Fixed salary structure employee patches
diff --git a/erpnext/patches.txt b/erpnext/patches.txt
index 20def27..7d069ec 100644
--- a/erpnext/patches.txt
+++ b/erpnext/patches.txt
@@ -379,7 +379,6 @@
 erpnext.patches.v7_2.arrear_leave_encashment_as_salary_component
 erpnext.patches.v7_2.rename_att_date_attendance
 erpnext.patches.v7_2.update_attendance_docstatus
-erpnext.patches.v7_2.move_dates_from_salary_structure_to_employee
 erpnext.patches.v7_2.make_all_assessment_group
 erpnext.patches.v8_0.repost_reserved_qty_for_multiple_sales_uom
 erpnext.patches.v8_0.addresses_linked_to_lead
@@ -445,7 +444,6 @@
 erpnext.patches.v8_8.add_new_fields_in_accounts_settings
 erpnext.patches.v8_9.set_print_zero_amount_taxes
 erpnext.patches.v8_9.set_default_customer_group
-erpnext.patches.v8_9.remove_employee_from_salary_structure_parent
 erpnext.patches.v8_9.delete_gst_doctypes_for_outside_india_accounts
 erpnext.patches.v8_9.set_default_fields_in_variant_settings
 erpnext.patches.v8_9.update_billing_gstin_for_indian_account
diff --git a/erpnext/patches/v11_0/create_salary_structure_assignments.py b/erpnext/patches/v11_0/create_salary_structure_assignments.py
index 712269a..596fe84 100644
--- a/erpnext/patches/v11_0/create_salary_structure_assignments.py
+++ b/erpnext/patches/v11_0/create_salary_structure_assignments.py
@@ -7,21 +7,32 @@
 from erpnext.hr.doctype.salary_structure_assignment.salary_structure_assignment import DuplicateAssignment
 
 def execute():
+	frappe.reload_doc('hr', 'doctype', 'salary_structure')
 	frappe.reload_doc("hr", "doctype", "salary_structure_assignment")
 	frappe.db.sql("""
 		delete from `tabSalary Structure Assignment`
 		where salary_structure in (select name from `tabSalary Structure` where is_active='No' or docstatus!=1)
 	""")
-	for d in frappe.db.sql("""
-		select sse.*, ss.company
-		from `tabSalary Structure Employee` sse, `tabSalary Structure` ss
-		where ss.name = sse.parent AND ss.is_active='Yes'
-		AND sse.employee in (select name from `tabEmployee` where ifNull(status, '') != 'Left')""", as_dict=1):
+	if frappe.db.table_exists('Salary Structure Employee'):
+		ss_details = frappe.db.sql("""
+			select sse.employee, sse.employee_name, sse.from_date, sse.to_date,
+				sse.base, sse.variable, sse.parent as salary_structure, ss.company
+			from `tabSalary Structure Employee` sse, `tabSalary Structure` ss
+			where ss.name = sse.parent AND ss.is_active='Yes'
+			AND sse.employee in (select name from `tabEmployee` where ifNull(status, '') != 'Left')""", as_dict=1)
+	else:
+		ss_details = frappe.db.sql("""
+			select name as salary_structure, employee, employee_name, from_date, to_date, base, variable, company
+			from `tabSalary Structure`
+			where is_active='Yes'
+			AND sse.employee in (select name from `tabEmployee` where ifNull(status, '') != 'Left')""", as_dict=1)
+	
+	for d in ss_details:
 		try:
 			s = frappe.new_doc("Salary Structure Assignment")
 			s.employee = d.employee
 			s.employee_name = d.employee_name
-			s.salary_structure = d.parent
+			s.salary_structure = d.salary_structure
 			s.from_date = d.from_date
 			s.to_date = d.to_date if isinstance(d.to_date, datetime) else None
 			s.base = d.base
diff --git a/erpnext/patches/v7_0/move_employee_parent_to_child_in_salary_structure.py b/erpnext/patches/v7_0/move_employee_parent_to_child_in_salary_structure.py
deleted file mode 100644
index b5172db..0000000
--- a/erpnext/patches/v7_0/move_employee_parent_to_child_in_salary_structure.py
+++ /dev/null
@@ -1,17 +0,0 @@
-import frappe
-
-def execute():
-	frappe.reload_doc('hr', 'doctype', 'salary_structure')
-	frappe.reload_doc('hr', 'doctype', 'salary_structure_employee')
-	if not frappe.db.has_column('Salary Structure', 'employees'):
-		return
-	for ss in frappe.db.sql(""" select employee, name from `tabSalary Structure`""", as_dict=True):
-		ss_doc = frappe.get_doc('Salary Structure', ss.name)
-		salary_employee = ss_doc.append('employees',{})
-		salary_employee.employee = ss.employee
-		salary_employee.base = 0
-		if not ss_doc.company:
-			ss_doc.company = frappe.db.get_value('Employee', salary_employee.employee, 'company')
-		ss_doc.flags.ignore_validate = True
-		ss_doc.flags.ignore_mandatory = True
-		ss_doc.save()
diff --git a/erpnext/patches/v7_2/move_dates_from_salary_structure_to_employee.py b/erpnext/patches/v7_2/move_dates_from_salary_structure_to_employee.py
deleted file mode 100644
index 98e076e..0000000
--- a/erpnext/patches/v7_2/move_dates_from_salary_structure_to_employee.py
+++ /dev/null
@@ -1,9 +0,0 @@
-import frappe
-
-def execute():
-	frappe.reload_doc('hr', 'doctype', 'salary_structure_employee')
-	salary_structures = frappe.db.sql("""select name, to_date, from_date from `tabSalary Structure`""", as_dict=True)
-
-	for salary_structure in salary_structures:
-		frappe.db.sql(""" update `tabSalary Structure Employee` set from_date = %s, to_date = %s
-			where parent = %s """, (salary_structure.from_date, salary_structure.to_date or 'null', salary_structure.name))
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