refactor: 优化函数支持

Author: zhou-hao

hsweb-easy-orm-rdb/src/main/java/org/hswebframework/ezorm/rdb/metadata/RDBSchemaMetadata.java

@@ -10,6 +10,7 @@
 import org.hswebframework.ezorm.rdb.operator.builder.fragments.ddl.CommonCreateIndexSqlBuilder;
 import org.hswebframework.ezorm.rdb.operator.builder.fragments.ddl.CommonCreateTableSqlBuilder;
 import org.hswebframework.ezorm.rdb.operator.builder.fragments.ddl.CommonDropIndexSqlBuilder;
+import org.hswebframework.ezorm.rdb.operator.builder.fragments.function.SimpleFunctionFragmentBuilder;
 import org.hswebframework.ezorm.rdb.operator.builder.fragments.term.DefaultForeignKeyTermFragmentBuilder;
 import org.hswebframework.ezorm.rdb.utils.FeatureUtils;
 import reactor.core.publisher.Flux;
@@ -67,6 +68,11 @@ public RDBSchemaMetadata(String name) {
             addFeature(RDBFeatures.min);
             addFeature(RDBFeatures.avg);
 
+            addFeature(new SimpleFunctionFragmentBuilder("stddev", "标准差"));
+            addFeature(new SimpleFunctionFragmentBuilder("variance", "方差"));
+            addFeature(new SimpleFunctionFragmentBuilder("stddev_pop", "标准差(总体)"));
+            addFeature(new SimpleFunctionFragmentBuilder("stddev_samp", "标准差(样本)"));
+
 
             /* DDL */
 

hsweb-easy-orm-rdb/src/main/java/org/hswebframework/ezorm/rdb/operator/builder/fragments/function/SimpleFunctionFragmentBuilder.java

@@ -17,6 +17,12 @@ public class SimpleFunctionFragmentBuilder implements FunctionFragmentBuilder {
 
     private final SqlFragments FUNCTION;
 
+    public SimpleFunctionFragmentBuilder(String function, String alias, String name) {
+        this.function = function;
+        this.name = name;
+        FUNCTION = SqlFragments.single(alias + "(");
+    }
+
     public SimpleFunctionFragmentBuilder(String function, String name) {
         this.function = function;
         this.name = name;

hsweb-easy-orm-rdb/src/main/java/org/hswebframework/ezorm/rdb/supports/mssql/SqlServerSchemaMetadata.java

@@ -4,6 +4,7 @@
 import org.hswebframework.ezorm.rdb.metadata.RDBSchemaMetadata;
 import org.hswebframework.ezorm.rdb.metadata.RDBTableMetadata;
 import org.hswebframework.ezorm.rdb.metadata.dialect.Dialect;
+import org.hswebframework.ezorm.rdb.operator.builder.fragments.function.SimpleFunctionFragmentBuilder;
 
 public class SqlServerSchemaMetadata extends RDBSchemaMetadata {
 
@@ -16,14 +17,18 @@ public SqlServerSchemaMetadata(String name) {
         addFeature(new SqlServerIndexMetadataParser(this));
         addFeature(Dialect.MSSQL);
         addFeature(new SqlServerQuerySqlBuilder(this));
+        addFeature(new SimpleFunctionFragmentBuilder("stddev_pop", "stdevp", "标准差(总体)"));
+        addFeature(new SimpleFunctionFragmentBuilder("stddev_samp", "stdev", "标准差(样本)"));
+
+
     }
 
     @Override
     public RDBTableMetadata newTable(String name) {
-        RDBTableMetadata metadata=super.newTable(name);
+        RDBTableMetadata metadata = super.newTable(name);
         metadata.addFeature(new SqlServerBatchUpsertOperator(metadata));
-        metadata.setOnColumnAdded(column->{
-            if(column.getValueCodec() instanceof EnumValueCodec &&((EnumValueCodec) column.getValueCodec()).isToMask()){
+        metadata.setOnColumnAdded(column -> {
+            if (column.getValueCodec() instanceof EnumValueCodec && ((EnumValueCodec) column.getValueCodec()).isToMask()) {
                 column.addFeature(SqlServerEnumInFragmentBuilder.in);
                 column.addFeature(SqlServerEnumInFragmentBuilder.notIn);
             }