddOp2(v, OP_Rowid, iCur, memId+1);
    sqlite3VdbeAddOp3(v, OP_Column, iCur, 1, memId);
    sqlite3VdbeAddOp2(v, OP_Goto, 0, addr+9);
    sqlite3VdbeAddOp2(v, OP_Next, iCur, addr+2);
    sqlite3VdbeAddOp2(v, OP_Integer, 0, memId);
    sqlite3VdbeAddOp2(v, OP_Close, iCur, 0);
  }
  return memId;
}

/*
** Update the maximum rowid for an autoincrement calculation.

# 2004 November 12
#
# 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.  The
# focus of this script is testing the AUTOINCREMENT features.
#
# $Id: autoinc.test,v 1.12 2008/05/29 03:20:59 drh Exp $
#

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

# If the library is not compiled with autoincrement support then
# skip all tests in this file.

  sqlite3_step $STMT
  sqlite3_finalize $STMT
  execsql {
    INSERT INTO t1 VALUES(NULL);
    SELECT * FROM t1;
  }
} {1}

# Ticket #3148
# Make sure the sqlite_sequence table is not damaged when doing
# an empty insert - an INSERT INTO ... SELECT ... where the SELECT
# clause returns an empty set.
#
do_test autoinc-9.1 {
  db eval {
    CREATE TABLE t2(x INTEGER PRIMARY KEY AUTOINCREMENT, y);
    INSERT INTO t2 VALUES(NULL, 1);
    CREATE TABLE t3(a INTEGER PRIMARY KEY AUTOINCREMENT, b);
    INSERT INTO t3 SELECT * FROM t2 WHERE y>1;

    SELECT * FROM sqlite_sequence WHERE name='t3';
  }
} {t3 0}


finish_test