db2 sql parser support sequence expr. fixed issue #1323

2023-03-04 19:17:16 +00:00 · 2016-07-09 04:10:26 +08:00
parent 2ccd7cf22e
commit 552e090d11
7 changed files with 411 additions and 1 deletions
@@ -15,12 +15,18 @@
 */
 package com.alibaba.druid.sql.dialect.db2.parser;

+import com.alibaba.druid.sql.ast.SQLExpr;
+import com.alibaba.druid.sql.ast.SQLName;
+import com.alibaba.druid.sql.ast.expr.SQLIdentifierExpr;
+import com.alibaba.druid.sql.ast.expr.SQLSequenceExpr;
 import com.alibaba.druid.sql.parser.Lexer;
 import com.alibaba.druid.sql.parser.SQLExprParser;
+import com.alibaba.druid.sql.parser.Token;

 public class DB2ExprParser extends SQLExprParser {

-    public final static String[] AGGREGATE_FUNCTIONS = { "AVG", "COUNT", "MAX", "MIN", "STDDEV", "SUM", "ROW_NUMBER", "ROWNUMBER" };
+    public final static String[] AGGREGATE_FUNCTIONS = { "AVG", "COUNT", "MAX", "MIN", "STDDEV", "SUM", "ROW_NUMBER",
+                                                         "ROWNUMBER" };

    public DB2ExprParser(String sql){
        this(new DB2Lexer(sql));
@@ -32,4 +38,55 @@ public class DB2ExprParser extends SQLExprParser {
        this.aggregateFunctions = AGGREGATE_FUNCTIONS;
    }

+    public SQLExpr primaryRest(SQLExpr expr) {
+        if (identifierEquals("VALUE")) {
+            if (expr instanceof SQLIdentifierExpr) {
+                SQLIdentifierExpr identExpr = (SQLIdentifierExpr) expr;
+                String ident = identExpr.getName();
+                if (ident.equalsIgnoreCase("NEXT")) {
+                    lexer.nextToken();
+                    accept(Token.FOR);
+                    SQLName seqName = this.name();
+                    SQLSequenceExpr seqExpr = new SQLSequenceExpr(seqName, SQLSequenceExpr.Function.NextVal);
+                    return seqExpr;
+                } else if (ident.equalsIgnoreCase("PREVIOUS")) {
+                    lexer.nextToken();
+                    accept(Token.FOR);
+                    SQLName seqName = this.name();
+                    SQLSequenceExpr seqExpr = new SQLSequenceExpr(seqName, SQLSequenceExpr.Function.PrevVal);
+                    return seqExpr;
+                }
+            }
+        }
+
+        return super.primaryRest(expr);
+    }
+
+    protected SQLExpr dotRest(SQLExpr expr) {
+        if (identifierEquals("NEXTVAL")) {
+            if (expr instanceof SQLIdentifierExpr) {
+                SQLIdentifierExpr identExpr = (SQLIdentifierExpr) expr;
+                SQLSequenceExpr seqExpr = new SQLSequenceExpr(identExpr, SQLSequenceExpr.Function.NextVal);
+                lexer.nextToken();
+                return seqExpr;
+            }
+        } else if (identifierEquals("PREVVAL")) {
+            if (expr instanceof SQLIdentifierExpr) {
+                SQLIdentifierExpr identExpr = (SQLIdentifierExpr) expr;
+                SQLSequenceExpr seqExpr = new SQLSequenceExpr(identExpr, SQLSequenceExpr.Function.PrevVal);
+                lexer.nextToken();
+                return seqExpr;
+            }
+        } else if (identifierEquals("CURRVAL")) {
+            if (expr instanceof SQLIdentifierExpr) {
+                SQLIdentifierExpr identExpr = (SQLIdentifierExpr) expr;
+                SQLSequenceExpr seqExpr = new SQLSequenceExpr(identExpr, SQLSequenceExpr.Function.CurrVal);
+                lexer.nextToken();
+                return seqExpr;
+            }
+        }
+
+        return super.dotRest(expr);
+    }
+
 }
@@ -2010,4 +2010,12 @@ public class SQLExprParser extends SQLParser {

        return values;
    }
+    
+    protected static boolean isIdent(SQLExpr expr, String name) {
+        if (expr instanceof SQLIdentifierExpr) {
+            SQLIdentifierExpr identExpr = (SQLIdentifierExpr) expr;
+            return identExpr.getName().equalsIgnoreCase(name);
+        }
+        return false;
+    }
 }
@@ -0,0 +1,69 @@
+/*
+ * Copyright 1999-2101 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.alibaba.druid.bvt.sql.db2;
+
+import java.util.List;
+
+import org.junit.Assert;
+
+import com.alibaba.druid.sql.DB2Test;
+import com.alibaba.druid.sql.SQLUtils;
+import com.alibaba.druid.sql.ast.SQLStatement;
+import com.alibaba.druid.sql.dialect.db2.parser.DB2StatementParser;
+import com.alibaba.druid.sql.dialect.db2.visitor.DB2SchemaStatVisitor;
+import com.alibaba.druid.stat.TableStat;
+import com.alibaba.druid.stat.TableStat.Column;
+import com.alibaba.druid.util.JdbcConstants;
+
+public class DB2SelectTest_17 extends DB2Test {
+
+    public void test_0() throws Exception {
+        String sql = "SELECT (NEXT VALUE FOR EMPNO) FROM SYSIBM.SYSDUMMY1";
+
+        DB2StatementParser parser = new DB2StatementParser(sql);
+        List<SQLStatement> statementList = parser.parseStatementList();
+        SQLStatement stmt = statementList.get(0);
+        print(statementList);
+
+        Assert.assertEquals(1, statementList.size());
+
+        DB2SchemaStatVisitor visitor = new DB2SchemaStatVisitor();
+        stmt.accept(visitor);
+
+//        System.out.println("Tables : " + visitor.getTables());
+//        System.out.println("fields : " + visitor.getColumns());
+//        System.out.println("coditions : " + visitor.getConditions());
+//        System.out.println("orderBy : " + visitor.getOrderByColumns());
+
+        Assert.assertEquals(1, visitor.getTables().size());
+        Assert.assertEquals(0, visitor.getColumns().size());
+        Assert.assertEquals(0, visitor.getConditions().size());
+
+        Assert.assertTrue(visitor.getTables().containsKey(new TableStat.Name("SYSIBM.SYSDUMMY1")));
+
+//         Assert.assertTrue(visitor.getColumns().contains(new Column("DSN8B10.EMP", "WORKDEPT")));
+        // Assert.assertTrue(visitor.getColumns().contains(new Column("mytable", "first_name")));
+        // Assert.assertTrue(visitor.getColumns().contains(new Column("mytable", "full_name")));
+
+        Assert.assertEquals("SELECT EMPNO.NEXTVAL"
+                + "\nFROM SYSIBM.SYSDUMMY1", //
+                            SQLUtils.toSQLString(stmt, JdbcConstants.DB2));
+        
+        Assert.assertEquals("select EMPNO.nextval"
+                + "\nfrom SYSIBM.SYSDUMMY1", //
+                            SQLUtils.toSQLString(stmt, JdbcConstants.DB2, SQLUtils.DEFAULT_LCASE_FORMAT_OPTION));
+    }
+}
@@ -0,0 +1,69 @@
+/*
+ * Copyright 1999-2101 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.alibaba.druid.bvt.sql.db2;
+
+import java.util.List;
+
+import org.junit.Assert;
+
+import com.alibaba.druid.sql.DB2Test;
+import com.alibaba.druid.sql.SQLUtils;
+import com.alibaba.druid.sql.ast.SQLStatement;
+import com.alibaba.druid.sql.dialect.db2.parser.DB2StatementParser;
+import com.alibaba.druid.sql.dialect.db2.visitor.DB2SchemaStatVisitor;
+import com.alibaba.druid.stat.TableStat;
+import com.alibaba.druid.stat.TableStat.Column;
+import com.alibaba.druid.util.JdbcConstants;
+
+public class DB2SelectTest_18 extends DB2Test {
+
+    public void test_0() throws Exception {
+        String sql = "SELECT (PREVIOUS VALUE FOR EMPNO) FROM SYSIBM.SYSDUMMY1";
+
+        DB2StatementParser parser = new DB2StatementParser(sql);
+        List<SQLStatement> statementList = parser.parseStatementList();
+        SQLStatement stmt = statementList.get(0);
+        print(statementList);
+
+        Assert.assertEquals(1, statementList.size());
+
+        DB2SchemaStatVisitor visitor = new DB2SchemaStatVisitor();
+        stmt.accept(visitor);
+
+//        System.out.println("Tables : " + visitor.getTables());
+//        System.out.println("fields : " + visitor.getColumns());
+//        System.out.println("coditions : " + visitor.getConditions());
+//        System.out.println("orderBy : " + visitor.getOrderByColumns());
+
+        Assert.assertEquals(1, visitor.getTables().size());
+        Assert.assertEquals(0, visitor.getColumns().size());
+        Assert.assertEquals(0, visitor.getConditions().size());
+
+        Assert.assertTrue(visitor.getTables().containsKey(new TableStat.Name("SYSIBM.SYSDUMMY1")));
+
+//         Assert.assertTrue(visitor.getColumns().contains(new Column("DSN8B10.EMP", "WORKDEPT")));
+        // Assert.assertTrue(visitor.getColumns().contains(new Column("mytable", "first_name")));
+        // Assert.assertTrue(visitor.getColumns().contains(new Column("mytable", "full_name")));
+
+        Assert.assertEquals("SELECT EMPNO.PREVVAL"
+                + "\nFROM SYSIBM.SYSDUMMY1", //
+                            SQLUtils.toSQLString(stmt, JdbcConstants.DB2));
+        
+        Assert.assertEquals("select EMPNO.prevval"
+                + "\nfrom SYSIBM.SYSDUMMY1", //
+                            SQLUtils.toSQLString(stmt, JdbcConstants.DB2, SQLUtils.DEFAULT_LCASE_FORMAT_OPTION));
+    }
+}
@@ -0,0 +1,69 @@
+/*
+ * Copyright 1999-2101 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.alibaba.druid.bvt.sql.db2;
+
+import java.util.List;
+
+import org.junit.Assert;
+
+import com.alibaba.druid.sql.DB2Test;
+import com.alibaba.druid.sql.SQLUtils;
+import com.alibaba.druid.sql.ast.SQLStatement;
+import com.alibaba.druid.sql.dialect.db2.parser.DB2StatementParser;
+import com.alibaba.druid.sql.dialect.db2.visitor.DB2SchemaStatVisitor;
+import com.alibaba.druid.stat.TableStat;
+import com.alibaba.druid.stat.TableStat.Column;
+import com.alibaba.druid.util.JdbcConstants;
+
+public class DB2SelectTest_19 extends DB2Test {
+
+    public void test_0() throws Exception {
+        String sql = "SELECT EMPNO.CURRVAL FROM SYSIBM.SYSDUMMY1";
+
+        DB2StatementParser parser = new DB2StatementParser(sql);
+        List<SQLStatement> statementList = parser.parseStatementList();
+        SQLStatement stmt = statementList.get(0);
+        print(statementList);
+
+        Assert.assertEquals(1, statementList.size());
+
+        DB2SchemaStatVisitor visitor = new DB2SchemaStatVisitor();
+        stmt.accept(visitor);
+
+//        System.out.println("Tables : " + visitor.getTables());
+//        System.out.println("fields : " + visitor.getColumns());
+//        System.out.println("coditions : " + visitor.getConditions());
+//        System.out.println("orderBy : " + visitor.getOrderByColumns());
+
+        Assert.assertEquals(1, visitor.getTables().size());
+        Assert.assertEquals(0, visitor.getColumns().size());
+        Assert.assertEquals(0, visitor.getConditions().size());
+
+        Assert.assertTrue(visitor.getTables().containsKey(new TableStat.Name("SYSIBM.SYSDUMMY1")));
+
+//         Assert.assertTrue(visitor.getColumns().contains(new Column("DSN8B10.EMP", "WORKDEPT")));
+        // Assert.assertTrue(visitor.getColumns().contains(new Column("mytable", "first_name")));
+        // Assert.assertTrue(visitor.getColumns().contains(new Column("mytable", "full_name")));
+
+        Assert.assertEquals("SELECT EMPNO.CURRVAL"
+                + "\nFROM SYSIBM.SYSDUMMY1", //
+                            SQLUtils.toSQLString(stmt, JdbcConstants.DB2));
+        
+        Assert.assertEquals("select EMPNO.currval"
+                + "\nfrom SYSIBM.SYSDUMMY1", //
+                            SQLUtils.toSQLString(stmt, JdbcConstants.DB2, SQLUtils.DEFAULT_LCASE_FORMAT_OPTION));
+    }
+}
@@ -0,0 +1,69 @@
+/*
+ * Copyright 1999-2101 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.alibaba.druid.bvt.sql.db2;
+
+import java.util.List;
+
+import org.junit.Assert;
+
+import com.alibaba.druid.sql.DB2Test;
+import com.alibaba.druid.sql.SQLUtils;
+import com.alibaba.druid.sql.ast.SQLStatement;
+import com.alibaba.druid.sql.dialect.db2.parser.DB2StatementParser;
+import com.alibaba.druid.sql.dialect.db2.visitor.DB2SchemaStatVisitor;
+import com.alibaba.druid.stat.TableStat;
+import com.alibaba.druid.stat.TableStat.Column;
+import com.alibaba.druid.util.JdbcConstants;
+
+public class DB2SelectTest_20 extends DB2Test {
+
+    public void test_0() throws Exception {
+        String sql = "SELECT EMPNO.PREVVAL FROM SYSIBM.SYSDUMMY1";
+
+        DB2StatementParser parser = new DB2StatementParser(sql);
+        List<SQLStatement> statementList = parser.parseStatementList();
+        SQLStatement stmt = statementList.get(0);
+        print(statementList);
+
+        Assert.assertEquals(1, statementList.size());
+
+        DB2SchemaStatVisitor visitor = new DB2SchemaStatVisitor();
+        stmt.accept(visitor);
+
+//        System.out.println("Tables : " + visitor.getTables());
+//        System.out.println("fields : " + visitor.getColumns());
+//        System.out.println("coditions : " + visitor.getConditions());
+//        System.out.println("orderBy : " + visitor.getOrderByColumns());
+
+        Assert.assertEquals(1, visitor.getTables().size());
+        Assert.assertEquals(0, visitor.getColumns().size());
+        Assert.assertEquals(0, visitor.getConditions().size());
+
+        Assert.assertTrue(visitor.getTables().containsKey(new TableStat.Name("SYSIBM.SYSDUMMY1")));
+
+//         Assert.assertTrue(visitor.getColumns().contains(new Column("DSN8B10.EMP", "WORKDEPT")));
+        // Assert.assertTrue(visitor.getColumns().contains(new Column("mytable", "first_name")));
+        // Assert.assertTrue(visitor.getColumns().contains(new Column("mytable", "full_name")));
+
+        Assert.assertEquals("SELECT EMPNO.PREVVAL"
+                + "\nFROM SYSIBM.SYSDUMMY1", //
+                            SQLUtils.toSQLString(stmt, JdbcConstants.DB2));
+        
+        Assert.assertEquals("select EMPNO.prevval"
+                + "\nfrom SYSIBM.SYSDUMMY1", //
+                            SQLUtils.toSQLString(stmt, JdbcConstants.DB2, SQLUtils.DEFAULT_LCASE_FORMAT_OPTION));
+    }
+}
@@ -0,0 +1,69 @@
+/*
+ * Copyright 1999-2101 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.alibaba.druid.bvt.sql.db2;
+
+import java.util.List;
+
+import org.junit.Assert;
+
+import com.alibaba.druid.sql.DB2Test;
+import com.alibaba.druid.sql.SQLUtils;
+import com.alibaba.druid.sql.ast.SQLStatement;
+import com.alibaba.druid.sql.dialect.db2.parser.DB2StatementParser;
+import com.alibaba.druid.sql.dialect.db2.visitor.DB2SchemaStatVisitor;
+import com.alibaba.druid.stat.TableStat;
+import com.alibaba.druid.stat.TableStat.Column;
+import com.alibaba.druid.util.JdbcConstants;
+
+public class DB2SelectTest_21 extends DB2Test {
+
+    public void test_0() throws Exception {
+        String sql = "SELECT EMPNO.nextval FROM SYSIBM.SYSDUMMY1";
+
+        DB2StatementParser parser = new DB2StatementParser(sql);
+        List<SQLStatement> statementList = parser.parseStatementList();
+        SQLStatement stmt = statementList.get(0);
+        print(statementList);
+
+        Assert.assertEquals(1, statementList.size());
+
+        DB2SchemaStatVisitor visitor = new DB2SchemaStatVisitor();
+        stmt.accept(visitor);
+
+//        System.out.println("Tables : " + visitor.getTables());
+//        System.out.println("fields : " + visitor.getColumns());
+//        System.out.println("coditions : " + visitor.getConditions());
+//        System.out.println("orderBy : " + visitor.getOrderByColumns());
+
+        Assert.assertEquals(1, visitor.getTables().size());
+        Assert.assertEquals(0, visitor.getColumns().size());
+        Assert.assertEquals(0, visitor.getConditions().size());
+
+        Assert.assertTrue(visitor.getTables().containsKey(new TableStat.Name("SYSIBM.SYSDUMMY1")));
+
+//         Assert.assertTrue(visitor.getColumns().contains(new Column("DSN8B10.EMP", "WORKDEPT")));
+        // Assert.assertTrue(visitor.getColumns().contains(new Column("mytable", "first_name")));
+        // Assert.assertTrue(visitor.getColumns().contains(new Column("mytable", "full_name")));
+
+        Assert.assertEquals("SELECT EMPNO.NEXTVAL"
+                + "\nFROM SYSIBM.SYSDUMMY1", //
+                            SQLUtils.toSQLString(stmt, JdbcConstants.DB2));
+        
+        Assert.assertEquals("select EMPNO.nextval"
+                + "\nfrom SYSIBM.SYSDUMMY1", //
+                            SQLUtils.toSQLString(stmt, JdbcConstants.DB2, SQLUtils.DEFAULT_LCASE_FORMAT_OPTION));
+    }
+}