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Aliaksandr Valialkin 2024-05-17 14:44:47 +02:00
parent d08dfd8752
commit 306d6e4f6d
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1 changed files with 19 additions and 7 deletions
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26
lib/logstorage/block_result.go
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@ -63,12 +63,18 @@ func (br *blockResult) reset() {
br.csInitialized = false
}
// clone returns a clone of br, which owns its own memory.
// clone returns a clone of br, which owns its own data.
func (br *blockResult) clone() *blockResult {
brNew := &blockResult{}
cs := br.getColumns()
// Pre-populate valuesEncoded in every column in order to properly calculate the needed backing buffer size below.
for _, c := range cs {
_ = c.getValuesEncoded(br)
}
// Calculate the backing buffer size needed for cloning column values.
bufLen := 0
for _, c := range cs {
bufLen += c.neededBackingBufLen()
@ -1423,7 +1429,9 @@ type blockResultColumn struct {
// clone returns a clone of c backed by data from br.
//
// the clone is valid until br is reset.
// It is expected that c.valuesEncoded is already initialized for non-time column.
//
// The clone is valid until br is reset.
func (c *blockResultColumn) clone(br *blockResult) blockResultColumn {
var cNew blockResultColumn
@ -1436,13 +1444,19 @@ func (c *blockResultColumn) clone(br *blockResult) blockResultColumn {
cNew.maxValue = c.maxValue
cNew.dictValues = br.cloneValues(c.dictValues)
if !c.isTime && c.valuesEncoded == nil {
logger.Panicf("BUG: valuesEncoded must be non-nil for non-time column %q; isConst=%v; valueType=%d", c.name, c.isConst, c.valueType)
}
cNew.valuesEncoded = br.cloneValues(c.valuesEncoded)
if c.valueType != valueTypeString {
cNew.values = br.cloneValues(c.values)
}
cNew.valuesBucketed = br.cloneValues(c.valuesBucketed)
cNew.newValuesEncodedFunc = c.newValuesEncodedFunc
// Do not copy c.newValuesEncodedFunc, since it may refer to data, which may change over time.
// We already copied c.valuesEncoded, so cNew.newValuesEncodedFunc must be nil.
cNew.bucketSizeStr = c.bucketSizeStr
cNew.bucketOffsetStr = c.bucketOffsetStr
@ -1535,11 +1549,9 @@ func (c *blockResultColumn) getValuesEncoded(br *blockResult) []string {
return nil
}
if values := c.valuesEncoded; values != nil {
return values
if c.valuesEncoded == nil {
c.valuesEncoded = c.newValuesEncodedFunc(br)
}
c.valuesEncoded = c.newValuesEncodedFunc(br)
return c.valuesEncoded
}