# `Fun_getPlanDate` (function)


- **Type:** FUNCTION
- **Returns:** `longtext`
- **Deterministic:** NO
- **SQL data access:** CONTAINS SQL

## Parameters

| # | Mode | Name | Type |
|---|---|---|---|
| 1 | IN | `sJson` | `longtext` |
| 2 | IN | `sTableAlias` | `varchar(255)` |
| 3 | IN | `p_sOffWork` | `varchar(255)` |

## Body

_Body is not pre-cached. To inspect: `mysql --defaults-file=~/.my.cnf -e 'SHOW CREATE FUNCTION `Fun_getPlanDate`'`._

## Narrative

**Business context:** Plan-date filter compiler — translates a date-range filter JSON (with `bFilterCondition` ∈ `month`/`week`/`weekpre`/`day`/`daybefore`/`tomorrowbefore`/`aftertomorrowbefore`/`between`) into an `AND <field> BETWEEN ... AND ...` SQL fragment, anchored at the supplied `p_sOffWork` clock-off time and prefixed with the table alias. Lets the production-plan tree query reuse the front-end's relative-date filter widgets.

**What it does:** Parses `bFilterName` / `bFilterCondition` / `bFilterValue` from the JSON, prepends `sTableAlias.` to the field, then branches on `bFilterCondition` to assemble the BETWEEN/< clause against `CURDATE()` / `NOW()` / `LAST_DAY` / `WEEKDAY` offsets; for `between`, splits `bFilterValue` on `,` into the two endpoints.

**Invocation:** Called by `sp_manufacture_productionplaninfotrace` / `*trace1`, `Sp_Manufacture_ProductionPlanInfoTree_Base`, `Sp_Manufacture_ProductionPlanInfoTree_Base_TC` — the production-plan tree-loading procedures. Used together with `Fun_getOneByKey` / `Fun_HasJsonKey` / `Fun_RemoveJsonKey` to rebuild the WHERE clause from the front-end filter payload.