Remove redundant TPC-C index on Order. (#311)

Co-authored-by: Andy Pavlo <pavlo@cs.brown.edu>

Author: mbutrovich

src/main/resources/benchmarks/tpcc/ddl-myrocks.sql

@@ -1,5 +1,5 @@
 -- TODO: C_SINCE ON UPDATE CURRENT_TIMESTAMP,
--- Copied from mysql , except that MyRocks does not support foreign keys 
+-- Copied from mysql , except that MyRocks does not support foreign keys
 
 -- woonhak, turn off foreign key check, reference tpcc-mysql and tpcc specification
 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0;
@@ -160,7 +160,7 @@ CREATE INDEX IDX_CUSTOMER_NAME ON CUSTOMER (C_W_ID,C_D_ID,C_LAST,C_FIRST);
 
 -- already created
 -- CREATE INDEX IDX_CUSTOMER ON CUSTOMER (C_W_ID,C_D_ID,C_LAST,C_FIRST);
-CREATE INDEX IDX_ORDER ON OORDER (O_W_ID,O_D_ID,O_C_ID,O_ID);
+-- CREATE INDEX IDX_ORDER ON OORDER (O_W_ID,O_D_ID,O_C_ID,O_ID);
 -- tpcc-mysql create two indexes for the foreign key constraints, Is it really necessary?
 -- CREATE INDEX FKEY_STOCK_2 ON STOCK (S_I_ID);
 -- CREATE INDEX FKEY_ORDER_LINE_2 ON ORDER_LINE (OL_SUPPLY_W_ID,OL_I_ID);

src/main/resources/benchmarks/tpcc/ddl-mysql.sql

@@ -150,7 +150,6 @@ CREATE TABLE order_line (
 );
 
 CREATE INDEX idx_customer_name ON customer (c_w_id, c_d_id, c_last, c_first);
-CREATE INDEX idx_order ON oorder (o_w_id, o_d_id, o_c_id, o_id);
 
 SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS;
 SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS;

src/main/resources/benchmarks/tpcc/ddl-noisepage.sql

@@ -147,4 +147,3 @@ CREATE TABLE order_line (
 );
 
 CREATE INDEX idx_customer_name ON customer (c_w_id, c_d_id, c_last);
-CREATE INDEX idx_order ON oorder (o_w_id, o_d_id, o_c_id, o_id);

src/main/resources/benchmarks/tpcc/ddl-postgres.sql

@@ -146,5 +146,4 @@ CREATE TABLE order_line (
     PRIMARY KEY (ol_w_id, ol_d_id, ol_o_id, ol_number)
 );
 
-CREATE INDEX idx_customer_name ON customer (c_w_id, c_d_id, c_last, c_first);
-CREATE INDEX idx_order ON oorder (o_w_id, o_d_id, o_c_id, o_id);
+CREATE INDEX idx_customer_name ON customer (c_w_id, c_d_id, c_last, c_first);

src/main/resources/benchmarks/tpcc/ddl-singlestore.sql

@@ -159,7 +159,7 @@ CREATE INDEX IDX_CUSTOMER_NAME ON CUSTOMER (C_W_ID,C_D_ID,C_LAST,C_FIRST);
 
 -- already created
 -- CREATE INDEX IDX_CUSTOMER ON CUSTOMER (C_W_ID,C_D_ID,C_LAST,C_FIRST);
-CREATE INDEX IDX_ORDER ON OORDER (O_W_ID,O_D_ID,O_C_ID,O_ID);
+-- CREATE INDEX IDX_ORDER ON OORDER (O_W_ID,O_D_ID,O_C_ID,O_ID);
 -- tpcc-mysql create two indexes for the foreign key constraints, Is it really necessary?
 -- CREATE INDEX FKEY_STOCK_2 ON STOCK (S_I_ID);
 -- CREATE INDEX FKEY_ORDER_LINE_2 ON ORDER_LINE (OL_SUPPLY_W_ID,OL_I_ID);