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437 lines
11 KiB
437 lines
11 KiB
// Copyright 2015 The Xorm Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package xorm
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import (
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"database/sql"
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"errors"
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"fmt"
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"regexp"
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"strings"
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"github.com/go-xorm/core"
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)
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// func init() {
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// RegisterDialect("sqlite3", &sqlite3{})
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// }
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var (
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sqlite3ReservedWords = map[string]bool{
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"ABORT": true,
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"ACTION": true,
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"ADD": true,
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"AFTER": true,
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"ALL": true,
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"ALTER": true,
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"ANALYZE": true,
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"AND": true,
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"AS": true,
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"ASC": true,
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"ATTACH": true,
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"AUTOINCREMENT": true,
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"BEFORE": true,
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"BEGIN": true,
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"BETWEEN": true,
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"BY": true,
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"CASCADE": true,
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"CASE": true,
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"CAST": true,
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"CHECK": true,
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"COLLATE": true,
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"COLUMN": true,
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"COMMIT": true,
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"CONFLICT": true,
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"CONSTRAINT": true,
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"CREATE": true,
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"CROSS": true,
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"CURRENT_DATE": true,
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"CURRENT_TIME": true,
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"CURRENT_TIMESTAMP": true,
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"DATABASE": true,
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"DEFAULT": true,
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"DEFERRABLE": true,
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"DEFERRED": true,
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"DELETE": true,
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"DESC": true,
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"DETACH": true,
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"DISTINCT": true,
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"DROP": true,
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"EACH": true,
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"ELSE": true,
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"END": true,
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"ESCAPE": true,
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"EXCEPT": true,
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"EXCLUSIVE": true,
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"EXISTS": true,
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"EXPLAIN": true,
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"FAIL": true,
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"FOR": true,
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"FOREIGN": true,
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"FROM": true,
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"FULL": true,
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"GLOB": true,
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"GROUP": true,
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"HAVING": true,
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"IF": true,
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"IGNORE": true,
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"IMMEDIATE": true,
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"IN": true,
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"INDEX": true,
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"INDEXED": true,
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"INITIALLY": true,
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"INNER": true,
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"INSERT": true,
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"INSTEAD": true,
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"INTERSECT": true,
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"INTO": true,
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"IS": true,
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"ISNULL": true,
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"JOIN": true,
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"KEY": true,
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"LEFT": true,
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"LIKE": true,
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"LIMIT": true,
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"MATCH": true,
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"NATURAL": true,
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"NO": true,
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"NOT": true,
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"NOTNULL": true,
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"NULL": true,
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"OF": true,
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"OFFSET": true,
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"ON": true,
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"OR": true,
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"ORDER": true,
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"OUTER": true,
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"PLAN": true,
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"PRAGMA": true,
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"PRIMARY": true,
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"QUERY": true,
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"RAISE": true,
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"RECURSIVE": true,
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"REFERENCES": true,
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"REGEXP": true,
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"REINDEX": true,
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"RELEASE": true,
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"RENAME": true,
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"REPLACE": true,
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"RESTRICT": true,
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"RIGHT": true,
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"ROLLBACK": true,
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"ROW": true,
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"SAVEPOINT": true,
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"SELECT": true,
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"SET": true,
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"TABLE": true,
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"TEMP": true,
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"TEMPORARY": true,
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"THEN": true,
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"TO": true,
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"TRANSACTI": true,
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"TRIGGER": true,
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"UNION": true,
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"UNIQUE": true,
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"UPDATE": true,
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"USING": true,
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"VACUUM": true,
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"VALUES": true,
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"VIEW": true,
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"VIRTUAL": true,
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"WHEN": true,
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"WHERE": true,
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"WITH": true,
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"WITHOUT": true,
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}
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)
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type sqlite3 struct {
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core.Base
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}
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func (db *sqlite3) Init(d *core.DB, uri *core.Uri, drivername, dataSourceName string) error {
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return db.Base.Init(d, db, uri, drivername, dataSourceName)
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}
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func (db *sqlite3) SqlType(c *core.Column) string {
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switch t := c.SQLType.Name; t {
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case core.Bool:
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if c.Default == "true" {
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c.Default = "1"
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} else if c.Default == "false" {
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c.Default = "0"
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}
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return core.Integer
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case core.Date, core.DateTime, core.TimeStamp, core.Time:
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return core.DateTime
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case core.TimeStampz:
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return core.Text
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case core.Char, core.Varchar, core.NVarchar, core.TinyText,
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core.Text, core.MediumText, core.LongText, core.Json:
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return core.Text
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case core.Bit, core.TinyInt, core.SmallInt, core.MediumInt, core.Int, core.Integer, core.BigInt:
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return core.Integer
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case core.Float, core.Double, core.Real:
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return core.Real
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case core.Decimal, core.Numeric:
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return core.Numeric
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case core.TinyBlob, core.Blob, core.MediumBlob, core.LongBlob, core.Bytea, core.Binary, core.VarBinary:
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return core.Blob
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case core.Serial, core.BigSerial:
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c.IsPrimaryKey = true
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c.IsAutoIncrement = true
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c.Nullable = false
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return core.Integer
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default:
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return t
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}
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}
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func (db *sqlite3) FormatBytes(bs []byte) string {
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return fmt.Sprintf("X'%x'", bs)
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}
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func (db *sqlite3) SupportInsertMany() bool {
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return true
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}
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func (db *sqlite3) IsReserved(name string) bool {
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_, ok := sqlite3ReservedWords[name]
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return ok
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}
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func (db *sqlite3) Quote(name string) string {
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return "`" + name + "`"
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}
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func (db *sqlite3) QuoteStr() string {
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return "`"
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}
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func (db *sqlite3) AutoIncrStr() string {
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return "AUTOINCREMENT"
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}
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func (db *sqlite3) SupportEngine() bool {
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return false
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}
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func (db *sqlite3) SupportCharset() bool {
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return false
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}
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func (db *sqlite3) IndexOnTable() bool {
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return false
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}
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func (db *sqlite3) IndexCheckSql(tableName, idxName string) (string, []interface{}) {
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args := []interface{}{idxName}
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return "SELECT name FROM sqlite_master WHERE type='index' and name = ?", args
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}
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func (db *sqlite3) TableCheckSql(tableName string) (string, []interface{}) {
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args := []interface{}{tableName}
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return "SELECT name FROM sqlite_master WHERE type='table' and name = ?", args
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}
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func (db *sqlite3) DropIndexSql(tableName string, index *core.Index) string {
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//var unique string
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quote := db.Quote
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idxName := index.Name
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if !strings.HasPrefix(idxName, "UQE_") &&
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!strings.HasPrefix(idxName, "IDX_") {
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if index.Type == core.UniqueType {
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idxName = fmt.Sprintf("UQE_%v_%v", tableName, index.Name)
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} else {
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idxName = fmt.Sprintf("IDX_%v_%v", tableName, index.Name)
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}
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}
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return fmt.Sprintf("DROP INDEX %v", quote(idxName))
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}
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func (db *sqlite3) ForUpdateSql(query string) string {
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return query
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}
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/*func (db *sqlite3) ColumnCheckSql(tableName, colName string) (string, []interface{}) {
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args := []interface{}{tableName}
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sql := "SELECT name FROM sqlite_master WHERE type='table' and name = ? and ((sql like '%`" + colName + "`%') or (sql like '%[" + colName + "]%'))"
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return sql, args
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}*/
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func (db *sqlite3) IsColumnExist(tableName, colName string) (bool, error) {
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args := []interface{}{tableName}
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query := "SELECT name FROM sqlite_master WHERE type='table' and name = ? and ((sql like '%`" + colName + "`%') or (sql like '%[" + colName + "]%'))"
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db.LogSQL(query, args)
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rows, err := db.DB().Query(query, args...)
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if err != nil {
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return false, err
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}
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defer rows.Close()
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if rows.Next() {
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return true, nil
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}
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return false, nil
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}
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func (db *sqlite3) GetColumns(tableName string) ([]string, map[string]*core.Column, error) {
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args := []interface{}{tableName}
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s := "SELECT sql FROM sqlite_master WHERE type='table' and name = ?"
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db.LogSQL(s, args)
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rows, err := db.DB().Query(s, args...)
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if err != nil {
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return nil, nil, err
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}
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defer rows.Close()
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var name string
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for rows.Next() {
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err = rows.Scan(&name)
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if err != nil {
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return nil, nil, err
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}
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break
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}
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if name == "" {
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return nil, nil, errors.New("no table named " + tableName)
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}
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nStart := strings.Index(name, "(")
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nEnd := strings.LastIndex(name, ")")
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reg := regexp.MustCompile(`[^\(,\)]*(\([^\(]*\))?`)
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colCreates := reg.FindAllString(name[nStart+1:nEnd], -1)
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cols := make(map[string]*core.Column)
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colSeq := make([]string, 0)
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for _, colStr := range colCreates {
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reg = regexp.MustCompile(`,\s`)
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colStr = reg.ReplaceAllString(colStr, ",")
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fields := strings.Fields(strings.TrimSpace(colStr))
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col := new(core.Column)
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col.Indexes = make(map[string]int)
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col.Nullable = true
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col.DefaultIsEmpty = true
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for idx, field := range fields {
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if idx == 0 {
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col.Name = strings.Trim(field, "`[] ")
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continue
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} else if idx == 1 {
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col.SQLType = core.SQLType{Name: field, DefaultLength: 0, DefaultLength2: 0}
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}
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switch field {
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case "PRIMARY":
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col.IsPrimaryKey = true
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case "AUTOINCREMENT":
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col.IsAutoIncrement = true
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case "NULL":
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if fields[idx-1] == "NOT" {
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col.Nullable = false
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} else {
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col.Nullable = true
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}
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case "DEFAULT":
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col.Default = fields[idx+1]
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col.DefaultIsEmpty = false
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}
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}
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if !col.SQLType.IsNumeric() && !col.DefaultIsEmpty {
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col.Default = "'" + col.Default + "'"
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}
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cols[col.Name] = col
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colSeq = append(colSeq, col.Name)
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}
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return colSeq, cols, nil
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}
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func (db *sqlite3) GetTables() ([]*core.Table, error) {
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args := []interface{}{}
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s := "SELECT name FROM sqlite_master WHERE type='table'"
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db.LogSQL(s, args)
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rows, err := db.DB().Query(s, args...)
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if err != nil {
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return nil, err
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}
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defer rows.Close()
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tables := make([]*core.Table, 0)
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for rows.Next() {
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table := core.NewEmptyTable()
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err = rows.Scan(&table.Name)
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if err != nil {
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return nil, err
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}
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if table.Name == "sqlite_sequence" {
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continue
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}
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tables = append(tables, table)
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}
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return tables, nil
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}
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func (db *sqlite3) GetIndexes(tableName string) (map[string]*core.Index, error) {
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args := []interface{}{tableName}
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s := "SELECT sql FROM sqlite_master WHERE type='index' and tbl_name = ?"
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db.LogSQL(s, args)
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rows, err := db.DB().Query(s, args...)
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if err != nil {
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return nil, err
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}
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defer rows.Close()
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indexes := make(map[string]*core.Index, 0)
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for rows.Next() {
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var tmpSQL sql.NullString
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err = rows.Scan(&tmpSQL)
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if err != nil {
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return nil, err
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}
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if !tmpSQL.Valid {
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continue
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}
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sql := tmpSQL.String
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index := new(core.Index)
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nNStart := strings.Index(sql, "INDEX")
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nNEnd := strings.Index(sql, "ON")
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if nNStart == -1 || nNEnd == -1 {
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continue
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}
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indexName := strings.Trim(sql[nNStart+6:nNEnd], "` []")
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if strings.HasPrefix(indexName, "IDX_"+tableName) || strings.HasPrefix(indexName, "UQE_"+tableName) {
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index.Name = indexName[5+len(tableName):]
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} else {
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index.Name = indexName
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}
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if strings.HasPrefix(sql, "CREATE UNIQUE INDEX") {
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index.Type = core.UniqueType
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} else {
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index.Type = core.IndexType
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}
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nStart := strings.Index(sql, "(")
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nEnd := strings.Index(sql, ")")
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colIndexes := strings.Split(sql[nStart+1:nEnd], ",")
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index.Cols = make([]string, 0)
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for _, col := range colIndexes {
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index.Cols = append(index.Cols, strings.Trim(col, "` []"))
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}
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indexes[index.Name] = index
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}
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return indexes, nil
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}
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func (db *sqlite3) Filters() []core.Filter {
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return []core.Filter{&core.IdFilter{}}
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}
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