test/fts4min.test - master - clang/sqlite

Optimization for "SELECT min(x) FROM tbl" where "x" is indexed and NOT NULL. This also allows similar queries on NOT NULL virtual table columns to be optimized.

27 фев 2020, 18:07

27 фев 2020, 18:0767e2bb9

# 2020 February 27
#
# 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
source $testdir/fts3_common.tcl
set ::testprefix fts4min

# If SQLITE_ENABLE_FTS3 is defined, omit this file.
ifcapable !fts3 {
  finish_test
  return
}

#------------------------------------------------------------------
do_execsql_test 0.0 {
  CREATE TABLE t1(a NOT NULL, b);
  CREATE INDEX i1 ON t1(a);
}

do_execsql_test 1.0 {
  CREATE VIRTUAL TABLE ft USING fts3(c);
  INSERT INTO ft(docid, c) VALUES(22, 'hello world');
  INSERT INTO ft(docid, c) VALUES(44, 'hello world');
  INSERT INTO ft(docid, c) VALUES(11, 'hello world');
}

do_eqp_test 1.1.1 {
  SELECT max(rowid) FROM ft
} {VIRTUAL TABLE INDEX 0:DESC}

do_eqp_test 1.1.2 {
  SELECT min(rowid) FROM ft
} {VIRTUAL TABLE INDEX 0:ASC}

do_execsql_test 1.2.1 {
  SELECT max(rowid) FROM ft
} {44}

do_execsql_test 1.2.2 {
  SELECT min(rowid) FROM ft
} {11}

finish_test