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fix(controllers): keep Sales/Purchase Trends one row per based-on key (MariaDB parity)

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#56192 made the trends queries Postgres-strict-GROUP-BY-valid by widening based_on_group_by
to include the selected descriptive columns. For Item it added t2.item_name, for Customer
t1.territory (and customer_name) — but item_name is an editable per-line field and territory an
editable per-document field, not functionally dependent on the item_code/customer key. On MariaDB
(ONLY_FULL_GROUP_BY off) this SPLITS the single row per key into one row per distinct
(key, item_name)/(key, territory), so a customer transacting across two territories (or an item
with an edited item_name) now shows duplicate rows with fractured per-period subtotals.

Group by the KEY only and aggregate the non-key descriptive columns with Max(): one row per
based-on key (identical to the pre-#56192 MariaDB output) and still Postgres-valid. Supplier
columns are master-joined / fetch-locked (functionally dependent) so they stay unchanged.
This commit is contained in:
Mihir Kandoi
2026-06-21 22:38:30 +05:30
parent 0e0575f27b
commit dbd1388b40
2 changed files with 17 additions and 11 deletions
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23
erpnext/controllers/trends.py
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@@ -369,8 +369,11 @@ def based_wise_columns_query(based_on, trans):
# based_on_cols, based_on_select, based_on_group_by, addl_tables
if based_on == "Item":
based_on_details["based_on_cols"] = ["Item:Link/Item:120", "Item Name:Data:120"]
based_on_details["based_on_select"] = "t2.item_code, t2.item_name,"
based_on_details["based_on_group_by"] = "t2.item_code, t2.item_name"
# item_name is an editable per-line field, not functionally dependent on item_code, so it
# is aggregated (one row per item_code) rather than added to GROUP BY (which would split
# the row and change the MariaDB row count). See get_data's group-by query.
based_on_details["based_on_select"] = "t2.item_code, Max(t2.item_name) as item_name,"
based_on_details["based_on_group_by"] = "t2.item_code"
based_on_details["addl_tables"] = ""
elif based_on == "Item Group":
@@ -386,19 +389,21 @@ def based_wise_columns_query(based_on, trans):
"Party Name:Data:120",
"Territory:Link/Territory:120",
]
based_on_details["based_on_select"] = "t1.party_name, t1.customer_name, t1.territory,"
based_on_details[
"based_on_select"
] = "t1.party_name, Max(t1.customer_name) as customer_name, Max(t1.territory) as territory,"
else:
based_on_details["based_on_cols"] = [
"Customer:Link/Customer:120",
"Customer Name:Data:120",
"Territory:Link/Territory:120",
]
based_on_details["based_on_select"] = "t1.customer, t1.customer_name, t1.territory,"
based_on_details["based_on_group_by"] = (
"t1.party_name, t1.customer_name, t1.territory"
if trans == "Quotation"
else "t1.customer, t1.customer_name, t1.territory"
)
based_on_details[
"based_on_select"
] = "t1.customer, Max(t1.customer_name) as customer_name, Max(t1.territory) as territory,"
# territory (and customer_name) are not functionally dependent on the customer key, so they
# are aggregated rather than grouped — one row per customer, matching the prior MariaDB output.
based_on_details["based_on_group_by"] = "t1.party_name" if trans == "Quotation" else "t1.customer"
based_on_details["addl_tables"] = ""
elif based_on == "Customer Group":