42 lines
1 KiB
Go
42 lines
1 KiB
Go
package migrate
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import (
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"fmt"
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"strings"
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"github.com/dchest/uniuri"
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)
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func fetchColumns(sql string) ([]string, error) {
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if !strings.HasPrefix(sql, "CREATE ") {
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return []string{}, fmt.Errorf("Sql input is not a DDL statement.")
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}
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parenIdx := strings.Index(sql, "(")
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return strings.Split(sql[parenIdx+1:strings.LastIndex(sql, ")")], ","), nil
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}
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func selectName(columns []string) []string {
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var results []string
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for _, column := range columns {
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col := strings.SplitN(strings.Trim(column, " \n\t"), " ", 2)
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results = append(results, col[0])
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}
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return results
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}
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func setForUpdate(left []string, right []string) string {
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var results []string
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for k, str := range left {
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results = append(results, fmt.Sprintf("%s = %s", str, right[k]))
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}
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return strings.Join(results, ", ")
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}
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func proxyName(tableName string) string {
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return fmt.Sprintf("%s_%s", tableName, uniuri.NewLen(16))
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}
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func indexName(tableName string, columns []string) string {
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return fmt.Sprintf("idx_%s_on_%s", tableName, strings.Join(columns, "_and_"))
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}
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