Merge pull request #388 from onc-healthit/LANTERN-729-create-script-h…

…istory-pruning-algorithm

Lantern 729 migration script for history pruning algorithm

db/migration/migrations/000029_add_info_history_pruning_metadata.down.sql

@@ -0,0 +1,5 @@
+BEGIN;
+
+DROP TABLE IF EXISTS info_history_pruning_metadata;
+
+COMMIT;

db/migration/migrations/000029_add_info_history_pruning_metadata.up.sql

@@ -0,0 +1,16 @@
+BEGIN;
+
+DROP TABLE IF EXISTS info_history_pruning_metadata;
+
+CREATE TABLE info_history_pruning_metadata (
+    id                                  SERIAL PRIMARY KEY,
+    started_on                          timestamp with time zone NOT NULL DEFAULT now(),
+    ended_on                            timestamp with time zone,
+    successful                          boolean NOT NULL DEFAULT false,
+    num_rows_processed                  integer NOT NULL DEFAULT 0,
+    num_rows_pruned                     integer NOT NULL DEFAULT 0,
+    query_int_start_date                timestamp with time zone NOT NULL,
+    query_int_end_date                  timestamp with time zone NOT NULL
+);
+
+COMMIT;