fix(mysql): resolve lint issues in reader and writer

pkg/readers/mysql/reader.go

@@ -73,6 +73,7 @@ func (r *Reader) ReadDatabase() (*models.Database, error) {
 	}
 	return db, nil
 }
+
 func (r *Reader) ReadSchema() (*models.Schema, error) {
 	db, err := r.ReadDatabase()
 	if err != nil {
@@ -83,6 +84,7 @@ func (r *Reader) ReadSchema() (*models.Schema, error) {
 	}
 	return db.Schemas[0], nil
 }
+
 func (r *Reader) ReadTable() (*models.Table, error) {
 	s, err := r.ReadSchema()
 	if err != nil {
@@ -93,6 +95,7 @@ func (r *Reader) ReadTable() (*models.Table, error) {
 	}
 	return s.Tables[0], nil
 }
+
 func (r *Reader) connect() error {
 	db, err := sql.Open("mysql", r.options.ConnectionString)
 	if err != nil {
@@ -105,6 +108,7 @@ func (r *Reader) connect() error {
 	r.db = db
 	return nil
 }
+
 func (r *Reader) close() {
 	if r.db != nil {
 		_ = r.db.Close()
@@ -128,6 +132,7 @@ func (r *Reader) querySchemas(current string) ([]*models.Schema, error) {
 	}
 	return out, rows.Err()
 }
+
 func (r *Reader) queryTables(schema string) ([]*models.Table, error) {
 	rows, err := r.db.QueryContext(r.ctx, "SELECT TABLE_NAME FROM information_schema.TABLES WHERE TABLE_SCHEMA = ? AND TABLE_TYPE = 'BASE TABLE' ORDER BY TABLE_NAME", schema)
 	if err != nil {
@@ -144,6 +149,7 @@ func (r *Reader) queryTables(schema string) ([]*models.Table, error) {
 	}
 	return out, rows.Err()
 }
+
 func (r *Reader) queryColumns(schema, table string) (map[string]*models.Column, error) {
 	rows, err := r.db.QueryContext(r.ctx, `SELECT COLUMN_NAME, COLUMN_TYPE, IS_NULLABLE, COLUMN_DEFAULT, ORDINAL_POSITION, EXTRA, COLUMN_COMMENT FROM information_schema.COLUMNS WHERE TABLE_SCHEMA = ? AND TABLE_NAME = ? ORDER BY ORDINAL_POSITION`, schema, table)
 	if err != nil {
@@ -171,6 +177,7 @@ func (r *Reader) queryColumns(schema, table string) (map[string]*models.Column,
 	}
 	return out, rows.Err()
 }
+
 func (r *Reader) queryConstraints(schema, table string) (map[string]*models.Constraint, error) {
 	rows, err := r.db.QueryContext(r.ctx, `SELECT CONSTRAINT_NAME, CONSTRAINT_TYPE, COLUMN_NAME, REFERENCED_TABLE_SCHEMA, REFERENCED_TABLE_NAME, REFERENCED_COLUMN_NAME, ORDINAL_POSITION FROM information_schema.KEY_COLUMN_USAGE k JOIN information_schema.TABLE_CONSTRAINTS t USING (CONSTRAINT_SCHEMA, TABLE_NAME, CONSTRAINT_NAME) WHERE k.TABLE_SCHEMA=? AND k.TABLE_NAME=? ORDER BY CONSTRAINT_NAME, ORDINAL_POSITION`, schema, table)
 	if err != nil {
@@ -207,6 +214,7 @@ func (r *Reader) queryConstraints(schema, table string) (map[string]*models.Cons
 	}
 	return out, rows.Err()
 }
+
 func (r *Reader) queryIndexes(schema, table string) (map[string]*models.Index, error) {
 	rows, err := r.db.QueryContext(r.ctx, `SELECT INDEX_NAME, NON_UNIQUE, COLUMN_NAME, SEQ_IN_INDEX, INDEX_TYPE FROM information_schema.STATISTICS WHERE TABLE_SCHEMA=? AND TABLE_NAME=? AND INDEX_NAME <> 'PRIMARY' ORDER BY INDEX_NAME, SEQ_IN_INDEX`, schema, table)
 	if err != nil {
@@ -231,6 +239,7 @@ func (r *Reader) queryIndexes(schema, table string) (map[string]*models.Index, e
 	}
 	return out, rows.Err()
 }
+
 func (r *Reader) deriveRelationship(t *models.Table, c *models.Constraint) {
 	n := fmt.Sprintf("%s_to_%s", t.Name, c.ReferencedTable)
 	rel := models.InitRelationship(n, models.OneToMany)