Sub2API v1.0 - AI API 网关（二开初始版本，基于上游 Wei-Shaw/sub2api）

backend/migrations/199_channel_monitor_v2_fixed_rollups.sql

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+-- Fixed-size Channel Monitor V2 rollups for the 24h / 7d / 30d views.
+-- Source of truth remains the 1-minute passive rollup; these tables cache the
+-- UI bucket sizes so historical buckets do not need to be re-aggregated on each
+-- filter change. The background aggregator overwrites affected buckets.
+
+CREATE TABLE IF NOT EXISTS channel_monitor_v2_metrics_rollup (
+    bucket_start TIMESTAMPTZ NOT NULL,
+    bucket_seconds INTEGER NOT NULL CHECK (bucket_seconds IN (300, 3600, 43200, 86400)),
+    platform TEXT NOT NULL,
+    group_id BIGINT NOT NULL DEFAULT 0,
+    model TEXT NOT NULL,
+    success_requests BIGINT NOT NULL DEFAULT 0,
+    error_requests BIGINT NOT NULL DEFAULT 0,
+    upstream_affected_requests BIGINT NOT NULL DEFAULT 0,
+    upstream_attempt_count BIGINT NOT NULL DEFAULT 0,
+    input_tokens BIGINT NOT NULL DEFAULT 0,
+    output_tokens BIGINT NOT NULL DEFAULT 0,
+    cache_creation_tokens BIGINT NOT NULL DEFAULT 0,
+    cache_read_tokens BIGINT NOT NULL DEFAULT 0,
+    ttft_sum_ms BIGINT NOT NULL DEFAULT 0,
+    ttft_count BIGINT NOT NULL DEFAULT 0,
+    duration_sum_ms BIGINT NOT NULL DEFAULT 0,
+    duration_count BIGINT NOT NULL DEFAULT 0,
+    computed_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    PRIMARY KEY (bucket_seconds, bucket_start, platform, group_id, model)
+);
+
+CREATE INDEX IF NOT EXISTS idx_channel_monitor_v2_metrics_rollup_platform_time
+    ON channel_monitor_v2_metrics_rollup (bucket_seconds, platform, bucket_start DESC);
+CREATE INDEX IF NOT EXISTS idx_channel_monitor_v2_metrics_rollup_group_time
+    ON channel_monitor_v2_metrics_rollup (bucket_seconds, group_id, bucket_start DESC);
+CREATE INDEX IF NOT EXISTS idx_channel_monitor_v2_metrics_rollup_model_time
+    ON channel_monitor_v2_metrics_rollup (bucket_seconds, model, bucket_start DESC);
+
+CREATE TABLE IF NOT EXISTS channel_monitor_v2_user_metrics_rollup (
+    bucket_start TIMESTAMPTZ NOT NULL,
+    bucket_seconds INTEGER NOT NULL CHECK (bucket_seconds IN (300, 3600, 43200, 86400)),
+    platform TEXT NOT NULL,
+    group_id BIGINT NOT NULL DEFAULT 0,
+    model TEXT NOT NULL,
+    user_id BIGINT NOT NULL,
+    success_requests BIGINT NOT NULL DEFAULT 0,
+    error_requests BIGINT NOT NULL DEFAULT 0,
+    input_tokens BIGINT NOT NULL DEFAULT 0,
+    output_tokens BIGINT NOT NULL DEFAULT 0,
+    cache_creation_tokens BIGINT NOT NULL DEFAULT 0,
+    cache_read_tokens BIGINT NOT NULL DEFAULT 0,
+    ttft_sum_ms BIGINT NOT NULL DEFAULT 0,
+    ttft_count BIGINT NOT NULL DEFAULT 0,
+    duration_sum_ms BIGINT NOT NULL DEFAULT 0,
+    duration_count BIGINT NOT NULL DEFAULT 0,
+    computed_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    PRIMARY KEY (bucket_seconds, bucket_start, platform, group_id, model, user_id)
+);
+
+CREATE INDEX IF NOT EXISTS idx_channel_monitor_v2_user_rollup_user_time
+    ON channel_monitor_v2_user_metrics_rollup (bucket_seconds, user_id, bucket_start DESC);
+CREATE INDEX IF NOT EXISTS idx_channel_monitor_v2_user_rollup_time
+    ON channel_monitor_v2_user_metrics_rollup (bucket_seconds, bucket_start DESC);
+
+CREATE TABLE IF NOT EXISTS channel_monitor_v2_error_metrics_rollup (
+    bucket_start TIMESTAMPTZ NOT NULL,
+    bucket_seconds INTEGER NOT NULL CHECK (bucket_seconds IN (300, 3600, 43200, 86400)),
+    platform TEXT NOT NULL,
+    group_id BIGINT NOT NULL DEFAULT 0,
+    model TEXT NOT NULL,
+    error_category TEXT NOT NULL,
+    taxonomy_version SMALLINT NOT NULL,
+    error_requests BIGINT NOT NULL DEFAULT 0,
+    PRIMARY KEY (bucket_seconds, bucket_start, platform, group_id, model, error_category, taxonomy_version)
+);
+
+CREATE INDEX IF NOT EXISTS idx_channel_monitor_v2_errors_rollup_time
+    ON channel_monitor_v2_error_metrics_rollup (bucket_seconds, bucket_start DESC);
+CREATE INDEX IF NOT EXISTS idx_channel_monitor_v2_errors_rollup_category_time
+    ON channel_monitor_v2_error_metrics_rollup (bucket_seconds, error_category, bucket_start DESC);
+
+CREATE TABLE IF NOT EXISTS channel_monitor_v2_latency_histograms_rollup (
+    bucket_start TIMESTAMPTZ NOT NULL,
+    bucket_seconds INTEGER NOT NULL CHECK (bucket_seconds IN (300, 3600, 43200, 86400)),
+    platform TEXT NOT NULL,
+    group_id BIGINT NOT NULL DEFAULT 0,
+    model TEXT NOT NULL,
+    user_id BIGINT NOT NULL DEFAULT 0,
+    metric TEXT NOT NULL CHECK (metric IN ('ttft', 'duration')),
+    upper_bound_ms INTEGER NOT NULL,
+    sample_count BIGINT NOT NULL DEFAULT 0,
+    PRIMARY KEY (bucket_seconds, bucket_start, platform, group_id, model, user_id, metric, upper_bound_ms)
+);
+
+CREATE INDEX IF NOT EXISTS idx_channel_monitor_v2_histograms_rollup_time
+    ON channel_monitor_v2_latency_histograms_rollup (bucket_seconds, bucket_start DESC, metric);
+
+COMMENT ON TABLE channel_monitor_v2_metrics_rollup IS
+    'Precomputed fixed UI buckets derived from channel_monitor_v2_metrics_1m for 24h/7d/30d views.';