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You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"9d46f033-55bf-49dd-b735-afa97f0fd86e","timestamp":"2026-03-13T16:11:42.924Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/internal/repository/migrations/sqlite3/11_optimize-indexes.up.sql","content":"-- Migration 11: Remove overly specific table indexes formerly used in sorting\n-- When one or two indexed columns are used, sorting usually is fast\n-- Reduces from ~78 indexes to 48 for better write performance,\n-- reduced disk usage, and more reliable query planner decisions.\n-- Requires ANALYZE to be run after migration (done automatically on startup).\n\n-- ============================================================\n-- Drop SELECTED existing job indexes (from migrations 08/09)\n-- sqlite_autoindex_job_1 (UNIQUE constraint) is kept automatically\n-- ============================================================\n\n-- Cluster+Partition Filter Sorting\nDROP INDEX IF EXISTS jobs_cluster_partition_numnodes;\nDROP INDEX IF EXISTS jobs_cluster_partition_numhwthreads;\nDROP INDEX IF EXISTS jobs_cluster_partition_numacc;\nDROP INDEX IF EXISTS jobs_cluster_partition_energy;\n\n-- Cluster+JobState Filter Sorting\nDROP INDEX IF EXISTS jobs_cluster_jobstate_numnodes;\nDROP INDEX IF EXISTS jobs_cluster_jobstate_numhwthreads;\nDROP INDEX IF EXISTS jobs_cluster_jobstate_numacc;\nDROP INDEX IF EXISTS jobs_cluster_jobstate_energy;\n\n-- Cluster+Shared Filter Sorting\nDROP INDEX IF EXISTS jobs_cluster_shared_numnodes;\nDROP INDEX IF EXISTS jobs_cluster_shared_numhwthreads;\nDROP INDEX IF EXISTS jobs_cluster_shared_numacc;\nDROP INDEX IF EXISTS jobs_cluster_shared_energy;\n\n-- User Filter Sorting\nDROP INDEX IF EXISTS jobs_user_numnodes;\nDROP INDEX IF EXISTS jobs_user_numhwthreads;\nDROP INDEX IF EXISTS jobs_user_numacc;\nDROP INDEX IF EXISTS jobs_user_energy;\n\n-- Project Filter Sorting\nDROP INDEX IF EXISTS jobs_project_numnodes;\nDROP INDEX IF EXISTS jobs_project_numhwthreads;\nDROP INDEX IF EXISTS jobs_project_numacc;\nDROP INDEX IF EXISTS jobs_project_energy;\n\n-- JobState Filter Sorting\nDROP INDEX IF EXISTS jobs_jobstate_numnodes;\nDROP INDEX IF EXISTS jobs_jobstate_numhwthreads;\nDROP INDEX IF EXISTS jobs_jobstate_numacc;\nDROP INDEX IF EXISTS jobs_jobstate_energy;\n\n-- Shared Filter Sorting\nDROP INDEX IF EXISTS jobs_shared_numnodes;\nDROP INDEX IF EXISTS jobs_shared_numhwthreads;\nDROP INDEX IF EXISTS jobs_shared_numacc;\nDROP INDEX IF EXISTS jobs_shared_energy;\n\n-- ArrayJob Filter\nDROP INDEX IF EXISTS jobs_cluster_arrayjobid_starttime;\n\n-- Backup Indices For High Variety Columns\nDROP INDEX IF EXISTS jobs_duration;\n\n-- Optimize DB index usage\nPRAGMA optimize;\n","numLines":62,"startLine":1,"totalLines":62}},"sourceToolAssistantUUID":"b627c2e7-7146-4b20-9ac3-2d7c1c1acdd9","userType":"external","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"d7b38bc2-9c86-403c-95ee-c10284ffa933","version":"2.1.74","gitBranch":"hotfix","slug":"elegant-churning-quiche"}
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{"parentUuid":"c60eac61-a57d-4507-809e-b428d5a299b5","isSidechain":false,"promptId":"14117c26-27b3-4724-bf43-14989ae1da46","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01Nqje5A1z9drYoSn9vaNhFF","type":"tool_result","content":"     1→-- Migration 12: Add covering index for grouped stats queries\n     2→-- Column order: cluster (equality), hpc_user (GROUP BY), start_time (range scan)\n     3→-- Includes aggregated columns to avoid main table lookups entirely.\n     4→\n     5→CREATE INDEX IF NOT EXISTS jobs_cluster_user_starttime_stats\n     6→  ON job (cluster, hpc_user, start_time, duration, job_state, num_nodes, num_hwthreads, num_acc);\n     7→\n     8→CREATE INDEX IF NOT EXISTS jobs_cluster_project_starttime_stats\n     9→  ON job (cluster, project, start_time, duration, job_state, num_nodes, num_hwthreads, num_acc);\n    10→\n    11→PRAGMA optimize;\n    12→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"158e94e2-79cc-4080-89e5-6ec52a28efe0","timestamp":"2026-03-13T16:11:43.137Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/internal/repository/migrations/sqlite3/12_stats-covering-index.up.sql","content":"-- Migration 12: Add covering index for grouped stats queries\n-- Column order: cluster (equality), hpc_user (GROUP BY), start_time (range scan)\n-- Includes aggregated columns to avoid main table lookups entirely.\n\nCREATE INDEX IF NOT EXISTS jobs_cluster_user_starttime_stats\n  ON job (cluster, hpc_user, start_time, duration, job_state, num_nodes, num_hwthreads, num_acc);\n\nCREATE INDEX IF NOT EXISTS jobs_cluster_project_starttime_stats\n  ON job (cluster, project, start_time, duration, job_state, num_nodes, num_hwthreads, num_acc);\n\nPRAGMA optimize;\n","numLines":12,"startLine":1,"totalLines":12}},"sourceToolAssistantUUID":"c60eac61-a57d-4507-809e-b428d5a299b5","userType":"external","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"d7b38bc2-9c86-403c-95ee-c10284ffa933","version":"2.1.74","gitBranch":"hotfix","slug":"elegant-churning-quiche"}
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{"parentUuid":"af081522-0abe-4ffb-8cb4-3d6f7af92f0c","isSidechain":false,"type":"progress","data":{"type":"hook_progress","hookEvent":"PostToolUse","hookName":"PostToolUse:Read","command":"callback"},"parentToolUseID":"toolu_015n5nr4jyfKti687RSenPV4","toolUseID":"toolu_015n5nr4jyfKti687RSenPV4","timestamp":"2026-03-13T16:11:43.436Z","uuid":"42670d86-8621-47ec-834d-afbb2e681fe8","userType":"external","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"d7b38bc2-9c86-403c-95ee-c10284ffa933","version":"2.1.74","gitBranch":"hotfix","slug":"elegant-churning-quiche"}
{"parentUuid":"af081522-0abe-4ffb-8cb4-3d6f7af92f0c","isSidechain":false,"promptId":"14117c26-27b3-4724-bf43-14989ae1da46","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_015n5nr4jyfKti687RSenPV4","type":"tool_result","content":"     1→-- Migration 13: Add covering indexes for status/dashboard queries\n     2→-- Column order: cluster (equality), job_state (equality), grouping col, then aggregated columns\n     3→-- These indexes allow the status views to be served entirely from index scans.\n     4→\n     5→CREATE INDEX IF NOT EXISTS jobs_cluster_jobstate_user_stats\n     6→  ON job (cluster, job_state, hpc_user, duration, start_time, num_nodes, num_hwthreads, num_acc);\n     7→\n     8→CREATE INDEX IF NOT EXISTS jobs_cluster_jobstate_project_stats\n     9→  ON job (cluster, job_state, project, duration, start_time, num_nodes, num_hwthreads, num_acc);\n    10→\n    11→CREATE INDEX IF NOT EXISTS jobs_cluster_jobstate_subcluster_stats\n    12→  ON job (cluster, job_state, subcluster, duration, start_time, num_nodes, num_hwthreads, num_acc);\n    13→\n    14→-- Drop 3-col indexes that are now subsumed by the covering indexes above\n    15→DROP INDEX IF EXISTS jobs_cluster_jobstate_user;\n    16→DROP INDEX IF EXISTS jobs_cluster_jobstate_project;\n    17→\n    18→PRAGMA optimize;\n    19→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"444f450a-7540-4122-aa75-ce545293a263","timestamp":"2026-03-13T16:11:43.436Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/internal/repository/migrations/sqlite3/13_status-covering-indexes.up.sql","content":"-- Migration 13: Add covering indexes for status/dashboard queries\n-- Column order: cluster (equality), job_state (equality), grouping col, then aggregated columns\n-- These indexes allow the status views to be served entirely from index scans.\n\nCREATE INDEX IF NOT EXISTS jobs_cluster_jobstate_user_stats\n  ON job (cluster, job_state, hpc_user, duration, start_time, num_nodes, num_hwthreads, num_acc);\n\nCREATE INDEX IF NOT EXISTS jobs_cluster_jobstate_project_stats\n  ON job (cluster, job_state, project, duration, start_time, num_nodes, num_hwthreads, num_acc);\n\nCREATE INDEX IF NOT EXISTS jobs_cluster_jobstate_subcluster_stats\n  ON job (cluster, job_state, subcluster, duration, start_time, num_nodes, num_hwthreads, num_acc);\n\n-- Drop 3-col indexes that are now subsumed by the covering indexes above\nDROP INDEX IF EXISTS jobs_cluster_jobstate_user;\nDROP INDEX IF EXISTS jobs_cluster_jobstate_project;\n\nPRAGMA optimize;\n","numLines":19,"startLine":1,"totalLines":19}},"sourceToolAssistantUUID":"af081522-0abe-4ffb-8cb4-3d6f7af92f0c","userType":"external","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"d7b38bc2-9c86-403c-95ee-c10284ffa933","version":"2.1.74","gitBranch":"hotfix","slug":"elegant-churning-quiche"}
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{"parentUuid":"1a03b73b-8c6a-47a9-ae2b-03f044cfff7f","isSidechain":false,"type":"progress","data":{"type":"hook_progress","hookEvent":"PostToolUse","hookName":"PostToolUse:Read","command":"callback"},"parentToolUseID":"toolu_01DbhSnMGdxMPjvgjZBaCzau","toolUseID":"toolu_01DbhSnMGdxMPjvgjZBaCzau","timestamp":"2026-03-13T16:11:43.593Z","uuid":"78b44936-35cf-4717-9380-57618164d034","userType":"external","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"d7b38bc2-9c86-403c-95ee-c10284ffa933","version":"2.1.74","gitBranch":"hotfix","slug":"elegant-churning-quiche"}
{"parentUuid":"1a03b73b-8c6a-47a9-ae2b-03f044cfff7f","isSidechain":false,"promptId":"14117c26-27b3-4724-bf43-14989ae1da46","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01DbhSnMGdxMPjvgjZBaCzau","type":"tool_result","content":"     1→-- Migration 14: Partial covering indexes for running jobs\n     2→-- Only running jobs are in the B-tree, so these indexes are tiny compared to\n     3→-- the full-table indexes from migration 13. SQLite uses them when the query\n     4→-- contains the literal `job_state = 'running'` (not a parameter placeholder).\n     5→\n     6→CREATE INDEX IF NOT EXISTS jobs_running_user_stats\n     7→  ON job (cluster, hpc_user, num_nodes, num_hwthreads, num_acc, duration, start_time)\n     8→  WHERE job_state = 'running';\n     9→\n    10→CREATE INDEX IF NOT EXISTS jobs_running_project_stats\n    11→  ON job (cluster, project, num_nodes, num_hwthreads, num_acc, duration, start_time)\n    12→  WHERE job_state = 'running';\n    13→\n    14→CREATE INDEX IF NOT EXISTS jobs_running_subcluster_stats\n    15→  ON job (cluster, subcluster, num_nodes, num_hwthreads, num_acc, duration, start_time)\n    16→  WHERE job_state = 'running';\n    17→\n    18→PRAGMA optimize;\n    19→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"2bb36c81-19cf-4701-a887-1cf11cf071b6","timestamp":"2026-03-13T16:11:43.593Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/internal/repository/migrations/sqlite3/14_running-partial-indexes.up.sql","content":"-- Migration 14: Partial covering indexes for running jobs\n-- Only running jobs are in the B-tree, so these indexes are tiny compared to\n-- the full-table indexes from migration 13. SQLite uses them when the query\n-- contains the literal `job_state = 'running'` (not a parameter placeholder).\n\nCREATE INDEX IF NOT EXISTS jobs_running_user_stats\n  ON job (cluster, hpc_user, num_nodes, num_hwthreads, num_acc, duration, start_time)\n  WHERE job_state = 'running';\n\nCREATE INDEX IF NOT EXISTS jobs_running_project_stats\n  ON job (cluster, project, num_nodes, num_hwthreads, num_acc, duration, start_time)\n  WHERE job_state = 'running';\n\nCREATE INDEX IF NOT EXISTS jobs_running_subcluster_stats\n  ON job (cluster, subcluster, num_nodes, num_hwthreads, num_acc, duration, start_time)\n  WHERE job_state = 'running';\n\nPRAGMA optimize;\n","numLines":19,"startLine":1,"totalLines":19}},"sourceToolAssistantUUID":"1a03b73b-8c6a-47a9-ae2b-03f044cfff7f","userType":"external","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"d7b38bc2-9c86-403c-95ee-c10284ffa933","version":"2.1.74","gitBranch":"hotfix","slug":"elegant-churning-quiche"}
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You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"5b0ccded-3898-4b11-8143-1b72db180107","timestamp":"2026-03-13T16:11:47.804Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/internal/repository/migrations/sqlite3/11_optimize-indexes.down.sql","content":"-- Migration 11 DOWN: Restore indexes from migration 09\n\n-- ============================================================\n-- Recreate all removed indexes from migration 09\n-- ============================================================\n\n-- Cluster+Partition Filter Sorting\nCREATE INDEX IF NOT EXISTS jobs_cluster_partition_numnodes ON job (cluster, cluster_partition, num_nodes);\nCREATE INDEX IF NOT EXISTS jobs_cluster_partition_numhwthreads ON job (cluster, cluster_partition, num_hwthreads);\nCREATE INDEX IF NOT EXISTS jobs_cluster_partition_numacc ON job (cluster, cluster_partition, num_acc);\nCREATE INDEX IF NOT EXISTS jobs_cluster_partition_energy ON job (cluster, cluster_partition, energy);\n\n-- Cluster+JobState Filter Sorting\nCREATE INDEX IF NOT EXISTS jobs_cluster_jobstate_numnodes ON job (cluster, job_state, num_nodes);\nCREATE INDEX IF NOT EXISTS jobs_cluster_jobstate_numhwthreads ON job (cluster, job_state, num_hwthreads);\nCREATE INDEX IF NOT EXISTS jobs_cluster_jobstate_numacc ON job (cluster, job_state, num_acc);\nCREATE INDEX IF NOT EXISTS jobs_cluster_jobstate_energy ON job (cluster, job_state, energy);\n\n-- Cluster+Shared Filter Sorting\nCREATE INDEX IF NOT EXISTS jobs_cluster_shared_numnodes ON job (cluster, shared, num_nodes);\nCREATE INDEX IF NOT EXISTS jobs_cluster_shared_numhwthreads ON job (cluster, shared, num_hwthreads);\nCREATE INDEX IF NOT EXISTS jobs_cluster_shared_numacc ON job (cluster, shared, num_acc);\nCREATE INDEX IF NOT EXISTS jobs_cluster_shared_energy ON job (cluster, shared, energy);\n\n-- User Filter Sorting\nCREATE INDEX IF NOT EXISTS jobs_user_numnodes ON job (hpc_user, num_nodes);\nCREATE INDEX IF NOT EXISTS jobs_user_numhwthreads ON job (hpc_user, num_hwthreads);\nCREATE INDEX IF NOT EXISTS jobs_user_numacc ON job (hpc_user, num_acc);\nCREATE INDEX IF NOT EXISTS jobs_user_energy ON job (hpc_user, energy);\n\n-- Project Filter Sorting\nCREATE INDEX IF NOT EXISTS jobs_project_numnodes ON job (project, num_nodes);\nCREATE INDEX IF NOT EXISTS jobs_project_numhwthreads ON job (project, num_hwthreads);\nCREATE INDEX IF NOT EXISTS jobs_project_numacc ON job (project, num_acc);\nCREATE INDEX IF NOT EXISTS jobs_project_energy ON job (project, energy);\n\n-- JobState Filter Sorting\nCREATE INDEX IF NOT EXISTS jobs_jobstate_numnodes ON job (job_state, num_nodes);\nCREATE INDEX IF NOT EXISTS jobs_jobstate_numhwthreads ON job (job_state, num_hwthreads);\nCREATE INDEX IF NOT EXISTS jobs_jobstate_numacc ON job (job_state, num_acc);\nCREATE INDEX IF NOT EXISTS jobs_jobstate_energy ON job (job_state, energy);\n\n-- Shared Filter Sorting\nCREATE INDEX IF NOT EXISTS jobs_shared_numnodes ON job (shared, num_nodes);\nCREATE INDEX IF NOT EXISTS jobs_shared_numhwthreads ON job (shared, num_hwthreads);\nCREATE INDEX IF NOT EXISTS jobs_shared_numacc ON job (shared, num_acc);\nCREATE INDEX IF NOT EXISTS jobs_shared_energy ON job (shared, energy);\n\n-- ArrayJob Filter\nCREATE INDEX IF NOT EXISTS jobs_cluster_arrayjobid_starttime ON job (cluster, array_job_id, start_time);\n\n-- Backup Indices For High Variety Columns\nCREATE INDEX IF NOT EXISTS jobs_duration ON job (duration);\n\n-- Optimize DB index usage\nPRAGMA optimize;\n","numLines":57,"startLine":1,"totalLines":57}},"sourceToolAssistantUUID":"675b77af-1dcc-445a-945b-e1e3c2721402","userType":"external","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"d7b38bc2-9c86-403c-95ee-c10284ffa933","version":"2.1.74","gitBranch":"hotfix","slug":"elegant-churning-quiche"}
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{"parentUuid":"317b82ee-e789-4b5f-803c-a14ae92adc7e","isSidechain":false,"promptId":"14117c26-27b3-4724-bf43-14989ae1da46","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01LrL93CxxRZ1uhEEAsYruNw","type":"tool_result","content":"     1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n     2→// All rights reserved. This file is part of cc-backend.\n     3→// Use of this source code is governed by a MIT-style\n     4→// license that can be found in the LICENSE file.\n     5→\n     6→package repository\n     7→\n     8→import (\n     9→\t\"database/sql\"\n    10→\t\"embed\"\n    11→\t\"fmt\"\n    12→\n    13→\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n    14→\t\"github.com/golang-migrate/migrate/v4\"\n    15→\t\"github.com/golang-migrate/migrate/v4/database/sqlite3\"\n    16→\t\"github.com/golang-migrate/migrate/v4/source/iofs\"\n    17→)\n    18→\n    19→// Version is the current database schema version required by this version of cc-backend.\n    20→// When the database schema changes, this version is incremented and a new migration file\n    21→// is added to internal/repository/migrations/sqlite3/.\n    22→//\n    23→// Version history:\n    24→//   - Version 14: Partial covering indexes for running jobs (tiny B-tree vs millions)\n    25→//   - Version 13: Add covering indexes for status/dashboard queries (cluster, job_state, ...)\n    26→//   - Version 12: Add covering index for stats queries (cluster, start_time, hpc_user, ...)\n    27→//   - Version 11: Optimize job table indexes (reduce from ~78 to 48)\n    28→//   - Version 10: Node table\n    29→//\n    30→// Migration files are embedded at build time from the migrations directory.\n    31→const Version uint = 14\n    32→\n    33→//go:embed migrations/*\n    34→var migrationFiles embed.FS\n    35→\n    36→// checkDBVersion verifies that the database schema version matches the expected version.\n    37→// This is called automatically during Connect() to ensure schema compatibility.\n    38→//\n    39→// Returns an error if:\n    40→//   - Database version is older than expected (needs migration)\n    41→//   - Database version is newer than expected (needs app upgrade)\n    42→//   - Database is in a dirty state (failed migration)\n    43→//\n    44→// A \"dirty\" database indicates a migration was started but not completed successfully.\n    45→// This requires manual intervention to fix the database and force the version.\n    46→func checkDBVersion(db *sql.DB) error {\n    47→\tdriver, err := sqlite3.WithInstance(db, &sqlite3.Config{})\n    48→\tif err != nil {\n    49→\t\treturn err\n    50→\t}\n    51→\td, err := iofs.New(migrationFiles, \"migrations/sqlite3\")\n    52→\tif err != nil {\n    53→\t\treturn err\n    54→\t}\n    55→\n    56→\tm, err := migrate.NewWithInstance(\"iofs\", d, \"sqlite3\", driver)\n    57→\tif err != nil {\n    58→\t\treturn err\n    59→\t}\n    60→\n    61→\tv, dirty, err := m.Version()\n    62→\tif err != nil {\n    63→\t\tif err == migrate.ErrNilVersion {\n    64→\t\t\tcclog.Warn(\"Legacy database without version or missing database file!\")\n    65→\t\t} else {\n    66→\t\t\treturn err\n    67→\t\t}\n    68→\t}\n    69→\n    70→\tif v < Version {\n    71→\t\treturn fmt.Errorf(\"unsupported database version %d, need %d.\\nPlease backup your database file and run cc-backend -migrate-db\", v, Version)\n    72→\t} else if v > Version {\n    73→\t\treturn fmt.Errorf(\"unsupported database version %d, need %d.\\nPlease refer to documentation how to downgrade db with external migrate tool\", v, Version)\n    74→\t}\n    75→\n    76→\tif dirty {\n    77→\t\treturn fmt.Errorf(\"last migration to version %d has failed, please fix the db manually and force version with -force-db flag\", Version)\n    78→\t}\n    79→\n    80→\treturn nil\n    81→}\n    82→\n    83→// getMigrateInstance creates a new migration instance for the given database file.\n    84→// This is used internally by MigrateDB, RevertDB, and ForceDB.\n    85→func getMigrateInstance(db string) (m *migrate.Migrate, err error) {\n    86→\td, err := iofs.New(migrationFiles, \"migrations/sqlite3\")\n    87→\tif err != nil {\n    88→\t\treturn nil, err\n    89→\t}\n    90→\n    91→\tm, err = migrate.NewWithSourceInstance(\"iofs\", d, fmt.Sprintf(\"sqlite3://%s?_foreign_keys=on\", db))\n    92→\tif err != nil {\n    93→\t\treturn nil, err\n    94→\t}\n    95→\n    96→\treturn m, nil\n    97→}\n    98→\n    99→// MigrateDB applies all pending database migrations to bring the schema up to date.\n   100→// This should be run with the -migrate-db flag before starting the application\n   101→// after upgrading to a new version that requires schema changes.\n   102→//\n   103→// Process:\n   104→//  1. Checks current database version\n   105→//  2. Applies all migrations from current version to target Version\n   106→//  3. Updates schema_migrations table to track applied migrations\n   107→//\n   108→// Important:\n   109→//   - Always backup your database before running migrations\n   110→//   - Migrations are irreversible without manual intervention\n   111→//   - If a migration fails, the database is marked \"dirty\" and requires manual fix\n   112→//\n   113→// Usage:\n   114→//\n   115→//\tcc-backend -migrate-db\n   116→func MigrateDB(db string) error {\n   117→\tm, err := getMigrateInstance(db)\n   118→\tif err != nil {\n   119→\t\treturn err\n   120→\t}\n   121→\n   122→\tv, dirty, err := m.Version()\n   123→\tif err != nil {\n   124→\t\tif err == migrate.ErrNilVersion {\n   125→\t\t\tcclog.Info(\"Legacy database without version or missing database file!\")\n   126→\t\t} else {\n   127→\t\t\treturn err\n   128→\t\t}\n   129→\t}\n   130→\n   131→\tif v < Version {\n   132→\t\tcclog.Infof(\"unsupported database version %d, need %d.\\nPlease backup your database file and run cc-backend -migrate-db\", v, Version)\n   133→\t}\n   134→\n   135→\tif dirty {\n   136→\t\treturn fmt.Errorf(\"last migration to version %d has failed, please fix the db manually and force version with -force-db flag\", Version)\n   137→\t}\n   138→\n   139→\tif err := m.Up(); err != nil {\n   140→\t\tif err == migrate.ErrNoChange {\n   141→\t\t\tcclog.Info(\"DB already up to date!\")\n   142→\t\t} else {\n   143→\t\t\treturn err\n   144→\t\t}\n   145→\t}\n   146→\n   147→\tm.Close()\n   148→\treturn nil\n   149→}\n   150→\n   151→// RevertDB rolls back the database schema to the previous version (Version - 1).\n   152→// This is primarily used for testing or emergency rollback scenarios.\n   153→//\n   154→// Warning:\n   155→//   - This may cause data loss if newer schema added columns/tables\n   156→//   - Always backup before reverting\n   157→//   - Not all migrations are safely reversible\n   158→//\n   159→// Usage:\n   160→//\n   161→//\tcc-backend -revert-db\n   162→func RevertDB(db string) error {\n   163→\tm, err := getMigrateInstance(db)\n   164→\tif err != nil {\n   165→\t\treturn err\n   166→\t}\n   167→\n   168→\tif err := m.Migrate(Version - 1); err != nil {\n   169→\t\tif err == migrate.ErrNoChange {\n   170→\t\t\tcclog.Info(\"DB already up to date!\")\n   171→\t\t} else {\n   172→\t\t\treturn err\n   173→\t\t}\n   174→\t}\n   175→\n   176→\tm.Close()\n   177→\treturn nil\n   178→}\n   179→\n   180→// ForceDB forces the database schema version to the current Version without running migrations.\n   181→// This is only used to recover from failed migrations that left the database in a \"dirty\" state.\n   182→//\n   183→// When to use:\n   184→//   - After manually fixing a failed migration\n   185→//   - When you've manually applied schema changes and need to update the version marker\n   186→//\n   187→// Warning:\n   188→//   - This does NOT apply any schema changes\n   189→//   - Only use after manually verifying the schema is correct\n   190→//   - Improper use can cause schema/version mismatch\n   191→//\n   192→// Usage:\n   193→//\n   194→//\tcc-backend -force-db\n   195→func ForceDB(db string) error {\n   196→\tm, err := getMigrateInstance(db)\n   197→\tif err != nil {\n   198→\t\treturn err\n   199→\t}\n   200→\n   201→\tif err := m.Force(int(Version)); err != nil {\n   202→\t\treturn err\n   203→\t}\n   204→\n   205→\tm.Close()\n   206→\treturn nil\n   207→}\n   208→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"cd9dde49-eaef-42bf-ab7c-41169529cfb7","timestamp":"2026-03-13T16:11:55.966Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/internal/repository/migration.go","content":"// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n// All rights reserved. This file is part of cc-backend.\n// Use of this source code is governed by a MIT-style\n// license that can be found in the LICENSE file.\n\npackage repository\n\nimport (\n\t\"database/sql\"\n\t\"embed\"\n\t\"fmt\"\n\n\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n\t\"github.com/golang-migrate/migrate/v4\"\n\t\"github.com/golang-migrate/migrate/v4/database/sqlite3\"\n\t\"github.com/golang-migrate/migrate/v4/source/iofs\"\n)\n\n// Version is the current database schema version required by this version of cc-backend.\n// When the database schema changes, this version is incremented and a new migration file\n// is added to internal/repository/migrations/sqlite3/.\n//\n// Version history:\n//   - Version 14: Partial covering indexes for running jobs (tiny B-tree vs millions)\n//   - Version 13: Add covering indexes for status/dashboard queries (cluster, job_state, ...)\n//   - Version 12: Add covering index for stats queries (cluster, start_time, hpc_user, ...)\n//   - Version 11: Optimize job table indexes (reduce from ~78 to 48)\n//   - Version 10: Node table\n//\n// Migration files are embedded at build time from the migrations directory.\nconst Version uint = 14\n\n//go:embed migrations/*\nvar migrationFiles embed.FS\n\n// checkDBVersion verifies that the database schema version matches the expected version.\n// This is called automatically during Connect() to ensure schema compatibility.\n//\n// Returns an error if:\n//   - Database version is older than expected (needs migration)\n//   - Database version is newer than expected (needs app upgrade)\n//   - Database is in a dirty state (failed migration)\n//\n// A \"dirty\" database indicates a migration was started but not completed successfully.\n// This requires manual intervention to fix the database and force the version.\nfunc checkDBVersion(db *sql.DB) error {\n\tdriver, err := sqlite3.WithInstance(db, &sqlite3.Config{})\n\tif err != nil {\n\t\treturn err\n\t}\n\td, err := iofs.New(migrationFiles, \"migrations/sqlite3\")\n\tif err != nil {\n\t\treturn err\n\t}\n\n\tm, err := migrate.NewWithInstance(\"iofs\", d, \"sqlite3\", driver)\n\tif err != nil {\n\t\treturn err\n\t}\n\n\tv, dirty, err := m.Version()\n\tif err != nil {\n\t\tif err == migrate.ErrNilVersion {\n\t\t\tcclog.Warn(\"Legacy database without version or missing database file!\")\n\t\t} else {\n\t\t\treturn err\n\t\t}\n\t}\n\n\tif v < Version {\n\t\treturn fmt.Errorf(\"unsupported database version %d, need %d.\\nPlease backup your database file and run cc-backend -migrate-db\", v, Version)\n\t} else if v > Version {\n\t\treturn fmt.Errorf(\"unsupported database version %d, need %d.\\nPlease refer to documentation how to downgrade db with external migrate tool\", v, Version)\n\t}\n\n\tif dirty {\n\t\treturn fmt.Errorf(\"last migration to version %d has failed, please fix the db manually and force version with -force-db flag\", Version)\n\t}\n\n\treturn nil\n}\n\n// getMigrateInstance creates a new migration instance for the given database file.\n// This is used internally by MigrateDB, RevertDB, and ForceDB.\nfunc getMigrateInstance(db string) (m *migrate.Migrate, err error) {\n\td, err := iofs.New(migrationFiles, \"migrations/sqlite3\")\n\tif err != nil {\n\t\treturn nil, err\n\t}\n\n\tm, err = migrate.NewWithSourceInstance(\"iofs\", d, fmt.Sprintf(\"sqlite3://%s?_foreign_keys=on\", db))\n\tif err != nil {\n\t\treturn nil, err\n\t}\n\n\treturn m, nil\n}\n\n// MigrateDB applies all pending database migrations to bring the schema up to date.\n// This should be run with the -migrate-db flag before starting the application\n// after upgrading to a new version that requires schema changes.\n//\n// Process:\n//  1. Checks current database version\n//  2. Applies all migrations from current version to target Version\n//  3. Updates schema_migrations table to track applied migrations\n//\n// Important:\n//   - Always backup your database before running migrations\n//   - Migrations are irreversible without manual intervention\n//   - If a migration fails, the database is marked \"dirty\" and requires manual fix\n//\n// Usage:\n//\n//\tcc-backend -migrate-db\nfunc MigrateDB(db string) error {\n\tm, err := getMigrateInstance(db)\n\tif err != nil {\n\t\treturn err\n\t}\n\n\tv, dirty, err := m.Version()\n\tif err != nil {\n\t\tif err == migrate.ErrNilVersion {\n\t\t\tcclog.Info(\"Legacy database without version or missing database file!\")\n\t\t} else {\n\t\t\treturn err\n\t\t}\n\t}\n\n\tif v < Version {\n\t\tcclog.Infof(\"unsupported database version %d, need %d.\\nPlease backup your database file and run cc-backend -migrate-db\", v, Version)\n\t}\n\n\tif dirty {\n\t\treturn fmt.Errorf(\"last migration to version %d has failed, please fix the db manually and force version with -force-db flag\", Version)\n\t}\n\n\tif err := m.Up(); err != nil {\n\t\tif err == migrate.ErrNoChange {\n\t\t\tcclog.Info(\"DB already up to date!\")\n\t\t} else {\n\t\t\treturn err\n\t\t}\n\t}\n\n\tm.Close()\n\treturn nil\n}\n\n// RevertDB rolls back the database schema to the previous version (Version - 1).\n// This is primarily used for testing or emergency rollback scenarios.\n//\n// Warning:\n//   - This may cause data loss if newer schema added columns/tables\n//   - Always backup before reverting\n//   - Not all migrations are safely reversible\n//\n// Usage:\n//\n//\tcc-backend -revert-db\nfunc RevertDB(db string) error {\n\tm, err := getMigrateInstance(db)\n\tif err != nil {\n\t\treturn err\n\t}\n\n\tif err := m.Migrate(Version - 1); err != nil {\n\t\tif err == migrate.ErrNoChange {\n\t\t\tcclog.Info(\"DB already up to date!\")\n\t\t} else {\n\t\t\treturn err\n\t\t}\n\t}\n\n\tm.Close()\n\treturn nil\n}\n\n// ForceDB forces the database schema version to the current Version without running migrations.\n// This is only used to recover from failed migrations that left the database in a \"dirty\" state.\n//\n// When to use:\n//   - After manually fixing a failed migration\n//   - When you've manually applied schema changes and need to update the version marker\n//\n// Warning:\n//   - This does NOT apply any schema changes\n//   - Only use after manually verifying the schema is correct\n//   - Improper use can cause schema/version mismatch\n//\n// Usage:\n//\n//\tcc-backend -force-db\nfunc ForceDB(db string) error {\n\tm, err := getMigrateInstance(db)\n\tif err != nil {\n\t\treturn err\n\t}\n\n\tif err := m.Force(int(Version)); err != nil {\n\t\treturn err\n\t}\n\n\tm.Close()\n\treturn nil\n}\n","numLines":208,"startLine":1,"totalLines":208}},"sourceToolAssistantUUID":"317b82ee-e789-4b5f-803c-a14ae92adc7e","userType":"external","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"d7b38bc2-9c86-403c-95ee-c10284ffa933","version":"2.1.74","gitBranch":"hotfix","slug":"elegant-churning-quiche"}
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{"parentUuid":"5a05a015-d468-4a0e-9c26-145abf7dba4f","isSidechain":false,"message":{"model":"claude-sonnet-4-6","id":"msg_01Pi5G1GR6wyn7cVkw7d82aM","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_013SCWM4wnrFM55MX6DBg5C5","name":"Write","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/internal/repository/migrations/sqlite3/11_optimize-indexes.up.sql","content":"-- Migration 11: Optimize job table indexes\n-- Consolidates former migrations 11–14:\n--   - Remove overly specific sorting indexes (reduces ~78 → 48)\n--   - Add covering index for grouped stats queries\n--   - Add covering indexes for status/dashboard queries\n--   - Add partial covering indexes for running jobs (tiny B-tree)\n-- Requires ANALYZE to be run after migration (done automatically on startup).\n\n-- ============================================================\n-- Drop SELECTED existing job indexes (from migrations 08/09)\n-- sqlite_autoindex_job_1 (UNIQUE constraint) is kept automatically\n-- ============================================================\n\n-- Cluster+Partition Filter Sorting\nDROP INDEX IF EXISTS jobs_cluster_partition_numnodes;\nDROP INDEX IF EXISTS jobs_cluster_partition_numhwthreads;\nDROP INDEX IF EXISTS jobs_cluster_partition_numacc;\nDROP INDEX IF EXISTS jobs_cluster_partition_energy;\n\n-- Cluster+JobState Filter Sorting\nDROP INDEX IF EXISTS jobs_cluster_jobstate_numnodes;\nDROP INDEX IF EXISTS jobs_cluster_jobstate_numhwthreads;\nDROP INDEX IF EXISTS jobs_cluster_jobstate_numacc;\nDROP INDEX IF EXISTS jobs_cluster_jobstate_energy;\n\n-- Cluster+Shared Filter Sorting\nDROP INDEX IF EXISTS jobs_cluster_shared_numnodes;\nDROP INDEX IF EXISTS jobs_cluster_shared_numhwthreads;\nDROP INDEX IF EXISTS jobs_cluster_shared_numacc;\nDROP INDEX IF EXISTS jobs_cluster_shared_energy;\n\n-- User Filter Sorting\nDROP INDEX IF EXISTS jobs_user_numnodes;\nDROP INDEX IF EXISTS jobs_user_numhwthreads;\nDROP INDEX IF EXISTS jobs_user_numacc;\nDROP INDEX IF EXISTS jobs_user_energy;\n\n-- Project Filter Sorting\nDROP INDEX IF EXISTS jobs_project_numnodes;\nDROP INDEX IF EXISTS jobs_project_numhwthreads;\nDROP INDEX IF EXISTS jobs_project_numacc;\nDROP INDEX IF EXISTS jobs_project_energy;\n\n-- JobState Filter Sorting\nDROP INDEX IF EXISTS jobs_jobstate_numnodes;\nDROP INDEX IF EXISTS jobs_jobstate_numhwthreads;\nDROP INDEX IF EXISTS jobs_jobstate_numacc;\nDROP INDEX IF EXISTS jobs_jobstate_energy;\n\n-- Shared Filter Sorting\nDROP INDEX IF EXISTS jobs_shared_numnodes;\nDROP INDEX IF EXISTS jobs_shared_numhwthreads;\nDROP INDEX IF EXISTS jobs_shared_numacc;\nDROP INDEX IF EXISTS jobs_shared_energy;\n\n-- ArrayJob Filter\nDROP INDEX IF EXISTS jobs_cluster_arrayjobid_starttime;\n\n-- Backup Indices For High Variety Columns\nDROP INDEX IF EXISTS jobs_duration;\n\n-- ============================================================\n-- Covering indexes for grouped stats queries\n-- Column order: cluster (equality), hpc_user/project (GROUP BY), start_time (range scan)\n-- Includes aggregated columns to avoid main table lookups entirely.\n-- ============================================================\n\nCREATE INDEX IF NOT EXISTS jobs_cluster_user_starttime_stats\n  ON job (cluster, hpc_user, start_time, duration, job_state, num_nodes, num_hwthreads, num_acc);\n\nCREATE INDEX IF NOT EXISTS jobs_cluster_project_starttime_stats\n  ON job (cluster, project, start_time, duration, job_state, num_nodes, num_hwthreads, num_acc);\n\n-- ============================================================\n-- Covering indexes for status/dashboard queries\n-- Column order: cluster (equality), job_state (equality), grouping col, then aggregated columns\n-- These indexes allow the status views to be served entirely from index scans.\n-- ============================================================\n\n-- Drop 3-col indexes that are subsumed by the covering indexes below\nDROP INDEX IF EXISTS jobs_cluster_jobstate_user;\nDROP INDEX IF EXISTS jobs_cluster_jobstate_project;\n\nCREATE INDEX IF NOT EXISTS jobs_cluster_jobstate_user_stats\n  ON job (cluster, job_state, hpc_user, duration, start_time, num_nodes, num_hwthreads, num_acc);\n\nCREATE INDEX IF NOT EXISTS jobs_cluster_jobstate_project_stats\n  ON job (cluster, job_state, project, duration, start_time, num_nodes, num_hwthreads, num_acc);\n\nCREATE INDEX IF NOT EXISTS jobs_cluster_jobstate_subcluster_stats\n  ON job (cluster, job_state, subcluster, duration, start_time, num_nodes, num_hwthreads, num_acc);\n\n-- ============================================================\n-- Partial covering indexes for running jobs\n-- Only running jobs are in the B-tree, so these indexes are tiny compared to\n-- the full-table indexes above. SQLite uses them when the query contains the\n-- literal `job_state = 'running'` (not a parameter placeholder).\n-- ============================================================\n\nCREATE INDEX IF NOT EXISTS jobs_running_user_stats\n  ON job (cluster, hpc_user, num_nodes, num_hwthreads, num_acc, duration, start_time)\n  WHERE job_state = 'running';\n\nCREATE INDEX IF NOT EXISTS jobs_running_project_stats\n  ON job (cluster, project, num_nodes, num_hwthreads, num_acc, duration, start_time)\n  WHERE job_state = 'running';\n\nCREATE INDEX IF NOT EXISTS jobs_running_subcluster_stats\n  ON job (cluster, subcluster, num_nodes, num_hwthreads, num_acc, duration, start_time)\n  WHERE job_state = 'running';\n\nPRAGMA optimize;\n"},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":2659,"cache_read_input_tokens":24720,"output_tokens":1769,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":2659,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CZ1NbtR6BhL2kFwiZfUuk","type":"assistant","uuid":"6eb0ca39-dee3-4b7d-b2d7-7ec5687102ea","timestamp":"2026-03-13T16:12:23.104Z","userType":"external","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"d7b38bc2-9c86-403c-95ee-c10284ffa933","version":"2.1.74","gitBranch":"hotfix","slug":"elegant-churning-quiche"}
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{"parentUuid":"6eb0ca39-dee3-4b7d-b2d7-7ec5687102ea","isSidechain":false,"promptId":"14117c26-27b3-4724-bf43-14989ae1da46","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_013SCWM4wnrFM55MX6DBg5C5","type":"tool_result","content":"The file /Users/jan/prg/ClusterCockpit/cc-backend/internal/repository/migrations/sqlite3/11_optimize-indexes.up.sql has been updated successfully."}]},"uuid":"e2a1efb3-5003-4a0d-8d1b-1f90801ca77c","timestamp":"2026-03-13T16:12:23.117Z","toolUseResult":{"type":"update","filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/internal/repository/migrations/sqlite3/11_optimize-indexes.up.sql","content":"-- Migration 11: Optimize job table indexes\n-- Consolidates former migrations 11–14:\n--   - Remove overly specific sorting indexes (reduces ~78 → 48)\n--   - Add covering index for grouped stats queries\n--   - Add covering indexes for status/dashboard queries\n--   - Add partial covering indexes for running jobs (tiny B-tree)\n-- Requires ANALYZE to be run after migration (done automatically on startup).\n\n-- ============================================================\n-- Drop SELECTED existing job indexes (from migrations 08/09)\n-- sqlite_autoindex_job_1 (UNIQUE constraint) is kept automatically\n-- ============================================================\n\n-- Cluster+Partition Filter Sorting\nDROP INDEX IF EXISTS jobs_cluster_partition_numnodes;\nDROP INDEX IF EXISTS jobs_cluster_partition_numhwthreads;\nDROP INDEX IF EXISTS jobs_cluster_partition_numacc;\nDROP INDEX IF EXISTS jobs_cluster_partition_energy;\n\n-- Cluster+JobState Filter Sorting\nDROP INDEX IF EXISTS jobs_cluster_jobstate_numnodes;\nDROP INDEX IF EXISTS jobs_cluster_jobstate_numhwthreads;\nDROP INDEX IF EXISTS jobs_cluster_jobstate_numacc;\nDROP INDEX IF EXISTS jobs_cluster_jobstate_energy;\n\n-- Cluster+Shared Filter Sorting\nDROP INDEX IF EXISTS jobs_cluster_shared_numnodes;\nDROP INDEX IF EXISTS jobs_cluster_shared_numhwthreads;\nDROP INDEX IF EXISTS jobs_cluster_shared_numacc;\nDROP INDEX IF EXISTS jobs_cluster_shared_energy;\n\n-- User Filter Sorting\nDROP INDEX IF EXISTS jobs_user_numnodes;\nDROP INDEX IF EXISTS jobs_user_numhwthreads;\nDROP INDEX IF EXISTS jobs_user_numacc;\nDROP INDEX IF EXISTS jobs_user_energy;\n\n-- Project Filter Sorting\nDROP INDEX IF EXISTS jobs_project_numnodes;\nDROP INDEX IF EXISTS jobs_project_numhwthreads;\nDROP INDEX IF EXISTS jobs_project_numacc;\nDROP INDEX IF EXISTS jobs_project_energy;\n\n-- JobState Filter Sorting\nDROP INDEX IF EXISTS jobs_jobstate_numnodes;\nDROP INDEX IF EXISTS jobs_jobstate_numhwthreads;\nDROP INDEX IF EXISTS jobs_jobstate_numacc;\nDROP INDEX IF EXISTS jobs_jobstate_energy;\n\n-- Shared Filter Sorting\nDROP INDEX IF EXISTS jobs_shared_numnodes;\nDROP INDEX IF EXISTS jobs_shared_numhwthreads;\nDROP INDEX IF EXISTS jobs_shared_numacc;\nDROP INDEX IF EXISTS jobs_shared_energy;\n\n-- ArrayJob Filter\nDROP INDEX IF EXISTS jobs_cluster_arrayjobid_starttime;\n\n-- Backup Indices For High Variety Columns\nDROP INDEX IF EXISTS jobs_duration;\n\n-- ============================================================\n-- Covering indexes for grouped stats queries\n-- Column order: cluster (equality), hpc_user/project (GROUP BY), start_time (range scan)\n-- Includes aggregated columns to avoid main table lookups entirely.\n-- ============================================================\n\nCREATE INDEX IF NOT EXISTS jobs_cluster_user_starttime_stats\n  ON job (cluster, hpc_user, start_time, duration, job_state, num_nodes, num_hwthreads, num_acc);\n\nCREATE INDEX IF NOT EXISTS jobs_cluster_project_starttime_stats\n  ON job (cluster, project, start_time, duration, job_state, num_nodes, num_hwthreads, num_acc);\n\n-- ============================================================\n-- Covering indexes for status/dashboard queries\n-- Column order: cluster (equality), job_state (equality), grouping col, then aggregated columns\n-- These indexes allow the status views to be served entirely from index scans.\n-- ============================================================\n\n-- Drop 3-col indexes that are subsumed by the covering indexes below\nDROP INDEX IF EXISTS jobs_cluster_jobstate_user;\nDROP INDEX IF EXISTS jobs_cluster_jobstate_project;\n\nCREATE INDEX IF NOT EXISTS jobs_cluster_jobstate_user_stats\n  ON job (cluster, job_state, hpc_user, duration, start_time, num_nodes, num_hwthreads, num_acc);\n\nCREATE INDEX IF NOT EXISTS jobs_cluster_jobstate_project_stats\n  ON job (cluster, job_state, project, duration, start_time, num_nodes, num_hwthreads, num_acc);\n\nCREATE INDEX IF NOT EXISTS jobs_cluster_jobstate_subcluster_stats\n  ON job (cluster, job_state, subcluster, duration, start_time, num_nodes, num_hwthreads, num_acc);\n\n-- ============================================================\n-- Partial covering indexes for running jobs\n-- Only running jobs are in the B-tree, so these indexes are tiny compared to\n-- the full-table indexes above. 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num_hwthreads);\nCREATE INDEX IF NOT EXISTS jobs_cluster_jobstate_numacc ON job (cluster, job_state, num_acc);\nCREATE INDEX IF NOT EXISTS jobs_cluster_jobstate_energy ON job (cluster, job_state, energy);\n\n-- Cluster+Shared Filter Sorting\nCREATE INDEX IF NOT EXISTS jobs_cluster_shared_numnodes ON job (cluster, shared, num_nodes);\nCREATE INDEX IF NOT EXISTS jobs_cluster_shared_numhwthreads ON job (cluster, shared, num_hwthreads);\nCREATE INDEX IF NOT EXISTS jobs_cluster_shared_numacc ON job (cluster, shared, num_acc);\nCREATE INDEX IF NOT EXISTS jobs_cluster_shared_energy ON job (cluster, shared, energy);\n\n-- User Filter Sorting\nCREATE INDEX IF NOT EXISTS jobs_user_numnodes ON job (hpc_user, num_nodes);\nCREATE INDEX IF NOT EXISTS jobs_user_numhwthreads ON job (hpc_user, num_hwthreads);\nCREATE INDEX IF NOT EXISTS jobs_user_numacc ON job (hpc_user, num_acc);\nCREATE INDEX IF NOT EXISTS jobs_user_energy ON job (hpc_user, energy);\n\n-- Project Filter Sorting\nCREATE INDEX IF NOT 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Filter\nCREATE INDEX IF NOT EXISTS jobs_cluster_arrayjobid_starttime ON job (cluster, array_job_id, start_time);\n\n-- Backup Indices For High Variety Columns\nCREATE INDEX IF NOT EXISTS jobs_duration ON job (duration);\n\n-- Optimize DB index usage\nPRAGMA optimize;\n"},"sourceToolAssistantUUID":"82630ca2-9bc8-424b-8f3f-cb54fd9275a2","userType":"external","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"d7b38bc2-9c86-403c-95ee-c10284ffa933","version":"2.1.74","gitBranch":"hotfix","slug":"elegant-churning-quiche"}
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This file is part of cc-backend.\n// Use of this source code is governed by a MIT-style\n// license that can be found in the LICENSE file.\n\npackage repository\n\nimport (\n\t\"database/sql\"\n\t\"embed\"\n\t\"fmt\"\n\n\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n\t\"github.com/golang-migrate/migrate/v4\"\n\t\"github.com/golang-migrate/migrate/v4/database/sqlite3\"\n\t\"github.com/golang-migrate/migrate/v4/source/iofs\"\n)\n\n// Version is the current database schema version required by this version of cc-backend.\n// When the database schema changes, this version is incremented and a new migration file\n// is added to internal/repository/migrations/sqlite3/.\n//\n// Version history:\n//   - Version 14: Partial covering indexes for running jobs (tiny B-tree vs millions)\n//   - Version 13: Add covering indexes for status/dashboard queries (cluster, job_state, ...)\n//   - Version 12: Add covering index for stats queries (cluster, start_time, hpc_user, ...)\n//   - Version 11: Optimize job table indexes (reduce from ~78 to 48)\n//   - Version 10: Node table\n//\n// Migration files are embedded at build time from the migrations directory.\nconst Version uint = 14\n\n//go:embed migrations/*\nvar migrationFiles embed.FS\n\n// checkDBVersion verifies that the database schema version matches the expected version.\n// This is called automatically during Connect() to ensure schema compatibility.\n//\n// Returns an error if:\n//   - Database version is older than expected (needs migration)\n//   - Database version is newer than expected (needs app upgrade)\n//   - Database is in a dirty state (failed migration)\n//\n// A \"dirty\" database indicates a migration was started but not completed successfully.\n// This requires manual intervention to fix the database and force the version.\nfunc checkDBVersion(db *sql.DB) error {\n\tdriver, err := sqlite3.WithInstance(db, &sqlite3.Config{})\n\tif err != nil {\n\t\treturn err\n\t}\n\td, err := iofs.New(migrationFiles, \"migrations/sqlite3\")\n\tif err != nil {\n\t\treturn err\n\t}\n\n\tm, err := migrate.NewWithInstance(\"iofs\", d, \"sqlite3\", driver)\n\tif err != nil {\n\t\treturn err\n\t}\n\n\tv, dirty, err := m.Version()\n\tif err != nil {\n\t\tif err == migrate.ErrNilVersion {\n\t\t\tcclog.Warn(\"Legacy database without version or missing database file!\")\n\t\t} else {\n\t\t\treturn err\n\t\t}\n\t}\n\n\tif v < Version {\n\t\treturn fmt.Errorf(\"unsupported database version %d, need %d.\\nPlease backup your database file and run cc-backend -migrate-db\", v, Version)\n\t} else if v > Version {\n\t\treturn fmt.Errorf(\"unsupported database version %d, need %d.\\nPlease refer to documentation how to downgrade db with external migrate tool\", v, Version)\n\t}\n\n\tif dirty {\n\t\treturn fmt.Errorf(\"last migration to version %d has failed, please fix the db manually and force version with -force-db flag\", Version)\n\t}\n\n\treturn nil\n}\n\n// getMigrateInstance creates a new migration instance for the given database file.\n// This is used internally by MigrateDB, RevertDB, and ForceDB.\nfunc getMigrateInstance(db string) (m *migrate.Migrate, err error) {\n\td, err := iofs.New(migrationFiles, \"migrations/sqlite3\")\n\tif err != nil {\n\t\treturn nil, err\n\t}\n\n\tm, err = migrate.NewWithSourceInstance(\"iofs\", d, fmt.Sprintf(\"sqlite3://%s?_foreign_keys=on\", db))\n\tif err != nil {\n\t\treturn nil, err\n\t}\n\n\treturn m, nil\n}\n\n// MigrateDB applies all pending database migrations to bring the schema up to date.\n// This should be run with the -migrate-db flag before starting the application\n// after upgrading to a new version that requires schema changes.\n//\n// Process:\n//  1. Checks current database version\n//  2. Applies all migrations from current version to target Version\n//  3. Updates schema_migrations table to track applied migrations\n//\n// Important:\n//   - Always backup your database before running migrations\n//   - Migrations are irreversible without manual intervention\n//   - If a migration fails, the database is marked \"dirty\" and requires manual fix\n//\n// Usage:\n//\n//\tcc-backend -migrate-db\nfunc MigrateDB(db string) error {\n\tm, err := getMigrateInstance(db)\n\tif err != nil {\n\t\treturn err\n\t}\n\n\tv, dirty, err := m.Version()\n\tif err != nil {\n\t\tif err == migrate.ErrNilVersion {\n\t\t\tcclog.Info(\"Legacy database without version or missing database file!\")\n\t\t} else {\n\t\t\treturn err\n\t\t}\n\t}\n\n\tif v < Version {\n\t\tcclog.Infof(\"unsupported database version %d, need %d.\\nPlease backup your database file and run cc-backend -migrate-db\", v, Version)\n\t}\n\n\tif dirty {\n\t\treturn fmt.Errorf(\"last migration to version %d has failed, please fix the db manually and force version with -force-db flag\", Version)\n\t}\n\n\tif err := m.Up(); err != nil {\n\t\tif err == migrate.ErrNoChange {\n\t\t\tcclog.Info(\"DB already up to date!\")\n\t\t} else {\n\t\t\treturn err\n\t\t}\n\t}\n\n\tm.Close()\n\treturn nil\n}\n\n// RevertDB rolls back the database schema to the previous version (Version - 1).\n// This is primarily used for testing or emergency rollback scenarios.\n//\n// Warning:\n//   - This may cause data loss if newer schema added columns/tables\n//   - Always backup before reverting\n//   - Not all migrations are safely reversible\n//\n// Usage:\n//\n//\tcc-backend -revert-db\nfunc RevertDB(db string) error {\n\tm, err := getMigrateInstance(db)\n\tif err != nil {\n\t\treturn err\n\t}\n\n\tif err := m.Migrate(Version - 1); err != nil {\n\t\tif err == migrate.ErrNoChange {\n\t\t\tcclog.Info(\"DB already up to date!\")\n\t\t} else {\n\t\t\treturn err\n\t\t}\n\t}\n\n\tm.Close()\n\treturn nil\n}\n\n// ForceDB forces the database schema version to the current Version without running migrations.\n// This is only used to recover from failed migrations that left the database in a \"dirty\" state.\n//\n// When to use:\n//   - After manually fixing a failed migration\n//   - When you've manually applied schema changes and need to update the version marker\n//\n// Warning:\n//   - This does NOT apply any schema changes\n//   - Only use after manually verifying the schema is correct\n//   - Improper use can cause schema/version mismatch\n//\n// Usage:\n//\n//\tcc-backend -force-db\nfunc ForceDB(db string) error {\n\tm, err := getMigrateInstance(db)\n\tif err != nil {\n\t\treturn err\n\t}\n\n\tif err := m.Force(int(Version)); err != nil {\n\t\treturn err\n\t}\n\n\tm.Close()\n\treturn nil\n}\n","structuredPatch":[{"oldStart":21,"oldLines":14,"newStart":21,"newLines":11,"lines":[" // is added to internal/repository/migrations/sqlite3/."," //"," // Version history:","-//   - Version 14: Partial covering indexes for running jobs (tiny B-tree vs millions)","-//   - Version 13: Add covering indexes for status/dashboard queries (cluster, job_state, ...)","-//   - Version 12: Add covering index for stats queries (cluster, start_time, hpc_user, ...)","-//   - Version 11: Optimize job table indexes (reduce from ~78 to 48)","+//   - Version 11: Optimize job table indexes (reduce from ~78 to 48, add covering/partial indexes)"," //   - Version 10: Node table"," //"," // Migration files are embedded at build time from the migrations directory.","-const Version uint = 14","+const Version uint = 11"," "," //go:embed migrations/*"," var migrationFiles embed.FS"]}],"userModified":false,"replaceAll":false},"sourceToolAssistantUUID":"039f0014-b730-4628-88ce-5e8e65901a0a","userType":"external","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"d7b38bc2-9c86-403c-95ee-c10284ffa933","version":"2.1.74","gitBranch":"hotfix","slug":"elegant-churning-quiche"}
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