add is_hidden support for information_schema_source for v2

v2/Makefile

@@ -73,4 +73,4 @@ check-diff:
 		echo "--- Actual Files ---" ; \
 		echo "$$ACTUAL_FILES" ; \
 		exit 1 ; \
-	fi
+	fi

v2/loader/information_schema_source.go

@@ -90,7 +90,8 @@ func (s *informationSchemaSource) ColumnList(table string) ([]*SpannerColumn, er
 		`  AND ic.COLUMN_NAME = c.COLUMN_NAME` +
 		`  AND ic.INDEX_NAME = "PRIMARY_KEY" ` +
 		`) IS_PRIMARY_KEY, ` +
-		`IS_GENERATED = "ALWAYS" AS IS_GENERATED ` +
+		`IS_GENERATED = "ALWAYS" AS IS_GENERATED, ` +
+		`c.IS_HIDDEN ` +
 		`FROM INFORMATION_SCHEMA.COLUMNS c ` +
 		`WHERE c.TABLE_SCHEMA = "" AND c.TABLE_NAME = @table ` +
 		`ORDER BY c.ORDINAL_POSITION`
@@ -136,6 +137,9 @@ func (s *informationSchemaSource) ColumnList(table string) ([]*SpannerColumn, er
 		if err := row.ColumnByName("IS_GENERATED", &c.IsGenerated); err != nil {
 			return nil, err
 		}
+		if err := row.ColumnByName("IS_HIDDEN", &c.IsHidden); err != nil {
+			return nil, err
+		}
 
 		res = append(res, &c)
 	}

v2/test/testdata/schema.sql

@@ -171,3 +171,9 @@ CREATE TABLE Inflectionzz (
   X STRING(32) NOT NULL,
   Y STRING(32) NOT NULL,
 ) PRIMARY KEY(X);
+
+CREATE TABLE FullTextSearch (
+  ID INT64 NOT NULL,
+  Content STRING(2048) NOT NULL,
+  Content_Tokens TOKENLIST AS (TOKENIZE_FULLTEXT(Content)) HIDDEN,
+) PRIMARY KEY(ID);

v2/test/testmodels/dump_types/full_text_search.txt

@@ -0,0 +1,12 @@
+# Field list of FullTextSearch
+
+* ID INT64 int64
+* Content STRING(2048) string
+* ContentTokens TOKENLIST TOKENLIST
+
+# Primary Key
+
+* ID INT64 int64
+
+# Index list of FullTextSearch
+