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Rails 6: Add an :if_not_exists option to create_table #779

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Merged
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Apr 24, 2020
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Rails 6: Add an :if_not_exists option to create_table #779

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15 changes: 13 additions & 2 deletions lib/active_record/connection_adapters/sqlserver/schema_creation.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -6,15 +6,26 @@ class SchemaCreation < AbstractAdapter::SchemaCreation
private

def visit_TableDefinition(o)
if_not_exists = o.if_not_exists

if o.as
table_name = quote_table_name(o.temporary ? "##{o.name}" : o.name)
query = o.as.respond_to?(:to_sql) ? o.as.to_sql : o.as
projections, source = query.match(%r{SELECT\s+(.*)?\s+FROM\s+(.*)?}).captures
select_into = "SELECT #{projections} INTO #{table_name} FROM #{source}"
sql = "SELECT #{projections} INTO #{table_name} FROM #{source}"
else
o.instance_variable_set :@as, nil
super
o.instance_variable_set :@if_not_exists, false
sql = super
end

if if_not_exists
o.instance_variable_set :@if_not_exists, true
table_name = o.temporary ? "##{o.name}" : o.name
sql = "IF NOT EXISTS (SELECT * FROM sysobjects WHERE name='#{table_name}' and xtype='U') #{sql}"
end

sql
end

def add_column_options!(sql, options)
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