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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,147 @@ | ||
| package database | ||
|
|
||
| import ( | ||
| "database/sql" | ||
| "fmt" | ||
| "strings" | ||
|
|
||
| _ "modernc.org/sqlite" | ||
| ) | ||
|
|
||
| type sqliteConnector baseConnector | ||
|
|
||
| func (c *sqliteConnector) GetDbType() DbType { | ||
| return c.dbType | ||
| } | ||
|
|
||
| func getFilenameFromConnectionString(connectionString string) string { | ||
| return strings.Replace(connectionString, "sqlite3://", "", 1) | ||
| } | ||
|
|
||
| func (c *sqliteConnector) Connect() error { | ||
| db, err := sql.Open(c.dbType.String(), getFilenameFromConnectionString(c.connectionString)) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| if err := db.Ping(); err != nil { | ||
| return err | ||
| } | ||
|
|
||
| c.db = db | ||
| return nil | ||
| } | ||
|
|
||
| func (c *sqliteConnector) Close() { | ||
| err := c.db.Close() | ||
| if err != nil { | ||
| fmt.Println("could not close database connection", err) | ||
| } | ||
| } | ||
|
|
||
| func (c *sqliteConnector) GetSchemas() ([]string, error) { | ||
| fileName := getFilenameFromConnectionString(c.connectionString) | ||
| schema := strings.Replace(fileName, ".db", "", 1) | ||
| return []string{schema}, nil | ||
| } | ||
|
|
||
| func (c *sqliteConnector) GetTables(schemaNames []string) ([]TableDetail, error) { | ||
| rows, err := c.db.Query(` | ||
| select distinct tbl_name | ||
| from sqlite_schema | ||
| `) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| var tables []TableDetail | ||
| for rows.Next() { | ||
| table := TableDetail{Schema: schemaNames[0]} | ||
| if err = rows.Scan(&table.Name); err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| table.Name = SanitizeValue(table.Name) | ||
| tables = append(tables, table) | ||
| } | ||
|
|
||
| return tables, nil | ||
| } | ||
|
|
||
| func (c *sqliteConnector) GetColumns(tableName TableDetail) ([]ColumnResult, error) { | ||
| rows, err := c.db.Query(` | ||
| select | ||
| t.name, | ||
| type, | ||
| pk > 0, -- first pk has 1, second has 2 ... | ||
| (case when fk.id is not null then 1 else 0 end) "isForeign", | ||
| (case when t."notnull" = true then false else true end) "nullable", | ||
| coalesce( | ||
| (select (case when i."unique" = true and i.origin = "u" then true else false end) "isUnique" | ||
| from pragma_index_list(:tableName) i | ||
| left join pragma_index_info(i.name) ii | ||
| where ii.name = t.name), | ||
| 0 | ||
| ) "isUnique" | ||
| from pragma_table_info(:tableName) t | ||
| left join pragma_foreign_key_list(:tableName) fk on t.name = fk."from"; | ||
| `, sql.Named("tableName", tableName.Name)) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| var columns []ColumnResult | ||
| for rows.Next() { | ||
| var column ColumnResult | ||
| if err = rows.Scan(&column.Name, &column.DataType, &column.IsPrimary, &column.IsForeign, &column.IsNullable, &column.IsUnique); err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| column.Name = SanitizeValue(column.Name) | ||
| column.DataType = SanitizeValue(column.DataType) | ||
|
|
||
| columns = append(columns, column) | ||
| } | ||
|
|
||
| return columns, nil | ||
| } | ||
|
|
||
| func (c *sqliteConnector) GetConstraints(tableName TableDetail) ([]ConstraintResult, error) { | ||
| rows, err := c.db.Query(` | ||
| select | ||
| pk."table" "pkTableName", | ||
| fk.name "pkTableName", | ||
| pk."from", | ||
| coalesce((select pk > 0 from pragma_table_info(fk.name) ti where ti.name = pk."from"), 0) "isPrimary", -- first pk has 1, second has 2 ... | ||
| coalesce((select count(*) > 1 from pragma_table_info(fk.name) ti where pk > 0), 0) "hasMultiplePK" | ||
| from sqlite_master fk | ||
| join pragma_foreign_key_list(fk.name) pk on pk."table" != fk.name | ||
| where fk.name = :tableName or pk."table" = :tableName | ||
| `, sql.Named("tableName", tableName.Name)) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| var constraints []ConstraintResult | ||
| for rows.Next() { | ||
| constraint := ConstraintResult{ | ||
| PkSchema: tableName.Schema, | ||
| FkSchema: tableName.Schema, // sqlite only has one schema | ||
| } | ||
| err = rows.Scan( | ||
| &constraint.PkTable, | ||
| &constraint.FkTable, | ||
| &constraint.ColumnName, | ||
| &constraint.IsPrimary, | ||
| &constraint.HasMultiplePK, | ||
| ) | ||
|
|
||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| constraints = append(constraints, constraint) | ||
| } | ||
|
|
||
| return constraints, nil | ||
| } |
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