#2035: PG data model and functions for Dataset

* First commit

database/src/main/dataset/_.ddl

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+/*
+ * Copyright 2018 ABSA Group Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+CREATE SCHEMA IF NOT EXISTS dataset;
+ALTER  SCHEMA dataset OWNER TO enceladus;
+
+GRANT USAGE ON SCHEMA dataset TO menas;

database/src/main/dataset/entities.ddl

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+/*
+ * Copyright 2018 ABSA Group Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+-- DROP TABLE IF EXISTS dataset.entities;
+
+CREATE TABLE dataset.entities
+(
+    entity_type             CHAR NOT NULL DEFAULT 'D',
+    CONSTRAINT entities_pk PRIMARY KEY (entity_name)
+)
+    INHERITS (entity_base.entities);
+
+ALTER TABLE IF EXISTS dataset.entities
+    ADD CONSTRAINT check_dataset_entity_type CHECK (entity_type = 'D')
+    NOT VALID;
+
+ALTER TABLE dataset.entities OWNER to enceladus;

database/src/main/dataset/list.sql

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+/*
+ * Copyright 2018 ABSA Group Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+CREATE OR REPLACE FUNCTION dataset.list(
+    IN  i_include_disabled      BOOLEAN DEFAULT FALSE,
+    OUT entity_name             TEXT,
+    OUT entity_latest_version   INTEGER,
+    OUT locked                  BOOLEAN,
+    OUT disabled                BOOLEAN
+) RETURNS SETOF record AS
+$$
+-------------------------------------------------------------------------------
+--
+-- Function: dataset.list(1)
+--      Returns a list of schemas with their latest versions
+--
+-- Parameters:
+--      i_include_disabled       - flag indicating if to include disabled schemas too
+--
+-- Returns:
+--      entity_name             - name of the schema
+--      entity_latest_version   - the latest version of the schema
+--      locked                  - signals if the schema is locked or not
+--      disabled                - signals if the schema is disabled or not
+--
+-------------------------------------------------------------------------------
+DECLARE
+BEGIN
+    RETURN QUERY
+    SELECT E.entity_name, E.entity_latest_version, E.disabled_at IS NOT NULL, E.locked_at IS NOT NULL
+    FROM dataset.entities E
+    WHERE i_include_disabled OR E.disabled_at IS NULL
+    ORDER BY entity_name; --TODO Include order by?
+END;
+$$
+LANGUAGE plpgsql VOLATILE SECURITY DEFINER;
+
+ALTER FUNCTION dataset.list(BOOLEAN) OWNER TO enceladus;
+GRANT EXECUTE ON FUNCTION dataset.list(BOOLEAN) TO menas;

database/src/main/dataset/versions.ddl

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+/*
+ * Copyright 2018 ABSA Group Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+-- DROP TABLE IF EXISTS dataset.versions;
+
+CREATE TABLE dataset.versions
+(
+    source_path     TEXT,
+    publish_path    TEXT,
+    CONSTRAINT versions_pk PRIMARY KEY (id_entity_version)
+)
+    INHERITS (entity_base.versions);
+
+ALTER TABLE dataset.versions
+    ADD CONSTRAINT versions_unq UNIQUE (entity_name, entity_version);
+
+ALTER TABLE dataset.versions OWNER to enceladus;