68 lines
1.5 KiB
Go
68 lines
1.5 KiB
Go
package processing
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import "strings"
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// LooksLikeMySQLTupleLine reports whether line starts a mysqldump VALUES tuple.
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func LooksLikeMySQLTupleLine(line string) bool {
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s := strings.TrimLeft(line, " \t")
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return strings.HasPrefix(s, "(")
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}
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// ParseMySQLTupleFields parses all fields from the first (...) tuple on the line.
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func ParseMySQLTupleFields(line string) []string {
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return ParseMySQLTupleFieldsN(line, 0)
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}
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// ParseMySQLTupleFieldsN parses up to maxFields (0 = all) from the first (...) tuple.
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func ParseMySQLTupleFieldsN(line string, maxFields int) []string {
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start := strings.Index(line, "(")
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if start < 0 {
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return nil
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}
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body := line[start+1:]
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var out []string
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for i := 0; i < len(body); {
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if maxFields > 0 && len(out) >= maxFields {
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break
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}
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for i < len(body) && (body[i] == ' ' || body[i] == '\t' || body[i] == ',') {
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i++
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}
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if i >= len(body) || body[i] == ')' {
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break
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}
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if body[i] == '\'' {
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i++
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var b strings.Builder
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for i < len(body) {
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ch := body[i]
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if ch == '\\' && i+1 < len(body) {
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b.WriteByte(body[i+1])
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i += 2
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continue
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}
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if ch == '\'' {
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if i+1 < len(body) && body[i+1] == '\'' {
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b.WriteByte('\'')
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i += 2
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continue
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}
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i++
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break
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}
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b.WriteByte(ch)
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i++
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}
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out = append(out, b.String())
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continue
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}
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j := i
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for j < len(body) && body[j] != ',' && body[j] != ')' {
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j++
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}
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out = append(out, strings.TrimSpace(body[i:j]))
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i = j
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}
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return out
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}
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