Merge pull request #807 from Altinity/806-ddl-execution-error-alter-t…

…able-employees-drop-constraint-employees_ibfk_2 Added support for DROP CONSTRAINT
Altinity · Sep 14, 2024 · b60db22 · b60db22
2 parents 6497ada + 93ab2fe
commit b60db22
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Showing 2 changed files with 13 additions and 2 deletions.
diff --git a/...tweight/src/main/java/com/altinity/clickhouse/debezium/embedded/ddl/parser/Constants.java b/...tweight/src/main/java/com/altinity/clickhouse/debezium/embedded/ddl/parser/Constants.java
@@ -49,7 +49,7 @@ public class Constants {
 
     public static final String DROP_COLUMN = "DROP COLUMN %s";
 
-
+    public static final String DROP_CONSTRAINT = "DROP CONSTRAINT %s";
     public static final String NEW_REPLACING_MERGE_TREE_VERSION = "23.2";
 
 

diff --git a/...java/com/altinity/clickhouse/debezium/embedded/ddl/parser/MySqlDDLParserListenerImpl.java b/...java/com/altinity/clickhouse/debezium/embedded/ddl/parser/MySqlDDLParserListenerImpl.java
@@ -542,7 +542,18 @@ public void enterAlterTable(MySqlParser.AlterTableContext alterTableContext) {
             if (tree instanceof AlterByAddColumnContext) {
                 parseAlterTable(tree);
 
-            } else if (tree instanceof MySqlParser.AlterByModifyColumnContext) {
+            }
+            else if (tree instanceof MySqlParser.AlterByDropConstraintCheckContext) {
+                // Drop Constraint.
+                this.query.append(" ");
+                for (ParseTree dropConstraintTree : ((MySqlParser.AlterByDropConstraintCheckContext) (tree)).children) {
+                    if (dropConstraintTree instanceof MySqlParser.UidContext) {
+                        System.out.println("Drop Constraint");
+                        this.query.append(String.format(Constants.DROP_CONSTRAINT, dropConstraintTree.getText()));
+                    }
+                }
+            }
+            else if (tree instanceof MySqlParser.AlterByModifyColumnContext) {
                 parseAlterTable(tree);
             } else if (tree instanceof MySqlParser.AlterByDropColumnContext) {
                 // Drop Column.