Select: Add support for locking clauses #55
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8 tasks
lippserd
requested changes
May 19, 2022
| */ | ||
| public function buildFor($lockStrength) | ||
| { | ||
| $sql = []; |
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Why not just return ! empty($lockStrength) ? "FOR $lockStrength" : ""?
| /** | ||
| * Build the locking clause of a query | ||
| * | ||
| * @param ?string $lockStrength |
| * | ||
| * @param string $lockStrength | ||
| * | ||
| * @return self |
| /** | ||
| * Build the locking clause of a query | ||
| * | ||
| * @param ?string $lockStrength |
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I couldn't find the ANSI-SQL definition, but read that this is defined in ANSI-SQL (to an extent, of course). Here is what I found about the implementation in our supported databases:
- MySQL only supports FOR UPDATE
- Oracle and PostgreSQL support is pretty extensive
- DB2 supports FOR UPDATE and FOR READ ONLY
- MSSQL of course does something different and implements this via table hints
Because of the different implementations, I would say locking clause instead of lock strength everywhere. And don't bother with MSSQL for now.
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