fix poe_id to varchar(25)

Author: alistairewj

mimic-iv/buildmimic/duckdb/import_duckdb.sh

@@ -378,7 +378,7 @@ CREATE TABLE mimic_hosp.prescriptions
   subject_id INTEGER NOT NULL,
   hadm_id INTEGER NOT NULL,
   pharmacy_id INTEGER NOT NULL,
-  poe_id INTEGER,
+  poe_id VARCHAR(25),
   poe_seq INTEGER,
   starttime TIMESTAMP,
   stoptime TIMESTAMP,

mimic-iv/buildmimic/mysql/load.sql

@@ -860,7 +860,7 @@ CREATE TABLE prescriptions (	-- rows=17021399
    subject_id INT UNSIGNED NOT NULL,
    hadm_id INT UNSIGNED NOT NULL,
    pharmacy_id INT UNSIGNED NOT NULL,
-   poe_id INT UNSIGNED,
+   poe_id  VARCHAR(25),
    poe_seq INT UNSIGNED,
    starttime DATETIME,
    stoptime DATETIME,