feat: add indexes to assets and relations tables

- Index on `$.content.Name` for FQDN assets
- index on assets.type
- index on assets.last_seen
- index on relations.last_seen

Closes owasp-amass#19

migrations/postgres/005_assets_indexes.sql

@@ -0,0 +1,19 @@
+-- +migrate Up
+
+-- Index the `name` field of the `content` jsonb when type is `FQDN`
+-- Assumes the pg_trgm extension is created in the database
+CREATE INDEX idx_fqdn_content_name ON assets USING gin ((content->>'name') gin_trgm_ops) WHERE type = 'FQDN';
+
+-- Index assets.type
+CREATE INDEX idx_assets_type_hash ON assets USING hash (type);
+
+-- Index last_seen
+CREATE INDEX idx_as_last_seen ON assets (last_seen);
+
+
+-- +migrate Down
+
+-- drop all the indexes we just created
+DROP INDEX idx_fqdn_content_name;
+DROP INDEX idx_assets_type_hash;
+DROP INDEX idx_as_last_seen;

migrations/postgres/006_relations_indexes.sql

@@ -0,0 +1,7 @@
+-- +migrate Up
+
+CREATE INDEX idx_rel_last_seen ON assets (last_seen);
+
+-- +migrate Down
+
+DROP INDEX idx_rel_last_seen;

migrations/sqlite3/004_assets_indexes.sql

@@ -0,0 +1,19 @@
+-- +migrate Up
+
+-- Index the `name` field of the `content` jsonb when type is `FQDN`
+-- Assumes the pg_trgm extension is created in the database
+CREATE INDEX fqdn_name ON assets (content->>'name' COLLATE NOCASE) WHERE type = 'FQDN';
+
+-- Index assets.type
+CREATE INDEX idx_assets_type ON assets (type);
+
+-- Index last_seen
+CREATE INDEX idx_as_last_seen ON assets (last_seen);
+
+
+-- +migrate Down
+
+-- drop all the indexes we just created
+DROP INDEX idx_fqdn_content_name;
+DROP INDEX idx_assets_type_hash;
+DROP INDEX idx_as_last_seen;

migrations/sqlite3/005_relations_indexes.sql

@@ -0,0 +1,7 @@
+-- +migrate Up
+
+CREATE INDEX idx_rel_last_seen ON assets (last_seen);
+
+-- +migrate Down
+
+DROP INDEX idx_rel_last_seen;