Function extractTableExpr

backend/plugin/parser/mysql/resource_change.go:192–208

extractTableExpr recursively extracts schema resources from a single TableExpr.

(expr ast.TableExpr, defaultDB string)

// extractTableExpr recursively extracts schema resources from a single TableExpr.
func extractTableExpr(expr ast.TableExpr, defaultDB string) []base.SchemaResource {
	if expr == nil {
		return nil
	}
	switch n := expr.(type) {
	case *ast.TableRef:
		db, table := omniTableRef(n, defaultDB)
		return []base.SchemaResource{{Database: db, Table: table}}
	case *ast.JoinClause:
		var res []base.SchemaResource
		res = append(res, extractTableExpr(n.Left, defaultDB)...)
		res = append(res, extractTableExpr(n.Right, defaultDB)...)
		return res
	default:
		return nil
	}
}

// omniStatementText returns the text of a statement, ensuring it ends with a semicolon.
func omniStatementText(a *OmniAST) string {