# 2003 January 29

 #

 # 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 testing the callback-free C/C++ API.

 #

 # $Id: capi2.test,v 1.36 2008/09/01 15:52:11 drh Exp $

 #

 set testdir [file dirname $argv0]

 source $testdir/tester.tcl

 # Return the text values from the current row pointed at by STMT as a list.

 proc get_row_values {STMT} {

   set VALUES [list]

   for {set i 0} {$i < [sqlite3_data_count $STMT]} {incr i} {

     lappend VALUES [sqlite3_column_text $STMT $i]

   }

   return $VALUES

 }

 # Return the column names followed by declaration types for the result set

 # of the SQL statement STMT.

 #

 # i.e. for:

 # CREATE TABLE abc(a text, b integer); 

 # SELECT * FROM abc;

 #

 # The result is {a b text integer}

 proc get_column_names {STMT} {

   set VALUES [list]

   for {set i 0} {$i < [sqlite3_column_count $STMT]} {incr i} {

     lappend VALUES [sqlite3_column_name $STMT $i]

   }

   for {set i 0} {$i < [sqlite3_column_count $STMT]} {incr i} {

     lappend VALUES [sqlite3_column_decltype $STMT $i]

   }

   return $VALUES

 }

 # Check basic functionality

 #

 do_test capi2-1.1 {

   set DB [sqlite3_connection_pointer db]

   execsql {CREATE TABLE t1(a,b,c)}

   set VM [sqlite3_prepare $DB {SELECT name, rowid FROM sqlite_master} -1 TAIL]

   set TAIL

 } {}

 do_test capi2-1.2 {

   sqlite3_step $VM

 } {SQLITE_ROW}

 do_test capi2-1.3 {

   sqlite3_data_count $VM

 } {2}

 do_test capi2-1.4 {

   get_row_values $VM

 } {t1 1}

 do_test capi2-1.5 {

   get_column_names $VM

 } {name rowid text INTEGER}

 do_test capi2-1.6 {

   sqlite3_step $VM 

 } {SQLITE_DONE}

 do_test capi2-1.7 {

   list [sqlite3_column_count $VM] [get_row_values $VM] [get_column_names $VM]

 } {2 {} {name rowid text INTEGER}}

 do_test capi2-1.8-misuse {

   sqlite3_step $VM

 } {SQLITE_MISUSE}

 # Update: In v2, once SQLITE_MISUSE is returned the statement handle cannot

 # be interrogated for more information. However in v3, since the column

 # count, names and types are determined at compile time, these are still

 # accessible after an SQLITE_MISUSE error.

 do_test capi2-1.9 {

   list [sqlite3_column_count $VM] [get_row_values $VM] [get_column_names $VM]

 } {2 {} {name rowid text INTEGER}}

 do_test capi2-1.10 {

   sqlite3_data_count $VM

 } {0}

 do_test capi2-1.11 {

   sqlite3_finalize $VM

 } {SQLITE_OK}

 # Check to make sure that the "tail" of a multi-statement SQL script

 # is returned by sqlite3_prepare.

 #

 do_test capi2-2.1 {

   set SQL {

     SELECT name, rowid FROM sqlite_master;

     SELECT name, rowid FROM sqlite_master WHERE 0;

     -- A comment at the end

   }

   set VM [sqlite3_prepare $DB $SQL -1 SQL]

   set SQL

 } {

     SELECT name, rowid FROM sqlite_master WHERE 0;

     -- A comment at the end

   }

 do_test capi2-2.2 {

   set r [sqlite3_step $VM]

   lappend r [sqlite3_column_count $VM] \

             [get_row_values $VM] \

             [get_column_names $VM]

 } {SQLITE_ROW 2 {t1 1} {name rowid text INTEGER}}

 do_test capi2-2.3 {

   set r [sqlite3_step $VM]

   lappend r [sqlite3_column_count $VM] \

             [get_row_values $VM] \

             [get_column_names $VM]

 } {SQLITE_DONE 2 {} {name rowid text INTEGER}}

 do_test capi2-2.4 {

   sqlite3_finalize $VM

 } {SQLITE_OK}

 do_test capi2-2.5 {

   set VM [sqlite3_prepare $DB $SQL -1 SQL]

   set SQL

 } {

     -- A comment at the end

   }

 do_test capi2-2.6 {

   set r [sqlite3_step $VM]

   lappend r [sqlite3_column_count $VM] \

             [get_row_values $VM] \

             [get_column_names $VM]

 } {SQLITE_DONE 2 {} {name rowid text INTEGER}}

 do_test capi2-2.7 {

   sqlite3_finalize $VM

 } {SQLITE_OK}

 do_test capi2-2.8 {

   set VM [sqlite3_prepare $DB $SQL -1 SQL]

   list $SQL $VM

 } {{} {}}

 # Check the error handling.

 #

 do_test capi2-3.1 {

   set rc [catch {

       sqlite3_prepare $DB {select bogus from sqlite_master} -1 TAIL

   } msg]

   lappend rc $msg $TAIL

 } {1 {(1) no such column: bogus} {}}

 do_test capi2-3.2 {

   set rc [catch {

       sqlite3_prepare $DB {select bogus from } -1 TAIL

   } msg]

   lappend rc $msg $TAIL

 } {1 {(1) near " ": syntax error} {}}

 do_test capi2-3.3 {

   set rc [catch {

       sqlite3_prepare $DB {;;;;select bogus from sqlite_master} -1 TAIL

   } msg]

   lappend rc $msg $TAIL

 } {1 {(1) no such column: bogus} {}}

 do_test capi2-3.4 {

   set rc [catch {

       sqlite3_prepare $DB {select bogus from sqlite_master;x;} -1 TAIL

   } msg]

   lappend rc $msg $TAIL

 } {1 {(1) no such column: bogus} {x;}}

 do_test capi2-3.5 {

   set rc [catch {

       sqlite3_prepare $DB {select bogus from sqlite_master;;;x;} -1 TAIL

   } msg]

   lappend rc $msg $TAIL

 } {1 {(1) no such column: bogus} {;;x;}}

 do_test capi2-3.6 {

   set rc [catch {

       sqlite3_prepare $DB {select 5/0} -1 TAIL

   } VM]

   lappend rc $TAIL

 } {0 {}}

 do_test capi2-3.7 {

   list [sqlite3_step $VM] \

        [sqlite3_column_count $VM] \

        [get_row_values $VM] \

        [get_column_names $VM]

 } {SQLITE_ROW 1 {{}} {5/0 {}}}

 do_test capi2-3.8 {

   sqlite3_finalize $VM

 } {SQLITE_OK}

 do_test capi2-3.9 {

   execsql {CREATE UNIQUE INDEX i1 ON t1(a)}

   set VM [sqlite3_prepare $DB {INSERT INTO t1 VALUES(1,2,3)} -1 TAIL]

   set TAIL

 } {}

 do_test capi2-3.9b {db changes} {0}

 do_test capi2-3.10 {

   list [sqlite3_step $VM] \

        [sqlite3_column_count $VM] \

        [get_row_values $VM] \

        [get_column_names $VM]

 } {SQLITE_DONE 0 {} {}}

 # Update for v3 - the change has not actually happened until the query is

 # finalized. Is this going to cause trouble for anyone? Lee Nelson maybe?

 # (Later:) The change now happens just before SQLITE_DONE is returned.

 do_test capi2-3.10b {db changes} {1}

 do_test capi2-3.11 {

   sqlite3_finalize $VM

 } {SQLITE_OK}

 do_test capi2-3.11b {db changes} {1}

 #do_test capi2-3.12-misuse {

 #  sqlite3_finalize $VM

 #} {SQLITE_MISUSE}

 do_test capi2-3.13 {

   set VM [sqlite3_prepare $DB {INSERT INTO t1 VALUES(1,3,4)} -1 TAIL]

   list [sqlite3_step $VM] \

        [sqlite3_column_count $VM] \

        [get_row_values $VM] \

        [get_column_names $VM]

 } {SQLITE_ERROR 0 {} {}}

 # Update for v3: Preparing a statement does not affect the change counter.

 # (Test result changes from 0 to 1).  (Later:) change counter updates occur

 # when sqlite3_step returns, not at finalize time.

 do_test capi2-3.13b {db changes} {0}

 do_test capi2-3.14 {

   list [sqlite3_finalize $VM] [sqlite3_errmsg $DB]

 } {SQLITE_CONSTRAINT {column a is not unique}}

 do_test capi2-3.15 {

   set VM [sqlite3_prepare $DB {CREATE TABLE t2(a NOT NULL, b)} -1 TAIL]

   set TAIL

 } {}

 do_test capi2-3.16 {

   list [sqlite3_step $VM] \

        [sqlite3_column_count $VM] \

        [get_row_values $VM] \

        [get_column_names $VM]

 } {SQLITE_DONE 0 {} {}}

 do_test capi2-3.17 {

   list [sqlite3_finalize $VM] [sqlite3_errmsg $DB]

 } {SQLITE_OK {not an error}}

 do_test capi2-3.18 {

   set VM [sqlite3_prepare $DB {INSERT INTO t2 VALUES(NULL,2)} -1 TAIL]

   list [sqlite3_step $VM] \

        [sqlite3_column_count $VM] \

        [get_row_values $VM] \

        [get_column_names $VM]

 } {SQLITE_ERROR 0 {} {}}

 do_test capi2-3.19 {

   list [sqlite3_finalize $VM] [sqlite3_errmsg $DB]

 } {SQLITE_CONSTRAINT {t2.a may not be NULL}}

 do_test capi2-3.20 {

   execsql {

     CREATE TABLE a1(message_id, name , UNIQUE(message_id, name) );

     INSERT INTO a1 VALUES(1, 1);

   }

 } {}

 do_test capi2-3.21 {

   set VM [sqlite3_prepare $DB {INSERT INTO a1 VALUES(1, 1)} -1 TAIL]

   sqlite3_step $VM

 } {SQLITE_ERROR}

 do_test capi2-3.22 {

   sqlite3_errcode $DB

 } {SQLITE_ERROR}

 do_test capi2-3.23 {

   sqlite3_finalize $VM

 } {SQLITE_CONSTRAINT}

 do_test capi2-3.24 {

   sqlite3_errcode $DB

 } {SQLITE_CONSTRAINT}

 # Two or more virtual machines exists at the same time.

 #

 do_test capi2-4.1 {

   set VM1 [sqlite3_prepare $DB {INSERT INTO t2 VALUES(1,2)} -1 TAIL]

   set TAIL

 } {}

 do_test capi2-4.2 {

   set VM2 [sqlite3_prepare $DB {INSERT INTO t2 VALUES(2,3)} -1 TAIL]

   set TAIL

 } {}

 do_test capi2-4.3 {

   set VM3 [sqlite3_prepare $DB {INSERT INTO t2 VALUES(3,4)} -1 TAIL]

   set TAIL

 } {}

 do_test capi2-4.4 {

   list [sqlite3_step $VM2] \

        [sqlite3_column_count $VM2] \

        [get_row_values $VM2] \

        [get_column_names $VM2]

 } {SQLITE_DONE 0 {} {}}

 do_test capi2-4.5 {

   execsql {SELECT * FROM t2 ORDER BY a}

 } {2 3}

 do_test capi2-4.6 {

   sqlite3_finalize $VM2

 } {SQLITE_OK}

 do_test capi2-4.7 {

   list [sqlite3_step $VM3] \

        [sqlite3_column_count $VM3] \

        [get_row_values $VM3] \

        [get_column_names $VM3]

 } {SQLITE_DONE 0 {} {}}

 do_test capi2-4.8 {

   execsql {SELECT * FROM t2 ORDER BY a}

 } {2 3 3 4}

 do_test capi2-4.9 {

   sqlite3_finalize $VM3

 } {SQLITE_OK}

 do_test capi2-4.10 {

   list [sqlite3_step $VM1] \

        [sqlite3_column_count $VM1] \

        [get_row_values $VM1] \

        [get_column_names $VM1]

 } {SQLITE_DONE 0 {} {}}

 do_test capi2-4.11 {

   execsql {SELECT * FROM t2 ORDER BY a}

 } {1 2 2 3 3 4}

 do_test capi2-4.12 {

   sqlite3_finalize $VM1

 } {SQLITE_OK}

 # Interleaved SELECTs

 #

 do_test capi2-5.1 {

   set VM1 [sqlite3_prepare $DB {SELECT * FROM t2} -1 TAIL]

   set VM2 [sqlite3_prepare $DB {SELECT * FROM t2} -1 TAIL]

   set VM3 [sqlite3_prepare $DB {SELECT * FROM t2} -1 TAIL]

   list [sqlite3_step $VM1] \

        [sqlite3_column_count $VM1] \

        [get_row_values $VM1] \

        [get_column_names $VM1]

 } {SQLITE_ROW 2 {2 3} {a b {} {}}}

 do_test capi2-5.2 {

   list [sqlite3_step $VM2] \

        [sqlite3_column_count $VM2] \

        [get_row_values $VM2] \

        [get_column_names $VM2]

 } {SQLITE_ROW 2 {2 3} {a b {} {}}}

 do_test capi2-5.3 {

   list [sqlite3_step $VM1] \

        [sqlite3_column_count $VM1] \

        [get_row_values $VM1] \

        [get_column_names $VM1]

 } {SQLITE_ROW 2 {3 4} {a b {} {}}}

 do_test capi2-5.4 {

   list [sqlite3_step $VM3] \

        [sqlite3_column_count $VM3] \

        [get_row_values $VM3] \

        [get_column_names $VM3]

 } {SQLITE_ROW 2 {2 3} {a b {} {}}}

 do_test capi2-5.5 {

   list [sqlite3_step $VM3] \

        [sqlite3_column_count $VM3] \

        [get_row_values $VM3] \

        [get_column_names $VM3]

 } {SQLITE_ROW 2 {3 4} {a b {} {}}}

 do_test capi2-5.6 {

   list [sqlite3_step $VM3] \

        [sqlite3_column_count $VM3] \

        [get_row_values $VM3] \

        [get_column_names $VM3]

 } {SQLITE_ROW 2 {1 2} {a b {} {}}}

 do_test capi2-5.7 {

   list [sqlite3_step $VM3] \

        [sqlite3_column_count $VM3] \

        [get_row_values $VM3] \

        [get_column_names $VM3]

 } {SQLITE_DONE 2 {} {a b {} {}}}

 do_test capi2-5.8 {

   sqlite3_finalize $VM3

 } {SQLITE_OK}

 do_test capi2-5.9 {

   list [sqlite3_step $VM1] \

        [sqlite3_column_count $VM1] \

        [get_row_values $VM1] \

        [get_column_names $VM1]

 } {SQLITE_ROW 2 {1 2} {a b {} {}}}

 do_test capi2-5.10 {

   sqlite3_finalize $VM1

 } {SQLITE_OK}

 do_test capi2-5.11 {

   list [sqlite3_step $VM2] \

        [sqlite3_column_count $VM2] \

        [get_row_values $VM2] \

        [get_column_names $VM2]

 } {SQLITE_ROW 2 {3 4} {a b {} {}}}

 do_test capi2-5.12 {

   list [sqlite3_step $VM2] \

        [sqlite3_column_count $VM2] \

        [get_row_values $VM2] \

        [get_column_names $VM2]

 } {SQLITE_ROW 2 {1 2} {a b {} {}}}

 do_test capi2-5.11 {

   sqlite3_finalize $VM2

 } {SQLITE_OK}

 # Check for proper SQLITE_BUSY returns.

 #

 do_test capi2-6.1 {

   execsql {

     BEGIN;

     CREATE TABLE t3(x counter);

     INSERT INTO t3 VALUES(1);

     INSERT INTO t3 VALUES(2);

     INSERT INTO t3 SELECT x+2 FROM t3;

     INSERT INTO t3 SELECT x+4 FROM t3;

     INSERT INTO t3 SELECT x+8 FROM t3;

     COMMIT;

   }

   set VM1 [sqlite3_prepare $DB {SELECT * FROM t3} -1 TAIL]

   sqlite3 db2 test.db

   execsql {BEGIN} db2

 } {}

 # Update for v3: BEGIN doesn't write-lock the database. It is quite

 # difficult to get v3 to write-lock the database, which causes a few

 # problems for test scripts.

 #

 # do_test capi2-6.2 {

 #   list [sqlite3_step $VM1] \

 #        [sqlite3_column_count $VM1] \

 #        [get_row_values $VM1] \

 #        [get_column_names $VM1]

 # } {SQLITE_BUSY 0 {} {}}

 do_test capi2-6.3 {

   execsql {COMMIT} db2

 } {}

 do_test capi2-6.4 {

   list [sqlite3_step $VM1] \

        [sqlite3_column_count $VM1] \

        [get_row_values $VM1] \

        [get_column_names $VM1]

 } {SQLITE_ROW 1 1 {x counter}}

 do_test capi2-6.5 {

   catchsql {INSERT INTO t3 VALUES(10);} db2

 } {1 {database is locked}}

 do_test capi2-6.6 {

   list [sqlite3_step $VM1] \

        [sqlite3_column_count $VM1] \

        [get_row_values $VM1] \

        [get_column_names $VM1]

 } {SQLITE_ROW 1 2 {x counter}}

 do_test capi2-6.7 {

   execsql {SELECT * FROM t2} db2

 } {2 3 3 4 1 2}

 do_test capi2-6.8 {

   list [sqlite3_step $VM1] \

        [sqlite3_column_count $VM1] \

        [get_row_values $VM1] \

        [get_column_names $VM1]

 } {SQLITE_ROW 1 3 {x counter}}

 do_test capi2-6.9 {

   execsql {SELECT * FROM t2} 

 } {2 3 3 4 1 2}

 do_test capi2-6.10 {

   list [sqlite3_step $VM1] \

        [sqlite3_column_count $VM1] \

        [get_row_values $VM1] \

        [get_column_names $VM1]

 } {SQLITE_ROW 1 4 {x counter}}

 do_test capi2-6.11 {

   execsql {BEGIN}

 } {}

 do_test capi2-6.12 {

   list [sqlite3_step $VM1] \

        [sqlite3_column_count $VM1] \

        [get_row_values $VM1] \

        [get_column_names $VM1]

 } {SQLITE_ROW 1 5 {x counter}}

 # A read no longer blocks a write in the same connection.

 #do_test capi2-6.13 {

 #  catchsql {UPDATE t3 SET x=x+1}

 #} {1 {database table is locked}}

 do_test capi2-6.14 {

   list [sqlite3_step $VM1] \

        [sqlite3_column_count $VM1] \

        [get_row_values $VM1] \

        [get_column_names $VM1]

 } {SQLITE_ROW 1 6 {x counter}}

 do_test capi2-6.15 {

   execsql {SELECT * FROM t1}

 } {1 2 3}

 do_test capi2-6.16 {

   list [sqlite3_step $VM1] \

        [sqlite3_column_count $VM1] \

        [get_row_values $VM1] \

        [get_column_names $VM1]

 } {SQLITE_ROW 1 7 {x counter}}

 do_test capi2-6.17 {

   catchsql {UPDATE t1 SET b=b+1}

 } {0 {}}

 do_test capi2-6.18 {

   list [sqlite3_step $VM1] \

        [sqlite3_column_count $VM1] \

        [get_row_values $VM1] \

        [get_column_names $VM1]

 } {SQLITE_ROW 1 8 {x counter}}

 do_test capi2-6.19 {

   execsql {SELECT * FROM t1}

 } {1 3 3}

 do_test capi2-6.20 {

   list [sqlite3_step $VM1] \

        [sqlite3_column_count $VM1] \

        [get_row_values $VM1] \

        [get_column_names $VM1]

 } {SQLITE_ROW 1 9 {x counter}}

 #do_test capi2-6.21 {

 #  execsql {ROLLBACK; SELECT * FROM t1}

 #} {1 2 3}

 do_test capi2-6.22 {

   list [sqlite3_step $VM1] \

        [sqlite3_column_count $VM1] \

        [get_row_values $VM1] \

        [get_column_names $VM1]

 } {SQLITE_ROW 1 10 {x counter}}

 #do_test capi2-6.23 {

 #  execsql {BEGIN TRANSACTION;}

 #} {}

 do_test capi2-6.24 {

   list [sqlite3_step $VM1] \

        [sqlite3_column_count $VM1] \

        [get_row_values $VM1] \

        [get_column_names $VM1]

 } {SQLITE_ROW 1 11 {x counter}}

 do_test capi2-6.25 {

   execsql {

     INSERT INTO t1 VALUES(2,3,4);

     SELECT * FROM t1;

   }

 } {1 3 3 2 3 4}

 do_test capi2-6.26 {

   list [sqlite3_step $VM1] \

        [sqlite3_column_count $VM1] \

        [get_row_values $VM1] \

        [get_column_names $VM1]

 } {SQLITE_ROW 1 12 {x counter}}

 do_test capi2-6.27 {

   catchsql {

     INSERT INTO t1 VALUES(2,4,5);

     SELECT * FROM t1;

   }

 } {1 {column a is not unique}}

 do_test capi2-6.28 {

   list [sqlite3_step $VM1] \

        [sqlite3_column_count $VM1] \

        [get_row_values $VM1] \

        [get_column_names $VM1]

 } {SQLITE_ROW 1 13 {x counter}}

 do_test capi2-6.99 {

   sqlite3_finalize $VM1

 } {SQLITE_OK}

 catchsql {ROLLBACK}

 do_test capi2-7.1 {

   stepsql $DB {

     SELECT * FROM t1

   }

 } {0 1 2 3}

 do_test capi2-7.2 {

   stepsql $DB {

     PRAGMA count_changes=on

   }

 } {0}

 do_test capi2-7.3 {

   stepsql $DB {

     UPDATE t1 SET a=a+10;

   }

 } {0 1}

 do_test capi2-7.4 {

   stepsql $DB {

     INSERT INTO t1 SELECT a+1,b+1,c+1 FROM t1;

   }

 } {0 1}

 do_test capi2-7.4b {sqlite3_changes $DB} {1}

 do_test capi2-7.5 {

   stepsql $DB {

     UPDATE t1 SET a=a+10;

   }

 } {0 2}

 do_test capi2-7.5b {sqlite3_changes $DB} {2}

 do_test capi2-7.6 {

   stepsql $DB {

     SELECT * FROM t1;

   }

 } {0 21 2 3 22 3 4}

 do_test capi2-7.7 {

   stepsql $DB {

     INSERT INTO t1 SELECT a+2,b+2,c+2 FROM t1;

   }

 } {0 2}

 do_test capi2-7.8 {

   sqlite3_changes $DB

 } {2}

 do_test capi2-7.9 {

   stepsql $DB {

     SELECT * FROM t1;

   }

 } {0 21 2 3 22 3 4 23 4 5 24 5 6}

 do_test capi2-7.10 {

   stepsql $DB {

     UPDATE t1 SET a=a-20;

     SELECT * FROM t1;

   }

 } {0 4 1 2 3 2 3 4 3 4 5 4 5 6}

 # Update for version 3: A SELECT statement no longer resets the change

 # counter (Test result changes from 0 to 4).

 do_test capi2-7.11 {

   sqlite3_changes $DB

 } {4}

 do_test capi2-7.11a {

   execsql {SELECT count(*) FROM t1}

 } {4}

 ifcapable {explain} {

   do_test capi2-7.12 {

     set x [stepsql $DB {EXPLAIN SELECT * FROM t1}]

     lindex $x 0

   } {0}

 }

 # Ticket #261 - make sure we can finalize before the end of a query.

 #

 do_test capi2-8.1 {

   set VM1 [sqlite3_prepare $DB {SELECT * FROM t2} -1 TAIL]

   sqlite3_finalize $VM1

 } {SQLITE_OK}

 # Tickets #384 and #385 - make sure the TAIL argument to sqlite3_prepare

 # and all of the return pointers in sqlite_step can be null.

 #

 do_test capi2-9.1 {

   set VM1 [sqlite3_prepare $DB {SELECT * FROM t2} -1 DUMMY]

   sqlite3_step $VM1

   sqlite3_finalize $VM1

 } {SQLITE_OK}

 # Test that passing a NULL pointer to sqlite3_finalize() or sqlite3_reset

 # does not cause an error.

 do_test capi2-10.1 {

   sqlite3_finalize 0

 } {SQLITE_OK}

 do_test capi2-10.2 {

   sqlite3_reset 0

 } {SQLITE_OK}

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

 # The following tests - capi2-11.* - test the "column origin" APIs.

 #

 #   sqlite3_column_origin_name()

 #   sqlite3_column_database_name()

 #   sqlite3_column_table_name()

 #

 ifcapable columnmetadata {

 # This proc uses the database handle $::DB to compile the SQL statement passed

 # as a parameter. The return value of this procedure is a list with one

 # element for each column returned by the compiled statement. Each element of

 # this list is itself a list of length three, consisting of the origin

 # database, table and column for the corresponding returned column.

 proc check_origins {sql} {

   set ret [list]

   set ::STMT [sqlite3_prepare $::DB $sql -1 dummy]

   for {set i 0} {$i < [sqlite3_column_count $::STMT]} {incr i} {

     lappend ret [list                           \

       [sqlite3_column_database_name $::STMT $i] \

       [sqlite3_column_table_name $::STMT $i]    \

       [sqlite3_column_origin_name $::STMT $i]   \

     ]

   }

   sqlite3_finalize $::STMT

   return $ret

 }

 do_test capi2-11.1 {

   execsql {

     CREATE TABLE tab1(col1, col2);

   }

 } {}

 do_test capi2-11.2 {

   check_origins {SELECT col2, col1 FROM tab1}

 } [list {main tab1 col2} {main tab1 col1}]

 do_test capi2-11.3 {

   check_origins {SELECT col2 AS hello, col1 AS world FROM tab1}

 } [list {main tab1 col2} {main tab1 col1}]

 ifcapable subquery {

   do_test capi2-11.4 {

     check_origins {SELECT b, a FROM (SELECT col1 AS a, col2 AS b FROM tab1)}

   } [list {main tab1 col2} {main tab1 col1}]

   do_test capi2-11.5 {

     check_origins {SELECT (SELECT col2 FROM tab1), (SELECT col1 FROM tab1)}

   } [list {main tab1 col2} {main tab1 col1}]

   do_test capi2-11.6 {

     check_origins {SELECT (SELECT col2), (SELECT col1) FROM tab1}

   } [list {main tab1 col2} {main tab1 col1}]

   do_test capi2-11.7 {

     check_origins {SELECT * FROM tab1}

   } [list {main tab1 col1} {main tab1 col2}]

   do_test capi2-11.8 {

     check_origins {SELECT * FROM (SELECT * FROM tab1)}

   } [list {main tab1 col1} {main tab1 col2}]

 }

 ifcapable view&&subquery {

   do_test capi2-12.1 {

     execsql {

       CREATE VIEW view1 AS SELECT * FROM  tab1;

     }

   } {}

   do_test capi2-12.2 {

     check_origins {SELECT col2, col1 FROM view1}

   } [list {main tab1 col2} {main tab1 col1}]

   do_test capi2-12.3 {

     check_origins {SELECT col2 AS hello, col1 AS world FROM view1}

   } [list {main tab1 col2} {main tab1 col1}]

   do_test capi2-12.4 {

     check_origins {SELECT b, a FROM (SELECT col1 AS a, col2 AS b FROM view1)}

   } [list {main tab1 col2} {main tab1 col1}]

   do_test capi2-12.5 {

 breakpoint

     check_origins {SELECT (SELECT col2 FROM view1), (SELECT col1 FROM view1)}

   } [list {main tab1 col2} {main tab1 col1}]

   do_test capi2-12.6 {

     check_origins {SELECT (SELECT col2), (SELECT col1) FROM view1}

   } [list {main tab1 col2} {main tab1 col1}]

   do_test capi2-12.7 {

     check_origins {SELECT * FROM view1}

   } [list {main tab1 col1} {main tab1 col2}]

   do_test capi2-12.8 {

     check_origins {select * from (select * from view1)}

   } [list {main tab1 col1} {main tab1 col2}]

   do_test capi2-12.9 {

     check_origins {select * from (select * from (select * from view1))}

   } [list {main tab1 col1} {main tab1 col2}]

   do_test capi2-12.10 {

     db close

     sqlite3 db test.db

     set ::DB [sqlite3_connection_pointer db]

     check_origins {select * from (select * from (select * from view1))}

   } [list {main tab1 col1} {main tab1 col2}]

   # This view will thwart the flattening optimization.

   do_test capi2-13.1 {

     execsql {

       CREATE VIEW view2 AS SELECT * FROM tab1 limit 10 offset 10;

     }

   } {}

   do_test capi2-13.2 {

     check_origins {SELECT col2, col1 FROM view2}

   } [list {main tab1 col2} {main tab1 col1}]

   do_test capi2-13.3 {

     check_origins {SELECT col2 AS hello, col1 AS world FROM view2}

   } [list {main tab1 col2} {main tab1 col1}]

   do_test capi2-13.4 {

     check_origins {SELECT b, a FROM (SELECT col1 AS a, col2 AS b FROM view2)}

   } [list {main tab1 col2} {main tab1 col1}]

   do_test capi2-13.5 {

     check_origins {SELECT (SELECT col2 FROM view2), (SELECT col1 FROM view2)}

   } [list {main tab1 col2} {main tab1 col1}]

   do_test capi2-13.6 {

     check_origins {SELECT (SELECT col2), (SELECT col1) FROM view2}

   } [list {main tab1 col2} {main tab1 col1}]

   do_test capi2-13.7 {

     check_origins {SELECT * FROM view2}

   } [list {main tab1 col1} {main tab1 col2}]

   do_test capi2-13.8 {

     check_origins {select * from (select * from view2)}

   } [list {main tab1 col1} {main tab1 col2}]

   do_test capi2-13.9 {

     check_origins {select * from (select * from (select * from view2))}

   } [list {main tab1 col1} {main tab1 col2}]

   do_test capi2-13.10 {

     db close

     sqlite3 db test.db

     set ::DB [sqlite3_connection_pointer db]

     check_origins {select * from (select * from (select * from view2))}

   } [list {main tab1 col1} {main tab1 col2}]

   do_test capi2-13.11 {

     check_origins {select * from (select * from tab1 limit 10 offset 10)}

   } [list {main tab1 col1} {main tab1 col2}]

 }

 } ;# ifcapable columnmetadata

 db2 close

 finish_test