# 2017 September 10 # # 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. # #*********************************************************************** # Test the virtual table interface. In particular the xBestIndex # method. # set testdir [file dirname $argv0] source $testdir/tester.tcl set testprefix bestindex4 ifcapable !vtab { finish_test return } #------------------------------------------------------------------------- # Virtual table callback for a virtual table named $tbl. # proc vtab_cmd {method args} { set binops(ne) != set binops(eq) = set binops(isnot) "IS NOT" set binops(is) "IS" set unops(isnotnull) "IS NOT NULL" set unops(isnull) "IS NULL" set cols(0) a set cols(1) b set cols(2) c switch -- $method { xConnect { return "CREATE TABLE t1(a, b, c)" } xBestIndex { foreach {clist orderby mask} $args {} set cost 1000000.0 set ret [list] set str [list] set v 0 for {set i 0} {$i < [llength $clist]} {incr i} { array unset C array set C [lindex $clist $i] if {$C(usable)} { if {[info exists binops($C(op))]} { lappend ret omit $i lappend str "$cols($C(column)) $binops($C(op)) %$v%" incr v set cost [expr $cost / 2] } if {[info exists unops($C(op))]} { lappend ret omit $i lappend str "$cols($C(column)) $unops($C(op))" incr v set cost [expr $cost / 2] } } } lappend ret idxstr [join $str " AND "] lappend ret cost $cost return $ret } xFilter { set q [lindex $args 1] set a [lindex $args 2] for {set v 0} {$v < [llength $a]} {incr v} { set val [lindex $a $v] set q [string map [list %$v% '$val'] $q] } if {$q==""} { set q 1 } lappend ::xFilterQueries "WHERE $q" return [list sql "SELECT rowid, * FROM t1x WHERE $q"] } } return "" } proc vtab_simple {method args} { switch -- $method { xConnect { return "CREATE TABLE t2(x)" } xBestIndex { return [list cost 999999.0] } xFilter { return [list sql "SELECT rowid, * FROM t2x"] } } return "" } register_tcl_module db proc do_vtab_query_test {tn query result} { set ::xFilterQueries [list] uplevel [list do_test $tn [string map [list %QUERY% $query] { set r [execsql {%QUERY%}] set r [concat $::xFilterQueries $r] set r }] [list {*}$result] ] } do_execsql_test 1.0 { CREATE VIRTUAL TABLE t1 USING tcl('vtab_cmd'); CREATE TABLE t1x(a INTEGER, b TEXT, c REAL); INSERT INTO t1x VALUES(1, 2, 3); INSERT INTO t1x VALUES(4, 5, 6); INSERT INTO t1x VALUES(7, 8, 9); CREATE VIRTUAL TABLE t2 USING tcl('vtab_simple'); CREATE TABLE t2x(x INTEGER); INSERT INTO t2x VALUES(1); } do_vtab_query_test 1.1 { SELECT * FROM t1 WHERE a!='hello'; } { "WHERE a != 'hello'" 1 2 3.0 4 5 6.0 7 8 9.0 } do_vtab_query_test 1.2.1 { SELECT * FROM t1 WHERE b!=8 } { "WHERE b != '8'" 1 2 3.0 4 5 6.0 } do_vtab_query_test 1.2.2 { SELECT * FROM t1 WHERE 8!=b } { "WHERE b != '8'" 1 2 3.0 4 5 6.0 } do_vtab_query_test 1.3 { SELECT * FROM t1 WHERE c IS NOT 3 } { "WHERE c IS NOT '3'" 4 5 6.0 7 8 9.0 } do_vtab_query_test 1.3.2 { SELECT * FROM t1 WHERE 3 IS NOT c } { "WHERE c IS NOT '3'" 4 5 6.0 7 8 9.0 } do_vtab_query_test 1.4.1 { SELECT * FROM t1, t2 WHERE x != a } { "WHERE a != '1'" 4 5 6.0 1 7 8 9.0 1 } do_vtab_query_test 1.4.2 { SELECT * FROM t1, t2 WHERE a != x } { "WHERE a != '1'" 4 5 6.0 1 7 8 9.0 1 } do_vtab_query_test 1.5.1 { SELECT * FROM t1 WHERE a IS NOT NULL } { "WHERE a IS NOT NULL" 1 2 3.0 4 5 6.0 7 8 9.0 } do_vtab_query_test 1.5.2 { SELECT * FROM t1 WHERE NULL IS NOT a } { "WHERE a IS NOT ''" 1 2 3.0 4 5 6.0 7 8 9.0 } do_vtab_query_test 1.6.1 { SELECT * FROM t1 WHERE a IS NULL } { "WHERE a IS NULL" } do_vtab_query_test 1.6.2 { SELECT * FROM t1 WHERE NULL IS a } { "WHERE a IS ''" } do_vtab_query_test 1.7.1 { SELECT * FROM t1 WHERE (a, b) IS (1, 2) } { "WHERE a IS '1' AND b IS '2'" 1 2 3.0 } do_vtab_query_test 1.7.2 { SELECT * FROM t1 WHERE (5, 4) IS (b, a) } { {WHERE b IS '5' AND a IS '4'} 4 5 6.0 } #--------------------------------------------------------------------- do_execsql_test 2.0.0 { DELETE FROM t1x; INSERT INTO t1x VALUES('a', 'b', 'c'); } do_execsql_test 2.0.1 { SELECT * FROM t1 } {a b c} do_execsql_test 2.0.2 { SELECT * FROM t1 WHERE (a, b) != ('a', 'b'); } {} do_execsql_test 2.1.0 { DELETE FROM t1x; INSERT INTO t1x VALUES(7, 8, 9); } do_execsql_test 2.1.1 { SELECT * FROM t1 } {7 8 9.0} do_execsql_test 2.1.2 { SELECT * FROM t1 WHERE (a, b) != (7, '8') } {} do_execsql_test 2.1.3 { SELECT * FROM t1 WHERE a!=7 OR b!='8' } do_execsql_test 2.1.4 { SELECT * FROM t1 WHERE a!=7 OR b!='8' } do_execsql_test 2.2.1 { CREATE TABLE t3(a INTEGER, b TEXT); INSERT INTO t3 VALUES(45, 46); } do_execsql_test 2.2.2 { SELECT * FROM t3 WHERE (a, b) != (45, 46); } do_execsql_test 2.2.3 { SELECT * FROM t3 WHERE (a, b) != ('45', '46'); } do_execsql_test 2.2.4 { SELECT * FROM t3 WHERE (a, b) == (45, 46); } {45 46} do_execsql_test 2.2.5 { SELECT * FROM t3 WHERE (a, b) == ('45', '46'); } {45 46} #--------------------------------------------------------------------- # Test the != operator on a virtual table with column affinities. # proc vtab_simple_integer {method args} { switch -- $method { xConnect { return "CREATE TABLE t4(x INTEGER)" } xBestIndex { return [list cost 999999.0] } xFilter { return [list sql "SELECT rowid, * FROM t4x"] } } return "" } do_execsql_test 3.0 { CREATE TABLE t4x(a INTEGER); INSERT INTO t4x VALUES(245); CREATE VIRTUAL TABLE t4 USING tcl('vtab_simple_integer'); } do_execsql_test 3.1 { SELECT rowid, * FROM t4 WHERE x=245; } {1 245} do_execsql_test 3.2 { SELECT rowid, * FROM t4 WHERE x='245'; } {1 245} do_execsql_test 3.3 { SELECT rowid, * FROM t4 WHERE x!=245; } {} do_execsql_test 3.4 { SELECT rowid, * FROM t4 WHERE x!='245'; } {} do_execsql_test 3.5 { SELECT rowid, * FROM t4 WHERE rowid!=1 OR x!='245'; } {} finish_test