fix(db): rm mysql + better name research

src/main/java/fr/titionfire/ffsaf/data/CustomPostgreSQLDialect.java

@@ -0,0 +1,35 @@
+package fr.titionfire.ffsaf.data;
+
+import org.hibernate.boot.model.FunctionContributions;
+import org.hibernate.dialect.PostgreSQLDialect;
+import org.hibernate.query.sqm.function.SqmFunctionRegistry;
+import org.hibernate.query.sqm.produce.function.FunctionParameterType;
+import org.hibernate.type.BasicType;
+import org.hibernate.type.BasicTypeRegistry;
+import org.hibernate.type.StandardBasicTypes;
+import org.hibernate.type.spi.TypeConfiguration;
+import org.jboss.logging.Logger;
+
+public class CustomPostgreSQLDialect extends PostgreSQLDialect {
+    private static final Logger LOGGER = Logger.getLogger(PostgreSQLDialect.class);
+
+    public CustomPostgreSQLDialect() {
+        super();
+    }
+
+    @Override
+    public void initializeFunctionRegistry(FunctionContributions functionContributions) {
+        super.initializeFunctionRegistry(functionContributions);
+
+        LOGGER.info("Initializing custom function registry");
+
+        SqmFunctionRegistry functionRegistry = functionContributions.getFunctionRegistry();
+        TypeConfiguration typeConfiguration = functionContributions.getTypeConfiguration();
+        BasicTypeRegistry basicTypeRegistry = typeConfiguration.getBasicTypeRegistry();
+        BasicType<String> stringType = basicTypeRegistry.resolve(StandardBasicTypes.STRING);
+
+        functionRegistry.namedDescriptorBuilder("unaccent").setInvariantType(stringType).setExactArgumentCount(1)
+                .setParameterTypes(new FunctionParameterType[]{FunctionParameterType.STRING}).register();
+
+    }
+}