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32 lines
600 B
Go
32 lines
600 B
Go
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package render
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import (
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"github.com/neilotoole/sq/libsq/ast"
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"github.com/neilotoole/sq/libsq/core/errz"
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)
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func doOperator(rc *Context, op *ast.OperatorNode) (string, error) {
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if op == nil {
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return "", nil
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}
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val, ok := rc.Dialect.Ops[op.Text()]
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if !ok {
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return "", errz.Errorf("invalid operator: %s", op.Text())
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}
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rhs := ast.NodeNextSibling(op)
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if lit, ok := rhs.(*ast.LiteralNode); ok && lit.Text() == "null" {
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switch op.Text() {
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case "==":
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val = "IS"
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case "!=":
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val = "IS NOT"
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default:
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return "", errz.Errorf("invalid operator for null")
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}
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}
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return val, nil
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}
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