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- package lang
- import "strings"
- // TODO: This logic is PostgreSQL-specific and needs to be refactored to support MySQL
- func IsComparisonOperator(s string) bool {
- switch s {
- case ">":
- case "<":
- case "<=":
- case ">=":
- case "=":
- case "<>":
- case "!=":
- default:
- return false
- }
- return true
- }
- func IsMathematicalOperator(s string) bool {
- switch s {
- case "+":
- case "-":
- case "*":
- case "/":
- case "%":
- case "^":
- case "|/":
- case "||/":
- case "!":
- case "!!":
- case "@":
- case "&":
- case "|":
- case "#":
- case "~":
- case "<<":
- case ">>":
- default:
- return false
- }
- return true
- }
- // https://www.postgresql.org/docs/current/sql-keywords-appendix.html
- func IsReservedKeyword(s string) bool {
- switch strings.ToLower(s) {
- case "all":
- case "analyse":
- case "analyze":
- case "and":
- case "any":
- case "array":
- case "as":
- case "asc":
- case "asymmetric":
- case "authorization":
- case "binary":
- case "both":
- case "case":
- case "cast":
- case "check":
- case "collate":
- case "collation":
- case "column":
- case "concurrently":
- case "constraint":
- case "create":
- case "cross":
- case "current_catalog":
- case "current_date":
- case "current_role":
- case "current_schema":
- case "current_time":
- case "current_timestamp":
- case "current_user":
- case "default":
- case "deferrable":
- case "desc":
- case "distinct":
- case "do":
- case "else":
- case "end":
- case "except":
- case "false":
- case "fetch":
- case "for":
- case "foreign":
- case "freeze":
- case "from":
- case "full":
- case "grant":
- case "group":
- case "having":
- case "ilike":
- case "in":
- case "initially":
- case "inner":
- case "intersect":
- case "into":
- case "is":
- case "isnull":
- case "join":
- case "lateral":
- case "leading":
- case "left":
- case "like":
- case "limit":
- case "localtime":
- case "localtimestamp":
- case "natural":
- case "not":
- case "notnull":
- case "null":
- case "offset":
- case "on":
- case "only":
- case "or":
- case "order":
- case "outer":
- case "overlaps":
- case "placing":
- case "primary":
- case "references":
- case "returning":
- case "right":
- case "select":
- case "session_user":
- case "similar":
- case "some":
- case "symmetric":
- case "table":
- case "tablesample":
- case "then":
- case "to":
- case "trailing":
- case "true":
- case "union":
- case "unique":
- case "user":
- case "using":
- case "variadic":
- case "verbose":
- case "when":
- case "where":
- case "window":
- case "with":
- default:
- return false
- }
- return true
- }
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