SQLite

**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains the implementation of the sqlite3_prepare()
** interface, and routines that contribute to loading the database schema
** from disk.
**
** $Id: prepare.c,v 1.42 2007/01/08 21:07:18 drh Exp $
*/
#include "sqliteInt.h"
#include "os.h"
#include <ctype.h>

/*
** Fill the InitData structure with an error message that indicates

  rc = sqlite3Prepare(db, zSql, -1, 0, (sqlite3_stmt**)&pNew, 0);
  if( rc ){
    assert( pNew==0 );
    return 0;
  }else{
    assert( pNew!=0 );
  }
  sqlite3VdbeSwap(pNew, p);
  sqlite3_transfer_bindings((sqlite3_stmt*)pNew, (sqlite3_stmt*)p);
  sqlite3_finalize((sqlite3_stmt*)pNew);
  return 1;
}


/*
** Two versions of the official API.  Legacy and new use.  In the legacy

*************************************************************************
** Header file for the Virtual DataBase Engine (VDBE)
**
** This header defines the interface to the virtual database engine
** or VDBE.  The VDBE implements an abstract machine that runs a
** simple program to access and modify the underlying database.
**
** $Id: vdbe.h,v 1.107 2007/01/08 21:07:18 drh Exp $
*/
#ifndef _SQLITE_VDBE_H_
#define _SQLITE_VDBE_H_
#include <stdio.h>

/*
** A single VDBE is an opaque structure named "Vdbe".  Only routines

int sqliteVdbeSetVariables(Vdbe*,int,const char**);
void sqlite3VdbeSetNumCols(Vdbe*,int);
int sqlite3VdbeSetColName(Vdbe*, int, int, const char *, int);
void sqlite3VdbeCountChanges(Vdbe*);
sqlite3 *sqlite3VdbeDb(Vdbe*);
void sqlite3VdbeSetSql(Vdbe*, const char *z, int n);
const char *sqlite3VdbeGetSql(Vdbe*);
void sqlite3VdbeSwap(Vdbe*,Vdbe*);

#ifndef NDEBUG
  void sqlite3VdbeComment(Vdbe*, const char*, ...);
# define VdbeComment(X)  sqlite3VdbeComment X
#else
# define VdbeComment(X)
#endif

#endif

** Return the SQL associated with a prepared statement
*/
const char *sqlite3VdbeGetSql(Vdbe *p){
  return p->zSql;
}

/*
** Swap all content between two VDBE structures.

*/
void sqlite3VdbeSwap(Vdbe *pA, Vdbe *pB){
  Vdbe tmp, *pTmp;
  char *zTmp;
  int nTmp;
  tmp = *pA;
  *pA = *pB;
  *pB = tmp;
  pTmp = pA->pNext;
  pA->pNext = pB->pNext;
  pB->pNext = pTmp;
  pTmp = pA->pPrev;
  pA->pPrev = pB->pPrev;
  pB->pPrev = pTmp;
  zTmp = pA->zSql;
  pA->zSql = pB->zSql;
  pB->zSql = zTmp;
  nTmp = pA->nSql;
  pA->nSql = pB->nSql;
  pB->nSql = nTmp;
}

/*
** Turn tracing on or off
*/
void sqlite3VdbeTrace(Vdbe *p, FILE *trace){
  p->trace = trace;

#
#***********************************************************************
# This file implements regression tests for SQLite library.  
#
# This is a copy of the capi3.test file that has been adapted to
# test the new sqlite3_prepare_v2 interface.
#
# $Id: capi3c.test,v 1.2 2007/01/08 21:07:18 drh Exp $
#

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

# Return the UTF-16 representation of the supplied UTF-8 string $str.
# If $nt is true, append two 0x00 bytes as a nul terminator.

  set r [encoding convertfrom unicode $str]
  return $r
}

# These tests complement those in capi2.test. They are organized
# as follows:
#
# capi3c-1.*: Test sqlite3_prepare_v2 
# capi3c-2.*: Test sqlite3_prepare16_v2 
# capi3c-3.*: Test sqlite3_open
# capi3c-4.*: Test sqlite3_open16
# capi3c-5.*: Test the various sqlite3_result_* APIs
# capi3c-6.*: Test that sqlite3_close fails if there are outstanding VMs.
#

set DB [sqlite3_connection_pointer db]

do_test capi3c-1.0 {
  sqlite3_get_autocommit $DB
} 1
do_test capi3c-1.1 {
  set STMT [sqlite3_prepare_v2 $DB {SELECT name FROM sqlite_master} -1 TAIL]
  sqlite3_finalize $STMT
  set TAIL
} {}
do_test capi3c-1.2 {
  sqlite3_errcode $DB
} {SQLITE_OK}
do_test capi3c-1.3 {
  sqlite3_errmsg $DB
} {not an error}
do_test capi3c-1.4 {
  set sql {SELECT name FROM sqlite_master;SELECT 10}
  set STMT [sqlite3_prepare_v2 $DB $sql -1 TAIL]
  sqlite3_finalize $STMT
  set TAIL
} {SELECT 10}
do_test capi3c-1.5 {
  set sql {SELECT namex FROM sqlite_master}
  catch {
    set STMT [sqlite3_prepare_v2 $DB $sql -1 TAIL]
  }
} {1}
do_test capi3c-1.6 {
  sqlite3_errcode $DB
} {SQLITE_ERROR}
do_test capi3c-1.7 {
  sqlite3_errmsg $DB
} {no such column: namex}

ifcapable {utf16} {
  do_test capi3c-2.1 {
    set sql16 [utf16 {SELECT name FROM sqlite_master}]
    set STMT [sqlite3_prepare16_v2  $DB $sql16 -1 ::TAIL]
    sqlite3_finalize $STMT
    utf8 $::TAIL
  } {}
  do_test capi3c-2.2 {
    set sql [utf16 {SELECT name FROM sqlite_master;SELECT 10}]
    set STMT [sqlite3_prepare16_v2  $DB $sql -1 TAIL]
    sqlite3_finalize $STMT
    utf8 $TAIL
  } {SELECT 10}
  do_test capi3c-2.3 {
    set sql [utf16 {SELECT namex FROM sqlite_master}]
    catch {
      set STMT [sqlite3_prepare16_v2  $DB $sql -1 TAIL]
    }
  } {1}
  do_test capi3c-2.4 {
    sqlite3_errcode $DB
  } {SQLITE_ERROR}
  do_test capi3c-2.5 {
    sqlite3_errmsg $DB
  } {no such column: namex}

  ifcapable schema_pragmas {
    do_test capi3c-2.6 {
      execsql {CREATE TABLE tablename(x)}
      set sql16 [utf16 {PRAGMA table_info("TableName")}]
      set STMT [sqlite3_prepare16_v2  $DB $sql16 -1 TAIL]
      sqlite3_step $STMT
    } SQLITE_ROW
    do_test capi3c-2.7 {
      sqlite3_step $STMT
    } SQLITE_DONE
    do_test capi3c-2.8 {
      sqlite3_finalize $STMT
    } SQLITE_OK
  }

} ;# endif utf16

# rename sqlite3_open sqlite3_open_old
# proc sqlite3_open {fname options} {sqlite3_open_new $fname $options}

do_test capi3c-3.1 {
  set db2 [sqlite3_open test.db {}]
  sqlite3_errcode $db2
} {SQLITE_OK}
# FIX ME: Should test the db handle works.
do_test capi3c-3.2 {
  sqlite3_close $db2
} {SQLITE_OK}
do_test capi3c-3.3 {
  catch {
    set db2 [sqlite3_open /bogus/path/test.db {}]
  }
  sqlite3_errcode $db2
} {SQLITE_CANTOPEN}
do_test capi3c-3.4 {
  sqlite3_errmsg $db2
} {unable to open database file}
do_test capi3c-3.5 {
  sqlite3_close $db2
} {SQLITE_OK}
do_test capi3c-3.6.1-misuse {
  sqlite3_close $db2
} {SQLITE_MISUSE}
do_test capi3c-3.6.2-misuse {
  sqlite3_errmsg $db2
} {library routine called out of sequence}
ifcapable {utf16} {
  do_test capi3c-3.6.3-misuse {
    utf8 [sqlite3_errmsg16 $db2]
  } {library routine called out of sequence}
}

# rename sqlite3_open ""
# rename sqlite3_open_old sqlite3_open

ifcapable {utf16} {
do_test capi3c-4.1 {
  set db2 [sqlite3_open16 [utf16 test.db] {}]
  sqlite3_errcode $db2
} {SQLITE_OK}
# FIX ME: Should test the db handle works.
do_test capi3c-4.2 {
  sqlite3_close $db2
} {SQLITE_OK}
do_test capi3c-4.3 {
  catch {
    set db2 [sqlite3_open16 [utf16 /bogus/path/test.db] {}]
  }
  sqlite3_errcode $db2
} {SQLITE_CANTOPEN}
do_test capi3c-4.4 {
  utf8 [sqlite3_errmsg16 $db2]
} {unable to open database file}
do_test capi3c-4.5 {
  sqlite3_close $db2
} {SQLITE_OK}
} ;# utf16

# This proc is used to test the following API calls:
#
# sqlite3_column_count

}

ifcapable !floatingpoint {
  finish_test
  return
}

do_test capi3c-5.0 {
  execsql {
    CREATE TABLE t1(a VARINT, b BLOB, c VARCHAR(16));
    INSERT INTO t1 VALUES(1, 2, 3);
    INSERT INTO t1 VALUES('one', 'two', NULL);
    INSERT INTO t1 VALUES(1.2, 1.3, 1.4);
  }
  set sql "SELECT * FROM t1"
  set STMT [sqlite3_prepare_v2 $DB $sql -1 TAIL]
  sqlite3_column_count $STMT
} 3

check_header $STMT capi3c-5.1 {a b c} {VARINT BLOB VARCHAR(16)}
check_origin_header $STMT capi3c-5.1 {main main main} {t1 t1 t1} {a b c}
do_test capi3c-5.2 {
  sqlite3_step $STMT
} SQLITE_ROW

check_header $STMT capi3c-5.3 {a b c} {VARINT BLOB VARCHAR(16)}
check_origin_header $STMT capi3c-5.3 {main main main} {t1 t1 t1} {a b c}
check_data $STMT capi3c-5.4 {INTEGER INTEGER TEXT} {1 2 3} {1.0 2.0 3.0} {1 2 3}

do_test capi3c-5.5 {
  sqlite3_step $STMT
} SQLITE_ROW

check_header $STMT capi3c-5.6 {a b c} {VARINT BLOB VARCHAR(16)}
check_origin_header $STMT capi3c-5.6 {main main main} {t1 t1 t1} {a b c}
check_data $STMT capi3c-5.7 {TEXT TEXT NULL} {0 0 0} {0.0 0.0 0.0} {one two {}}

do_test capi3c-5.8 {
  sqlite3_step $STMT
} SQLITE_ROW

check_header $STMT capi3c-5.9 {a b c} {VARINT BLOB VARCHAR(16)}
check_origin_header $STMT capi3c-5.9 {main main main} {t1 t1 t1} {a b c}
check_data $STMT capi3c-5.10 {FLOAT FLOAT TEXT} {1 1 1} {1.2 1.3 1.4} {1.2 1.3 1.4}

do_test capi3c-5.11 {
  sqlite3_step $STMT
} SQLITE_DONE

do_test capi3c-5.12 {
  sqlite3_finalize $STMT
} SQLITE_OK

do_test capi3c-5.20 {
  set sql "SELECT a, sum(b), max(c) FROM t1 GROUP BY a"
  set STMT [sqlite3_prepare_v2 $DB $sql -1 TAIL]
  sqlite3_column_count $STMT
} 3

check_header $STMT capi3c-5.21 {a sum(b) max(c)} {VARINT {} {}}
check_origin_header $STMT capi3c-5.22 {main {} {}} {t1 {} {}} {a {} {}}
do_test capi3c-5.23 {
  sqlite3_finalize $STMT
} SQLITE_OK


set ::ENC [execsql {pragma encoding}]
db close

do_test capi3c-6.0 {
btree_breakpoint
  sqlite3 db test.db
  set DB [sqlite3_connection_pointer db]
btree_breakpoint
  sqlite3_key $DB xyzzy
  set sql {SELECT a FROM t1 order by rowid}
  set STMT [sqlite3_prepare_v2 $DB $sql -1 TAIL]
  expr 0
} {0}
do_test capi3c-6.1 {
  db cache flush
  sqlite3_close $DB
} {SQLITE_BUSY}
do_test capi3c-6.2 {
  sqlite3_step $STMT
} {SQLITE_ROW}
check_data $STMT capi3c-6.3 {INTEGER} {1} {1.0} {1}
do_test capi3c-6.3 {
  sqlite3_finalize $STMT
} {SQLITE_OK}
do_test capi3c-6.4 {
  db cache flush
  sqlite3_close $DB
} {SQLITE_OK}
do_test capi3c-6.99-misuse {
  db close
} {}

if {![sqlite3 -has-codec]} {
  # Test what happens when the library encounters a newer file format.
  # Do this by updating the file format via the btree layer.
  do_test capi3c-7.1 {
    set ::bt [btree_open test.db 10 0]
    btree_begin_transaction $::bt
    set meta [btree_get_meta $::bt]
    lset meta 2 5
    eval [concat btree_update_meta $::bt [lrange $meta 0 end]]
    btree_commit $::bt
    btree_close $::bt
  } {}
  do_test capi3c-7.2 {
    sqlite3 db test.db
    catchsql {
      SELECT * FROM sqlite_master;
    }
  } {1 {unsupported file format}}
  db close
}

if {![sqlite3 -has-codec]} {
  # Now test that the library correctly handles bogus entries in the
  # sqlite_master table (schema corruption).
  do_test capi3c-8.1 {
    file delete -force test.db
    file delete -force test.db-journal
    sqlite3 db test.db
    execsql {
      CREATE TABLE t1(a);
    }
    db close
  } {}
  do_test capi3c-8.2 {
    set ::bt [btree_open test.db 10 0]
    btree_begin_transaction $::bt
    set ::bc [btree_cursor $::bt 1 1]

    # Build a 5-field row record consisting of 5 null records. This is
    # officially black magic.
    catch {unset data}
    set data [binary format c6 {6 0 0 0 0 0}]
    btree_insert $::bc 5 $data

    btree_close_cursor $::bc
    btree_commit $::bt
    btree_close $::bt
  } {}
  do_test capi3c-8.3 {
    sqlite3 db test.db
    catchsql {
      SELECT * FROM sqlite_master;
    }
  } {1 {malformed database schema}}
  do_test capi3c-8.4 {
    set ::bt [btree_open test.db 10 0]
    btree_begin_transaction $::bt
    set ::bc [btree_cursor $::bt 1 1]
  
    # Build a 5-field row record. The first field is a string 'table', and
    # subsequent fields are all NULL. Replace the other broken record with
    # this one and try to read the schema again. The broken record uses
    # either UTF-8 or native UTF-16 (if this file is being run by
    # utf16.test).
    if { [string match UTF-16* $::ENC] } {
      set data [binary format c6a10 {6 33 0 0 0 0} [utf16 table]]
    } else {
      set data [binary format c6a5 {6 23 0 0 0 0} table]
    }
    btree_insert $::bc 5 $data
  
    btree_close_cursor $::bc
    btree_commit $::bt
    btree_close $::bt
  } {};
  do_test capi3c-8.5 {
    db close 
    sqlite3 db test.db
    catchsql {
      SELECT * FROM sqlite_master;
    }
  } {1 {malformed database schema}}
  db close

SQLITE_RANGE      {bind or column index out of range} \
SQLITE_NOTADB     {file is encrypted or is not a database} \
unknownerror      {unknown error} \
]

set test_number 1
foreach {code english} $code2english {
  do_test capi3c-9.$test_number "sqlite3_test_errstr $code" $english
  incr test_number
}

# Test the error message when a "real" out of memory occurs.
if {[info command sqlite_malloc_stat]!=""} {
set sqlite_malloc_fail 1
do_test capi3c-10-1 {
  sqlite3 db test.db
  set DB [sqlite3_connection_pointer db]
  sqlite_malloc_fail 1
  catchsql {
    select * from sqlite_master;
  }
} {1 {out of memory}}
do_test capi3c-10-2 {
  sqlite3_errmsg $::DB
} {out of memory}
ifcapable {utf16} {
  do_test capi3c-10-3 {
    utf8 [sqlite3_errmsg16 $::DB]
  } {out of memory}
}
db close
sqlite_malloc_fail 0
}

# The following tests - capi3c-11.* - test that a COMMIT or ROLLBACK
# statement issued while there are still outstanding VMs that are part of
# the transaction fails.
sqlite3 db test.db
set DB [sqlite3_connection_pointer db]
sqlite_register_test_function $DB func
do_test capi3c-11.1 {
  execsql {
    BEGIN;
    CREATE TABLE t1(a, b);
    INSERT INTO t1 VALUES(1, 'int');
    INSERT INTO t1 VALUES(2, 'notatype');
  }
} {}
do_test capi3c-11.1.1 {
  sqlite3_get_autocommit $DB
} 0
do_test capi3c-11.2 {
  set STMT [sqlite3_prepare_v2 $DB "SELECT func(b, a) FROM t1" -1 TAIL]
  sqlite3_step $STMT
} {SQLITE_ROW}
do_test capi3c-11.3 {
  catchsql {
    COMMIT;
  }
} {1 {cannot commit transaction - SQL statements in progress}}
do_test capi3c-11.3.1 {
  sqlite3_get_autocommit $DB
} 0
do_test capi3c-11.4 {
  sqlite3_step $STMT
} {SQLITE_ERROR}
do_test capi3c-11.5 {
  sqlite3_finalize $STMT
} {SQLITE_ERROR}
do_test capi3c-11.6 {
  catchsql {
    SELECT * FROM t1;
  }
} {0 {1 int 2 notatype}}
do_test capi3c-11.6.1 {
  sqlite3_get_autocommit $DB
} 0
do_test capi3c-11.7 {
  catchsql {
    COMMIT;
  }
} {0 {}}
do_test capi3c-11.7.1 {
  sqlite3_get_autocommit $DB
} 1
do_test capi3c-11.8 {
  execsql {
    CREATE TABLE t2(a);
    INSERT INTO t2 VALUES(1);
    INSERT INTO t2 VALUES(2);
    BEGIN;
    INSERT INTO t2 VALUES(3);
  }
} {}
do_test capi3c-11.8.1 {
  sqlite3_get_autocommit $DB
} 0
do_test capi3c-11.9 {
  set STMT [sqlite3_prepare_v2 $DB "SELECT a FROM t2" -1 TAIL]
  sqlite3_step $STMT
} {SQLITE_ROW}
do_test capi3c-11.9.1 {
  sqlite3_get_autocommit $DB
} 0
do_test capi3c-11.9.2 {
  catchsql {
    ROLLBACK;
  }
} {1 {cannot rollback transaction - SQL statements in progress}}
do_test capi3c-11.9.3 {
  sqlite3_get_autocommit $DB
} 0
do_test capi3c-11.10 {
  sqlite3_step $STMT
} {SQLITE_ROW}
do_test capi3c-11.11 {
  sqlite3_step $STMT
} {SQLITE_ROW}
do_test capi3c-11.12 {
  sqlite3_step $STMT
} {SQLITE_DONE}
do_test capi3c-11.13 {
  sqlite3_finalize $STMT
} {SQLITE_OK}
do_test capi3c-11.14 {
  execsql {
    SELECT a FROM t2;
  }
} {1 2 3}
do_test capi3c-11.14.1 {
  sqlite3_get_autocommit $DB
} 0
do_test capi3c-11.15 {
  catchsql {
    ROLLBACK;
  }
} {0 {}}
do_test capi3c-11.15.1 {
  sqlite3_get_autocommit $DB
} 1
do_test capi3c-11.16 {
  execsql {
    SELECT a FROM t2;
  }
} {1 2}

# Sanity check on the definition of 'outstanding VM'. This means any VM
# that has had sqlite3_step() called more recently than sqlite3_finalize() or
# sqlite3_reset(). So a VM that has just been prepared or reset does not
# count as an active VM.
do_test capi3c-11.17 {
  execsql {
    BEGIN;
  }
} {}
do_test capi3c-11.18 {
  set STMT [sqlite3_prepare_v2 $DB "SELECT a FROM t1" -1 TAIL]
  catchsql {
    COMMIT;
  }
} {0 {}}
do_test capi3c-11.19 {
  sqlite3_step $STMT
} {SQLITE_ROW}
do_test capi3c-11.20 {
  catchsql {
    BEGIN;
    COMMIT;
  }
} {1 {cannot commit transaction - SQL statements in progress}}
do_test capi3c-11.20 {
  sqlite3_reset $STMT
  catchsql {
    COMMIT;
  }
} {0 {}}
do_test capi3c-11.21 {
  sqlite3_finalize $STMT
} {SQLITE_OK}

# The following tests - capi3c-12.* - check that it's Ok to start a
# transaction while other VMs are active, and that it's Ok to execute
# atomic updates in the same situation 
#
do_test capi3c-12.1 {
  set STMT [sqlite3_prepare_v2 $DB "SELECT a FROM t2" -1 TAIL]
  sqlite3_step $STMT
} {SQLITE_ROW}
do_test capi3c-12.2 {
  catchsql {
    INSERT INTO t1 VALUES(3, NULL);
  }
} {0 {}}
do_test capi3c-12.3 {
  catchsql {
    INSERT INTO t2 VALUES(4);
  }
} {0 {}}
do_test capi3c-12.4 {
  catchsql {
    BEGIN;
    INSERT INTO t1 VALUES(4, NULL);
  }
} {0 {}}
do_test capi3c-12.5 {
  sqlite3_step $STMT
} {SQLITE_ROW}
do_test capi3c-12.5.1 {
  sqlite3_step $STMT
} {SQLITE_ROW}
do_test capi3c-12.6 {
  sqlite3_step $STMT
} {SQLITE_DONE}
do_test capi3c-12.7 {
  sqlite3_finalize $STMT
} {SQLITE_OK}
do_test capi3c-12.8 {
  execsql {
    COMMIT;
    SELECT a FROM t1;
  }
} {1 2 3 4}

# Test cases capi3c-13.* test the sqlite3_clear_bindings() and 
# sqlite3_sleep APIs.
#
if {[llength [info commands sqlite3_clear_bindings]]>0} {
  do_test capi3c-13.1 {
    execsql {
      DELETE FROM t1;
    }
    set STMT [sqlite3_prepare_v2 $DB "INSERT INTO t1 VALUES(?, ?)" -1 TAIL]
    sqlite3_step $STMT
  } {SQLITE_DONE}
  do_test capi3c-13.2 {
    sqlite3_reset $STMT
    sqlite3_bind_text $STMT 1 hello 5
    sqlite3_bind_text $STMT 2 world 5
    sqlite3_step $STMT
  } {SQLITE_DONE}
  do_test capi3c-13.3 {
    sqlite3_reset $STMT
    sqlite3_clear_bindings $STMT
    sqlite3_step $STMT
  } {SQLITE_DONE}
  do_test capi3c-13-4 {
    sqlite3_finalize $STMT
    execsql {
      SELECT * FROM t1;
    }
  } {{} {} hello world {} {}}
}
if {[llength [info commands sqlite3_sleep]]>0} {
  do_test capi3c-13-5 {
    set ms [sqlite3_sleep 80]
    expr {$ms==80 || $ms==1000}
  } {1}
}

# Ticket #1219:  Make sure binding APIs can handle a NULL pointer.
#
do_test capi3c-14.1 {
  set rc [catch {sqlite3_bind_text 0 1 hello 5} msg]
  lappend rc $msg
} {1 SQLITE_MISUSE}

# Ticket #1650:  Honor the nBytes parameter to sqlite3_prepare.
#
do_test capi3c-15.1 {
  set sql {SELECT * FROM t2}
  set nbytes [string length $sql]
  append sql { WHERE a==1}
  set STMT [sqlite3_prepare_v2 $DB $sql $nbytes TAIL]
  sqlite3_step $STMT
  sqlite3_column_int $STMT 0
} {1}
do_test capi3c-15.2 {
  sqlite3_step $STMT
  sqlite3_column_int $STMT 0
} {2}
do_test capi3c-15.3 {
  sqlite3_finalize $STMT
} {SQLITE_OK}

# Make sure code is always generated even if an IF EXISTS or 
# IF NOT EXISTS clause is present that the table does not or
# does exists.  That way we will always have a prepared statement
# to expire when the schema changes.
#
do_test capi3c-16.1 {
  set sql {DROP TABLE IF EXISTS t3}
  set STMT [sqlite3_prepare_v2 $DB $sql -1 TAIL]
  sqlite3_finalize $STMT
  expr {$STMT!=""}
} {1}
do_test capi3c-16.2 {
  set sql {CREATE TABLE IF NOT EXISTS t1(x,y)}
  set STMT [sqlite3_prepare_v2 $DB $sql -1 TAIL]
  sqlite3_finalize $STMT
  expr {$STMT!=""}
} {1}

# But still we do not generate code if there is no SQL
#
do_test capi3c-16.3 {
  set STMT [sqlite3_prepare_v2 $DB {} -1 TAIL]
  sqlite3_finalize $STMT
  expr {$STMT==""}
} {1}
do_test capi3c-16.4 {
  set STMT [sqlite3_prepare_v2 $DB {;} -1 TAIL]
  sqlite3_finalize $STMT
  expr {$STMT==""}
} {1}

# Ticket #2154.
#
do_test capi3c-17.1 {
  set STMT [sqlite3_prepare_v2 $DB {SELECT max(a) FROM t2} -1 TAIL]
  sqlite3_step $STMT
} SQLITE_ROW
do_test capi3c-17.2 {
  sqlite3_column_int $STMT 0
} 4
do_test capi3c-17.3 {
  sqlite3_step $STMT
} SQLITE_DONE
do_test capi3c-17.4 {
  sqlite3_reset $STMT
  db eval {CREATE INDEX i2 ON t2(a)}
  sqlite3_step $STMT
} SQLITE_ROW
do_test capi3c-17.5 {
  sqlite3_column_int $STMT 0
} 4
do_test capi3c-17.6 {
  sqlite3_step $STMT
} SQLITE_DONE
do_test capi3c-17.7 {
  sqlite3_reset $STMT
  db eval {DROP INDEX i2}
  sqlite3_step $STMT
} SQLITE_ROW
do_test capi3c-17.8 {
  sqlite3_column_int $STMT 0
} 4
do_test capi3c-17.9 {
  sqlite3_step $STMT
} SQLITE_DONE
do_test capi3c-17.10 {
  sqlite3_finalize $STMT
  set STMT [sqlite3_prepare_v2 $DB {SELECT b FROM t1 WHERE a=?} -1 TAIL]
  sqlite3_bind_int $STMT 1 2
  db eval {
    DELETE FROM t1;
    INSERT INTO t1 VALUES(1,'one');
    INSERT INTO t1 VALUES(2,'two');
    INSERT INTO t1 VALUES(3,'three');
    INSERT INTO t1 VALUES(4,'four');
  }
  sqlite3_step $STMT
} SQLITE_ROW
do_test capi3c-17.11 {
  sqlite3_column_text $STMT 0
} two
do_test capi3c-17.12 {
  sqlite3_step $STMT
} SQLITE_DONE
do_test capi3c-17.13 {
  sqlite3_reset $STMT
  db eval {CREATE INDEX i1 ON t1(a)}
  sqlite3_step $STMT
} SQLITE_ROW
do_test capi3c-17.14 {
  sqlite3_column_text $STMT 0
} two
do_test capi3c-17.15 {
  sqlite3_step $STMT
} SQLITE_DONE
do_test capi3c-17.16 {
  sqlite3_reset $STMT
  db eval {DROP INDEX i1}
  sqlite3_step $STMT
} SQLITE_ROW
do_test capi3c-17.17 {
  sqlite3_column_text $STMT 0
} two
do_test capi3c-17.18 {
  sqlite3_step $STMT
} SQLITE_DONE
do_test capi3c-17.99 {
  sqlite3_finalize $STMT
} SQLITE_OK


finish_test