docs: add new mathematical function

Signed-off-by: xmh1011 <[email protected]>

docs/MatrixOne/Reference/Functions-and-Operators/Mathematical/lg.md

@@ -0,0 +1,35 @@
+# **LG()**
+
+## **Description**
+
+LG(X) returns the base-10 logarithm of X.
+
+## **Syntax**
+
+```
+> LG(X)
+```
+
+## **Arguments**
+
+| Arguments | Description                                    |
+|-----------|------------------------------------------------|
+| X         | Required. Any numeric data type supported now. |
+
+## **Examples**
+
+```sql
+drop table if exists t1;
+create table t1(a float, b float);
+insert into t1 values(10000,3784.159);
+insert into t1 values(2738,682.325);
+
+mysql> select lg(a),lg(b) from t1;
++-------------------+--------------------+
+| lg(a)             | lg(b)              |
++-------------------+--------------------+
+|                 4 |  3.577969368581086 |
+| 3.437433443797971 | 2.8339912916439594 |
++-------------------+--------------------+
+2 rows in set (0.00 sec)
+```

docs/MatrixOne/Reference/Functions-and-Operators/Mathematical/log2.md

@@ -0,0 +1,35 @@
+# **LOG2()**
+
+## **Description**
+
+LOG2(X) returns the base-2 logarithm of X.
+
+## **Syntax**
+
+```
+> LOG2(X)
+```
+
+## **Arguments**
+
+| Arguments | Description                                    |
+|-----------|------------------------------------------------|
+| X         | Required. Any numeric data type supported now. |
+
+## **Examples**
+
+```sql
+drop table if exists t1;
+create table t1(a float, b float);
+insert into t1 values(1024,17.231);
+insert into t1 values(4096,23.331);
+
+mysql>select log2(a),log2(b) from t1;
++---------+-------------------+
+| log2(a) | log2(b)           |
++---------+-------------------+
+|      10 | 4.106934600972237 |
+|      12 | 4.544176200820541 |
++---------+-------------------+
+2 rows in set (0.01 sec)
+```

mkdocs.yml

@@ -459,8 +459,10 @@ nav:
             - COT(): MatrixOne/Reference/Functions-and-Operators/Mathematical/cot.md
             - EXP(): MatrixOne/Reference/Functions-and-Operators/Mathematical/exp.md
             - FLOOR(): MatrixOne/Reference/Functions-and-Operators/Mathematical/floor.md
+            - LG(): MatrixOne/Reference/Functions-and-Operators/Mathematical/lg.md
             - LN(): MatrixOne/Reference/Functions-and-Operators/Mathematical/ln.md
             - LOG(): MatrixOne/Reference/Functions-and-Operators/Mathematical/log.md
+            - LOG2(): MatrixOne/Reference/Functions-and-Operators/Mathematical/log2.md
             - PI(): MatrixOne/Reference/Functions-and-Operators/Mathematical/pi.md
             - POWER(): MatrixOne/Reference/Functions-and-Operators/Mathematical/power.md
             - RAND(): MatrixOne/Reference/Functions-and-Operators/Mathematical/rand.md