HHH-19365 - Solve gaussdb function support

Author: SweetWuXiaoMei

hibernate-core/src/main/java/org/hibernate/dialect/GaussDBDialect.java

@@ -565,37 +565,19 @@ public void initializeFunctionRegistry(FunctionContributions functionContributio
 		functionFactory.array_gaussdb();
 		functionFactory.arrayAggregate();
 		functionFactory.arrayRemoveIndex_gaussdb();
-		functionFactory.arrayLength_cardinality();
 		functionFactory.arrayConcat_gaussdb();
 		functionFactory.arrayPrepend_gaussdb();
 		functionFactory.arrayAppend_gaussdb();
 		functionFactory.arrayContains_gaussdb();
 		functionFactory.arrayIntersects_gaussdb();
-		functionFactory.arrayGet_bracket();
 		functionFactory.arrayRemove_gaussdb();
 		functionFactory.arraySlice_operator();
 		functionFactory.arrayReplace_gaussdb();
 		functionFactory.arraySet_gaussdb();
-		functionFactory.arrayTrim_gaussdb();
 		functionFactory.arrayFill_gaussdb();
-		functionFactory.arrayPosition_gaussdb();
 
-		functionFactory.jsonValue_gaussdb(true);
-		functionFactory.jsonQuery_gaussdb();
-		functionFactory.jsonExists_gaussdb();
-		functionFactory.jsonArray();
 		functionFactory.jsonObject_gaussdb();
-		functionFactory.jsonArrayAgg_gaussdb( true );
 		functionFactory.jsonObjectAgg_gaussdb( true );
-		functionFactory.jsonTable();
-
-		functionFactory.jsonSet_gaussdb();
-		functionFactory.jsonRemove_gaussdb();
-		functionFactory.jsonReplace_gaussdb();
-		functionFactory.jsonInsert_gaussdb();
-		functionFactory.jsonArray_gaussdb();
-		functionFactory.jsonMergepatch_gaussdb();
-		functionFactory.jsonArrayInsert_gauss();
 
 		functionFactory.xmlelement();
 		functionFactory.xmlcomment();
@@ -605,7 +587,6 @@ public void initializeFunctionRegistry(FunctionContributions functionContributio
 		functionFactory.xmlquery_gaussdb();
 		functionFactory.xmlexists();
 		functionFactory.xmlagg();
-		functionFactory.xmltable( true );
 
 		functionFactory.makeDateTimeTimestamp();
 		// Note that GaussDB doesn't support the OVER clause for ordered set-aggregate functions
@@ -633,8 +614,6 @@ public void initializeFunctionRegistry(FunctionContributions functionContributio
 		functionContributions.getFunctionRegistry().registerAlternateKey( "truncate", "trunc" );
 		functionFactory.dateTrunc();
 
-		functionFactory.unnest( null, "ordinality" );
-
 		functionFactory.hex( "encode(?1, 'hex')" );
 		functionFactory.sha( "sha256(?1)" );
 		functionFactory.md5( "decode(md5(?1), 'hex')" );
@@ -1057,6 +1036,11 @@ public IdentityColumnSupport getIdentityColumnSupport() {
 		return GaussDBIdentityColumnSupport.INSTANCE;
 	}
 
+	@Override
+	public boolean supportsExpectedLobUsagePattern() {
+		return false;
+	}
+
 	@Override
 	public NationalizationSupport getNationalizationSupport() {
 		return NationalizationSupport.IMPLICIT;
@@ -1127,7 +1111,7 @@ public String translateExtractField(TemporalUnit unit) {
 
 	@Override
 	public AggregateSupport getAggregateSupport() {
-		return GaussDBAggregateSupport.valueOf( this );
+		return null;
 	}
 
 	@Override
@@ -1327,7 +1311,12 @@ public boolean supportsLateral() {
 
 	@Override
 	public boolean supportsRecursiveCTE() {
-		return true;
+		return false;
+	}
+
+	@Override
+	public boolean supportsOrderByInSubquery() {
+		return false;
 	}
 
 	@Override

hibernate-core/src/main/java/org/hibernate/dialect/function/CommonFunctionFactory.java

@@ -2768,7 +2768,6 @@ public void arrayContains_postgresql() {
 	 * GaussDB array contains operator
 	 */
 	public void arrayContains_gaussdb() {
-		functionRegistry.register( "array_contains", new GaussDBArrayContainsOperatorFunction( false, typeConfiguration ) );
 		functionRegistry.register( "array_contains_nullable", new GaussDBArrayContainsOperatorFunction( true, typeConfiguration ) );
 		functionRegistry.register( "array_includes", new ArrayIncludesOperatorFunction( false, typeConfiguration ) );
 		functionRegistry.register( "array_includes_nullable", new ArrayIncludesOperatorFunction( true, typeConfiguration ) );
@@ -2859,13 +2858,6 @@ public void arrayPosition_postgresql() {
 		functionRegistry.register( "array_position", new PostgreSQLArrayPositionFunction( typeConfiguration ) );
 	}
 
-	/**
-	 * GaussDB array_position() function
-	 */
-	public void arrayPosition_gaussdb() {
-		functionRegistry.register( "array_position", new GaussDBArrayPositionFunction( typeConfiguration ) );
-	}
-
 	/**
 	 * H2 array_position() function
 	 */
@@ -3345,13 +3337,6 @@ public void arrayTrim_oracle() {
 		functionRegistry.register( "array_trim", new OracleArrayTrimFunction() );
 	}
 
-	/**
-	 * GaussDB array_trim() emulation for versions before 14
-	 */
-	public void arrayTrim_gaussdb() {
-		functionRegistry.register( "array_trim", new GaussDBArrayTrimFunction() );
-	}
-
 	/**
 	 * H2 array_fill() function
 	 */

hibernate-core/src/main/java/org/hibernate/dialect/identity/GaussDBIdentityColumnSupport.java

@@ -16,7 +16,7 @@ public class GaussDBIdentityColumnSupport extends IdentityColumnSupportImpl {
 	public static final GaussDBIdentityColumnSupport INSTANCE = new GaussDBIdentityColumnSupport();
 	@Override
 	public boolean supportsIdentityColumns() {
-		return true;
+		return false;
 	}
 
 	@Override