add type checker

Signed-off-by: xinyual <xinyual@amazon.com>

Author: xinyual

core/src/main/java/org/opensearch/sql/calcite/utils/PPLOperandTypes.java

@@ -61,4 +61,9 @@ private PPLOperandTypes() {}
   public static final UDFOperandMetadata DATE_OR_TIMESTAMP_OR_STRING =
       UDFOperandMetadata.wrap(
           (CompositeOperandTypeChecker) OperandTypes.DATE_OR_TIMESTAMP.or(OperandTypes.STRING));
+  public static final UDFOperandMetadata STRING_DATE_OR_TIMESTAMP =
+      UDFOperandMetadata.wrap(
+          (CompositeOperandTypeChecker)
+              OperandTypes.family(SqlTypeFamily.STRING, SqlTypeFamily.DATE)
+                  .or(OperandTypes.family(SqlTypeFamily.STRING, SqlTypeFamily.TIMESTAMP)));
 }

core/src/main/java/org/opensearch/sql/expression/function/udf/condition/EarliestFunction.java

@@ -5,6 +5,7 @@
 
 package org.opensearch.sql.expression.function.udf.condition;
 
+import static org.opensearch.sql.calcite.utils.PPLOperandTypes.STRING_DATE_OR_TIMESTAMP;
 import static org.opensearch.sql.calcite.utils.UserDefinedFunctionUtils.prependFunctionProperties;
 import static org.opensearch.sql.utils.DateTimeUtils.getRelativeZonedDateTime;
 
@@ -26,6 +27,7 @@
 import org.opensearch.sql.data.model.ExprValue;
 import org.opensearch.sql.expression.function.FunctionProperties;
 import org.opensearch.sql.expression.function.ImplementorUDF;
+import org.opensearch.sql.expression.function.UDFOperandMetadata;
 
 public class EarliestFunction extends ImplementorUDF {
   public EarliestFunction() {
@@ -37,6 +39,11 @@ public SqlReturnTypeInference getReturnTypeInference() {
     return ReturnTypes.BOOLEAN;
   }
 
+  @Override
+  public UDFOperandMetadata getOperandMetadata() {
+    return STRING_DATE_OR_TIMESTAMP;
+  }
+
   public static class EarliestImplementor implements NotNullImplementor {
     @Override
     public Expression implement(

core/src/main/java/org/opensearch/sql/expression/function/udf/condition/LatestFunction.java

@@ -5,6 +5,7 @@
 
 package org.opensearch.sql.expression.function.udf.condition;
 
+import static org.opensearch.sql.calcite.utils.PPLOperandTypes.STRING_DATE_OR_TIMESTAMP;
 import static org.opensearch.sql.calcite.utils.UserDefinedFunctionUtils.prependFunctionProperties;
 import static org.opensearch.sql.utils.DateTimeUtils.getRelativeZonedDateTime;
 
@@ -26,6 +27,7 @@
 import org.opensearch.sql.data.model.ExprValue;
 import org.opensearch.sql.expression.function.FunctionProperties;
 import org.opensearch.sql.expression.function.ImplementorUDF;
+import org.opensearch.sql.expression.function.UDFOperandMetadata;
 
 public class LatestFunction extends ImplementorUDF {
   public LatestFunction() {
@@ -37,6 +39,11 @@ public SqlReturnTypeInference getReturnTypeInference() {
     return ReturnTypes.BOOLEAN;
   }
 
+  @Override
+  public UDFOperandMetadata getOperandMetadata() {
+    return STRING_DATE_OR_TIMESTAMP;
+  }
+
   public static class LatestImplementor implements NotNullImplementor {
     @Override
     public Expression implement(

integ-test/build.gradle

@@ -448,8 +448,8 @@ integTest {
 
     dependsOn ':opensearch-sql-plugin:bundlePlugin'
     if(getOSFamilyType() != "windows") {
-        dependsOn startPrometheus
-        finalizedBy stopPrometheus
+        //dependsOn startPrometheus
+        //finalizedBy stopPrometheus
     }
 
     // enable calcite codegen in IT