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filter_exact.go
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/
filter_exact.go
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package logstorage
import (
"fmt"
"math"
"sync"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/encoding"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/logger"
)
// filterExact matches the exact value.
//
// Example LogsQL: `fieldName:exact("foo bar")`
type filterExact struct {
fieldName string
value string
tokensOnce sync.Once
tokens []string
}
func (fe *filterExact) String() string {
return fmt.Sprintf("%sexact(%s)", quoteFieldNameIfNeeded(fe.fieldName), quoteTokenIfNeeded(fe.value))
}
func (fe *filterExact) getTokens() []string {
fe.tokensOnce.Do(fe.initTokens)
return fe.tokens
}
func (fe *filterExact) initTokens() {
fe.tokens = tokenizeStrings(nil, []string{fe.value})
}
func (fe *filterExact) apply(bs *blockSearch, bm *bitmap) {
fieldName := fe.fieldName
value := fe.value
v := bs.csh.getConstColumnValue(fieldName)
if v != "" {
if value != v {
bm.resetBits()
}
return
}
// Verify whether filter matches other columns
ch := bs.csh.getColumnHeader(fieldName)
if ch == nil {
// Fast path - there are no matching columns.
// It matches anything only for empty value.
if value != "" {
bm.resetBits()
}
return
}
tokens := fe.getTokens()
switch ch.valueType {
case valueTypeString:
matchStringByExactValue(bs, ch, bm, value, tokens)
case valueTypeDict:
matchValuesDictByExactValue(bs, ch, bm, value)
case valueTypeUint8:
matchUint8ByExactValue(bs, ch, bm, value, tokens)
case valueTypeUint16:
matchUint16ByExactValue(bs, ch, bm, value, tokens)
case valueTypeUint32:
matchUint32ByExactValue(bs, ch, bm, value, tokens)
case valueTypeUint64:
matchUint64ByExactValue(bs, ch, bm, value, tokens)
case valueTypeFloat64:
matchFloat64ByExactValue(bs, ch, bm, value, tokens)
case valueTypeIPv4:
matchIPv4ByExactValue(bs, ch, bm, value, tokens)
case valueTypeTimestampISO8601:
matchTimestampISO8601ByExactValue(bs, ch, bm, value, tokens)
default:
logger.Panicf("FATAL: %s: unknown valueType=%d", bs.partPath(), ch.valueType)
}
}
func matchTimestampISO8601ByExactValue(bs *blockSearch, ch *columnHeader, bm *bitmap, value string, tokens []string) {
n, ok := tryParseTimestampISO8601(value)
if !ok || n < int64(ch.minValue) || n > int64(ch.maxValue) {
bm.resetBits()
return
}
bb := bbPool.Get()
bb.B = encoding.MarshalUint64(bb.B, uint64(n))
matchBinaryValue(bs, ch, bm, bb.B, tokens)
bbPool.Put(bb)
}
func matchIPv4ByExactValue(bs *blockSearch, ch *columnHeader, bm *bitmap, value string, tokens []string) {
n, ok := tryParseIPv4(value)
if !ok || uint64(n) < ch.minValue || uint64(n) > ch.maxValue {
bm.resetBits()
return
}
bb := bbPool.Get()
bb.B = encoding.MarshalUint32(bb.B, n)
matchBinaryValue(bs, ch, bm, bb.B, tokens)
bbPool.Put(bb)
}
func matchFloat64ByExactValue(bs *blockSearch, ch *columnHeader, bm *bitmap, value string, tokens []string) {
f, ok := tryParseFloat64(value)
if !ok || f < math.Float64frombits(ch.minValue) || f > math.Float64frombits(ch.maxValue) {
bm.resetBits()
return
}
n := math.Float64bits(f)
bb := bbPool.Get()
bb.B = encoding.MarshalUint64(bb.B, n)
matchBinaryValue(bs, ch, bm, bb.B, tokens)
bbPool.Put(bb)
}
func matchValuesDictByExactValue(bs *blockSearch, ch *columnHeader, bm *bitmap, value string) {
bb := bbPool.Get()
for i, v := range ch.valuesDict.values {
if v == value {
bb.B = append(bb.B, byte(i))
}
}
matchEncodedValuesDict(bs, ch, bm, bb.B)
bbPool.Put(bb)
}
func matchStringByExactValue(bs *blockSearch, ch *columnHeader, bm *bitmap, value string, tokens []string) {
if !matchBloomFilterAllTokens(bs, ch, tokens) {
bm.resetBits()
return
}
visitValues(bs, ch, bm, func(v string) bool {
return v == value
})
}
func matchUint8ByExactValue(bs *blockSearch, ch *columnHeader, bm *bitmap, phrase string, tokens []string) {
n, ok := tryParseUint64(phrase)
if !ok || n < ch.minValue || n > ch.maxValue {
bm.resetBits()
return
}
bb := bbPool.Get()
bb.B = append(bb.B, byte(n))
matchBinaryValue(bs, ch, bm, bb.B, tokens)
bbPool.Put(bb)
}
func matchUint16ByExactValue(bs *blockSearch, ch *columnHeader, bm *bitmap, phrase string, tokens []string) {
n, ok := tryParseUint64(phrase)
if !ok || n < ch.minValue || n > ch.maxValue {
bm.resetBits()
return
}
bb := bbPool.Get()
bb.B = encoding.MarshalUint16(bb.B, uint16(n))
matchBinaryValue(bs, ch, bm, bb.B, tokens)
bbPool.Put(bb)
}
func matchUint32ByExactValue(bs *blockSearch, ch *columnHeader, bm *bitmap, phrase string, tokens []string) {
n, ok := tryParseUint64(phrase)
if !ok || n < ch.minValue || n > ch.maxValue {
bm.resetBits()
return
}
bb := bbPool.Get()
bb.B = encoding.MarshalUint32(bb.B, uint32(n))
matchBinaryValue(bs, ch, bm, bb.B, tokens)
bbPool.Put(bb)
}
func matchUint64ByExactValue(bs *blockSearch, ch *columnHeader, bm *bitmap, phrase string, tokens []string) {
n, ok := tryParseUint64(phrase)
if !ok || n < ch.minValue || n > ch.maxValue {
bm.resetBits()
return
}
bb := bbPool.Get()
bb.B = encoding.MarshalUint64(bb.B, n)
matchBinaryValue(bs, ch, bm, bb.B, tokens)
bbPool.Put(bb)
}
func matchBinaryValue(bs *blockSearch, ch *columnHeader, bm *bitmap, binValue []byte, tokens []string) {
if !matchBloomFilterAllTokens(bs, ch, tokens) {
bm.resetBits()
return
}
visitValues(bs, ch, bm, func(v string) bool {
return v == string(binValue)
})
}