DB index (0xPolygonHermez#2562) (0xPolygonHermez#2570)

db/migrations/state/0010.sql

@@ -0,0 +1,5 @@
+-- +migrate Up
+CREATE INDEX IF NOT EXISTS l2block_block_hash_idx ON state.l2block (block_hash);
+
+-- +migrate Down
+DROP INDEX IF EXISTS state.l2block_block_hash_idx;

db/migrations/state/0010_test.go

@@ -0,0 +1,45 @@
+package migrations_test
+
+import (
+	"database/sql"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+// this migration changes length of the token name
+type migrationTest0010 struct{}
+
+func (m migrationTest0010) InsertData(db *sql.DB) error {
+	return nil
+}
+
+func (m migrationTest0010) RunAssertsAfterMigrationUp(t *testing.T, db *sql.DB) {
+	indexes := []string{"l2block_block_hash_idx"}
+	// Check indexes adding
+	for _, idx := range indexes {
+		// getIndex
+		const getIndex = `SELECT count(*) FROM pg_indexes WHERE indexname = $1;`
+		row := db.QueryRow(getIndex, idx)
+		var result int
+		assert.NoError(t, row.Scan(&result))
+		assert.Equal(t, 1, result)
+	}
+}
+
+func (m migrationTest0010) RunAssertsAfterMigrationDown(t *testing.T, db *sql.DB) {
+	indexes := []string{"l2block_block_hash_idx"}
+	// Check indexes removing
+	for _, idx := range indexes {
+		// getIndex
+		const getIndex = `SELECT count(*) FROM pg_indexes WHERE indexname = $1;`
+		row := db.QueryRow(getIndex, idx)
+		var result int
+		assert.NoError(t, row.Scan(&result))
+		assert.Equal(t, 0, result)
+	}
+}
+
+func TestMigration0010(t *testing.T) {
+	runMigrationTest(t, 10, migrationTest0010{})
+}