*: add table option: pre_split_regions (#287) (#359)

pingcap · Jun 19, 2019 · b634efe · b634efe
1 parent d4cf758
commit b634efe
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Showing 6 changed files with 4,699 additions and 4,676 deletions.
diff --git a/ast/ddl.go b/ast/ddl.go
@@ -675,6 +675,7 @@ const (
 	TableOptionRowFormat
 	TableOptionStatsPersistent
 	TableOptionShardRowID
+	TableOptionPreSplitRegion
 	TableOptionPackKeys
 )
 

diff --git a/misc.go b/misc.go
@@ -399,6 +399,7 @@ var tokenMap = map[string]int{
 	"QUERIES":                  queries,
 	"QUICK":                    quick,
 	"SHARD_ROW_ID_BITS":        shardRowIDBits,
+	"PRE_SPLIT_REGIONS":        preSplitRegions,
 	"RANGE":                    rangeKwd,
 	"RECOVER":                  recover,
 	"READ":                     read,

diff --git a/model/model.go b/model/model.go
@@ -219,6 +219,10 @@ type TableInfo struct {
 	ShardRowIDBits uint64
 	// MaxShardRowIDBits uses to record the max ShardRowIDBits be used so far.
 	MaxShardRowIDBits uint64 `json:"max_shard_row_id_bits"`
+	// PreSplitRegions specify the pre-split region when create table.
+	// The pre-split region num is 2^(PreSplitRegions-1).
+	// And the PreSplitRegions should less than or equal to ShardRowIDBits.
+	PreSplitRegions uint64 `json:"pre_split_regions"`
 
 	Partition *PartitionInfo `json:"partition"`