sql: fix wrong representation of SHOW JOBS

`WHEN COMPLETE` was wrongly being put in the end of the string
representation of `SHOW JOBS WHEN COMPLETE SELECT...` stmt.

Fixes: #40534.

Release note: None

pkg/sql/parser/parse_test.go

@@ -379,6 +379,8 @@ func TestParse(t *testing.T) {
 		{`EXPLAIN PAUSE JOBS SELECT a`},
 		{`SHOW JOBS SELECT a`},
 		{`EXPLAIN SHOW JOBS SELECT a`},
+		{`SHOW JOBS WHEN COMPLETE SELECT a`},
+		{`EXPLAIN SHOW JOBS WHEN COMPLETE SELECT a`},
 
 		{`EXPLAIN SELECT 1`},
 		{`EXPLAIN EXPLAIN SELECT 1`},
@@ -1765,6 +1767,8 @@ func TestParse2(t *testing.T) {
 		{`EXPLAIN PAUSE JOB a`, `EXPLAIN PAUSE JOBS VALUES (a)`},
 		{`SHOW JOB a`, `SHOW JOBS VALUES (a)`},
 		{`EXPLAIN SHOW JOB a`, `EXPLAIN SHOW JOBS VALUES (a)`},
+		{`SHOW JOB WHEN COMPLETE a`, `SHOW JOBS WHEN COMPLETE VALUES (a)`},
+		{`EXPLAIN SHOW JOB WHEN COMPLETE a`, `EXPLAIN SHOW JOBS WHEN COMPLETE VALUES (a)`},
 		{`CANCEL QUERY a`, `CANCEL QUERIES VALUES (a)`},
 		{`CANCEL QUERY IF EXISTS a`, `CANCEL QUERIES IF EXISTS VALUES (a)`},
 		{`CANCEL SESSION a`, `CANCEL SESSIONS VALUES (a)`},

pkg/sql/sem/tree/show.go

@@ -212,13 +212,13 @@ func (node *ShowJobs) Format(ctx *FmtCtx) {
 		ctx.WriteString("AUTOMATIC ")
 	}
 	ctx.WriteString("JOBS")
+	if node.Block {
+		ctx.WriteString(" WHEN COMPLETE")
+	}
 	if node.Jobs != nil {
 		ctx.WriteString(" ")
 		ctx.FormatNode(node.Jobs)
 	}
-	if node.Block {
-		ctx.WriteString(" WHEN COMPLETE")
-	}
 }
 
 // ShowSessions represents a SHOW SESSIONS statement