mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-11-21 14:44:00 +00:00
78 lines
2.1 KiB
Go
78 lines
2.1 KiB
Go
package logsql
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import (
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"context"
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"net/http"
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"github.com/VictoriaMetrics/VictoriaMetrics/app/vlstorage"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/flagutil"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/httpserver"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/httputils"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/logstorage"
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)
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var (
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maxSortBufferSize = flagutil.NewBytes("select.maxSortBufferSize", 1024*1024, "Query results from /select/logsql/query are automatically sorted by _time "+
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"if their summary size doesn't exceed this value; otherwise, query results are streamed in the response without sorting; "+
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"too big value for this flag may result in high memory usage since the sorting is performed in memory")
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)
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// ProcessQueryRequest handles /select/logsql/query request.
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func ProcessQueryRequest(ctx context.Context, w http.ResponseWriter, r *http.Request) {
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// Extract tenantID
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tenantID, err := logstorage.GetTenantIDFromRequest(r)
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if err != nil {
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httpserver.Errorf(w, r, "%s", err)
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return
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}
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limit, err := httputils.GetInt(r, "limit")
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if err != nil {
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httpserver.Errorf(w, r, "%s", err)
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return
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}
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qStr := r.FormValue("query")
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q, err := logstorage.ParseQuery(qStr)
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if err != nil {
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httpserver.Errorf(w, r, "cannot parse query [%s]: %s", qStr, err)
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return
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}
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w.Header().Set("Content-Type", "application/stream+json; charset=utf-8")
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sw := getSortWriter()
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sw.Init(w, maxSortBufferSize.IntN(), limit)
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tenantIDs := []logstorage.TenantID{tenantID}
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ctxWithCancel, cancel := context.WithCancel(ctx)
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defer cancel()
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writeBlock := func(_ uint, timestamps []int64, columns []logstorage.BlockColumn) {
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if len(columns) == 0 {
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return
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}
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bb := blockResultPool.Get()
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for i := range timestamps {
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WriteJSONRow(bb, columns, i)
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}
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if !sw.TryWrite(bb.B) {
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cancel()
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}
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blockResultPool.Put(bb)
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}
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err = vlstorage.RunQuery(ctxWithCancel, tenantIDs, q, writeBlock)
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sw.FinalFlush()
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putSortWriter(sw)
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if err != nil {
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httpserver.Errorf(w, r, "cannot execute query [%s]: %s", qStr, err)
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}
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}
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var blockResultPool bytesutil.ByteBufferPool
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