Moves studio specific SQL queries out of pg-meta into studio itself

apps/studio/data/database/database.sql.ts

@@ -18,3 +18,24 @@ export const getLiveTupleEstimateKey = (
   table: string,
   schema = 'public'
 ) => sqlKeys.query(projectRef, ['live-tuple-estimate', schema, table])
+
+export const getCheckPrimaryKeysExistsSQL = (tables: { name: string; schema: string }[]) => {
+  const formattedTables = tables.map((table) => `'${table.schema}.${table.name}'`).join(',')
+
+  return /* SQL */ `
+WITH targets(rel) AS (
+  SELECT unnest(ARRAY[${formattedTables}]::regclass[])
+)
+SELECT
+  c.oid AS id,
+  n.nspname AS schema,
+  c.relname AS name,
+  (con.conrelid IS NOT NULL) AS has_primary_key
+FROM targets t
+JOIN pg_class c ON c.oid = t.rel
+JOIN pg_namespace n ON n.oid = c.relnamespace
+LEFT JOIN pg_constraint con
+  ON con.conrelid = c.oid AND con.contype = 'p'
+ORDER BY n.nspname, c.relname;
+`
+}