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-rw-r--r--src/main/resources/db/specific/h2/V1.27__followers_unique.sql1
-rw-r--r--src/main/resources/db/specific/mariadb/V1.27__followers_unique.sql1
-rw-r--r--src/main/resources/db/specific/postgresql/V1.27__followers_unique.sql4
3 files changed, 6 insertions, 0 deletions
diff --git a/src/main/resources/db/specific/h2/V1.27__followers_unique.sql b/src/main/resources/db/specific/h2/V1.27__followers_unique.sql
new file mode 100644
index 00000000..e103d1a0
--- /dev/null
+++ b/src/main/resources/db/specific/h2/V1.27__followers_unique.sql
@@ -0,0 +1 @@
+ALTER TABLE followers ADD UNIQUE (user_id, acct) \ No newline at end of file
diff --git a/src/main/resources/db/specific/mariadb/V1.27__followers_unique.sql b/src/main/resources/db/specific/mariadb/V1.27__followers_unique.sql
new file mode 100644
index 00000000..e103d1a0
--- /dev/null
+++ b/src/main/resources/db/specific/mariadb/V1.27__followers_unique.sql
@@ -0,0 +1 @@
+ALTER TABLE followers ADD UNIQUE (user_id, acct) \ No newline at end of file
diff --git a/src/main/resources/db/specific/postgresql/V1.27__followers_unique.sql b/src/main/resources/db/specific/postgresql/V1.27__followers_unique.sql
new file mode 100644
index 00000000..5a15d9ae
--- /dev/null
+++ b/src/main/resources/db/specific/postgresql/V1.27__followers_unique.sql
@@ -0,0 +1,4 @@
+DELETE
+FROM followers A USING followers B
+WHERE A.user_id=B.user_id AND A.ts<=B.ts AND A.acct=B.acct AND A.ctid<B.ctid;
+ALTER TABLE followers ADD UNIQUE (user_id, acct) \ No newline at end of file