Skip to content

H
h2database
提交 8eb12a7a authored 作者: plus33's avatar plus33
浏览文件
操作

Added Oracle compatibility of the NOT NULL syntax. 

Oracles NOT NULL syntax can have optional ENABLE VALIDATE added e.g  
  create table T (C int NOT NULL ENABLE VALIDATE)
Some SQL-generators produce such SQL and H2 can now parse it with this
change.
上级 d6532794
隐藏空白字符变更
内嵌 并排
正在显示 包含 148 行增加 和 53 行删除
h2/src/main/org/h2/command/Parser.java
浏览文件 @ 8eb12a7a
......@@ -4073,14 +4073,22 @@ public class Parser {
} else if (readIf("VISIBLE")) {
column.setVisible(true);
}
if (readIf("NOT")) {
read("NULL");
column.setNullable(false);
} else if (readIf("NULL")) {
NULL_CONSTRAINT nullConstraint = parseNotNullConstraint();
switch (nullConstraint) {
case NULL_IS_ALLOWED:
column.setNullable(true);
} else {
break;
case NULL_IS_NOT_ALLOWED:
column.setNullable(false);
break;
case NO_NULL_CONSTRAINT_FOUND:
// domains may be defined as not nullable
column.setNullable(defaultNullable & column.isNullable());
break;
default:
throw DbException.get(ErrorCode.UNKNOWN_MODE_1,
"Internal Error - unhandled case: " + nullConstraint.name());
}
if (readIf("AS")) {
if (isIdentity) {
......@@ -4113,23 +4121,21 @@ public class Parser {
column.setPrimaryKey(true);
column.setAutoIncrement(true, start, increment);
}
if (readIf("NOT")) {
read("NULL");
nullConstraint = parseNotNullConstraint();
switch (nullConstraint) {
case NULL_IS_NOT_ALLOWED:
column.setNullable(false);
} else {
readIf("NULL");
break;
default:
// do nothing
}
if (readIf("AUTO_INCREMENT") || readIf("BIGSERIAL") || readIf("SERIAL")) {
parseAutoIncrement(column);
if (readIf("NOT")) {
read("NULL");
}
parseNotNullConstraint();
} else if (readIf("IDENTITY")) {
parseAutoIncrement(column);
column.setPrimaryKey(true);
if (readIf("NOT")) {
read("NULL");
}
parseNotNullConstraint();
}
if (readIf("NULL_TO_DEFAULT")) {
column.setConvertNullToDefault(true);
......@@ -5867,25 +5873,32 @@ public class Parser {
return command;
} else if (readIf("MODIFY")) {
// MySQL compatibility
readIf("COLUMN");
readIf("COLUMN"); // optional
String columnName = readColumnIdentifier();
if ((isToken("NOT") || isToken("NULL"))) {
AlterTableAlterColumn command = new AlterTableAlterColumn(
session, schema);
command.setTableName(tableName);
command.setIfTableExists(ifTableExists);
Column column = columnIfTableExists(schema, tableName, columnName, ifTableExists);
command.setOldColumn(column);
if (readIf("NOT")) {
command.setType(CommandInterface.ALTER_TABLE_ALTER_COLUMN_NOT_NULL);
} else {
read("NULL");
AlterTableAlterColumn command = null;
NULL_CONSTRAINT nullConstraint = parseNotNullConstraint();
switch (nullConstraint) {
case NULL_IS_ALLOWED:
case NULL_IS_NOT_ALLOWED:
command = new AlterTableAlterColumn(session, schema);
command.setTableName(tableName);
command.setIfTableExists(ifTableExists);
Column column = columnIfTableExists(schema, tableName, columnName, ifTableExists);
command.setOldColumn(column);
if (nullConstraint == NULL_CONSTRAINT.NULL_IS_ALLOWED) {
command.setType(CommandInterface.ALTER_TABLE_ALTER_COLUMN_NULL);
} else {
command.setType(CommandInterface.ALTER_TABLE_ALTER_COLUMN_NOT_NULL);
}
return command;
} else {
return parseAlterTableAlterColumnType(schema, tableName, columnName, ifTableExists);
break;
case NO_NULL_CONSTRAINT_FOUND:
command = parseAlterTableAlterColumnType(schema, tableName, columnName, ifTableExists);
break;
default:
throw DbException.get(ErrorCode.UNKNOWN_MODE_1,
"Internal Error - unhandled case: " + nullConstraint.name());
}
return command;
} else if (readIf("ALTER")) {
readIf("COLUMN");
String columnName = readColumnIdentifier();
......@@ -5937,27 +5950,34 @@ public class Parser {
command.setTableName(tableName);
command.setIfTableExists(ifTableExists);
command.setOldColumn(column);
if (readIf("NULL")) {
NULL_CONSTRAINT nullConstraint = parseNotNullConstraint();
switch (nullConstraint) {
case NULL_IS_ALLOWED:
command.setType(CommandInterface.ALTER_TABLE_ALTER_COLUMN_NULL);
return command;
} else if (readIf("NOT")) {
read("NULL");
break;
case NULL_IS_NOT_ALLOWED:
command.setType(CommandInterface.ALTER_TABLE_ALTER_COLUMN_NOT_NULL);
return command;
} else if (readIf("DEFAULT")) {
Expression defaultExpression = readExpression();
command.setType(CommandInterface.ALTER_TABLE_ALTER_COLUMN_DEFAULT);
command.setDefaultExpression(defaultExpression);
return command;
} else if (readIf("INVISIBLE")) {
command.setType(CommandInterface.ALTER_TABLE_ALTER_COLUMN_VISIBILITY);
command.setVisible(false);
return command;
} else if (readIf("VISIBLE")) {
command.setType(CommandInterface.ALTER_TABLE_ALTER_COLUMN_VISIBILITY);
command.setVisible(true);
return command;
break;
case NO_NULL_CONSTRAINT_FOUND:
if (readIf("DEFAULT")) {
Expression defaultExpression = readExpression();
command.setType(CommandInterface.ALTER_TABLE_ALTER_COLUMN_DEFAULT);
command.setDefaultExpression(defaultExpression);
} else if (readIf("INVISIBLE")) {
command.setType(CommandInterface.ALTER_TABLE_ALTER_COLUMN_VISIBILITY);
command.setVisible(false);
} else if (readIf("VISIBLE")) {
command.setType(CommandInterface.ALTER_TABLE_ALTER_COLUMN_VISIBILITY);
command.setVisible(true);
}
break;
default:
throw DbException.get(ErrorCode.UNKNOWN_MODE_1,
"Internal Error - unhandled case: " + nullConstraint.name());
}
return command;
} else if (readIf("RESTART")) {
readIf("WITH");
Expression start = readExpression();
......@@ -6352,11 +6372,14 @@ public class Parser {
unique.setTableName(tableName);
command.addConstraintCommand(unique);
}
if (readIf("NOT")) {
read("NULL");
NULL_CONSTRAINT nullConstraint = parseNotNullConstraint();
switch (nullConstraint) {
case NULL_IS_NOT_ALLOWED:
column.setNullable(false);
} else {
readIf("NULL");
break;
default:
// do nothing
}
if (readIf("CHECK")) {
Expression expr = readExpression();
......@@ -6459,6 +6482,34 @@ public class Parser {
return command;
}
private enum NULL_CONSTRAINT {
NULL_IS_ALLOWED, NULL_IS_NOT_ALLOWED, NO_NULL_CONSTRAINT_FOUND
}
private NULL_CONSTRAINT parseNotNullConstraint() {
NULL_CONSTRAINT nullConstraint = NULL_CONSTRAINT.NO_NULL_CONSTRAINT_FOUND;
if ((isToken("NOT") || isToken("NULL"))) {
if (readIf("NOT")) {
read("NULL");
nullConstraint = NULL_CONSTRAINT.NULL_IS_NOT_ALLOWED;
} else {
read("NULL");
nullConstraint = NULL_CONSTRAINT.NULL_IS_ALLOWED;
}
if (readIf("ENABLE")) {
readIf("VALIDATE"); // Leave constraint 'as is'
if (readIf("NOVALIDATE")) { // Turn off constraint, thus allow NULLs
nullConstraint = NULL_CONSTRAINT.NULL_IS_ALLOWED;
}
}
if (readIf("DISABLE")) { // Turn off constraint, thus allow NULLs
nullConstraint = NULL_CONSTRAINT.NULL_IS_ALLOWED;
readIf("VALIDATE"); // ignore validate
readIf("NOVALIDATE"); // ignore novalidate
}
}
return nullConstraint;
}
private CreateSynonym parseCreateSynonym(boolean orReplace) {
boolean ifNotExists = readIfNotExists();
......
h2/src/test/org/h2/test/db/TestAlter.java
浏览文件 @ 8eb12a7a
......@@ -304,7 +304,28 @@ public class TestAlter extends TestBase {
// This failed in v1.4.196
stat.execute("create table T (C int not null)");
stat.execute("alter table T modify C null"); // Silently corrupted column C
stat.execute("insert into T values(null)"); // <- ERROR: NULL not allowed
stat.execute("insert into T values(null)"); // <- Fixed in v1.4.196 - NULL is allowed
stat.execute("drop table T");
// Some other variation (oracle syntax)
stat.execute("create table T (C int not null)");
stat.execute("insert into T values(1)");
stat.execute("alter table T modify C not null");
stat.execute("insert into T values(1)");
stat.execute("alter table T modify C not null enable");
stat.execute("insert into T values(1)");
stat.execute("alter table T modify C not null enable validate");
stat.execute("insert into T values(1)");
stat.execute("drop table T");
// can set NULL
stat.execute("create table T (C int null)");
stat.execute("insert into T values(null)");
stat.execute("alter table T modify C null enable");
stat.execute("alter table T modify C null enable validate");
stat.execute("insert into T values(null)");
stat.execute("alter table T modify C not null disable"); // can set NULL even with 'not null syntax' (oracle)
stat.execute("insert into T values(null)");
stat.execute("alter table T modify C not null enable novalidate"); // can set NULL even with 'not null syntax' (oracle)
stat.execute("insert into T values(null)");
stat.execute("drop table T");
}
}
h2/src/test/org/h2/test/db/TestCompatibilityOracle.java
浏览文件 @ 8eb12a7a
......@@ -34,6 +34,7 @@ public class TestCompatibilityOracle extends TestBase {
@Override
public void test() throws Exception {
testNotNullSyntax();
testTreatEmptyStringsAsNull();
testDecimalScale();
testPoundSymbolInColumnName();
......@@ -41,6 +42,28 @@ public class TestCompatibilityOracle extends TestBase {
testForbidEmptyInClause();
}
private void testNotNullSyntax() throws SQLException {
deleteDb("oracle");
Connection conn = getConnection("oracle;MODE=Oracle");
Statement stat = conn.createStatement();
// Some other variation (oracle syntax)
stat.execute("create table T (C int not null enable)");
stat.execute("insert into T values(1)");
stat.execute("drop table T");
stat.execute("create table T (C int not null enable validate)");
stat.execute("insert into T values(1)");
stat.execute("drop table T");
// can set NULL
stat.execute("create table T (C int not null disable)"); // can set NULL even with 'not null syntax' (oracle)
stat.execute("insert into T values(null)");
stat.execute("drop table T");
stat.execute("create table T (C int not null enable novalidate)"); // can set NULL even with 'not null syntax' (oracle)
stat.execute("insert into T values(null)");
stat.execute("drop table T");
conn.close();
}
private void testTreatEmptyStringsAsNull() throws SQLException {
deleteDb("oracle");
Connection conn = getConnection("oracle;MODE=Oracle");
......
Markdown 格式
0% 或
您添加了 0 人 到此讨论。请谨慎行事。
请先完成此评论的编辑！
请 注册 或者 后发表评论