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dialect_postgres.go
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dialect_postgres.go
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/*
* Copyright 2018. bigpigeon. All rights reserved.
* Use of this source code is governed by a MIT style
* license that can be found in the LICENSE file.
*/
package toyorm
import (
"database/sql"
"fmt"
"reflect"
"strings"
)
type PostgreSqlDialect struct {
DefaultDialect
}
func (dia PostgreSqlDialect) HasTable(model *Model) ExecValue {
return QToSExec{DefaultExec{
"SELECT COUNT(*) FROM pg_catalog.pg_tables WHERE tablename=?",
[]interface{}{model.Name},
}}
}
type RawResult struct {
ID int64
Err error
//rowsAffected int64
}
func (t RawResult) LastInsertId() (int64, error) {
return t.ID, t.Err
}
func (t RawResult) RowsAffected() (int64, error) {
return 0, ErrNotSupportRowsAffected{}
}
func (dia PostgreSqlDialect) InsertExecutor(db Executor, exec ExecValue, debugPrinter func(ExecValue, error)) (sql.Result, error) {
var result RawResult
query := exec.Query()
var err error
if scanErr := db.QueryRow(query, exec.Args()...).Scan(&result.ID); scanErr == sql.ErrNoRows {
result.Err = scanErr
} else {
err = scanErr
}
debugPrinter(exec, err)
return result, err
}
func (dia PostgreSqlDialect) CreateTable(model *Model, foreign map[string]ForeignKey) (execlist []ExecValue) {
// lazy init model
strList := []string{}
// use to create foreign definition
for _, sqlField := range model.GetSqlFields() {
var s string
if sqlField.AutoIncrement() {
s = fmt.Sprintf("%s SERIAL", sqlField.Column())
} else {
s = fmt.Sprintf("%s %s", sqlField.Column(), sqlField.SqlType())
}
if _default := sqlField.Default(); _default != "" {
s += " DEFAULT " + _default
}
for k, v := range sqlField.Attrs() {
if v == "" {
s += " " + k
} else {
s += " " + fmt.Sprintf("%s=%s", k, v)
}
}
strList = append(strList, s)
}
var primaryStrList []string
for _, p := range model.GetPrimary() {
primaryStrList = append(primaryStrList, p.Column())
}
strList = append(strList, fmt.Sprintf("PRIMARY KEY(%s)", strings.Join(primaryStrList, ",")))
for name, key := range foreign {
f := model.GetFieldWithName(name)
strList = append(strList,
fmt.Sprintf(`FOREIGN KEY (%s) REFERENCES "%s"(%s)`, f.Column(), key.Model.Name, key.Field.Column()),
)
}
sqlStr := fmt.Sprintf(`CREATE TABLE "%s" (%s)`,
model.Name,
strings.Join(strList, ","),
)
execlist = append(execlist, QToSExec{DefaultExec{sqlStr, nil}})
indexStrList := []string{}
for key, fieldList := range model.GetIndexMap() {
fieldStrList := []string{}
for _, f := range fieldList {
fieldStrList = append(fieldStrList, f.Column())
}
indexStrList = append(indexStrList, fmt.Sprintf(`CREATE INDEX %s ON "%s"(%s)`, key, model.Name, strings.Join(fieldStrList, ",")))
}
uniqueIndexStrList := []string{}
for key, fieldList := range model.GetUniqueIndexMap() {
fieldStrList := []string{}
for _, f := range fieldList {
fieldStrList = append(fieldStrList, f.Column())
}
uniqueIndexStrList = append(uniqueIndexStrList, fmt.Sprintf(`CREATE UNIQUE INDEX %s ON "%s"(%s)`, key, model.Name, strings.Join(fieldStrList, ",")))
}
for _, indexStr := range indexStrList {
execlist = append(execlist, QToSExec{DefaultExec{indexStr, nil}})
}
for _, indexStr := range uniqueIndexStrList {
execlist = append(execlist, QToSExec{DefaultExec{indexStr, nil}})
}
return
}
func (dia PostgreSqlDialect) DropTable(m *Model) ExecValue {
return QToSExec{DefaultExec{fmt.Sprintf(`DROP TABLE "%s"`, m.Name), nil}}
}
func (dia PostgreSqlDialect) ConditionExec(search SearchList, limit, offset int, orderBy []Column, groupBy []Column) ExecValue {
var exec ExecValue = QToSExec{}
if len(search) > 0 {
searchExec := dia.SearchExec(search)
exec = exec.Append(" WHERE "+searchExec.Source(), searchExec.Args()...)
}
if len(groupBy) > 0 {
var __list []string
for _, column := range groupBy {
__list = append(__list, column.Column())
}
exec = exec.Append(" GROUP BY " + strings.Join(__list, ","))
}
if len(orderBy) > 0 {
var __list []string
for _, column := range orderBy {
__list = append(__list, column.Column())
}
exec = exec.Append(" ORDER BY " + strings.Join(__list, ","))
}
if limit != 0 {
exec = exec.Append(fmt.Sprintf(" LIMIT %d", limit))
}
if offset != 0 {
exec = exec.Append(fmt.Sprintf(" OFFSET %d", offset))
}
return exec
}
func (dia PostgreSqlDialect) SearchExec(s SearchList) ExecValue {
var stack []ExecValue
for i := 0; i < len(s); i++ {
var exec ExecValue = QToSExec{}
switch s[i].Type {
case ExprAnd:
if len(stack) < 2 {
panic(ErrInvalidSearchTree)
}
last1, last2 := stack[len(stack)-1], stack[len(stack)-2]
stack = stack[:len(stack)-2]
exec = exec.Append(
fmt.Sprintf("%s AND %s", last2.Source(), last1.Source()),
append(append([]interface{}{}, last2.Args()...), last1.Args()...)...,
)
case ExprOr:
if len(stack) < 2 {
panic(ErrInvalidSearchTree)
}
last1, last2 := stack[len(stack)-1], stack[len(stack)-2]
stack = stack[:len(stack)-2]
exec = exec.Append(
fmt.Sprintf("(%s OR %s)", last2.Source(), last1.Source()),
append(append([]interface{}{}, last2.Args()...), last1.Args()...)...,
)
case ExprNot:
if len(stack) < 1 {
panic(ErrInvalidSearchTree)
}
last := stack[len(stack)-1]
stack = stack[:len(stack)-1]
exec = exec.Append(
fmt.Sprintf("NOT(%s)", last.Source()),
last.Args()...,
)
case ExprIgnore:
continue
case ExprEqual:
exec = exec.Append(
fmt.Sprintf("%s = ?", s[i].Val.Column()),
s[i].Val.Value().Interface(),
)
case ExprNotEqual:
exec = exec.Append(
fmt.Sprintf("%s <> ?", s[i].Val.Column()),
s[i].Val.Value().Interface(),
)
case ExprGreater:
exec = exec.Append(
fmt.Sprintf("%s > ?", s[i].Val.Column()),
s[i].Val.Value().Interface(),
)
case ExprGreaterEqual:
exec = exec.Append(
fmt.Sprintf("%s >= ?", s[i].Val.Column()),
s[i].Val.Value().Interface(),
)
case ExprLess:
exec = exec.Append(
fmt.Sprintf("%s < ?", s[i].Val.Column()),
s[i].Val.Value().Interface(),
)
case ExprLessEqual:
exec = exec.Append(
fmt.Sprintf("%s <= ?", s[i].Val.Column()),
s[i].Val.Value().Interface(),
)
case ExprBetween:
vv := reflect.ValueOf(s[i].Val.Value().Interface())
exec = exec.Append(
fmt.Sprintf("%s BETWEEN ? AND ?", s[i].Val.Column()),
vv.Index(0).Interface(), vv.Index(1).Interface(),
)
case ExprNotBetween:
vv := reflect.ValueOf(s[i].Val.Value().Interface())
exec = exec.Append(
fmt.Sprintf("%s NOT BETWEEN ? AND ?", s[i].Val.Column()),
vv.Index(0).Interface(), vv.Index(1).Interface(),
)
case ExprIn:
vv := reflect.ValueOf(s[i].Val.Value().Interface())
questionMarks := strings.TrimSuffix(strings.Repeat("?,", vv.Len()), ",")
var args []interface{}
for i := 0; i < vv.Len(); i++ {
args = append(args, vv.Index(i).Interface())
}
exec = exec.Append(
fmt.Sprintf("%s IN (%s)", s[i].Val.Column(), questionMarks),
args...,
)
case ExprNotIn:
vv := reflect.ValueOf(s[i].Val.Value().Interface())
questionMarks := strings.TrimSuffix(strings.Repeat("?,", vv.Len()), ",")
var args []interface{}
for i := 0; i < vv.Len(); i++ {
args = append(args, vv.Index(i).Interface())
}
exec = exec.Append(
fmt.Sprintf("%s NOT IN (%s)", s[i].Val.Column(), questionMarks),
args...,
)
case ExprLike:
exec = exec.Append(
fmt.Sprintf("%s LIKE ?", s[i].Val.Column()),
s[i].Val.Value().Interface(),
)
case ExprNotLike:
exec = exec.Append(
fmt.Sprintf("%s NOT LIKE ?", s[i].Val.Column()),
s[i].Val.Value().Interface(),
)
case ExprNull:
exec = exec.Append(
fmt.Sprintf("%s IS NULL", s[i].Val.Column()),
)
case ExprNotNull:
exec = exec.Append(
fmt.Sprintf("%s IS NOT NULL", s[i].Val.Column()),
)
}
stack = append(stack, exec)
}
return stack[0]
}
func (dia PostgreSqlDialect) FindExec(model *Model, columns []Column, alias string) ExecValue {
var _list []string
for _, column := range columns {
_list = append(_list, column.Column())
}
var exec ExecValue = QToSExec{}
if alias != "" {
exec = exec.Append(fmt.Sprintf(`SELECT %s FROM "%s" as "%s"`, strings.Join(_list, ","), model.Name, alias))
} else {
exec = exec.Append(fmt.Sprintf(`SELECT %s FROM "%s"`, strings.Join(_list, ","), model.Name))
}
return exec
}
func (dia PostgreSqlDialect) UpdateExec(model *Model, columnValues []ColumnValue) ExecValue {
var recordList []string
var args []interface{}
for _, r := range columnValues {
recordList = append(recordList, r.Column()+"=?")
args = append(args, r.Value().Interface())
}
var exec ExecValue = QToSExec{}
exec = exec.Append(
fmt.Sprintf(`UPDATE "%s" SET %s`, model.Name, strings.Join(recordList, ",")),
args...,
)
return exec
}
func (dia PostgreSqlDialect) DeleteExec(model *Model) (exec ExecValue) {
return QToSExec{DefaultExec{fmt.Sprintf(`DELETE FROM "%s"`, model.Name), nil}}
}
func (dia PostgreSqlDialect) insertExec(model *Model, columnValues []ColumnNameValue) ExecValue {
// optimization column format
fieldStr, qStr, args := insertValuesFormat(model, columnValues)
var exec ExecValue = QToSExec{}
exec = exec.Append(
fmt.Sprintf(`INSERT INTO "%s"(%s) VALUES(%s)`, model.Name, fieldStr, qStr),
args...,
)
return exec
}
func (dia PostgreSqlDialect) InsertExec(model *Model, columnValues []ColumnNameValue) ExecValue {
exec := dia.insertExec(model, columnValues)
if len(model.GetPrimary()) == 1 && IntKind(model.GetOnePrimary().StructField().Type.Kind()) {
exec = exec.Append(" RETURNING " + model.GetOnePrimary().Column())
}
return exec
}
// postgres have not replace use ON CONFLICT(%s) replace
func (dia PostgreSqlDialect) SaveExec(model *Model, columnNameValues []ColumnNameValue) ExecValue {
fieldStr, qStr, args := insertValuesFormat(model, columnNameValues)
var exec ExecValue = QToSExec{}
exec = exec.Append(
fmt.Sprintf(`INSERT INTO "%s"(%s) VALUES(%s)`, model.Name, fieldStr, qStr),
args...,
)
primaryKeys := model.GetPrimary()
var primaryKeyNames []string
for _, key := range primaryKeys {
primaryKeyNames = append(primaryKeyNames, key.Column())
}
var recordList []string
var casField ColumnNameValue
for _, r := range columnNameValues {
if r.Name() == "Cas" {
casField = r
}
recordList = append(recordList, r.Column()+" = Excluded."+r.Column())
}
exec = exec.Append(fmt.Sprintf(" ON CONFLICT(%s) DO UPDATE SET %s",
strings.Join(primaryKeyNames, ","),
strings.Join(recordList, ","),
))
if casField != nil {
exec = exec.Append(fmt.Sprintf(" WHERE %s.%s = ?", model.Name, casField.Column()), casField.Value().Int()-1)
}
// save only process has id data
//if len(model.GetPrimary()) == 1 && model.GetOnePrimary().AutoIncrement() {
// exec = exec.Append(" RETURNING " + model.GetOnePrimary().Column())
//}
return exec
}
func (dia PostgreSqlDialect) AddForeignKey(model, relationModel *Model, ForeignKeyField Field) ExecValue {
return DefaultExec{fmt.Sprintf(
`ALTER TABLE "%s" ADD FOREIGN KEY (%s) REFERENCES "%s"(%s)`,
model.Name, ForeignKeyField.Column(),
relationModel.Name, relationModel.GetOnePrimary().Column(),
), nil}
}
func (dia PostgreSqlDialect) DropForeignKey(model *Model, ForeignKeyField Field) ExecValue {
return QToSExec{DefaultExec{fmt.Sprintf(
`ALTER TABLE "%s" DROP FOREIGN KEY (%s)`, model.Name, ForeignKeyField.Column(),
), nil}}
}
func (dia PostgreSqlDialect) CountExec(model *Model, alias string) ExecValue {
if alias != "" {
return QToSExec{DefaultExec{fmt.Sprintf(`SELECT count(*) FROM "%s" as "%s"`, model.Name, alias), nil}}
}
return QToSExec{DefaultExec{fmt.Sprintf(`SELECT count(*) FROM "%s"`, model.Name), nil}}
}
func (dia PostgreSqlDialect) TemplateExec(tExec BasicExec, execs map[string]BasicExec) (ExecValue, error) {
exec, err := getTemplateExec(tExec, execs)
if err != nil {
return nil, err
}
return QToSExec{DefaultExec{exec.query, exec.args}}, nil
}
func (dia PostgreSqlDialect) JoinExec(mainSwap *JoinSwap) ExecValue {
var strList []string
for name := range mainSwap.JoinMap {
join := mainSwap.JoinMap[name]
swap := mainSwap.SwapMap[name]
strList = append(strList, fmt.Sprintf(`JOIN "%s" as "%s" on %s.%s = %s.%s`,
join.SubModel.Name,
swap.Alias,
mainSwap.Alias, join.OnMain.Column(),
swap.Alias, join.OnSub.Column(),
))
}
var exec ExecValue = QToSExec{DefaultExec{strings.Join(strList, " "), nil}}
for _, subSwap := range mainSwap.SwapMap {
subExec := dia.JoinExec(subSwap)
exec = exec.Append(" "+subExec.Source(), subExec.Args()...)
}
return exec
}