373 lines
11 KiB
Go
373 lines
11 KiB
Go
/* WIP Under Really Heavy Construction */
|
|
package qgen
|
|
|
|
import "strings"
|
|
import "strconv"
|
|
import "errors"
|
|
|
|
func init() {
|
|
DB_Registry = append(DB_Registry,
|
|
&Pgsql_Adapter{Name: "pgsql", Buffer: make(map[string]DB_Stmt)},
|
|
)
|
|
}
|
|
|
|
type Pgsql_Adapter struct {
|
|
Name string // ? - Do we really need this? Can't we hard-code this?
|
|
Buffer map[string]DB_Stmt
|
|
BufferOrder []string // Map iteration order is random, so we need this to track the order, so we don't get huge diffs every commit
|
|
}
|
|
|
|
// GetName gives you the name of the database adapter. In this case, it's pgsql
|
|
func (adapter *Pgsql_Adapter) GetName() string {
|
|
return adapter.Name
|
|
}
|
|
|
|
func (adapter *Pgsql_Adapter) GetStmt(name string) DB_Stmt {
|
|
return adapter.Buffer[name]
|
|
}
|
|
|
|
func (adapter *Pgsql_Adapter) GetStmts() map[string]DB_Stmt {
|
|
return adapter.Buffer
|
|
}
|
|
|
|
// TODO: Implement this
|
|
// We may need to change the CreateTable API to better suit PGSQL and the other database drivers which are coming up
|
|
func (adapter *Pgsql_Adapter) CreateTable(name string, table string, charset string, collation string, columns []DB_Table_Column, keys []DB_Table_Key) (string, error) {
|
|
if name == "" {
|
|
return "", errors.New("You need a name for this statement")
|
|
}
|
|
if table == "" {
|
|
return "", errors.New("You need a name for this table")
|
|
}
|
|
if len(columns) == 0 {
|
|
return "", errors.New("You can't have a table with no columns")
|
|
}
|
|
|
|
var querystr = "CREATE TABLE `" + table + "` ("
|
|
for _, column := range columns {
|
|
if column.Auto_Increment {
|
|
column.Type = "serial"
|
|
} else if column.Type == "createdAt" {
|
|
column.Type = "timestamp"
|
|
} else if column.Type == "datetime" {
|
|
column.Type = "timestamp"
|
|
}
|
|
|
|
var size string
|
|
if column.Size > 0 {
|
|
size = " (" + strconv.Itoa(column.Size) + ")"
|
|
}
|
|
|
|
var end string
|
|
if column.Default != "" {
|
|
end = " DEFAULT "
|
|
if adapter.stringyType(column.Type) && column.Default != "''" {
|
|
end += "'" + column.Default + "'"
|
|
} else {
|
|
end += column.Default
|
|
}
|
|
}
|
|
|
|
if !column.Null {
|
|
end += " not null"
|
|
}
|
|
|
|
querystr += "\n\t`" + column.Name + "` " + column.Type + size + end + ","
|
|
}
|
|
|
|
if len(keys) > 0 {
|
|
for _, key := range keys {
|
|
querystr += "\n\t" + key.Type
|
|
if key.Type != "unique" {
|
|
querystr += " key"
|
|
}
|
|
querystr += "("
|
|
for _, column := range strings.Split(key.Columns, ",") {
|
|
querystr += "`" + column + "`,"
|
|
}
|
|
querystr = querystr[0:len(querystr)-1] + "),"
|
|
}
|
|
}
|
|
|
|
querystr = querystr[0:len(querystr)-1] + "\n);"
|
|
adapter.pushStatement(name, "create-table", querystr)
|
|
return querystr, nil
|
|
}
|
|
|
|
// TODO: Implement this
|
|
func (adapter *Pgsql_Adapter) SimpleInsert(name string, table string, columns string, fields string) (string, error) {
|
|
if name == "" {
|
|
return "", errors.New("You need a name for this statement")
|
|
}
|
|
if table == "" {
|
|
return "", errors.New("You need a name for this table")
|
|
}
|
|
if len(columns) == 0 {
|
|
return "", errors.New("No columns found for SimpleInsert")
|
|
}
|
|
if len(fields) == 0 {
|
|
return "", errors.New("No input data found for SimpleInsert")
|
|
}
|
|
return "", nil
|
|
}
|
|
|
|
// TODO: Implement this
|
|
func (adapter *Pgsql_Adapter) SimpleReplace(name string, table string, columns string, fields string) (string, error) {
|
|
if name == "" {
|
|
return "", errors.New("You need a name for this statement")
|
|
}
|
|
if table == "" {
|
|
return "", errors.New("You need a name for this table")
|
|
}
|
|
if len(columns) == 0 {
|
|
return "", errors.New("No columns found for SimpleInsert")
|
|
}
|
|
if len(fields) == 0 {
|
|
return "", errors.New("No input data found for SimpleInsert")
|
|
}
|
|
return "", nil
|
|
}
|
|
|
|
// TODO: Implement this
|
|
func (adapter *Pgsql_Adapter) SimpleUpsert(name string, table string, columns string, fields string, where string) (string, error) {
|
|
if name == "" {
|
|
return "", errors.New("You need a name for this statement")
|
|
}
|
|
if table == "" {
|
|
return "", errors.New("You need a name for this table")
|
|
}
|
|
if len(columns) == 0 {
|
|
return "", errors.New("No columns found for SimpleInsert")
|
|
}
|
|
if len(fields) == 0 {
|
|
return "", errors.New("No input data found for SimpleInsert")
|
|
}
|
|
return "", nil
|
|
}
|
|
|
|
// TODO: Implemented, but we need CreateTable and a better installer to *test* it
|
|
func (adapter *Pgsql_Adapter) SimpleUpdate(name string, table string, set string, where string) (string, error) {
|
|
if name == "" {
|
|
return "", errors.New("You need a name for this statement")
|
|
}
|
|
if table == "" {
|
|
return "", errors.New("You need a name for this table")
|
|
}
|
|
if set == "" {
|
|
return "", errors.New("You need to set data in this update statement")
|
|
}
|
|
var querystr = "UPDATE `" + table + "` SET "
|
|
for _, item := range processSet(set) {
|
|
querystr += "`" + item.Column + "` ="
|
|
for _, token := range item.Expr {
|
|
switch token.Type {
|
|
case "function":
|
|
// TODO: Write a more sophisticated function parser on the utils side.
|
|
if strings.ToUpper(token.Contents) == "UTC_TIMESTAMP()" {
|
|
token.Contents = "LOCALTIMESTAMP()"
|
|
}
|
|
querystr += " " + token.Contents
|
|
case "operator", "number", "substitute":
|
|
querystr += " " + token.Contents
|
|
case "column":
|
|
querystr += " `" + token.Contents + "`"
|
|
case "string":
|
|
querystr += " '" + token.Contents + "'"
|
|
}
|
|
}
|
|
querystr += ","
|
|
}
|
|
|
|
// Remove the trailing comma
|
|
querystr = querystr[0 : len(querystr)-1]
|
|
|
|
// Add support for BETWEEN x.x
|
|
if len(where) != 0 {
|
|
querystr += " WHERE"
|
|
for _, loc := range processWhere(where) {
|
|
for _, token := range loc.Expr {
|
|
switch token.Type {
|
|
case "function":
|
|
// TODO: Write a more sophisticated function parser on the utils side. What's the situation in regards to case sensitivity?
|
|
if strings.ToUpper(token.Contents) == "UTC_TIMESTAMP()" {
|
|
token.Contents = "LOCALTIMESTAMP()"
|
|
}
|
|
querystr += " " + token.Contents
|
|
case "operator", "number", "substitute":
|
|
querystr += " " + token.Contents
|
|
case "column":
|
|
querystr += " `" + token.Contents + "`"
|
|
case "string":
|
|
querystr += " '" + token.Contents + "'"
|
|
default:
|
|
panic("This token doesn't exist o_o")
|
|
}
|
|
}
|
|
querystr += " AND"
|
|
}
|
|
querystr = querystr[0 : len(querystr)-4]
|
|
}
|
|
|
|
adapter.pushStatement(name, "update", querystr)
|
|
return querystr, nil
|
|
}
|
|
|
|
// TODO: Implement this
|
|
func (adapter *Pgsql_Adapter) SimpleDelete(name string, table string, where string) (string, error) {
|
|
if name == "" {
|
|
return "", errors.New("You need a name for this statement")
|
|
}
|
|
if table == "" {
|
|
return "", errors.New("You need a name for this table")
|
|
}
|
|
if where == "" {
|
|
return "", errors.New("You need to specify what data you want to delete")
|
|
}
|
|
return "", nil
|
|
}
|
|
|
|
// TODO: Implement this
|
|
// We don't want to accidentally wipe tables, so we'll have a seperate method for purging tables instead
|
|
func (adapter *Pgsql_Adapter) Purge(name string, table string) (string, error) {
|
|
if name == "" {
|
|
return "", errors.New("You need a name for this statement")
|
|
}
|
|
if table == "" {
|
|
return "", errors.New("You need a name for this table")
|
|
}
|
|
return "", nil
|
|
}
|
|
|
|
// TODO: Implement this
|
|
func (adapter *Pgsql_Adapter) SimpleSelect(name string, table string, columns string, where string, orderby string, limit string) (string, error) {
|
|
if name == "" {
|
|
return "", errors.New("You need a name for this statement")
|
|
}
|
|
if table == "" {
|
|
return "", errors.New("You need a name for this table")
|
|
}
|
|
if len(columns) == 0 {
|
|
return "", errors.New("No columns found for SimpleSelect")
|
|
}
|
|
return "", nil
|
|
}
|
|
|
|
// TODO: Implement this
|
|
func (adapter *Pgsql_Adapter) SimpleLeftJoin(name string, table1 string, table2 string, columns string, joiners string, where string, orderby string, limit string) (string, error) {
|
|
if name == "" {
|
|
return "", errors.New("You need a name for this statement")
|
|
}
|
|
if table1 == "" {
|
|
return "", errors.New("You need a name for the left table")
|
|
}
|
|
if table2 == "" {
|
|
return "", errors.New("You need a name for the right table")
|
|
}
|
|
if len(columns) == 0 {
|
|
return "", errors.New("No columns found for SimpleLeftJoin")
|
|
}
|
|
if len(joiners) == 0 {
|
|
return "", errors.New("No joiners found for SimpleLeftJoin")
|
|
}
|
|
return "", nil
|
|
}
|
|
|
|
// TODO: Implement this
|
|
func (adapter *Pgsql_Adapter) SimpleInnerJoin(name string, table1 string, table2 string, columns string, joiners string, where string, orderby string, limit string) (string, error) {
|
|
if name == "" {
|
|
return "", errors.New("You need a name for this statement")
|
|
}
|
|
if table1 == "" {
|
|
return "", errors.New("You need a name for the left table")
|
|
}
|
|
if table2 == "" {
|
|
return "", errors.New("You need a name for the right table")
|
|
}
|
|
if len(columns) == 0 {
|
|
return "", errors.New("No columns found for SimpleInnerJoin")
|
|
}
|
|
if len(joiners) == 0 {
|
|
return "", errors.New("No joiners found for SimpleInnerJoin")
|
|
}
|
|
return "", nil
|
|
}
|
|
|
|
// TODO: Implement this
|
|
func (adapter *Pgsql_Adapter) SimpleInsertSelect(name string, ins DB_Insert, sel DB_Select) (string, error) {
|
|
return "", nil
|
|
}
|
|
|
|
// TODO: Implement this
|
|
func (adapter *Pgsql_Adapter) SimpleInsertLeftJoin(name string, ins DB_Insert, sel DB_Join) (string, error) {
|
|
return "", nil
|
|
}
|
|
|
|
// TODO: Implement this
|
|
func (adapter *Pgsql_Adapter) SimpleInsertInnerJoin(name string, ins DB_Insert, sel DB_Join) (string, error) {
|
|
return "", nil
|
|
}
|
|
|
|
// TODO: Implement this
|
|
func (adapter *Pgsql_Adapter) SimpleCount(name string, table string, where string, limit string) (string, error) {
|
|
if name == "" {
|
|
return "", errors.New("You need a name for this statement")
|
|
}
|
|
if table == "" {
|
|
return "", errors.New("You need a name for this table")
|
|
}
|
|
return "", nil
|
|
}
|
|
|
|
func (adapter *Pgsql_Adapter) Write() error {
|
|
var stmts, body string
|
|
for _, name := range adapter.BufferOrder {
|
|
if name[0] == '_' {
|
|
continue
|
|
}
|
|
stmt := adapter.Buffer[name]
|
|
// TODO: Add support for create-table? Table creation might be a little complex for Go to do outside a SQL file :(
|
|
if stmt.Type != "create-table" {
|
|
stmts += "var " + name + "Stmt *sql.Stmt\n"
|
|
body += `
|
|
log.Print("Preparing ` + name + ` statement.")
|
|
` + name + `Stmt, err = db.Prepare("` + stmt.Contents + `")
|
|
if err != nil {
|
|
return err
|
|
}
|
|
`
|
|
}
|
|
}
|
|
|
|
out := `// +build pgsql
|
|
|
|
// This file was generated by Gosora's Query Generator. Please try to avoid modifying this file, as it might change at any time.
|
|
package main
|
|
|
|
import "log"
|
|
import "database/sql"
|
|
|
|
// nolint
|
|
` + stmts + `
|
|
// nolint
|
|
func _gen_pgsql() (err error) {
|
|
if dev.DebugMode {
|
|
log.Print("Building the generated statements")
|
|
}
|
|
` + body + `
|
|
return nil
|
|
}
|
|
`
|
|
return writeFile("./gen_pgsql.go", out)
|
|
}
|
|
|
|
// Internal methods, not exposed in the interface
|
|
func (adapter *Pgsql_Adapter) pushStatement(name string, stype string, querystr string) {
|
|
adapter.Buffer[name] = DB_Stmt{querystr, stype}
|
|
adapter.BufferOrder = append(adapter.BufferOrder, name)
|
|
}
|
|
|
|
func (adapter *Pgsql_Adapter) stringyType(ctype string) bool {
|
|
ctype = strings.ToLower(ctype)
|
|
return ctype == "char" || ctype == "varchar" || ctype == "timestamp" || ctype == "text"
|
|
}
|