mysql statement function (#3753)

sharding-sql-test/src/main/resources/sql/sharding/dql/select.xml

@@ -52,4 +52,6 @@
     <sql-case id="select_with_left_function" value="SELECT CONCAT(LEFT(status, 7), 'test') FROM t_order_item WHERE user_id = 10" db-types="MySQL" />
     <sql-case id="select_for_update" value="SELECT * FROM t_order WHERE user_id = ? FOR UPDATE" lock-clause="true"/>
     <sql-case id="select_database" value="SELECT DATABASE()" db-types="MySQL" />
+    <sql-case id="select_with_mod_function" value="SELECT * FROM t_order WHERE MOD(order_id, 1) = 1" db-types="MySQL" />
+    <sql-case id="select_with_date_function" value="SELECT * FROM t_order WHERE DATE_FORMAT(current_date, '%Y-%m-%d') = '2019-12-18' ORDER BY order_id" db-types="MySQL" />
 </sql-cases>

shardingsphere-sql-parser/shardingsphere-sql-parser-mysql/src/main/antlr4/imports/mysql/BaseRule.g4

@@ -438,8 +438,10 @@ regularFunction_
     ;
 
 regularFunctionName_
-    : identifier_ | IF | CURRENT_TIMESTAMP | LOCALTIME | LOCALTIMESTAMP | NOW | REPLACE | INTERVAL | SUBSTRING | LEFT | RIGHT
-    | LOWER | UNIX_TIMESTAMP | UPPER | DATABASE | STR_TO_DATE | AES_DECRYPT | AES_ENCRYPT | FROM_BASE64 | TO_BASE64
+    : identifier_ | IF | CURRENT_TIMESTAMP | UNIX_TIMESTAMP | LOCALTIME | LOCALTIMESTAMP | NOW | REPLACE | INTERVAL | SUBSTRING | MOD
+    | DATABASE | LEFT | RIGHT | LOWER | UPPER | DATE | DATEDIFF | DATE_FORMAT | DAY | DAYNAME | DAYOFMONTH | DAYOFWEEK | DAYOFYEAR
+    | STR_TO_DATE | TIME | TIMEDIFF | TIMESTAMP | TIMESTAMPADD | TIMESTAMPDIFF | TIME_FORMAT | TIME_TO_SEC | AES_DECRYPT | AES_ENCRYPT
+    | FROM_BASE64 | TO_BASE64
     ;
 
 matchExpression_

shardingsphere-sql-parser/shardingsphere-sql-parser-mysql/src/main/antlr4/imports/mysql/MySQLKeyword.g4

@@ -1516,10 +1516,54 @@ UPPER
     : U P P E R
     ;
 
+DATEDIFF
+    : D A T E D I F F
+    ;
+
+DATE_FORMAT
+    : D A T E UL_ F O R M A T
+    ;
+
+DAYNAME
+    : D A Y N A M E
+    ;
+
+DAYOFMONTH
+    : D A Y O F M O N T H
+    ;
+
+DAYOFWEEK
+    : D A Y O F W E E K
+    ;
+
+DAYOFYEAR
+    : D A Y O F Y E A R
+    ;
+
 STR_TO_DATE
     : S T R UL_ T O UL_ D A T E
     ;
 
+TIMEDIFF
+    : T I M E D I F F
+    ;
+
+TIMESTAMPADD
+    : T I M E S T A M P A D D
+    ;
+
+TIMESTAMPDIFF
+    : T I M E S T A M P D I F F
+    ;
+
+TIME_FORMAT
+     : T I M E UL_ F O R M A T
+     ;
+
+TIME_TO_SEC
+    : T I M E UL_ T O UL_ S E C
+    ;
+
 AES_DECRYPT
     : A E S UL_ D E C R Y P T
     ;

shardingsphere-sql-parser/shardingsphere-sql-parser-test/src/test/resources/sharding/dml/select.xml

@@ -1169,4 +1169,30 @@
             </expression-items>
         </select-items>
     </parser-result>
+    <parser-result sql-case-id="select_with_mod_function">
+        <tables>
+            <table name="t_order"/>
+        </tables>
+        <tokens>
+            <table-token start-index="14" table-name="t_order" length="7" />
+        </tokens>
+        <select-items start-index="7" stop-index="7">
+            <shorthand-select-items>
+                <shorthand-select-item start-index="7" stop-index="7" text="*" />
+            </shorthand-select-items>
+        </select-items>
+    </parser-result>
+    <parser-result sql-case-id="select_with_date_function">
+        <tables>
+            <table name="t_order"/>
+        </tables>
+        <tokens>
+            <table-token start-index="14" table-name="t_order" length="7" />
+        </tokens>
+        <select-items start-index="7" stop-index="7">
+            <shorthand-select-items>
+                <shorthand-select-item start-index="7" stop-index="7" text="*" />
+            </shorthand-select-items>
+        </select-items>
+    </parser-result>
 </parser-result-sets>