sqlite/test/analyzeG.test

# 2018-07-04
#
# 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 analyzeG

ifcapable {!stat4} {
  finish_test
  return
}

do_execsql_test 1.0 {
  CREATE TABLE t1(a, b, c, d);
  CREATE INDEX t1abc ON t1(a, b, c);
  WITH s(i) AS (
    SELECT 1 UNION ALL SELECT i+1 FROM s WHERE i<100000
  )
  INSERT INTO t1 SELECT 1,1,1,1 FROM s;

  WITH s(i) AS (
    SELECT 1 UNION ALL SELECT i+1 FROM s WHERE i<1000
  )
  INSERT INTO t1 SELECT i%5,i,i,i FROM s;
}

do_execsql_test 1.1 {
  EXPLAIN QUERY PLAN SELECT * FROM t1 WHERE a=1 AND b=1 AND c>0
} {
  3 0 0 {SEARCH TABLE t1 USING INDEX t1abc (a=? AND b=? AND c>?)}
}

do_execsql_test 1.3 { 
  ANALYZE 
} {}

do_execsql_test 1.4 {
  EXPLAIN QUERY PLAN SELECT * FROM t1 WHERE a=1 AND b=1 AND c>0
} {
  2 0 0 {SCAN TABLE t1}
}



finish_test