Method parseSampleClause

parser/parser_query.go:1216–1239

(pos Pos)

}

func (p *Parser) parseSampleClause(pos Pos) (*SampleClause, error) {
	if err := p.expectKeyword(KeywordSample); err != nil {
		return nil, err
	}
	ratio, err := p.parseRatioExpr(p.Pos())
	if err != nil {
		return nil, err
	}

	var offset *RatioExpr
	if p.matchKeyword(KeywordOffset) {
		_ = p.lexer.consumeToken()
		offset, err = p.parseRatioExpr(p.Pos())
		if err != nil {
			return nil, err
		}
	}

	return &SampleClause{
		SamplePos: pos,
		Ratio:     ratio,
		Offset:    offset,
	}, nil
}

func (p *Parser) parseExplainStmt(pos Pos) (*ExplainStmt, error) {
	if err := p.expectKeyword(KeywordExplain); err != nil {