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Add the experimental sqlite3_stmt_scanstatus() API.

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FossilOrigin-Name: 6a9bab34aeb6a01b612211a28c140de60a3e883c
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dan
2014-10-31 20:11:32 +00:00
parent 0fb5daed34
commit 04489b6dce
12 changed files with 394 additions and 31 deletions
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test/scanstatus.test Normal file
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# 2014 November 1
#
# 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.
#
#***********************************************************************
#
set testdir [file dirname $argv0]
source $testdir/tester.tcl
set testprefix scanstatus
do_execsql_test 1.0 {
CREATE TABLE t1(a, b);
CREATE TABLE t2(x, y);
INSERT INTO t1 VALUES(1, 2);
INSERT INTO t1 VALUES(3, 4);
INSERT INTO t2 VALUES('a', 'b');
INSERT INTO t2 VALUES('c', 'd');
INSERT INTO t2 VALUES('e', 'f');
}
proc do_scanstatus_test {tn res} {
set stmt [db_last_stmt_ptr db]
set idx 0
set ret [list]
while {1} {
set r [sqlite3_stmt_scanstatus $stmt $idx]
if {[llength $r]==0} break
lappend ret {*}$r
incr idx
}
uplevel [list do_test $tn [list set {} $ret] [list {*}$res]]
}
do_execsql_test 1.1 { SELECT count(*) FROM t1, t2; } 6
do_scanstatus_test 1.2 {
nLoop 1 nVisit 2 nEst 1048576 zName t1 zExplain {SCAN TABLE t1}
nLoop 2 nVisit 6 nEst 1048576 zName t2 zExplain {SCAN TABLE t2}
}
do_execsql_test 1.3 {
ANALYZE;
SELECT count(*) FROM t1, t2;
} 6
do_scanstatus_test 1.4 {
nLoop 1 nVisit 2 nEst 2 zName t1 zExplain {SCAN TABLE t1}
nLoop 2 nVisit 6 nEst 3 zName t2 zExplain {SCAN TABLE t2}
}
do_execsql_test 1.5 {
ANALYZE;
SELECT count(*) FROM t1, t2 WHERE t2.rowid>1;
} 4
do_scanstatus_test 1.6 {
nLoop 1 nVisit 2 nEst 2 zName t2 zExplain
{SEARCH TABLE t2 USING INTEGER PRIMARY KEY (rowid>?)}
nLoop 2 nVisit 4 nEst 2 zName t1 zExplain {SCAN TABLE t1}
}
finish_test