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package database |
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import ( |
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"database/sql" |
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"fmt" |
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"github.com/fraenky8/tables-to-go/pkg/settings" |
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// sqlite3 database driver |
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_ "github.com/mattn/go-sqlite3" |
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) |
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// SQLite implemenmts the Database interface with help of generalDatabase |
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type SQLite struct { |
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*GeneralDatabase |
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} |
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// NewSQLite creates a new SQLite database |
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func NewSQLite(s *settings.Settings) *SQLite { |
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return &SQLite{ |
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GeneralDatabase: &GeneralDatabase{ |
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Settings: s, |
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driver: dbTypeToDriverMap[s.DbType], |
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}, |
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} |
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} |
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func (s *SQLite) Connect() (err error) { |
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return s.GeneralDatabase.Connect(s.DSN(s.Settings)) |
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} |
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func (s *SQLite) DSN(settings *settings.Settings) string { |
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return fmt.Sprintf("%v", settings.DbName) |
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} |
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func (s *SQLite) GetDriverImportLibrary() string { |
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return `"github.com/mattn/go-sqlite3"` |
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} |
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func (s *SQLite) GetTables() (tables []*Table, err error) { |
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err = s.Select(&tables, ` |
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SELECT name AS table_name |
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FROM sqlite_master |
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WHERE type = 'table' |
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AND name NOT LIKE 'sqlite?_%' escape '?' |
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`) |
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if s.Verbose { |
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if err != nil { |
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fmt.Println("> Error at GetTables()") |
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fmt.Printf("> database: %q\r\n", s.DbName) |
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} |
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} |
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return tables, err |
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} |
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func (s *SQLite) PrepareGetColumnsOfTableStmt() (err error) { |
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return nil |
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} |
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func (s *SQLite) GetColumnsOfTable(table *Table) (err error) { |
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rows, err := s.Queryx(` |
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SELECT * |
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FROM PRAGMA_TABLE_INFO('` + table.Name + `') |
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`) |
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if err != nil { |
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if s.Verbose { |
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fmt.Printf("> Error at GetColumnsOfTable(%v)\r\n", table.Name) |
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fmt.Printf("> database: %q\r\n", s.DbName) |
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} |
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return err |
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} |
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type column struct { |
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CID int `db:"cid"` |
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Name string `db:"name"` |
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DataType string `db:"type"` |
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NotNull int `db:"notnull"` |
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DefaultValue sql.NullString `db:"dflt_value"` |
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PrimaryKey int `db:"pk"` |
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} |
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for rows.Next() { |
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var col column |
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err = rows.StructScan(&col) |
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if err != nil { |
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return err |
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} |
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isNullable := "YES" |
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if col.NotNull == 1 { |
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isNullable = "NO" |
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} |
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isPrimaryKey := "" |
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if col.PrimaryKey == 1 { |
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isPrimaryKey = "PK" |
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} |
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table.Columns = append(table.Columns, Column{ |
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OrdinalPosition: col.CID, |
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Name: col.Name, |
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DataType: col.DataType, |
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DefaultValue: col.DefaultValue, |
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IsNullable: isNullable, |
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CharacterMaximumLength: sql.NullInt64{}, |
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NumericPrecision: sql.NullInt64{}, |
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// reuse mysql column_key as primary key indicator |
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ColumnKey: isPrimaryKey, |
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Extra: "", |
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ConstraintName: sql.NullString{}, |
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ConstraintType: sql.NullString{}, |
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}) |
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} |
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return nil |
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} |
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func (s *SQLite) IsPrimaryKey(column Column) bool { |
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return column.ColumnKey == "PK" |
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} |
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func (s *SQLite) IsAutoIncrement(column Column) bool { |
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return column.ColumnKey == "PK" |
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} |
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func (s *SQLite) GetStringDatatypes() []string { |
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return []string{ |
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"text", |
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} |
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} |
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func (s *SQLite) IsString(column Column) bool { |
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return s.IsStringInSlice(column.DataType, s.GetStringDatatypes()) |
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} |
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func (s *SQLite) GetTextDatatypes() []string { |
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return []string{ |
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"text", |
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} |
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} |
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func (s *SQLite) IsText(column Column) bool { |
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return s.IsStringInSlice(column.DataType, s.GetTextDatatypes()) |
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} |
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func (s *SQLite) GetIntegerDatatypes() []string { |
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return []string{ |
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"integer", |
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} |
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} |
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func (s *SQLite) IsInteger(column Column) bool { |
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return s.IsStringInSlice(column.DataType, s.GetIntegerDatatypes()) |
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} |
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func (s *SQLite) GetFloatDatatypes() []string { |
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return []string{ |
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"real", |
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"numeric", |
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} |
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} |
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func (s *SQLite) IsFloat(column Column) bool { |
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return s.IsStringInSlice(column.DataType, s.GetFloatDatatypes()) |
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} |
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func (s *SQLite) GetTemporalDatatypes() []string { |
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return []string{} |
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} |
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func (s *SQLite) IsTemporal(column Column) bool { |
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return false |
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} |
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func (s *SQLite) GetTemporalDriverDataType() string { |
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return "" |
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} |
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fraenky8 /
tables-to-go
