| 14 | } |
| 15 | |
| 16 | func (n *BoolExpr) Format(buf *TrackedBuffer, d format.Dialect) { |
| 17 | if n == nil { |
| 18 | return |
| 19 | } |
| 20 | switch n.Boolop { |
| 21 | case BoolExprTypeIsNull: |
| 22 | if items(n.Args) && len(n.Args.Items) > 0 { |
| 23 | buf.astFormat(n.Args.Items[0], d) |
| 24 | } |
| 25 | buf.WriteString(" IS NULL") |
| 26 | case BoolExprTypeIsNotNull: |
| 27 | if items(n.Args) && len(n.Args.Items) > 0 { |
| 28 | buf.astFormat(n.Args.Items[0], d) |
| 29 | } |
| 30 | buf.WriteString(" IS NOT NULL") |
| 31 | case BoolExprTypeNot: |
| 32 | // NOT expression: format as NOT <arg> |
| 33 | buf.WriteString("NOT ") |
| 34 | if items(n.Args) && len(n.Args.Items) > 0 { |
| 35 | buf.astFormat(n.Args.Items[0], d) |
| 36 | } |
| 37 | default: |
| 38 | buf.WriteString("(") |
| 39 | if items(n.Args) { |
| 40 | switch n.Boolop { |
| 41 | case BoolExprTypeAnd: |
| 42 | buf.join(n.Args, d, " AND ") |
| 43 | case BoolExprTypeOr: |
| 44 | buf.join(n.Args, d, " OR ") |
| 45 | } |
| 46 | } |
| 47 | buf.WriteString(")") |
| 48 | } |
| 49 | } |