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Add support for scientific notation for doubles

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This commit is contained in:
Asdine El Hrychy
2021-07-25 22:36:31 -04:00
parent bba4c0a630
commit d3b81ad6f1
9 changed files with 169 additions and 19 deletions
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19
internal/sql/parser/expr.go
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@@ -261,6 +261,16 @@ func (p *Parser) parseUnaryExpr(allowed ...scanner.Token) (expr.Expr, error) {
return nil, &ParseError{Message: "unable to parse number", Pos: pos}
}
return expr.LiteralValue{Value: types.NewDoubleValue(v)}, nil
case scanner.ADD, scanner.SUB:
sign := tok
tok, pos, lit = p.Scan()
if tok != scanner.NUMBER && tok != scanner.INTEGER {
return nil, &ParseError{Message: "syntax error", Pos: pos}
}
if sign == scanner.SUB {
lit = "-" + lit
}
fallthrough
case scanner.INTEGER:
v, err := strconv.ParseInt(lit, 10, 64)
if err != nil {
@@ -329,6 +339,15 @@ func (p *Parser) parseUnaryExpr(allowed ...scanner.Token) (expr.Expr, error) {
// parseInteger parses an integer.
func (p *Parser) parseInteger() (int64, error) {
tok, pos, lit := p.ScanIgnoreWhitespace()
if tok == scanner.ADD || tok == scanner.SUB {
sign := tok
tok, pos, lit = p.Scan()
if sign == scanner.SUB {
lit = "-" + lit
}
}
if tok != scanner.INTEGER {
return 0, newParseError(scanner.Tokstr(tok, lit), []string{"integer"}, pos)
}