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src/providers/mssql/queries/healthcheck.js

@@ -0,0 +1,19 @@
+export const ENSURE_ROW = `
+IF NOT EXISTS (SELECT 1 FROM healthcheck)
+BEGIN
+    INSERT INTO healthcheck ([sequence]) VALUES (0);
+END
+`;
+
+export const SELECT_FOR_UPDATE = `
+SELECT TOP 1 id, [sequence]
+FROM healthcheck WITH (UPDLOCK, ROWLOCK)
+ORDER BY id ASC;
+`;
+
+export const UPDATE_SEQUENCE = `
+UPDATE healthcheck
+SET [sequence] = @sequence,
+    updated_at = SYSUTCDATETIME()
+WHERE id = @id;
+`;