[parser] add from_tso function (pingcap#48)

xhebox · Oct 8, 2021 · 0caa802 · 0caa802
1 parent a18d780
commit 0caa802
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Showing 2 changed files with 6 additions and 0 deletions.
diff --git a/parser/ast/functions.go b/parser/ast/functions.go
@@ -171,6 +171,7 @@ const (
 	Year             = "year"
 	YearWeek         = "yearweek"
 	LastDay          = "last_day"
+	Tso              = "tidb_parse_tso"
 
 	// string functions
 	ASCII           = "ascii"

diff --git a/parser/parser_test.go b/parser/parser_test.go
@@ -2563,6 +2563,11 @@ func (s *testParserSuite) TestWindowFunctions(c *C) {
 		{`SELECT FIRST_VALUE(year) OVER (w ORDER BY year ASC) AS first FROM sales WINDOW w AS (PARTITION BY country);`, true},
 		{`SELECT RANK() OVER w1 FROM t WINDOW w1 AS (w2), w2 AS (), w3 AS (w1);`, true},
 		{`SELECT RANK() OVER w1 FROM t WINDOW w1 AS (w2), w2 AS (w3), w3 AS (w1);`, true},
+
+		// For tidb_parse_tso
+		{`select tidb_parse_tso(1)`, true},
+		{`select from_unixtime(404411537129996288)`, true},
+		{`select from_unixtime(404411537129996288.22)`, true},
 	}
 	s.enableWindowFunc = true
 	s.RunTest(c, table)