feat: 实现 PostgreSQL 所有权 registry

internal/postgresql/registry/sql.go

@@ -0,0 +1,86 @@
+/*
+Copyright 2026.
+
+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.
+*/
+
+package registry
+
+var bootstrapStatements = []string{
+	`CREATE SCHEMA IF NOT EXISTS postgresql_tenant_operator`,
+	`CREATE TABLE IF NOT EXISTS postgresql_tenant_operator.schema_version (
+    singleton boolean PRIMARY KEY DEFAULT true CHECK (singleton),
+    version integer NOT NULL
+)`,
+	`INSERT INTO postgresql_tenant_operator.schema_version (singleton, version)
+VALUES (true, 1)
+ON CONFLICT (singleton) DO NOTHING`,
+	`CREATE TABLE IF NOT EXISTS postgresql_tenant_operator.tenant_ownership (
+    instance_uid text NOT NULL,
+    tenant_uid text NOT NULL,
+    tenant_namespace text NOT NULL,
+    tenant_name text NOT NULL,
+    database_name text NOT NULL,
+    role_name text NOT NULL,
+    credential_path text NOT NULL,
+    managed boolean NOT NULL DEFAULT true,
+    created_at timestamptz NOT NULL DEFAULT clock_timestamp(),
+    updated_at timestamptz NOT NULL DEFAULT clock_timestamp(),
+    retained_at timestamptz,
+    PRIMARY KEY (instance_uid, tenant_uid),
+    UNIQUE (instance_uid, tenant_namespace, tenant_name),
+    UNIQUE (instance_uid, database_name),
+    UNIQUE (instance_uid, role_name),
+    UNIQUE (credential_path),
+    CHECK (managed OR retained_at IS NOT NULL)
+)`,
+}
+
+const claimStatement = `
+INSERT INTO postgresql_tenant_operator.tenant_ownership (
+    instance_uid,
+    tenant_uid,
+    tenant_namespace,
+    tenant_name,
+    database_name,
+    role_name,
+    credential_path
+) VALUES ($1, $2, $3, $4, $5, $6, $7)
+ON CONFLICT DO NOTHING`
+
+const getByTenantUIDStatement = `
+SELECT
+    instance_uid,
+    tenant_uid,
+    tenant_namespace,
+    tenant_name,
+    database_name,
+    role_name,
+    credential_path,
+    managed,
+    created_at,
+    updated_at,
+    retained_at
+FROM postgresql_tenant_operator.tenant_ownership
+WHERE instance_uid = $1 AND tenant_uid = $2`
+
+const getByTenantUIDForUpdateStatement = getByTenantUIDStatement + ` FOR UPDATE`
+
+const markRetainedStatement = `
+UPDATE postgresql_tenant_operator.tenant_ownership
+SET managed = false, retained_at = clock_timestamp(), updated_at = clock_timestamp()
+WHERE instance_uid = $1 AND tenant_uid = $2 AND managed = true`
+
+const deleteStatement = `
+DELETE FROM postgresql_tenant_operator.tenant_ownership
+WHERE instance_uid = $1 AND tenant_uid = $2 AND managed = true`