# 2015-08-19
#
# 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.
#
#***********************************************************************
# 
# This file implements tests for table-valued-functions implemented using
# eponymous virtual tables.
#

set testdir [file dirname $argv0]
source $testdir/tester.tcl
set testprefix tabfunc01

ifcapable !vtab {
  finish_test
  return
}
load_static_extension db series

do_execsql_test tabfunc01-1.1 {
  SELECT *, '|' FROM generate_series WHERE start=1 AND stop=9 AND step=2;
} {1 | 3 | 5 | 7 | 9 |}
do_execsql_test tabfunc01-1.2 {
  SELECT *, '|' FROM generate_series LIMIT 5;
} {0 | 1 | 2 | 3 | 4 |}
do_catchsql_test tabfunc01-1.3 {
  CREATE VIRTUAL TABLE t1 USING generate_series;
} {1 {no such module: generate_series}}
do_execsql_test tabfunc01-1.4 {
  SELECT * FROM generate_series(1,9,2);
} {1 3 5 7 9}
do_execsql_test tabfunc01-1.5 {
  SELECT * FROM generate_series(1,9);
} {1 2 3 4 5 6 7 8 9}
do_execsql_test tabfunc01-1.6 {
  SELECT * FROM generate_series(1,10) WHERE step=3;
} {1 4 7 10}
do_catchsql_test tabfunc01-1.7 {
  SELECT * FROM generate_series(1,9,2,11);
} {1 {too many arguments on generate_series() - max 3}}

do_execsql_test tabfunc01-1.8 {
  SELECT * FROM generate_series(0,32,5) ORDER BY rowid DESC;
} {30 25 20 15 10 5 0}
do_execsql_test tabfunc01-1.9 {
  SELECT rowid, * FROM generate_series(0,32,5) ORDER BY value DESC;
} {1 30 2 25 3 20 4 15 5 10 6 5 7 0}
do_execsql_test tabfunc01-1.10 {
  SELECT rowid, * FROM generate_series(0,32,5) ORDER BY +value DESC;
} {7 30 6 25 5 20 4 15 3 10 2 5 1 0}

do_execsql_test tabfunc01-1.20 {
  CREATE VIEW v1(a,b) AS VALUES(1,2),(3,4);
  SELECT * FROM v1;
} {1 2 3 4}
do_catchsql_test tabfunc01-1.21.1 {
  SELECT * FROM v1(55);
} {1 {'v1' is not a function}}
do_catchsql_test tabfunc01-1.21.2 {
  SELECT * FROM v1();
} {1 {'v1' is not a function}}
do_execsql_test tabfunc01-1.22 {
  CREATE VIEW v2(x) AS SELECT value FROM generate_series(1,5);
  SELECT * FROM v2;
} {1 2 3 4 5}
do_catchsql_test tabfunc01-1.23.1 {
  SELECT * FROM v2(55);
} {1 {'v2' is not a function}}
do_catchsql_test tabfunc01-1.23.2 {
  SELECT * FROM v2();
} {1 {'v2' is not a function}}
do_execsql_test tabfunc01-1.24 {
  CREATE TABLE t0(x);
  INSERT INTO t0(x) VALUES(123),(456),(789);
  SELECT * FROM t0 ORDER BY x;
} {123 456 789}
do_catchsql_test tabfunc01-1.25 {
  SELECT * FROM t0(55) ORDER BY x;
} {1 {'t0' is not a function}}
do_catchsql_test tabfunc01-1.26 {
  WITH w0 AS (SELECT * FROM t0)
  INSERT INTO t0(x) SELECT * FROM w0()
} {1 {'w0' is not a function}}

do_execsql_test tabfunc01-2.1 {
  CREATE TABLE t1(x);
  INSERT INTO t1(x) VALUES(2),(3);
  SELECT *, '|' FROM t1, generate_series(1,x) ORDER BY 1, 2
} {2 1 | 2 2 | 3 1 | 3 2 | 3 3 |}
do_execsql_test tabfunc01-2.2 {
  SELECT *, '|' FROM (SELECT x FROM t1) AS y, generate_series(1,y.x)
  ORDER BY 1, 2;
} {2 1 | 2 2 | 3 1 | 3 2 | 3 3 |}

do_execsql_test tabfunc01-2.50 {
  SELECT * FROM generate_series() LIMIT 5;
} {0 1 2 3 4}

do_execsql_test tabfunc01-3.1 {
  SELECT DISTINCT value FROM generate_series(1,x), t1 ORDER BY 1;
} {1 2 3}

# Eponymous virtual table exists in the "main" schema only
#
do_execsql_test tabfunc01-4.1 {
  SELECT * FROM main.generate_series(1,4)
} {1 2 3 4}
do_catchsql_test tabfunc01-4.2 {
  SELECT * FROM temp.generate_series(1,4)
} {1 {no such table: temp.generate_series}}
do_catchsql_test tabfunc01-4.3 {
  ATTACH ':memory:' AS aux1;
  CREATE TABLE aux1.t1(a,b,c);
  SELECT * FROM aux1.generate_series(1,4)
} {1 {no such table: aux1.generate_series}}

# The next series of tests is verifying that virtual table are able
# to optimize the IN operator, even on terms that are not marked "omit".
# When the generate_series virtual table is compiled for the testfixture,
# the special -DSQLITE_SERIES_CONSTRAINT_VERIFY=1 option is used, which
# causes the xBestIndex method of generate_series to leave the
# sqlite3_index_constraint_usage.omit flag set to 0, which should cause
# the SQLite core to verify the start=, stop=, and step= constraints on
# each step of output.  At one point, the IN operator could not be used
# by virtual tables unless omit was set.
#
do_execsql_test tabfunc01-500 {
  SELECT * FROM generate_series WHERE start IN (1,7) AND stop=20 AND step=10
  ORDER BY +1;
} {1 7 11 17}

finish_test