# 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 1.37 2008/12/30 17:55:00 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}}

# This used to be SQLITE_MISUSE.  But now we automatically reset prepared
# statements.
ifcapable autoreset {
  do_test capi2-1.8 {
    sqlite3_step $VM
  } {SQLITE_ROW}
} else {
  do_test capi2-1.8 {
    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 {
  sqlite3_reset $VM
  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] \
       [sqlite3_extended_errcode $DB]
} {SQLITE_CONSTRAINT {UNIQUE constraint failed: t1.a} SQLITE_CONSTRAINT_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] \
       [sqlite3_extended_errcode $DB]
} {SQLITE_CONSTRAINT {NOT NULL constraint failed: t2.a} SQLITE_CONSTRAINT_NOTNULL}

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 {
  list [sqlite3_errcode $DB] [sqlite3_extended_errcode $DB]
} {SQLITE_CONSTRAINT SQLITE_CONSTRAINT_UNIQUE}

# 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 {UNIQUE constraint failed: t1.a}}
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 {
    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