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Code Issues Releases Wiki Activity

refactor sql parser.

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This commit is contained in:
wenshao
2017-09-18 19:57:42 +08:00
parent 8343ca08c4
commit 0062ea4919
15 changed files with 431 additions and 8 deletions
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src/main/java/com/alibaba/druid/sql/SQLTransformUtils.java
+53 -1
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@@ -19,8 +19,10 @@ import com.alibaba.druid.sql.ast.SQLDataType;
import com.alibaba.druid.sql.ast.SQLDataTypeImpl;
import com.alibaba.druid.sql.ast.SQLExpr;
import com.alibaba.druid.sql.ast.expr.*;
import com.alibaba.druid.sql.ast.statement.SQLCharacterDataType;
import com.alibaba.druid.sql.ast.statement.*;
import com.alibaba.druid.sql.dialect.oracle.ast.stmt.*;
import com.alibaba.druid.util.FnvHash;
import oracle.jdbc.rowset.OracleJoinable;
import java.util.List;
@@ -629,8 +631,58 @@ public class SQLTransformUtils {
long nameHashCode64 = x.methodNameHashCode64();
if (nameHashCode64 == FnvHash.Constants.SYS_GUID) {
SQLMethodInvokeExpr uuid_generate_v4 = new SQLMethodInvokeExpr("uuid_generate_v4");
uuid_generate_v4.setParent(x.getParent());
return uuid_generate_v4;
}
return x;
}
public static SQLTableSource transformOracleToPostgresql(SQLTableSource x) {
if (x instanceof OracleSelectTableReference) {
OracleSelectTableReference xx = (OracleSelectTableReference) x;
SQLExprTableSource y = new SQLExprTableSource();
xx.cloneTo(y);
y.setParent(x.getParent());
return y;
}
if (x instanceof OracleSelectJoin) {
OracleSelectJoin xx = (OracleSelectJoin) x;
SQLJoinTableSource y = new SQLJoinTableSource();
xx.cloneTo(y);
y.setLeft(transformOracleToPostgresql(y.getLeft()));
y.setRight(transformOracleToPostgresql(y.getRight()));
y.setParent(x.getParent());
return y;
}
if (x instanceof OracleSelectSubqueryTableSource) {
OracleSelectSubqueryTableSource xx = (OracleSelectSubqueryTableSource) x;
SQLSubqueryTableSource y = new SQLSubqueryTableSource();
xx.cloneTo(y);
y.setParent(x.getParent());
return y;
}
return x;
}
public static SQLSelectQueryBlock transformOracleToPostgresql(SQLSelectQueryBlock x) {
if (x instanceof OracleSelectQueryBlock) {
OracleSelectQueryBlock xx = (OracleSelectQueryBlock) x;
SQLSelectQueryBlock y = new SQLSelectQueryBlock();
xx.cloneTo(y);
y.setFrom(transformOracleToPostgresql(y.getFrom()));
y.setParent(x.getParent());
return y;
}
return x;
}
}