SQL: draft schema changes to support additional identifiers

Author: wasade

qiita_db/support_files/patches/95.sql

@@ -0,0 +1,31 @@
+-- Dec 12, 2025
+-- Adding SEQUENCEs and support tables for sample_idx, prep_sample_idx,
+-- and artifact_sample_idx
+
+CREATE SEQUENCE sequence_sample_idx AS BIGINT; 
+CREATE TABLE map_sample_idx (
+    sample_name VARCHAR NOT NULL PRIMARY KEY,
+    study_idx BIGINT NOT NULL,
+    sample_idx BIGINT DEFAULT NEXTVAL('sequence_sample_idx') NOT NULL,
+    UNIQUE (study_idx, sample_idx),
+    UNIQUE (sample_idx),
+    CONSTRAINT fk_study FOREIGN KEY (study_idx) REFERENCES qiita.study (study_id)
+);
+
+CREATE SEQUENCE sequence_prep_sample_idx AS BIGINT; 
+CREATE TABLE map_prep_sample_idx (
+    prep_sample_idx BIGINT NOT NULL PRIMARY KEY DEFAULT NEXTVAL('sequence_prep_sample_idx'),
+    prep_idx BIGINT NOT NULL,
+    sample_idx BIGINT NOT NULL,
+    UNIQUE (prep_idx, prep_sample_idx),
+    CONSTRAINT fk_prep_template FOREIGN KEY (prep_idx) REFERENCES qiita.prep_template (prep_template_id)
+);
+
+CREATE SEQUENCE sequence_artifact_sample_idx AS BIGINT; 
+CREATE TABLE map_artifact_sample_idx (
+    artifact_sample_idx BIGINT NOT NULL PRIMARY KEY DEFAULT NEXTVAL('sequence_artifact_sample_idx'),
+    artifact_idx BIGINT NOT NULL,
+    prep_sample_idx BIGINT NOT NULL,
+    UNIQUE (artifact_idx, artifact_sample_idx),
+    CONSTRAINT fk_artifact FOREIGN KEY (artifact_idx) REFERENCES qiita.artifact (artifact_id)
+);