429 lines
11 KiB
Go
429 lines
11 KiB
Go
// 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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"errors"
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"fmt"
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"strconv"
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"strings"
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"xorm.io/xorm/core"
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)
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type db2 struct {
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core.Base
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}
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func (db *db2) Init(d *core.DB, uri *core.Uri, drivername, dataSourceName string) error {
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err := db.Base.Init(d, db, uri, drivername, dataSourceName)
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if err != nil {
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return err
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}
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return nil
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}
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func (db *db2) SqlType(c *core.Column) string {
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var res string
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switch t := c.SQLType.Name; t {
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case core.TinyInt:
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res = core.SmallInt
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return res
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case core.Bit:
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res = core.Boolean
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return res
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case core.Binary, core.VarBinary:
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return core.Bytea
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case core.DateTime:
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res = core.TimeStamp
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case core.TimeStampz:
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return "timestamp with time zone"
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case core.TinyText, core.MediumText, core.LongText:
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res = core.Text
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case core.NVarchar:
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res = core.Varchar
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case core.Uuid:
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return core.Uuid
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case core.Blob, core.TinyBlob, core.MediumBlob, core.LongBlob:
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return core.Bytea
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default:
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res = t
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}
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if strings.EqualFold(res, "bool") {
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// for bool, we don't need length information
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return res
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}
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hasLen1 := (c.Length > 0)
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hasLen2 := (c.Length2 > 0)
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if hasLen2 {
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res += "(" + strconv.Itoa(c.Length) + "," + strconv.Itoa(c.Length2) + ")"
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} else if hasLen1 {
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res += "(" + strconv.Itoa(c.Length) + ")"
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}
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return res
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}
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func (db *db2) SupportInsertMany() bool {
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return true
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}
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func (db *db2) IsReserved(name string) bool {
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_, ok := postgresReservedWords[name]
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return ok
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}
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func (db *db2) Quote(name string) string {
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name = strings.Replace(name, ".", `"."`, -1)
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return "\"" + name + "\""
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}
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func (db *db2) AutoIncrStr() string {
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return ""
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}
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func (db *db2) SupportEngine() bool {
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return false
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}
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func (db *db2) SupportCharset() bool {
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return false
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}
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func (db *db2) IndexOnTable() bool {
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return false
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}
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func (db *db2) CreateTableSql(table *core.Table, tableName, storeEngine, charset string) string {
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var sql string
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sql = "CREATE TABLE "
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if tableName == "" {
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tableName = table.Name
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}
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sql += db.Quote(tableName) + " ("
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pkList := table.PrimaryKeys
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for _, colName := range table.ColumnsSeq() {
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col := table.GetColumn(colName)
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sql += col.StringNoPk(db)
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if col.IsAutoIncrement {
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sql += " GENERATED ALWAYS AS IDENTITY (START WITH 1, INCREMENT BY 1 )"
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}
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sql = strings.TrimSpace(sql)
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sql += ", "
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}
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if len(pkList) > 0 {
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sql += "PRIMARY KEY ( "
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sql += db.Quote(strings.Join(pkList, db.Quote(",")))
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sql += " ), "
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}
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sql = sql[:len(sql)-2] + ")"
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return sql
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}
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func (db *db2) IndexCheckSql(tableName, idxName string) (string, []interface{}) {
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if len(db.Schema) == 0 {
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args := []interface{}{tableName, idxName}
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return `SELECT indexname FROM pg_indexes WHERE tablename = ? AND indexname = ?`, args
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}
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args := []interface{}{db.Schema, tableName, idxName}
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return `SELECT indexname FROM pg_indexes ` +
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`WHERE schemaname = ? AND tablename = ? AND indexname = ?`, args
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}
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func (db *db2) TableCheckSql(tableName string) (string, []interface{}) {
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if len(db.Schema) == 0 {
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args := []interface{}{tableName}
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return `SELECT tablename FROM pg_tables WHERE tablename = ?`, args
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}
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args := []interface{}{db.Schema, tableName}
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return `SELECT tablename FROM pg_tables WHERE schemaname = ? AND tablename = ?`, args
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}
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func (db *db2) ModifyColumnSql(tableName string, col *core.Column) string {
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if len(db.Schema) == 0 {
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return fmt.Sprintf("alter table %s ALTER COLUMN %s TYPE %s",
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tableName, col.Name, db.SqlType(col))
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}
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return fmt.Sprintf("alter table %s.%s ALTER COLUMN %s TYPE %s",
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db.Schema, tableName, col.Name, db.SqlType(col))
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}
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func (db *db2) DropIndexSql(tableName string, index *core.Index) string {
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quote := db.Quote
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idxName := index.Name
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tableName = strings.Replace(tableName, `"`, "", -1)
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tableName = strings.Replace(tableName, `.`, "_", -1)
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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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if db.Uri.Schema != "" {
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idxName = db.Uri.Schema + "." + idxName
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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 *db2) IsColumnExist(tableName, colName string) (bool, error) {
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args := []interface{}{db.Schema, tableName, colName}
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query := "SELECT column_name FROM INFORMATION_SCHEMA.COLUMNS WHERE table_schema = $1 AND table_name = $2" +
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" AND column_name = $3"
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if len(db.Schema) == 0 {
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args = []interface{}{tableName, colName}
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query = "SELECT column_name FROM INFORMATION_SCHEMA.COLUMNS WHERE table_name = $1" +
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" AND column_name = $2"
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}
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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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return rows.Next(), nil
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}
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func (db *db2) GetColumns(tableName string) ([]string, map[string]*core.Column, error) {
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args := []interface{}{tableName}
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s := `Select c.colname as column_name,
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c.colno as position,
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c.typename as data_type,
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c.length,
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c.scale,
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c.remarks as description,
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case when c.nulls = 'Y' then 1 else 0 end as nullable,
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default as default_value,
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case when c.identity ='Y' then 1 else 0 end as is_identity,
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case when c.generated ='' then 0 else 1 end as is_computed,
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c.text as computed_formula
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from syscat.columns c
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inner join syscat.tables t on
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t.tabschema = c.tabschema and t.tabname = c.tabname
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where t.type = 'T' AND c.tabname = ?`
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var f string
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if len(db.Schema) != 0 {
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args = append(args, db.Schema)
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f = " AND c.tabschema = ?"
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}
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s = s + f
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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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cols := make(map[string]*core.Column)
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colSeq := make([]string, 0)
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for rows.Next() {
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col := new(core.Column)
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col.Indexes = make(map[string]int)
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var colName, position, dataType, numericScale string
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var description, colDefault, computedFormula, maxLenStr *string
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var isComputed bool
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err = rows.Scan(&colName, &position, &dataType, &maxLenStr, &numericScale, &description, &col.Nullable, &colDefault, &col.IsPrimaryKey, &isComputed, &computedFormula)
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if err != nil {
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return nil, nil, err
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}
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//fmt.Println(colName, position, dataType, maxLenStr, numericScale, description, col.Nullable, colDefault, col.IsPrimaryKey, isComputed, computedFormula)
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var maxLen int
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if maxLenStr != nil {
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maxLen, err = strconv.Atoi(*maxLenStr)
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if err != nil {
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return nil, nil, err
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}
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}
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col.Name = strings.Trim(colName, `" `)
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if colDefault != nil {
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col.DefaultIsEmpty = false
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col.Default = *colDefault
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}
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if colDefault != nil && strings.HasPrefix(*colDefault, "nextval(") {
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col.IsAutoIncrement = true
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}
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switch dataType {
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case "character", "CHARACTER":
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col.SQLType = core.SQLType{Name: core.Char, DefaultLength: 0, DefaultLength2: 0}
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case "timestamp without time zone":
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col.SQLType = core.SQLType{Name: core.DateTime, DefaultLength: 0, DefaultLength2: 0}
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case "timestamp with time zone":
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col.SQLType = core.SQLType{Name: core.TimeStampz, DefaultLength: 0, DefaultLength2: 0}
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case "double precision":
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col.SQLType = core.SQLType{Name: core.Double, DefaultLength: 0, DefaultLength2: 0}
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case "boolean":
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col.SQLType = core.SQLType{Name: core.Bool, DefaultLength: 0, DefaultLength2: 0}
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case "time without time zone":
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col.SQLType = core.SQLType{Name: core.Time, DefaultLength: 0, DefaultLength2: 0}
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case "oid":
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col.SQLType = core.SQLType{Name: core.BigInt, DefaultLength: 0, DefaultLength2: 0}
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default:
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col.SQLType = core.SQLType{Name: strings.ToUpper(dataType), DefaultLength: 0, DefaultLength2: 0}
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}
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if _, ok := core.SqlTypes[col.SQLType.Name]; !ok {
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return nil, nil, fmt.Errorf("Unknown colType: %v", dataType)
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}
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col.Length = maxLen
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if col.SQLType.IsText() || col.SQLType.IsTime() {
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if col.Default != "" {
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col.Default = "'" + col.Default + "'"
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} else {
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if col.DefaultIsEmpty {
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col.Default = "''"
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}
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}
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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 *db2) GetTables() ([]*core.Table, error) {
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args := []interface{}{}
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s := "SELECT TABNAME FROM SYSCAT.TABLES WHERE type = 'T' AND OWNERTYPE = 'U'"
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if len(db.Schema) != 0 {
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args = append(args, db.Schema)
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s = s + " AND TABSCHEMA = ?"
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}
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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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var name string
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err = rows.Scan(&name)
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if err != nil {
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return nil, err
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}
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table.Name = name
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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 *db2) GetIndexes(tableName string) (map[string]*core.Index, error) {
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args := []interface{}{tableName}
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s := fmt.Sprintf(`select uniquerule,
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indname as index_name,
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replace(substring(colnames,2,length(colnames)),'+',',') as columns
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from syscat.indexes WHERE tabname = ?`)
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if len(db.Schema) != 0 {
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args = append(args, db.Schema)
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s = s + " AND tabschema=?"
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}
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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 indexTypeName, indexName, columns string
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/*when 'P' then 'Primary key'
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when 'U' then 'Unique'
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when 'D' then 'Nonunique'*/
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err = rows.Scan(&indexTypeName, &indexName, &columns)
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if err != nil {
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return nil, err
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}
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indexName = strings.Trim(indexName, `" `)
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if strings.HasSuffix(indexName, "_pkey") {
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continue
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}
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var indexType int
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if strings.EqualFold(indexTypeName, "U") {
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indexType = core.UniqueType
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} else if strings.EqualFold(indexTypeName, "D") {
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indexType = core.IndexType
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}
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var isRegular bool
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if strings.HasPrefix(indexName, "IDX_"+tableName) || strings.HasPrefix(indexName, "UQE_"+tableName) {
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newIdxName := indexName[5+len(tableName):]
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isRegular = true
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if newIdxName != "" {
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indexName = newIdxName
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}
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}
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index := &core.Index{Name: indexName, Type: indexType, Cols: make([]string, 0)}
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colNames := strings.Split(columns, ",")
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for _, colName := range colNames {
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index.Cols = append(index.Cols, strings.Trim(colName, `" `))
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}
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index.IsRegular = isRegular
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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 *db2) Filters() []core.Filter {
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return []core.Filter{&core.QuoteFilter{}}
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}
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type db2Driver struct{}
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func (p *db2Driver) Parse(driverName, dataSourceName string) (*core.Uri, error) {
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var dbName string
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var defaultSchema string
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kv := strings.Split(dataSourceName, ";")
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for _, c := range kv {
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vv := strings.SplitN(strings.TrimSpace(c), "=", 2)
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if len(vv) == 2 {
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switch strings.ToLower(vv[0]) {
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case "database":
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dbName = vv[1]
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case "uid":
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defaultSchema = vv[1]
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}
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}
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}
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if dbName == "" {
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return nil, errors.New("no db name provided")
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}
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return &core.Uri{
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DbName: dbName,
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DbType: "db2",
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Schema: defaultSchema,
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}, nil
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}
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