707 lines
21 KiB
Go
707 lines
21 KiB
Go
/* WIP Under Construction */
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package qgen
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//import "fmt"
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import (
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"errors"
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"strconv"
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"strings"
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)
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func init() {
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Registry = append(Registry,
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&MysqlAdapter{Name: "mysql", Buffer: make(map[string]DBStmt)},
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)
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}
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type MysqlAdapter struct {
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Name string // ? - Do we really need this? Can't we hard-code this?
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Buffer map[string]DBStmt
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BufferOrder []string // Map iteration order is random, so we need this to track the order, so we don't get huge diffs every commit
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}
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// GetName gives you the name of the database adapter. In this case, it's mysql
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func (adapter *MysqlAdapter) GetName() string {
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return adapter.Name
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}
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func (adapter *MysqlAdapter) GetStmt(name string) DBStmt {
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return adapter.Buffer[name]
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}
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func (adapter *MysqlAdapter) GetStmts() map[string]DBStmt {
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return adapter.Buffer
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}
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func (adapter *MysqlAdapter) CreateTable(name string, table string, charset string, collation string, columns []DBTableColumn, keys []DBTableKey) (string, error) {
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if name == "" {
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return "", errors.New("You need a name for this statement")
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}
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if table == "" {
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return "", errors.New("You need a name for this table")
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}
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if len(columns) == 0 {
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return "", errors.New("You can't have a table with no columns")
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}
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var querystr = "CREATE TABLE `" + table + "` ("
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for _, column := range columns {
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// Make it easier to support Cassandra in the future
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if column.Type == "createdAt" {
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column.Type = "datetime"
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} else if column.Type == "json" {
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column.Type = "text"
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}
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var size string
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if column.Size > 0 {
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size = "(" + strconv.Itoa(column.Size) + ")"
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}
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var end string
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// TODO: Exclude the other variants of text like mediumtext and longtext too
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if column.Default != "" && column.Type != "text" {
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end = " DEFAULT "
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if adapter.stringyType(column.Type) && column.Default != "''" {
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end += "'" + column.Default + "'"
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} else {
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end += column.Default
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}
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}
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if column.Null {
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end += " null"
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} else {
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end += " not null"
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}
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if column.AutoIncrement {
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end += " AUTO_INCREMENT"
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}
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querystr += "\n\t`" + column.Name + "` " + column.Type + size + end + ","
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}
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if len(keys) > 0 {
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for _, key := range keys {
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querystr += "\n\t" + key.Type
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if key.Type != "unique" {
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querystr += " key"
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}
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querystr += "("
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for _, column := range strings.Split(key.Columns, ",") {
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querystr += "`" + column + "`,"
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}
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querystr = querystr[0:len(querystr)-1] + "),"
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}
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}
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querystr = querystr[0:len(querystr)-1] + "\n)"
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if charset != "" {
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querystr += " CHARSET=" + charset
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}
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if collation != "" {
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querystr += " COLLATE " + collation
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}
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adapter.pushStatement(name, "create-table", querystr+";")
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return querystr + ";", nil
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}
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func (adapter *MysqlAdapter) SimpleInsert(name string, table string, columns string, fields string) (string, error) {
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if name == "" {
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return "", errors.New("You need a name for this statement")
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}
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if table == "" {
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return "", errors.New("You need a name for this table")
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}
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if len(columns) == 0 {
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return "", errors.New("No columns found for SimpleInsert")
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}
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if len(fields) == 0 {
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return "", errors.New("No input data found for SimpleInsert")
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}
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var querystr = "INSERT INTO `" + table + "`(" + adapter.buildColumns(columns) + ") VALUES ("
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for _, field := range processFields(fields) {
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nameLen := len(field.Name)
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if field.Name[0] == '"' && field.Name[nameLen-1] == '"' && nameLen >= 3 {
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field.Name = "'" + field.Name[1:nameLen-1] + "'"
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}
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if field.Name[0] == '\'' && field.Name[nameLen-1] == '\'' && nameLen >= 3 {
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field.Name = "'" + strings.Replace(field.Name[1:nameLen-1], "'", "''", -1) + "'"
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}
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querystr += field.Name + ","
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}
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querystr = querystr[0:len(querystr)-1] + ")"
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adapter.pushStatement(name, "insert", querystr)
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return querystr, nil
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}
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func (adapter *MysqlAdapter) buildColumns(columns string) (querystr string) {
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// Escape the column names, just in case we've used a reserved keyword
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for _, column := range processColumns(columns) {
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if column.Type == "function" {
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querystr += column.Left + ","
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} else {
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querystr += "`" + column.Left + "`,"
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}
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}
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return querystr[0 : len(querystr)-1]
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}
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// ! DEPRECATED
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func (adapter *MysqlAdapter) SimpleReplace(name string, table string, columns string, fields string) (string, error) {
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if name == "" {
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return "", errors.New("You need a name for this statement")
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}
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if table == "" {
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return "", errors.New("You need a name for this table")
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}
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if len(columns) == 0 {
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return "", errors.New("No columns found for SimpleInsert")
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}
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if len(fields) == 0 {
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return "", errors.New("No input data found for SimpleInsert")
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}
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var querystr = "REPLACE INTO `" + table + "`(" + adapter.buildColumns(columns) + ") VALUES ("
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for _, field := range processFields(fields) {
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querystr += field.Name + ","
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}
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querystr = querystr[0 : len(querystr)-1]
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adapter.pushStatement(name, "replace", querystr+")")
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return querystr + ")", nil
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}
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func (adapter *MysqlAdapter) SimpleUpsert(name string, table string, columns string, fields string, where string) (string, error) {
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if name == "" {
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return "", errors.New("You need a name for this statement")
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}
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if table == "" {
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return "", errors.New("You need a name for this table")
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}
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if len(columns) == 0 {
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return "", errors.New("No columns found for SimpleInsert")
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}
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if len(fields) == 0 {
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return "", errors.New("No input data found for SimpleInsert")
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}
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if where == "" {
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return "", errors.New("You need a where for this upsert")
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}
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var querystr = "INSERT INTO `" + table + "`("
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var parsedFields = processFields(fields)
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var insertColumns string
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var insertValues string
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var setBit = ") ON DUPLICATE KEY UPDATE "
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for columnID, column := range processColumns(columns) {
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field := parsedFields[columnID]
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if column.Type == "function" {
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insertColumns += column.Left + ","
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insertValues += field.Name + ","
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setBit += column.Left + " = " + field.Name + " AND "
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} else {
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insertColumns += "`" + column.Left + "`,"
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insertValues += field.Name + ","
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setBit += "`" + column.Left + "` = " + field.Name + " AND "
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}
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}
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insertColumns = insertColumns[0 : len(insertColumns)-1]
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insertValues = insertValues[0 : len(insertValues)-1]
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insertColumns += ") VALUES (" + insertValues
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setBit = setBit[0 : len(setBit)-5]
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querystr += insertColumns + setBit
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adapter.pushStatement(name, "upsert", querystr)
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return querystr, nil
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}
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func (adapter *MysqlAdapter) SimpleUpdate(name string, table string, set string, where string) (string, error) {
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if name == "" {
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return "", errors.New("You need a name for this statement")
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}
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if table == "" {
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return "", errors.New("You need a name for this table")
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}
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if set == "" {
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return "", errors.New("You need to set data in this update statement")
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}
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var querystr = "UPDATE `" + table + "` SET "
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for _, item := range processSet(set) {
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querystr += "`" + item.Column + "` ="
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for _, token := range item.Expr {
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switch token.Type {
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case "function", "operator", "number", "substitute":
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querystr += " " + token.Contents
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case "column":
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querystr += " `" + token.Contents + "`"
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case "string":
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querystr += " '" + token.Contents + "'"
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}
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}
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querystr += ","
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}
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querystr = querystr[0 : len(querystr)-1]
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whereStr, err := adapter.buildWhere(where)
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if err != nil {
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return querystr, err
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}
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querystr += whereStr
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adapter.pushStatement(name, "update", querystr)
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return querystr, nil
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}
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func (adapter *MysqlAdapter) SimpleDelete(name string, table string, where string) (string, error) {
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if name == "" {
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return "", errors.New("You need a name for this statement")
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}
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if table == "" {
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return "", errors.New("You need a name for this table")
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}
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if where == "" {
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return "", errors.New("You need to specify what data you want to delete")
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}
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var querystr = "DELETE FROM `" + table + "` WHERE"
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// Add support for BETWEEN x.x
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for _, loc := range processWhere(where) {
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for _, token := range loc.Expr {
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switch token.Type {
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case "function", "operator", "number", "substitute":
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querystr += " " + token.Contents
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case "column":
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querystr += " `" + token.Contents + "`"
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case "string":
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querystr += " '" + token.Contents + "'"
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default:
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panic("This token doesn't exist o_o")
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}
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}
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querystr += " AND"
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}
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querystr = strings.TrimSpace(querystr[0 : len(querystr)-4])
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adapter.pushStatement(name, "delete", querystr)
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return querystr, nil
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}
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// We don't want to accidentally wipe tables, so we'll have a separate method for purging tables instead
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func (adapter *MysqlAdapter) Purge(name string, table string) (string, error) {
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if name == "" {
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return "", errors.New("You need a name for this statement")
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}
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if table == "" {
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return "", errors.New("You need a name for this table")
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}
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adapter.pushStatement(name, "purge", "DELETE FROM `"+table+"`")
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return "DELETE FROM `" + table + "`", nil
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}
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func (adapter *MysqlAdapter) buildWhere(where string) (querystr string, err error) {
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if len(where) == 0 {
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return "", nil
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}
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querystr = " WHERE"
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for _, loc := range processWhere(where) {
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for _, token := range loc.Expr {
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switch token.Type {
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case "function", "operator", "number", "substitute":
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querystr += " " + token.Contents
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case "column":
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querystr += " `" + token.Contents + "`"
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case "string":
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querystr += " '" + token.Contents + "'"
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default:
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return querystr, errors.New("This token doesn't exist o_o")
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}
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}
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querystr += " AND"
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}
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return querystr[0 : len(querystr)-4], nil
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}
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// The new version of buildWhere() currently only used in ComplexSelect for complex OO builder queries
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func (adapter *MysqlAdapter) buildFlexiWhere(where string, dateCutoff *dateCutoff) (querystr string, err error) {
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if len(where) == 0 && dateCutoff == nil {
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return "", nil
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}
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querystr = " WHERE"
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if dateCutoff != nil {
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querystr += " " + dateCutoff.Column + " BETWEEN (UTC_TIMESTAMP() - interval " + strconv.Itoa(dateCutoff.Quantity) + " " + dateCutoff.Unit + ") AND UTC_TIMESTAMP() AND"
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}
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if len(where) != 0 {
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for _, loc := range processWhere(where) {
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for _, token := range loc.Expr {
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switch token.Type {
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case "function", "operator", "number", "substitute":
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querystr += " " + token.Contents
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case "column":
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querystr += " `" + token.Contents + "`"
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case "string":
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querystr += " '" + token.Contents + "'"
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default:
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return querystr, errors.New("This token doesn't exist o_o")
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}
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}
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querystr += " AND"
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}
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}
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return querystr[0 : len(querystr)-4], nil
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}
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func (adapter *MysqlAdapter) buildOrderby(orderby string) (querystr string) {
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if len(orderby) != 0 {
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querystr = " ORDER BY "
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for _, column := range processOrderby(orderby) {
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// TODO: We might want to escape this column
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querystr += column.Column + " " + strings.ToUpper(column.Order) + ","
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}
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querystr = querystr[0 : len(querystr)-1]
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}
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return querystr
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}
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func (adapter *MysqlAdapter) SimpleSelect(name string, table string, columns string, where string, orderby string, limit string) (string, error) {
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if name == "" {
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return "", errors.New("You need a name for this statement")
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}
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if table == "" {
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return "", errors.New("You need a name for this table")
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}
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if len(columns) == 0 {
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return "", errors.New("No columns found for SimpleSelect")
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}
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var querystr = "SELECT "
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// Slice up the user friendly strings into something easier to process
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for _, column := range strings.Split(strings.TrimSpace(columns), ",") {
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querystr += "`" + strings.TrimSpace(column) + "`,"
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}
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querystr = querystr[0 : len(querystr)-1]
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whereStr, err := adapter.buildWhere(where)
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if err != nil {
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return querystr, err
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}
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querystr += " FROM `" + table + "`" + whereStr + adapter.buildOrderby(orderby) + adapter.buildLimit(limit)
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querystr = strings.TrimSpace(querystr)
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adapter.pushStatement(name, "select", querystr)
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return querystr, nil
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}
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func (adapter *MysqlAdapter) ComplexSelect(preBuilder *selectPrebuilder) (out string, err error) {
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if preBuilder.name == "" {
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return "", errors.New("You need a name for this statement")
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}
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if preBuilder.table == "" {
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return "", errors.New("You need a name for this table")
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}
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if len(preBuilder.columns) == 0 {
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return "", errors.New("No columns found for ComplexSelect")
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}
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var querystr = "SELECT "
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// Slice up the user friendly strings into something easier to process
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for _, column := range strings.Split(strings.TrimSpace(preBuilder.columns), ",") {
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querystr += "`" + strings.TrimSpace(column) + "`,"
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}
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querystr = querystr[0 : len(querystr)-1]
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var whereStr string
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// TODO: Let callers have a Where() and a InQ()
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if preBuilder.inChain != nil {
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whereStr, err = adapter.ComplexSelect(preBuilder.inChain)
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if err != nil {
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return querystr, err
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}
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whereStr = " WHERE `" + preBuilder.inColumn + "` IN(" + whereStr + ")"
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} else {
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whereStr, err = adapter.buildFlexiWhere(preBuilder.where, preBuilder.dateCutoff)
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if err != nil {
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return querystr, err
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}
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}
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querystr += " FROM `" + preBuilder.table + "`" + whereStr + adapter.buildOrderby(preBuilder.orderby) + adapter.buildLimit(preBuilder.limit)
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querystr = strings.TrimSpace(querystr)
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adapter.pushStatement(preBuilder.name, "select", querystr)
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return querystr, nil
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}
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func (adapter *MysqlAdapter) SimpleLeftJoin(name string, table1 string, table2 string, columns string, joiners string, where string, orderby string, limit string) (string, error) {
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if name == "" {
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return "", errors.New("You need a name for this statement")
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}
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if table1 == "" {
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return "", errors.New("You need a name for the left table")
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}
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if table2 == "" {
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return "", errors.New("You need a name for the right table")
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}
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if len(columns) == 0 {
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return "", errors.New("No columns found for SimpleLeftJoin")
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}
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if len(joiners) == 0 {
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return "", errors.New("No joiners found for SimpleLeftJoin")
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}
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whereStr, err := adapter.buildJoinWhere(where)
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if err != nil {
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return "", err
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}
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var querystr = "SELECT" + adapter.buildJoinColumns(columns) + " FROM `" + table1 + "` LEFT JOIN `" + table2 + "` ON " + adapter.buildJoiners(joiners) + whereStr + adapter.buildOrderby(orderby) + adapter.buildLimit(limit)
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querystr = strings.TrimSpace(querystr)
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adapter.pushStatement(name, "select", querystr)
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return querystr, nil
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}
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func (adapter *MysqlAdapter) SimpleInnerJoin(name string, table1 string, table2 string, columns string, joiners string, where string, orderby string, limit string) (string, error) {
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if name == "" {
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return "", errors.New("You need a name for this statement")
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}
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if table1 == "" {
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return "", errors.New("You need a name for the left table")
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}
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if table2 == "" {
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return "", errors.New("You need a name for the right table")
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}
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if len(columns) == 0 {
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return "", errors.New("No columns found for SimpleInnerJoin")
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}
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if len(joiners) == 0 {
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return "", errors.New("No joiners found for SimpleInnerJoin")
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}
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whereStr, err := adapter.buildJoinWhere(where)
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if err != nil {
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return "", err
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}
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var querystr = "SELECT " + adapter.buildJoinColumns(columns) + " FROM `" + table1 + "` INNER JOIN `" + table2 + "` ON " + adapter.buildJoiners(joiners) + whereStr + adapter.buildOrderby(orderby) + adapter.buildLimit(limit)
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querystr = strings.TrimSpace(querystr)
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adapter.pushStatement(name, "select", querystr)
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return querystr, nil
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}
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func (adapter *MysqlAdapter) SimpleInsertSelect(name string, ins DBInsert, sel DBSelect) (string, error) {
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whereStr, err := adapter.buildWhere(sel.Where)
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if err != nil {
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return "", err
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}
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|
|
var querystr = "INSERT INTO `" + ins.Table + "`(" + adapter.buildColumns(ins.Columns) + ") SELECT" + adapter.buildJoinColumns(sel.Columns) + " FROM `" + sel.Table + "`" + whereStr + adapter.buildOrderby(sel.Orderby) + adapter.buildLimit(sel.Limit)
|
|
|
|
querystr = strings.TrimSpace(querystr)
|
|
adapter.pushStatement(name, "insert", querystr)
|
|
return querystr, nil
|
|
}
|
|
|
|
func (adapter *MysqlAdapter) SimpleInsertLeftJoin(name string, ins DBInsert, sel DBJoin) (string, error) {
|
|
whereStr, err := adapter.buildJoinWhere(sel.Where)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
|
|
var querystr = "INSERT INTO `" + ins.Table + "`(" + adapter.buildColumns(ins.Columns) + ") SELECT" + adapter.buildJoinColumns(sel.Columns) + " FROM `" + sel.Table1 + "` LEFT JOIN `" + sel.Table2 + "` ON " + adapter.buildJoiners(sel.Joiners) + whereStr + adapter.buildOrderby(sel.Orderby) + adapter.buildLimit(sel.Limit)
|
|
|
|
querystr = strings.TrimSpace(querystr)
|
|
adapter.pushStatement(name, "insert", querystr)
|
|
return querystr, nil
|
|
}
|
|
|
|
// TODO: Make this more consistent with the other build* methods?
|
|
func (adapter *MysqlAdapter) buildJoiners(joiners string) (querystr string) {
|
|
for _, joiner := range processJoiner(joiners) {
|
|
querystr += "`" + joiner.LeftTable + "`.`" + joiner.LeftColumn + "` " + joiner.Operator + " `" + joiner.RightTable + "`.`" + joiner.RightColumn + "` AND "
|
|
}
|
|
// Remove the trailing AND
|
|
return querystr[0 : len(querystr)-4]
|
|
}
|
|
|
|
// Add support for BETWEEN x.x
|
|
func (adapter *MysqlAdapter) buildJoinWhere(where string) (querystr string, err error) {
|
|
if len(where) != 0 {
|
|
querystr = " WHERE"
|
|
for _, loc := range processWhere(where) {
|
|
for _, token := range loc.Expr {
|
|
switch token.Type {
|
|
case "function", "operator", "number", "substitute":
|
|
querystr += " " + token.Contents
|
|
case "column":
|
|
halves := strings.Split(token.Contents, ".")
|
|
if len(halves) == 2 {
|
|
querystr += " `" + halves[0] + "`.`" + halves[1] + "`"
|
|
} else {
|
|
querystr += " `" + token.Contents + "`"
|
|
}
|
|
case "string":
|
|
querystr += " '" + token.Contents + "'"
|
|
default:
|
|
return querystr, errors.New("This token doesn't exist o_o")
|
|
}
|
|
}
|
|
querystr += " AND"
|
|
}
|
|
querystr = querystr[0 : len(querystr)-4]
|
|
}
|
|
return querystr, nil
|
|
}
|
|
|
|
func (adapter *MysqlAdapter) buildLimit(limit string) (querystr string) {
|
|
if limit != "" {
|
|
querystr = " LIMIT " + limit
|
|
}
|
|
return querystr
|
|
}
|
|
|
|
func (adapter *MysqlAdapter) buildJoinColumns(columns string) (querystr string) {
|
|
for _, column := range processColumns(columns) {
|
|
// Escape the column names, just in case we've used a reserved keyword
|
|
var source = column.Left
|
|
if column.Table != "" {
|
|
source = "`" + column.Table + "`.`" + source + "`"
|
|
} else if column.Type != "function" {
|
|
source = "`" + source + "`"
|
|
}
|
|
|
|
var alias string
|
|
if column.Alias != "" {
|
|
alias = " AS `" + column.Alias + "`"
|
|
}
|
|
querystr += " " + source + alias + ","
|
|
}
|
|
return querystr[0 : len(querystr)-1]
|
|
}
|
|
|
|
func (adapter *MysqlAdapter) SimpleInsertInnerJoin(name string, ins DBInsert, sel DBJoin) (string, error) {
|
|
whereStr, err := adapter.buildJoinWhere(sel.Where)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
|
|
var querystr = "INSERT INTO `" + ins.Table + "`(" + adapter.buildColumns(ins.Columns) + ") SELECT" + adapter.buildJoinColumns(sel.Columns) + " FROM `" + sel.Table1 + "` INNER JOIN `" + sel.Table2 + "` ON " + adapter.buildJoiners(sel.Joiners) + whereStr + adapter.buildOrderby(sel.Orderby) + adapter.buildLimit(sel.Limit)
|
|
|
|
querystr = strings.TrimSpace(querystr)
|
|
adapter.pushStatement(name, "insert", querystr)
|
|
return querystr, nil
|
|
}
|
|
|
|
func (adapter *MysqlAdapter) SimpleCount(name string, table string, where string, limit string) (querystr string, err 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")
|
|
}
|
|
|
|
whereStr, err := adapter.buildWhere(where)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
|
|
querystr = "SELECT COUNT(*) AS `count` FROM `" + table + "`" + whereStr + adapter.buildLimit(limit)
|
|
querystr = strings.TrimSpace(querystr)
|
|
adapter.pushStatement(name, "select", querystr)
|
|
return querystr, nil
|
|
}
|
|
|
|
func (adapter *MysqlAdapter) Builder() *prebuilder {
|
|
return &prebuilder{adapter}
|
|
}
|
|
|
|
func (adapter *MysqlAdapter) Write() error {
|
|
var stmts, body string
|
|
for _, name := range adapter.BufferOrder {
|
|
if name[0] == '_' {
|
|
continue
|
|
}
|
|
stmt := adapter.Buffer[name]
|
|
// ? - Table creation might be a little complex for Go to do outside a SQL file :(
|
|
if stmt.Type == "upsert" {
|
|
stmts += "\t" + name + " *qgen.MySQLUpsertCallback\n"
|
|
body += `
|
|
log.Print("Preparing ` + name + ` statement.")
|
|
stmts.` + name + `, err = qgen.PrepareMySQLUpsertCallback(db, "` + stmt.Contents + `")
|
|
if err != nil {
|
|
return err
|
|
}
|
|
`
|
|
} else if stmt.Type != "create-table" {
|
|
stmts += "\t" + name + " *sql.Stmt\n"
|
|
body += `
|
|
log.Print("Preparing ` + name + ` statement.")
|
|
stmts.` + name + `, err = db.Prepare("` + stmt.Contents + `")
|
|
if err != nil {
|
|
return err
|
|
}
|
|
`
|
|
}
|
|
}
|
|
|
|
// TODO: Move these custom queries out of this file
|
|
out := `// +build !pgsql, !sqlite, !mssql
|
|
|
|
/* 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"
|
|
import "./common"
|
|
//import "./query_gen/lib"
|
|
|
|
// nolint
|
|
type Stmts struct {
|
|
` + stmts + `
|
|
getActivityFeedByWatcher *sql.Stmt
|
|
getActivityCountByWatcher *sql.Stmt
|
|
todaysPostCount *sql.Stmt
|
|
todaysTopicCount *sql.Stmt
|
|
todaysReportCount *sql.Stmt
|
|
todaysNewUserCount *sql.Stmt
|
|
|
|
Mocks bool
|
|
}
|
|
|
|
// nolint
|
|
func _gen_mysql() (err error) {
|
|
if common.Dev.DebugMode {
|
|
log.Print("Building the generated statements")
|
|
}
|
|
` + body + `
|
|
return nil
|
|
}
|
|
`
|
|
return writeFile("./gen_mysql.go", out)
|
|
}
|
|
|
|
// Internal methods, not exposed in the interface
|
|
func (adapter *MysqlAdapter) pushStatement(name string, stype string, querystr string) {
|
|
adapter.Buffer[name] = DBStmt{querystr, stype}
|
|
adapter.BufferOrder = append(adapter.BufferOrder, name)
|
|
}
|
|
|
|
func (adapter *MysqlAdapter) stringyType(ctype string) bool {
|
|
ctype = strings.ToLower(ctype)
|
|
return ctype == "varchar" || ctype == "tinytext" || ctype == "text" || ctype == "mediumtext" || ctype == "longtext" || ctype == "char" || ctype == "datetime" || ctype == "timestamp" || ctype == "time" || ctype == "date"
|
|
}
|