переписана реализация scd2

2025-12-21 18:50:50 +03:00
parent 87301921a9
commit ae00475df5
15 changed files with 205 additions and 183 deletions
@@ -34,10 +34,15 @@ CREATE TABLE dds.dim_customer_status (
    customer_bk        INT         NOT NULL,
    status             VARCHAR(20) NOT NULL,
    hashdiff           TEXT        NOT NULL,
-    valid_from         TIMESTAMP   NOT NULL,
-    valid_to           TIMESTAMP   NOT NULL,
-    is_current         BOOLEAN     NOT NULL DEFAULT TRUE,
+    valid_from         DATE        NOT NULL,
+    valid_to           DATE,
    created_at         TIMESTAMP   NOT NULL DEFAULT NOW(),
    updated_at         TIMESTAMP   NOT NULL DEFAULT NOW()
 );

+ALTER TABLE dds.dim_customer_status
+    ADD CONSTRAINT uq_dim_customer_status_bk_from UNIQUE (customer_bk, valid_from);
+
+CREATE INDEX ix_dim_customer_status_bk_current
+    ON dds.dim_customer_status (customer_bk)
+    WHERE valid_to IS NULL;