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# 2023-10-26
#
# 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 bestindexB
ifcapable !vtab {
finish_test
return
}
register_tcl_module db
proc vtab_command {method args} {
switch -- $method {
xConnect {
return "CREATE TABLE t1(a, b, c)"
}
xBestIndex {
set hdl [lindex $args 0]
set clist [$hdl constraints]
set orderby [$hdl orderby]
if {[info exists ::xbestindex_sql]} {
explain_i $::xbestindex_sql
set ::xbestindex_res [ execsql $::xbestindex_sql ]
}
return "cost 1000000 rows 1000000 idxnum 0 idxstr hello"
}
xFilter {
return "sql {SELECT 0, 1, 2, 3}"
}
}
return {}
}
do_execsql_test 1.0 {
CREATE VIRTUAL TABLE x1 USING tcl(vtab_command);
CREATE TABLE y1(a, b);
CREATE TABLE y2(a, b);
} {}
do_execsql_test 1.1 {
SELECT * FROM x1
} {1 2 3}
do_execsql_test 1.2 {
INSERT INTO y1 VALUES(1, 2) RETURNING rowid;
} {1}
do_execsql_test 1.3 {
CREATE TRIGGER y1tr BEFORE INSERT ON y1 BEGIN
SELECT * FROM x1;
END;
INSERT INTO y1 VALUES(3, 4) RETURNING rowid;
} {2}
# This time, rig the xBestIndex() method of the vtab to invoke an SQL
# statement that uses RETURNING.
set ::xbestindex_sql {
INSERT INTO y2 VALUES(NULL, NULL) RETURNING rowid;
}
do_execsql_test 1.4 {
INSERT INTO y1 VALUES(5, 6) RETURNING rowid;
} {3}
do_test 1.5 {
set ::xbestindex_res
} {1}
finish_test
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