Send patches - preferably formatted by git format-patch - to patches at archlinux32 dot org.
summaryrefslogtreecommitdiff
path: root/lib/mysql-functions
blob: 076c86887ad55a5172ad2ee67c21cc846c9062bb (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
#!/bin/sh

# contains functions used to access mysql db

# shellcheck disable=SC2016,SC2039,SC2119,SC2120

if [ -z "${base_dir}" ]; then
  # just to make shellcheck happy
  . '../lib/load-configuration'
fi

# base64_encode_each encode each line of stdin with base64

base64_encode_each() {
  local line

  while read -r line; do
    printf '%s' \
      "${line}" | \
      base64 -w0
    printf '\n'
  done
}

# mysql_run_query
# wrapper function to query mysql
mysql_run_query() {
  local query_stdin
  local query_stdout
  local query_stderr

  local file_name_extra
  local file
  local files
  local number

  file_name_extra=''
  if [ "x$1" = 'xunimportant' ]; then
    shift
    file_name_extra='unimportant_'
  elif [ -s "${work_dir}/build-master-sanity" ]; then
    file_name_extra='was_insane_'
  fi

  # we save the query in a file and delete that file if the query succeeded
  query_stdin=$(mktemp "${work_dir}/tmp.mysql-functions.${file_name_extra}query.$(date +'%Y-%m-%dT%T').XXXXXX.stdin")
  query_stdout="${query_stdin%.stdin}.stdout"
  query_stderr="${query_stdin%.stdin}.stderr"
  cat > "${query_stdin}"
  for _ in {1..10}; do
    if [ -f "${query_stdout}" ]; then
      wait_some_time 10 10
    fi
    ${mysql_command} -N --raw --batch "$@" \
      < "${query_stdin}" \
      > "${query_stdout}" \
      2>> "${query_stderr}" \
      && rm "${query_stdin}" "${query_stderr}"
    if ! [ -f "${query_stdin}" ]; then
      # success!
      break
    fi
  done
  # a present query_file means there was an error
  if [ -f "${query_stdin}" ]; then
    >&2 printf 'I could not complete a mysql query!\n'
    files="${query_stdin} ${query_stdout} ${query_stderr}$(
      sed -n '
        s/^.*INFILE "\(\S\+\)".*$/\1/
        T
        p
      ' "${query_stdin}" | \
        cat -n | \
        while read -r number file; do
          cp "${file}" "${query_stdin%.stdin}.infile.${number}"
          printf ' %s' "${query_stdin%.stdin}.infile.${number}"
        done
    )"
    if ${i_am_the_master}; then
      if [ ! -s "${work_dir}/build-master-sanity" ] && \
        [ -z "${file_name_extra}" ]; then
        printf '\001ACTION failed to execute a mysql query - can you have a look at "%s"?.\001\n' \
          "${query_stdin##*/}" \
          | irc_say
      fi
      for file in ${files}; do
        cp "${file}" "${webserver_directory}/mysql-queries/${file##*/}.txt"
        chmod go+r "${webserver_directory}/mysql-queries/${file##*/}.txt"
      done
    fi
    if [ -z "${file_name_extra}" ]; then
      echo 'A mysql query failed.' > \
        "${work_dir}/build-master-sanity"
    else
      # shellcheck disable=SC2086
      rm -f ${files}
    fi
    return 2
  fi
  # shellcheck disable=SC2094
  {
    rm "${query_stdout}"
    cat
  } < \
    "${query_stdout}"
}

# mysql_add_package_source $pkgbase $git_revision $old_git_revision $mod_git_revision $upstream_package_repository $srcinfo_file
# $old_git_revision may be empty, in which case the whole history will be searched (slower)

# shellcheck disable=SC2086
mysql_add_package_source() {
  local pkgbase
  local git_revision
  local old_git_revision
  local mod_git_revision
  local upstream_package_repository
  local srcinfo_file

  pkgbase="$1"
  git_revision="$2"
  old_git_revision="${3:+$3..}"
  mod_git_revision="$4"
  upstream_package_repository="$5"
  srcinfo_file="$6"

  local uses_upstream
  local uses_modification
  local repo
  local repo_path
  local commit_time
  local pkgbuild
  local upstream_package_repository_id

  if grep -qx 'PKGBUILD_mod = \S\+' "${srcinfo_file}"; then
    uses_modification=1
  else
    uses_modification=0
  fi
  if grep -qx 'PKGBUILD = \S\+' "${srcinfo_file}"; then
    uses_upstream=1
    eval 'repo_path="${repo_paths__'"$(sed -n 's/^upstream_git_repository = //;T;p' "${srcinfo_file}")"'}"'
    pkgbuild=$(
      sed -n '
        s/^PKGBUILD = //
        T
        p
      ' "${srcinfo_file}"
    )
    commit_time=$(
      git -C "${repo_path}" log -n 1 --pretty=format:%ct "${old_git_revision}${git_revision}" -- "${pkgbuild}"
    )
    if [ -z "${commit_time}" ]; then
      # We may have modified git_mod_revision!
      commit_time=$(
        git -C "${repo_path}" log -n 1 --pretty=format:%ct "${git_revision}" -- "${pkgbuild}"
      )
    fi
  else
    uses_upstream=0
    commit_time=$(date '+%s')
  fi

  upstream_package_repository_id=$(
    {
      printf 'SELECT `upstream_repositories`.`id`'
      printf ' FROM `upstream_repositories`'
      printf ' WHERE `upstream_repositories`.`name` = from_base64("%s")' \
        "$(
          printf '%s' "${upstream_package_repository}" | \
            base64 -w0
        )"
      printf ' LIMIT 1;\n'
    } | \
      mysql_run_query
  )

  if [ -z "${upstream_package_repository_id}" ]; then
    >&2 printf 'Cannot find upstream package repository "%s" in the database.\n' \
      "${upstream_package_repository}"
    exit 2
  fi

  {
    printf 'INSERT INTO `package_sources`'
    printf ' (`pkgbase`,`git_revision`,`mod_git_revision`,`upstream_package_repository`,`uses_upstream`,`uses_modification`,`commit_time`)'
    printf ' VALUES ('
    printf 'from_base64("%s"),' \
      "$(
        printf '%s' "${pkgbase}" | \
          base64 -w0
      )" \
      "$(
        printf '%s' "${git_revision}" | \
          base64 -w0
      )" \
      "$(
        printf '%s' "${mod_git_revision}" | \
          base64 -w0
      )"
    printf '%s,' \
      "${upstream_package_repository_id}" \
      "${uses_upstream}" \
      "${uses_modification}"
    printf 'from_unixtime(%s))' \
      "${commit_time}"
    printf ' ON DUPLICATE KEY UPDATE `id`=LAST_INSERT_ID(`package_sources`.`id`);\n'
    printf 'SELECT LAST_INSERT_ID();\n'
  } | \
    mysql_run_query
}

# mysql_generate_package_metadata $current_repository_id $package $git_revision $old_git_revision $mod_git_revision $repository

# generate the meta data of a package (dependencies, built packages, ...) in the database
# $old_git_revision may be empty, in which case the whole history will be searched (slower)

mysql_generate_package_metadata() {

  mysql_load_min_and_max_versions

  ( # new shell is intentional
    current_repository_id="$1"
    package="$2"
    git_revision="$3"
    old_git_revision="$4"
    mod_git_revision="$5"
    repository="$6"

    if [[ "${current_repository_id}" = *[!0-9]* ]]; then
      >&2 printf 'mysql_generate_package_metadata(): invalid current_repository_id="%s".\n' \
        "${current_repository_id}"
      exit 2
    fi

    temp_dir=$(mktemp -d 'tmp.mysql-functions.mysql_generate_package_metadata.XXXXXXXXXX' --tmpdir)
    trap 'rm -rf --one-file-system "${temp_dir}"' EXIT

    if ! make_source_info "${package}" "${repository}" "${git_revision}" "${mod_git_revision}" "${temp_dir}/SRCINFO"; then
      printf '"make_source_info %s %s %s %s %s" failed.\n' "${package}" "${repository}" "${git_revision}" "${mod_git_revision}" "${temp_dir}/SRCINFO"
      exit 2
    fi
    # remove empty lines and unsupported architectures
    # TODO: support "pentium3" architecture, too
    sed -i '
      /^[^=]*=\s*$/d
      /^\s*arch = /{
        / \(i[46]86\|any\)$/!d
      }
    ' "${temp_dir}/SRCINFO"

    if [ ! -s "${temp_dir}/SRCINFO" ]; then
      >&2 printf '"make_source_info" had empty output - eh, what?\n'
      exit 2
    fi
    printf '\n\n' >> "${temp_dir}/SRCINFO"

    pkgbase=$(
      grep '^pkgbase = ' "${temp_dir}/SRCINFO" | \
        cut -d' ' -f3
    )
    if [ -z "${pkgbase}" ]; then
      >&2 printf '"make_source_info" did not return a "pkgbase" - eh, what?\n'
      exit 2
    fi

    # add the package source
    package_source_id=$(
      mysql_add_package_source "${pkgbase}" "${git_revision}" "${old_git_revision}" "${mod_git_revision}" "${repository}" "${temp_dir}/SRCINFO"
    )

    {
      sed -n '
        s/^\tarch = //
        T
        p
      ' "${temp_dir}/SRCINFO" | \
        sort -u | \
        grep -vxF 'any' || \
        echo 'any'
    } > \
      "${temp_dir}/architectures"

    # select any specific arch (which will be building the 'any' part of a split package)
    any_arch=$(
      tail -n1 "${temp_dir}/architectures"
    )

    # iterate over all pkgnames
    grep '^pkgname = ' "${temp_dir}/SRCINFO" | \
      cut -d' ' -f3 | \
      while read -r pkgname; do
        sed -n '
          /^pkgbase = \|^pkgname = '"$(str_to_regex "${pkgname}")"'$/,/^$/ {
            s/^pkgname/\t\0/
            /^\S/d
            /^\s*$/d
            s/^\s*//
            p
          }
        ' "${temp_dir}/SRCINFO" > \
        "${temp_dir}/SRCINFO.tmp"

        epoch=$(
          {
            grep -m1 '^epoch = ' "${temp_dir}/SRCINFO.tmp" || \
              echo 'epoch = 0'
          } | \
            cut -d' ' -f3
        )
        pkgver=$(
          grep -m1 '^pkgver = ' "${temp_dir}/SRCINFO.tmp" | \
            cut -d' ' -f3
        )
        pkgrel=$(
          grep -m1 '^pkgrel = ' "${temp_dir}/SRCINFO.tmp" | \
            cut -d' ' -f3
        )

        # iterate over all archs
        grep '^arch = ' "${temp_dir}/SRCINFO.tmp" | \
          cut -d' ' -f3 | \
          while read -r arch; do
            build_arch=$(
              # this binary package is either built by the build_assignment
              # with the identical arch (if existent) or by the one
              # with arch=$any_arch
              grep -xF "${arch}" "${temp_dir}/architectures" || \
                echo "${any_arch}"
            )
            sed '
              s/^\(\S\+\)_'"${arch}"' = /\1 = /
              s/^pkgname = \(\S\+\)$/\0\nprovides = \1='"${epoch}"':'"${pkgver}"'\ndepends = base\nmakedepends = base-devel/
            ' "${temp_dir}/SRCINFO.tmp" | \
            sed '
              s/^arch = \S\+$/arch/
              t
              s/^\(groups\|provides\) = /provides\t/
              t mangle_version
              s/^makedepends = /makedepends\t/
              t mangle_version
              s/^checkdepends = /checkdepends\t/
              t mangle_version
              s/^depends = /rundepends\t/
              t mangle_version
              d
              :mangle_version
              s/\(=\|<\|<=\|>=\|>\)\([^[:space:]-]\+\)$/\t\1\t\2/
              t split_epoch
              h
              s/$/\t>=\t'"${min_version}"'/
              s/\(\s[0-9]\+\):\(\S\+\)$/\1\t\2/
              p
              g
              s/$/\t<=\t'"${max_version}"'/
              /^\S\+depends\s/d
              :split_epoch
              s/\(\s[0-9]\+\):\(\S\+\)$/\1\t\2/
              t
              s/\s\S\+$/\t0\0/
            ' | \
            sed '
              s/^/'"$(
                printf '%s\t' \
                  "${pkgname}" \
                  "${arch}" \
                  "${epoch}" \
                  "${pkgver}" \
                  "${pkgrel}" \
                  "${build_arch}"
              )"'/
            '
          done
        rm "${temp_dir}/SRCINFO.tmp"
      done | \
      sort -u > \
      "${temp_dir}/database-input"

    {
      printf 'CREATE TEMPORARY TABLE `links`('
        printf '`pkgname` VARCHAR(64),'
        printf '`architecture` VARCHAR(16),'
        printf '`epoch` MEDIUMINT,'
        printf '`pkgver` VARCHAR(64),'
        printf '`pkgrel` MEDIUMINT,'
        printf '`build_architecture` VARCHAR(16),'
        printf '`type` VARCHAR(16),'
        printf '`install_target_name` VARCHAR(128),'
        printf '`version_relation` VARCHAR(2),'
        printf '`install_target_epoch` MEDIUMINT,'
        printf '`install_target_version` VARCHAR(64)'
      printf ');\n'
      printf 'LOAD DATA LOCAL INFILE "%s" INTO TABLE `links`;\n' \
        "${temp_dir}/database-input"

      printf 'SET @sub_pkgrel=('
        printf 'SELECT IFNULL('
          printf 'MAX('
          printf '`binary_packages`.`sub_pkgrel`+'
          printf 'IF(`binary_packages_in_repositories`.`repository` IN (%s,%s),0,1)' \
            "${repository_ids__any_build_list}" \
            "${repository_ids__any_to_be_decided}"
          printf '),'
          printf '0'
        printf ')'
        printf ' FROM `links`'
        printf ' JOIN `architectures`'
        printf ' ON `architectures`.`name`=`links`.`architecture`'
        mysql_join_architectures_binary_packages
        printf ' AND `binary_packages`.`%s`=`links`.`%s`' \
          'pkgname' 'pkgname' \
          'epoch' 'epoch' \
          'pkgver' 'pkgver' \
          'pkgrel' 'pkgrel'
        printf ' LEFT'
        mysql_join_binary_packages_binary_packages_in_repositories
      printf ');\n'

      printf 'INSERT IGNORE INTO `build_assignments` ('
        printf '`package_source`,'
        printf '`architecture`'
      printf ') SELECT'
      printf ' %s,`architectures`.`id`' \
        "${package_source_id}"
      printf ' FROM `links`'
      printf ' JOIN `architectures`'
      printf ' ON `architectures`.`name`=`links`.`build_architecture`'
      printf ' WHERE `links`.`type`="arch";\n'

      printf 'INSERT IGNORE INTO `binary_packages` ('
        printf '`build_assignment`,'
        printf '`pkgname`,'
        printf '`epoch`,'
        printf '`pkgver`,'
        printf '`pkgrel`,'
        printf '`sub_pkgrel`,'
        printf '`architecture`'
      printf ') SELECT'
      printf ' `build_assignments`.`id`,'
      printf '`links`.`%s`,' \
        'pkgname' \
        'epoch' \
        'pkgver' \
        'pkgrel'
      printf '@sub_pkgrel,'
      printf '`architectures`.`id`'
      printf ' FROM `links`'
      printf ' JOIN `architectures`'
      printf ' ON `links`.`architecture`=`architectures`.`name`'
      printf ' JOIN `architectures` AS `ba_a`'
      printf ' ON `ba_a`.`name`=`links`.`build_architecture`'
      mysql_join_architectures_build_assignments 'ba_a'
      printf ' AND `build_assignments`.`package_source`=%s' \
        "${package_source_id}"
      printf ' WHERE `links`.`type`="arch";\n'

      printf 'INSERT IGNORE INTO `binary_packages_in_repositories` ('
      printf ' `package`,'
      printf '`repository`'
      printf ') SELECT'
      printf ' `binary_packages`.`id`,'
      printf '%s' \
        "${current_repository_id}"
      printf ' FROM `links`'
      printf ' JOIN `architectures`'
      printf ' ON `architectures`.`name`=`links`.`architecture`'
      mysql_join_architectures_binary_packages
      printf ' AND `binary_packages`.`sub_pkgrel`=@sub_pkgrel'
      printf ' AND `binary_packages`.`%s`=`links`.`%s`' \
        'pkgname' 'pkgname' \
        'epoch' 'epoch' \
        'pkgver' 'pkgver' \
        'pkgrel' 'pkgrel'
      printf ';\n'

      printf 'INSERT IGNORE INTO `install_targets` (`name`)'
      printf ' SELECT `links`.`install_target_name`'
      printf ' FROM `links`;\n'

      printf 'INSERT IGNORE INTO `versions` (`epoch`,`version`)'
      printf ' SELECT'
      printf ' `links`.`install_target_epoch`,'
      printf '`links`.`install_target_version`'
      printf ' FROM `links`;\n'

      for link in 'provides' 'makedepends' 'checkdepends' 'rundepends'; do
        case "${link}" in
          'provides')
            printf 'INSERT IGNORE INTO `install_target_providers` ('
              printf '`package`,'
              printf '`install_target`,'
              printf '`version`'
            printf ') SELECT'
            printf ' `binary_packages`.`id`,'
            printf '`install_targets`.`id`,'
            printf '`versions`.`id`'
          ;;
          'makedepends'|'checkdepends'|'rundepends')
            printf 'INSERT IGNORE INTO `dependencies` ('
              printf '`dependent`,'
              printf '`depending_on`,'
              printf '`dependency_type`,'
              printf '`version`,'
              printf '`version_relation`'
            printf ') SELECT'
            printf ' `binary_packages`.`id`,'
            printf '`install_targets`.`id`,'
            printf '`dependency_types`.`id`,'
            printf '`versions`.`id`,'
            printf '`links`.`version_relation`'
          ;;
        esac
        printf ' FROM `links`'
        printf ' JOIN `architectures`'
        printf ' ON `architectures`.`name`=`links`.`architecture`'
        mysql_join_architectures_binary_packages
        printf ' AND `binary_packages`.`sub_pkgrel`=@sub_pkgrel'
        printf ' AND `binary_packages`.`%s`=`links`.`%s`' \
          'pkgname' 'pkgname' \
          'epoch' 'epoch' \
          'pkgver' 'pkgver' \
          'pkgrel' 'pkgrel'
        printf ' JOIN `install_targets`'
        printf ' ON `install_targets`.`name`=`links`.`install_target_name`'
        printf ' JOIN `versions`'
        printf ' ON `versions`.`epoch`=`links`.`install_target_epoch`'
        printf ' AND `versions`.`version`=`links`.`install_target_version`'
        if [ "${link}" = 'makedepends' ] || \
          [ "${link}" = 'checkdepends' ] || \
          [ "${link}" = 'rundepends' ]; then
          printf ' JOIN `dependency_types`'
          printf ' ON `dependency_types`.`name`="%s"' \
            "${link%depends}"
        fi
        printf ' WHERE `links`.`type`="%s";\n' \
          "${link}"
      done
      printf 'DROP TEMPORARY TABLE `links`;\n'
    } | \
      mysql_run_query

  )
}

# mysql_sanity_check
# do a sanity check on the mysql database

mysql_sanity_check() {
  {
    printf 'SELECT CONCAT("\\"any\\" build-assignment building \\"",`bp_arch`.`name`,"\\" binary package: ",`binary_packages`.`pkgname`)'
    printf ' FROM `binary_packages`'
    mysql_join_binary_packages_build_assignments
    mysql_join_binary_packages_architectures '' 'bp_arch'
    mysql_join_build_assignments_architectures '' 'ba_arch'
    printf ' WHERE `bp_arch`.`name`!="any"'
    printf ' AND `ba_arch`.`name`="any";\n'
    printf 'SELECT DISTINCT CONCAT("package multiple times in equally stable repositories: {",`a_r`.`name`,",",`b_r`.`name`,"}/",`a`.`pkgname`)'
    printf ' FROM `binary_packages` AS `a`'
    mysql_join_binary_packages_binary_packages_in_repositories 'a' 'a_bir'
    mysql_join_binary_packages_in_repositories_repositories 'a_bir' 'a_r'
    printf ' JOIN `repositories` AS `b_r`'
    printf ' ON `a_r`.`stability`=`b_r`.`stability`'
    printf ' AND `a_r`.`architecture`=`b_r`.`architecture`'
    mysql_join_repositories_binary_packages_in_repositories 'b_r' 'b_bir'
    mysql_join_binary_packages_in_repositories_binary_packages 'b_bir' 'b'
    printf ' AND `a`.`pkgname`=`b`.`pkgname`'
    printf ' AND `a`.`id`!=`b`.`id`'
    printf ' AND ('
      printf '`a_r`.`architecture`!=%s' \
        "${architecture_ids__any}"
      printf ' OR `a`.`architecture`=`b`.`architecture`'
    printf ')'
    printf ' WHERE `a_r`.`stability` NOT IN (%s,%s)' \
      "${repository_stability_ids__forbidden}" \
      "${repository_stability_ids__virtual}"
    printf ' AND `b_r`.`stability` NOT IN (%s,%s);\n' \
      "${repository_stability_ids__forbidden}" \
      "${repository_stability_ids__virtual}"
    printf 'SELECT DISTINCT CONCAT("split-package with differing sub_pkgrels on the build-list: ",`a`.`pkgname`)'
    printf ' FROM `binary_packages` AS `a`'
    printf ' JOIN `binary_packages` AS `b` ON `a`.`build_assignment`=`b`.`build_assignment`'
    mysql_join_binary_packages_binary_packages_in_repositories 'a' 'a_bir'
    mysql_join_binary_packages_binary_packages_in_repositories 'b' 'b_bir'
    printf ' WHERE `a`.`sub_pkgrel`!=`b`.`sub_pkgrel`'
    printf ' AND `%s_bir`.`repository`=%s' \
      'a' "${repository_ids__any_build_list}" \
      'b' "${repository_ids__any_build_list}"
    printf ';\n'
    printf 'SELECT DISTINCT CONCAT("non-virtual binary-package without checksum: ",'
    mysql_package_name_query
    printf ') FROM `binary_packages`'
    mysql_join_binary_packages_architectures
    mysql_join_binary_packages_binary_packages_in_repositories
    mysql_join_binary_packages_in_repositories_repositories
    printf ' WHERE `repositories`.`is_on_master_mirror`'
    printf ' AND `binary_packages`.`sha512sum` IS NULL;\n'
  } | \
    mysql_run_query | \
    sed '
      s,^,<font color="#FF0000">,
      s,$,</font>,
    '
  ( # new shell is intentional
    temp_dir=$(mktemp -d 'tmp.mysql-functions.mysql_sanity_check.XXXXXXXXXX' --tmpdir)
    trap 'rm -rf --one-file-system "${temp_dir}"' EXIT

    for arch in 'i486' 'i686'; do
      for dir in $(ls_master_mirror "${arch}"); do
        ls_master_mirror "${arch}/${dir}" | \
          sed '
            /\.pkg\.tar\.xz$/!d
            s|^|'"${arch}"'/'"${dir}"'/|
          '
      done
    done | \
      sort > \
      "${temp_dir}/master-mirror-listing"

    {
      printf 'SELECT CONCAT(`r_a`.`name`,"/",`repositories`.`name`,"/",'
      mysql_package_name_query
      printf ') FROM `binary_packages_in_repositories`'
      mysql_join_binary_packages_in_repositories_binary_packages
      mysql_join_binary_packages_architectures
      mysql_join_binary_packages_in_repositories_repositories
      mysql_join_repositories_architectures '' 'r_a'
      printf ' WHERE `repositories`.`is_on_master_mirror`'
    } | \
      mysql_run_query | \
      sed '
        s,\t,/,
        s,\t,/,
        s,\t,-,
        s,\t,:,
        s,\t,-,
        s,\t,.,
        s,\t,-,
      ' | \
      sort > \
      "${temp_dir}/mysql-packages"

    diff -u \
      "${temp_dir}/master-mirror-listing" \
      "${temp_dir}/mysql-packages"

    # shellcheck disable=SC2041
    ls_master_mirror 'pool' | \
      sed '
        s/\.sig$//
        /\.pkg\.tar\.xz$/ !d
      ' | \
      sort | \
      uniq -c | \
      grep '^\s*2\s' | \
      awk '{print $2}' > \
      "${temp_dir}/master-mirror-pool"

    {
      printf 'SELECT '
      mysql_package_name_query
      printf ' FROM `binary_packages`'
      mysql_join_binary_packages_architectures
      printf ' WHERE NOT EXISTS ('
        printf 'SELECT 1 FROM `binary_packages_in_repositories`'
        mysql_join_binary_packages_in_repositories_repositories
        printf ' WHERE NOT `repositories`.`is_on_master_mirror`'
        printf ' AND `binary_packages_in_repositories`.`package`=`binary_packages`.`id`'
      printf ') OR EXISTS ('
        printf 'SELECT 1 FROM `binary_packages_in_repositories`'
        mysql_join_binary_packages_in_repositories_repositories
        printf ' WHERE `repositories`.`is_on_master_mirror`'
        printf ' AND `binary_packages_in_repositories`.`package`=`binary_packages`.`id`'
      printf ')'
    } | \
      mysql_run_query | \
      sort > \
      "${temp_dir}/mysql-packages-pool"

    diff -u \
      "${temp_dir}/master-mirror-pool" \
      "${temp_dir}/mysql-packages-pool"
  )
}

mysql_find_build_assignment_loops() {
  new_loops=$(
    {
      printf 'SELECT DISTINCT `packages_dependency`.`build_assignment`,`packages_dependent`.`build_assignment`'
      printf ' FROM `dependencies`'
      mysql_join_dependencies_dependency_types
      mysql_join_dependencies_install_target_providers_with_versions
      mysql_join_install_target_providers_binary_packages '' 'packages_dependency'
      mysql_join_dependencies_binary_packages '' 'packages_dependent'
      mysql_join_binary_packages_binary_packages_in_repositories 'packages_dependency' 'packages_in_repository_dependency'
      mysql_join_binary_packages_binary_packages_in_repositories 'packages_dependent' 'packages_in_repository_dependent'
      printf ' WHERE `packages_in_repository_dependent`.`repository`=%s' \
        "${repository_ids__any_build_list}"
      printf ' AND `packages_in_repository_dependency`.`repository`=%s' \
        "${repository_ids__any_build_list}"
      printf ' AND `dependency_types`.`relevant_for_building`;\n'
    } | \
      mysql_run_query | \
      tr '\t' ' ' | \
      tsort 2>&1 >/dev/null | \
      sed 's/^tsort:\s*//' | \
      {
        loop=0
        while read -r id; do
          if [ "x${id}" = 'x-: input contains a loop:' ]; then
            loop=$((loop+1))
            continue
          fi
          if ! printf '%s' "${id}" | tr '\n' ' ' | grep -q '^[0-9]\+$'; then
            >&2 printf 'ERROR: non-numeric id "%s"\n' "${id}"
            continue
          fi
          printf '(%s,%s),' "${loop}" "${id}"
        done | \
          sed 's/,$//'
      }
  )
  {
    printf 'DELETE FROM `build_dependency_loops`;\n'
    if [ -n "${new_loops}" ]; then
      printf 'INSERT INTO `build_dependency_loops` (`loop`,`build_assignment`) VALUES %s;\n' \
        "${new_loops}"
    fi
  } | \
    mysql_run_query
}

# mysql_cleanup [dry]
# clean up left overs from mysql database
mysql_cleanup() {
  local operator
  if [ "$#" = '0' ]; then
    operator='DELETE'
  elif [ "$#" = '1' ] && [ "x$1" = 'xdry' ]; then
    operator='SELECT COUNT(1)'
  else
    >&2 echo 'Unknown parameter'
    >&2 echo 'Call "mysql_clean_up" or "mysql_clean_up dry".'
    exit 2
  fi
  {
    # remove to-be-decided binary_packages_in_repositories
    printf '%s ' \
      "${operator}"
    if [ "${operator}" = 'DELETE' ]; then
      printf '`binary_packages_in_repositories` '
    fi
    printf 'FROM `binary_packages`'
    mysql_join_binary_packages_binary_packages_in_repositories
    printf ' WHERE `binary_packages_in_repositories`.`repository`=%s;\n' \
      "${repository_ids__any_to_be_decided}"
    # remove virtual binary_packages w/o binary_packages_in_repositories
    printf '%s ' \
      "${operator}"
    if [ "${operator}" = 'DELETE' ]; then
      printf '`binary_packages` '
    fi
    printf 'FROM `binary_packages`'
    printf ' WHERE `binary_packages`.`sha512sum` IS NULL'
    printf ' AND NOT EXISTS ('
      printf 'SELECT 1 FROM `binary_packages_in_repositories` '
      printf 'WHERE `binary_packages_in_repositories`.`package`=`binary_packages`.`id`'
    printf ');\n'
    # remove build_assignments w/o binary_package
    printf '%s FROM `build_assignments` ' \
      "${operator}"
    printf 'WHERE NOT EXISTS '
    printf '('
      printf 'SELECT 1 FROM `binary_packages` '
      printf 'WHERE `binary_packages`.`build_assignment`=`build_assignments`.`id`'
    printf ');\n'
    # remove failed_builds with unbroken build_assignments
    printf '%s ' \
      "${operator}"
    if [ "${operator}" = 'DELETE' ]; then
      printf '`failed_builds` '
    fi
    printf 'FROM `failed_builds` '
    mysql_join_failed_builds_build_assignments
    printf 'WHERE NOT `build_assignments`.`is_broken`'
    printf ';\n'
    # remove package_sources w/o build_assignment
    printf '%s FROM `package_sources` ' \
      "${operator}"
    printf 'WHERE NOT EXISTS '
    printf '('
      printf 'SELECT 1 FROM `build_assignments` '
      printf 'WHERE `build_assignments`.`package_source`=`package_sources`.`id`'
    printf ');\n'
    # remove jobs from build slaves that are not on the build-list
    if [ "${operator}" = 'DELETE' ]; then
      printf 'UPDATE `binary_packages_in_repositories`'
    else
      printf 'SELECT COUNT(DISTINCT `build_slaves`.`id`) FROM `binary_packages_in_repositories`'
    fi
    mysql_join_binary_packages_in_repositories_binary_packages
    printf ' AND `binary_packages_in_repositories`.`repository`=%s' \
      "${repository_ids__any_build_list}"
    printf ' RIGHT'
    mysql_join_binary_packages_build_slaves
    if [ "${operator}" = 'DELETE' ]; then
      printf ' SET `build_slaves`.`currently_building`=NULL'
    fi
    printf ' WHERE `build_slaves`.`currently_building` IS NOT NULL'
    printf ' AND `binary_packages_in_repositories`.`id` IS NULL;\n'
    # remove build orders from build slaves which have not connected within 1h
    if [ "${operator}" = 'DELETE' ]; then
      printf 'UPDATE `build_slaves`'
      printf ' SET `build_slaves`.`currently_building`=NULL'
    else
      printf 'SELECT COUNT(1) FROM `build_slaves`'
    fi
    printf ' WHERE `build_slaves`.`currently_building` IS NOT NULL'
    printf ' AND TIMEDIFF(NOW(),('
      printf 'SELECT MAX(`ssh_log`.`date`) FROM `ssh_log`'
      printf ' WHERE `ssh_log`.`build_slave`=`build_slaves`.`id`'
    printf ')) > "1:00:00";\n'
    # remove `last_action`, `trials` and `logged_lines` from buildslaves without an assignment
    if [ "${operator}" = 'DELETE' ]; then
      printf 'UPDATE `build_slaves`'
      printf ' SET `build_slaves`.`last_action`=NULL,'
      printf ' `build_slaves`.`logged_lines`=NULL,'
      printf ' `build_slaves`.`trials`=NULL'
    else
      printf 'SELECT COUNT(1) FROM `build_slaves`'
    fi
    printf ' WHERE `build_slaves`.`currently_building` IS NULL'
    printf ' AND (`build_slaves`.`last_action` IS NOT NULL'
    printf ' OR `build_slaves`.`logged_lines` IS NOT NULL'
    printf ' OR `build_slaves`.`trials` IS NOT NULL);\n'
  } | \
    mysql_run_query 'unimportant'
}

# TODO: we do not need to wait for makedepends, as long as _any_
# available package provides the makedepends

# mysql_query_has_pending_dependencies builder-architecture `build_assignment`.`id`
# print a mysql query giving whether dependencies are pending
mysql_query_has_pending_dependencies() {
  printf 'EXISTS ('
    printf 'SELECT 1 FROM `binary_packages_in_repositories` as `todos_bpir`'
    mysql_join_binary_packages_in_repositories_binary_packages 'todos_bpir' 'todos'
    printf ' JOIN `architecture_compatibilities` AS `todo_ac`'
    printf ' ON `todos`.`architecture`=`todo_ac`.`runs_on`'
    mysql_join_binary_packages_dependencies 'todos' 'l_deps'
    mysql_join_dependencies_dependency_types 'l_deps' 'l_dep_ts'
    mysql_join_dependencies_install_target_providers_with_versions 'l_deps' 'l_itps'
    mysql_join_install_target_providers_binary_packages 'l_itps' 'deps'
    printf ' JOIN `architecture_compatibilities` AS `dep_ac`'
    printf ' ON `deps`.`architecture`=`dep_ac`.`runs_on`'
    mysql_join_binary_packages_binary_packages_in_repositories 'deps' 'deps_bpir'
    printf ' WHERE'
    printf ' `%s`.`repository`=%s AND' \
      'deps_bpir' "${repository_ids__any_build_list}" \
      'todos_bpir' "${repository_ids__any_build_list}"
    printf ' `l_dep_ts`.`relevant_for_building` AND '
    printf ' `deps`.`build_assignment`!=`todos`.`build_assignment` AND'
    printf ' `todos`.`build_assignment`=%s' \
      "$2"
    printf ' AND `%s`.`runs_on`=%s' \
      'todo_ac' "$1" \
      'dep_ac' "$1"
  printf ')'
}

# mysql_query_is_part_of_loop `build_assignment`.`id`
# print a mysql query giving whether the package is part of a loop
mysql_query_is_part_of_loop() {
  printf 'EXISTS ('
    printf 'SELECT 1 FROM `build_dependency_loops`'
    printf ' WHERE `build_dependency_loops`.`build_assignment`=%s' \
      "$1"
  printf ')'
}

# mysql_query_select_pkgbase_and_revision
# print the part of a mysql query giving:
# pkgbase git_revision mod_git_revision upstream_package_repository
mysql_query_select_pkgbase_and_revision() {
  printf '`package_sources`.`%s`,' \
    'pkgbase' \
    'git_revision' \
    'mod_git_revision'
  printf '`upstream_repositories`.`name`'
  printf ' FROM `build_assignments`'
  mysql_join_build_assignments_package_sources
  mysql_join_package_sources_upstream_repositories
}

# mysql_package_name_query [binary_packages] [architectures]
# print a mysql query of the full name of a package file

mysql_package_name_query() {
  local bp_name="${1:-binary_packages}"
  local a_name="${2:-architectures}"
  printf 'CONCAT('
  printf '`%s`.`pkgname`,"-",' "${bp_name}"
  printf 'IF(`%s`.`epoch`=0,"",CONCAT(`%s`.`epoch`,":")),' "${bp_name}" "${bp_name}"
  printf '`%s`.`pkgver`,"-",' "${bp_name}"
  printf '`%s`.`pkgrel`,' "${bp_name}"
  printf 'IF(`%s`.`sub_pkgrel_omitted`,"",CONCAT(".",`%s`.`sub_pkgrel`)),"-",' "${bp_name}" "${bp_name}"
  printf '`%s`.`name`,".pkg.tar.xz"' "${a_name}"
  printf ')'
}

# mysql_join_*_*
# print 'JOIN' part of mysql query to connect the respective tables
# these functions take 2 optional arguments, acting as aliases for
# the tables

# mysql_join__generic $table_a $column_a $table_b $column_b
# create mysql_join_${table_a}_${table_b}() function

mysql_join__generic() {
  eval "$(
    printf 'mysql_join_%s_%s() {\n' "$1" "$3"
    printf '  printf '"'"' JOIN `%s`'"'"'\n' "$3"
    printf '  if [ -n "$2" ]; then\n'
    printf '    printf '"'"' AS `%%s`'"'"' "$2"\n'
    printf '  fi\n'
    printf '  if [ -n "$1" ]; then\n'
    printf '    printf '"'"' ON `%%s`.`%s`='"'"' "$1"\n' "$2"
    printf '  else\n'
    printf '    printf '"'"' ON `%s`.`%s`='"'"'\n' "$1" "$2"
    printf '  fi\n'
    printf '  if [ -n "$2" ]; then\n'
    printf '    printf '"'"'`%%s`.`%s`'"'"' "$2"\n' "$4"
    printf '  else\n'
    printf '    printf '"'"'`%s`.`%s`'"'"'\n' "$3" "$4"
    printf '  fi\n'
    printf '}\n'
  )"
}

for link in \
  'allowed_email_actions:action:email_actions' \
  'allowed_email_actions:gpg_key:gpg_keys' \
  \
  'binary_packages:architecture:architectures' \
  'binary_packages:build_assignment:build_assignments' \
  \
  'binary_packages_in_repositories:package:binary_packages' \
  'binary_packages_in_repositories:repository:repositories' \
  \
  'build_assignments:architecture:architectures' \
  'build_assignments:package_source:package_sources' \
  \
  'build_dependency_loops:build_assignment:build_assignments' \
  'build_dependency_loops:build_assignment build_assignment:binary_packages' \
  \
  'build_slaves:currently_building:build_assignments' \
  'build_slaves:currently_building build_assignment:binary_packages' \
  'build_slaves:ssh_key:ssh_keys' \
  \
  'dependencies:depending_on:install_targets' \
  'dependencies:dependent:binary_packages' \
  'dependencies:dependent package:binary_packages_in_repositories' \
  'dependencies:dependency_type:dependency_types' \
  'dependencies:version:versions' \
  \
  'email_log:action:email_actions' \
  'email_log:gpg_key:gpg_keys' \
  \
  'failed_builds:reason:fail_reasons' \
  'failed_builds:build_assignment:build_assignments' \
  'failed_builds:build_slave:build_slaves' \
  \
  'gpg_keys:owner:persons' \
  \
  'install_target_providers:package:binary_packages' \
  'install_target_providers:package package:binary_packages_in_repositories' \
  'install_target_providers:install_target:install_targets' \
  'install_target_providers:install_target depending_on:dependencies' \
  'install_target_providers:version:versions' \
  \
  'package_sources:upstream_package_repository:upstream_repositories' \
  \
  'repositories:stability:repository_stabilities' \
  'repositories:architecture:architectures' \
  \
  'repository_moves:upstream_package_repository:upstream_repositories' \
  'repository_moves:upstream_package_repository upstream_package_repository:package_sources' \
  \
  'ssh_keys:owner:persons' \
  \
  'ssh_log:build_slave:build_slaves' \
  \
  'upstream_repositories:git_repository:git_repositories'; do
# A join for these cannot be done, because it's not clear on what to join:
#  'repository_stability_relations:more_stable:repository_stabilities'
#  'repository_stability_relations:less_stable:repository_stabilities'

  table_b="${link##*:}"
  table_a="${link%:*}"
  column_b="${table_a##*:}"
  table_a="${table_a%:*}"
  column_a="${column_b% *}"
  if [ "${column_a}" = "${column_b}" ]; then
    column_b='id'
  else
    column_b="${column_b##* }"
  fi

  mysql_join__generic "${table_a}" "${column_a}" "${table_b}" "${column_b}"
  mysql_join__generic "${table_b}" "${column_b}" "${table_a}" "${column_a}"
done

# mysql_join_install_target_providers_dependencies_with_versions() and
# mysql_join_dependencies_install_target_providers_with_versions() also
# join via `versions`
mysql_join_install_target_providers_dependencies_with_versions() {
  local relation
  mysql_join_install_target_providers_dependencies "$1" "$2"
  mysql_join_install_target_providers_versions "$1" "${1:-install_target_providers}_versions"
  mysql_join_dependencies_versions "$2" "${2:-dependencies}_versions"
  printf ' AND ('
    for relation in '<' '<=' '>' '>=' '='; do
      printf '('
        printf '`%s`.`version_relation`="%s"' \
          "${2:-dependencies}" \
          "${relation}"
        printf ' AND `%s`.`order`%s`%s`.`order`' \
          "${1:-install_target_providers}_versions" \
          "${relation}" \
          "${2:-dependencies}_versions"
      printf ') OR '
    done | \
      sed '
        s/ OR $//
      '
  printf ')'
}

mysql_join_dependencies_install_target_providers_with_versions() {
  local relation
  mysql_join_dependencies_install_target_providers "$1" "$2"
  mysql_join_install_target_providers_versions "$2" "${2:-install_target_providers}_versions"
  mysql_join_dependencies_versions "$1" "${1:-dependencies}_versions"
  printf ' AND ('
    for relation in '<' '<=' '>' '>=' '='; do
      printf '('
        printf '`%s`.`version_relation`="%s"' \
          "${1:-dependencies}" \
          "${relation}"
        printf ' AND `%s`.`order`%s`%s`.`order`' \
          "${2:-install_target_providers}_versions" \
          "${relation}" \
          "${1:-dependencies}_versions"
      printf ') OR '
    done | \
      sed '
        s/ OR $//
      '
  printf ')'
}

# mysql_retrieve_static_information
# retrieve some static information from the database:
# - ids of architectures -> $architecture_ids__$arch
# - ids of package repositories -> $repository_ids__$arch_$repo
# - names and paths of git_repositories
# - ids of repository_stabilities
mysql_retrieve_static_information() {
  eval "$(
    {
      printf 'SELECT REPLACE(CONCAT('
      printf '"architecture_ids__",'
      printf '`architectures`.`name`,"=",'
      printf '`architectures`.`id`'
      printf '),"-","_") FROM `architectures`;\n'
      printf 'SELECT REPLACE(CONCAT('
      printf '"repository_ids__",'
      printf '`architectures`.`name`,"_",'
      printf '`repositories`.`name`,"=",'
      printf '`repositories`.`id`'
      printf '),"-","_") FROM `repositories`'
      mysql_join_repositories_architectures
      printf ';\n'
      printf 'SELECT CONCAT('
      printf '"repo_names=\\"",'
      printf 'REPLACE(GROUP_CONCAT(`git_repositories`.`name`),","," "),'
      printf '"\\"")'
      printf ' FROM `git_repositories`'
      printf ' GROUP BY "1";\n'
      printf 'SELECT CONCAT('
      printf '"repo_paths__",'
      printf '`git_repositories`.`name`,"=",'
      printf '"\\"",`git_repositories`.`directory`,"\\"")'
      printf ' FROM `git_repositories`;\n'
      printf 'SELECT CONCAT('
      printf '"repository_stability_ids__",'
      printf '`repository_stabilities`.`name`,"=",'
      printf '`repository_stabilities`.`id`)'
      printf ' FROM `repository_stabilities`;\n'
    } | \
      mysql_run_query
  )"
}

# mysql_query_and_delete_unneeded_binary_packages
# print a query which lists and deletes binary_packages which are not
# linked from binary_packages_in_repositories
mysql_query_and_delete_unneeded_binary_packages() {
  printf 'SELECT CONCAT("pool/",'
  mysql_package_name_query
  printf ') FROM `binary_packages`'
  mysql_join_binary_packages_architectures
  printf ' WHERE NOT EXISTS ('
    printf 'SELECT 1 FROM `binary_packages_in_repositories`'
    printf ' WHERE `binary_packages_in_repositories`.`package`=`binary_packages`.`id`'
  printf ');\n'
  printf 'DELETE `binary_packages` FROM `binary_packages`'
  printf ' WHERE NOT EXISTS ('
    printf 'SELECT 1 FROM `binary_packages_in_repositories`'
    printf ' WHERE `binary_packages_in_repositories`.`package`=`binary_packages`.`id`'
  printf ');\n'
}

# mysql_query_create_toolchain_order
# write query, creating `toolchain_order` and `toolchain_order_copy`
# temporary tables
mysql_query_create_toolchain_order() {
  # We force the following build order of the tool-chain:
  # linux-api-headers->glibc->binutils->gcc->binutils->glibc
  for suffix in '' '_copy'; do
    printf 'CREATE TEMPORARY TABLE `toolchain_order%s` (' \
      "${suffix}"
      printf '`number` SMALLINT,'
      printf '`pkgbase` VARCHAR(64),'
      printf 'PRIMARY KEY `number`(`number`)'
    printf ');\n'
  done
  printf 'INSERT INTO `toolchain_order` (`number`,`pkgbase`) VALUES '
  printf '(%s,"%s"),' \
    0 'linux-api-headers' \
    1 'glibc' \
    2 'binutils' \
    3 'gcc' \
    4 'binutils' \
    5 'glibc' | \
    sed 's/,$/;\n/'
  printf 'INSERT INTO `toolchain_order_copy` (`number`,`pkgbase`)'
  printf ' SELECT `toolchain_order`.`number`,`toolchain_order`.`pkgbase`'
  printf ' FROM `toolchain_order`;\n'
}

# mysql_update_versions_ordering
# calculate the correct ordering of `versions` entries
mysql_update_versions_ordering() {
  ( # new shell is intentional
    tmp_file=$(mktemp "${work_dir}/tmp.mysql-functions.mysql_update_versions_ordering.XXXXXX")
    trap 'rm "${tmp_file}"' EXIT
    {
      printf 'SELECT '
      printf 'CONCAT('
        printf '`versions`.`epoch`,":",'
        printf '`versions`.`version`'
      printf '),'
      printf '`versions`.`id`'
      printf ' FROM `versions`;\n'
    } | \
      mysql_run_query | \
      expand_version 1 | \
      sort -k1V,1 | \
      cat -n | \
      sed '
        s/^\s*\([0-9]\+\)\s\+\S\+\s\+\([0-9]\+\)$/\1\t\2/
      ' > \
      "${tmp_file}"
    {
      printf 'CREATE TEMPORARY TABLE `v`('
        printf '`id` BIGINT,'
        printf '`order` BIGINT,'
        printf 'PRIMARY KEY `id`(`id`)'
      printf ');\n'
      printf 'LOAD DATA LOCAL INFILE "%s" INTO TABLE `v`(`order`,`id`);\n' \
        "${tmp_file}"
      printf 'UPDATE `versions`'
      printf ' JOIN `v`'
      printf ' ON `v`.`id`=`versions`.`id`'
      printf ' SET `versions`.`order`=`v`.`order`;\n'
      printf 'DROP TEMPORARY TABLE `v`;\n'
    } | \
      mysql_run_query
  )
}

# mysql_sort_versions [-f]
# sort the table of versions, iff versions without order exist or -f was
# given

mysql_sort_versions() {
  ( # new shell is intentional
    tmp_file=$(
      mktemp "tmp.mysql_sort_versions.XXXXXXXXXX" --tmpdir
    )
    trap 'rm "${tmp_file}"' EXIT
    if [ "x$1" != 'x-f' ] && \
      {
        printf 'SELECT'
        printf ' COUNT(1)'
        printf ' FROM `versions`'
        printf ' WHERE `versions`.`order` IS NULL'
      } | \
        mysql_run_query | \
        grep -qxF '0'; then
      # nothing to do
      exit 0
    fi
    {
      printf 'SELECT '
      printf '`versions`.`%s`,' \
        'id' \
        'epoch' \
        'version' | \
        sed 's/,$//'
      printf ' FROM `versions`;\n'
    } | \
      mysql_run_query | \
      expand_version 3 | \
      sort -k2n,2 -k3V,3 | \
      cut -f1 | \
      cat -n | \
      awk '{print $1 " " $2}' | \
      tr ' ' '\t' > \
      "${tmp_file}"
    max_order=$(
      {
        printf 'SELECT'
        printf ' GREATEST(%s,' \
          "$(
            wc -l < "${tmp_file}"
          )"
        printf 'MAX(`versions`.`order`))'
        printf ' FROM `versions`;\n'
      } | \
        mysql_run_query
    )
    {
      printf 'CREATE TEMPORARY TABLE `vs`('
        printf '`id` BIGINT,'
        printf '`ord` BIGINT,'
        printf 'UNIQUE KEY(`id`),'
        printf 'UNIQUE KEY(`ord`)'
      printf ');\n'
      printf 'LOAD DATA LOCAL INFILE "%s" INTO TABLE `vs`(`ord`,`id`);\n' \
        "${tmp_file}"
      printf 'UPDATE `versions`'
      printf ' SET `versions`.`order`=`versions`.`order`+1+%s;\n' \
        "${max_order}"
      printf 'COMMIT;\n'
      printf 'UPDATE `versions`'
      printf ' JOIN `vs`'
      printf ' ON `vs`.`id`=`versions`.`id`'
      printf ' SET `versions`.`order`=`vs`.`ord`;\n'
    } | \
      mysql_run_query
  )
}

# mysql_load_min_and_max_versions
# load the minimal and maximal versions into min_version and max_version

mysql_load_min_and_max_versions() {
  if [ -z "${min_version}" ]; then
    min_version=$(
      {
        printf 'SELECT CONCAT(`versions`.`epoch`,":",`versions`.`version`)'
        printf ' FROM `versions`'
        printf ' ORDER BY `versions`.`order`'
        printf ' LIMIT 1'
      } | \
      mysql_run_query
    )
  fi

  if [ -z "${max_version}" ]; then
    max_version=$(
      {
        printf 'SELECT CONCAT(`versions`.`epoch`,":",`versions`.`version`)'
        printf ' FROM `versions`'
        printf ' ORDER BY `versions`.`order` DESC'
        printf ' LIMIT 1'
      } | \
      mysql_run_query
    )
  fi
}

# mysql_query_remove_old_binary_packages_from_build_list
# print a query to remove old versions of packages from the build-list
mysql_query_remove_old_binary_packages_from_build_list() {
  printf 'DELETE `d_bpir`'
  printf ' FROM `binary_packages_in_repositories` AS `d_bpir`'
  mysql_join_binary_packages_in_repositories_binary_packages 'd_bpir' 'd_bp'
  printf ' JOIN `versions` as `d_v`'
  printf ' ON `d_bp`.`epoch`=`d_v`.`epoch`'
  printf ' AND `d_bp`.`pkgver`=`d_v`.`version`'
  printf ' JOIN `binary_packages` AS `n_bp`'
  printf ' ON `d_bp`.`pkgname`=`n_bp`.`pkgname`'
  printf ' JOIN `versions` as `n_v`'
  printf ' ON `n_bp`.`epoch`=`n_v`.`epoch`'
  printf ' AND `n_bp`.`pkgver`=`n_v`.`version`'
  mysql_join_binary_packages_binary_packages_in_repositories 'n_bp' 'n_bpir'
  printf ' WHERE `d_bpir`.`repository`=%s' \
    "${repository_ids__any_build_list}"
  printf ' AND `n_bpir`.`repository`=%s' \
    "${repository_ids__any_build_list}"
  printf ' AND ('
    printf '`n_v`.`order`>`d_v`.`order`'
    printf ' OR ('
      printf '`n_v`.`order`=`d_v`.`order`'
      printf ' AND ('
        printf '`n_bp`.`pkgrel`>`d_bp`.`pkgrel`'
        printf ' OR ('
          printf '`n_bp`.`pkgrel`=`d_bp`.`pkgrel`'
          printf ' AND `n_bp`.`sub_pkgrel`>`d_bp`.`sub_pkgrel`'
        printf ')'
      printf ')'
    printf ')'
  printf ');\n'
}