support regex

tablestore/model.go

@@ -278,12 +278,26 @@ type ColumnFilter interface {
 	ToFilter() *otsprotocol.Filter
 }
 
+type VariantType int32
+const (
+	Variant_INTEGER  VariantType = 0;
+	Variant_DOUBLE  VariantType = 1;
+	//VT_BOOLEAN = 2;
+	Variant_STRING VariantType = 3;
+)
+
+type ValueTransferRule struct {
+   Regex string
+   Cast_type VariantType
+}
+
 type SingleColumnCondition struct {
 	Comparator        *ComparatorType
 	ColumnName        *string
 	ColumnValue       interface{} //[]byte
 	FilterIfMissing   bool
 	LatestVersionOnly bool
+	TransferRule      *ValueTransferRule
 }
 
 type ReturnType int32

tablestore/otsprotocol/ots_filter.proto

@@ -1,6 +1,20 @@
 syntax = "proto2";
 package otsprotocol;
 
+enum VariantType {
+    VT_INTEGER = 0;
+    VT_DOUBLE = 1;
+    //VT_BOOLEAN = 2;
+    VT_STRING = 3;
+    VT_NULL = 6;
+    VT_BLOB = 7;
+}
+
+message ValueTransferRule {
+    required string regex = 1;
+    optional VariantType cast_type = 2;
+}
+
 enum FilterType {
     FT_SINGLE_COLUMN_VALUE = 1;
     FT_COMPOSITE_COLUMN_VALUE = 2;
@@ -22,6 +36,7 @@ message SingleColumnValueFilter {
     required bytes column_value        = 3; // Serialized SQLVariant
     required bool filter_if_missing        = 4;
     required bool latest_version_only      = 5;
+    optional ValueTransferRule value_trans_rule = 6;
 }
 
 enum LogicalOperator {