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Code Issues Releases Wiki Activity

improved sql parser for postgresql

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This commit is contained in:
wenshao
2014-11-16 15:35:47 +08:00
parent 6983fa6d1f
commit 8e6dbe121b
29 changed files with 655 additions and 74 deletions
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src/main/java/com/alibaba/druid/sql/PagerUtils.java
+21 -10
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@@ -142,11 +142,13 @@ public class PagerUtils {
SQLBinaryOpExpr gt = new SQLBinaryOpExpr(new SQLIdentifierExpr("ROWNUM"), //
SQLBinaryOperator.GreaterThan, //
new SQLNumberExpr(offset));
new SQLNumberExpr(offset), //
JdbcConstants.DB2);
SQLBinaryOpExpr lteq = new SQLBinaryOpExpr(new SQLIdentifierExpr("ROWNUM"), //
SQLBinaryOperator.LessThanOrEqual, //
new SQLNumberExpr(count + offset));
SQLBinaryOpExpr pageCondition = new SQLBinaryOpExpr(gt, SQLBinaryOperator.BooleanAnd, lteq);
new SQLNumberExpr(count + offset), //
JdbcConstants.DB2);
SQLBinaryOpExpr pageCondition = new SQLBinaryOpExpr(gt, SQLBinaryOperator.BooleanAnd, lteq, JdbcConstants.DB2);
if (query instanceof SQLSelectQueryBlock) {
DB2SelectQueryBlock queryBlock = (DB2SelectQueryBlock) query;
@@ -199,11 +201,14 @@ public class PagerUtils {
SQLBinaryOpExpr gt = new SQLBinaryOpExpr(new SQLIdentifierExpr("ROWNUM"), //
SQLBinaryOperator.GreaterThan, //
new SQLNumberExpr(offset));
new SQLNumberExpr(offset), //
JdbcConstants.SQL_SERVER
);
SQLBinaryOpExpr lteq = new SQLBinaryOpExpr(new SQLIdentifierExpr("ROWNUM"), //
SQLBinaryOperator.LessThanOrEqual, //
new SQLNumberExpr(count + offset));
SQLBinaryOpExpr pageCondition = new SQLBinaryOpExpr(gt, SQLBinaryOperator.BooleanAnd, lteq);
new SQLNumberExpr(count + offset), //
JdbcConstants.SQL_SERVER);
SQLBinaryOpExpr pageCondition = new SQLBinaryOpExpr(gt, SQLBinaryOperator.BooleanAnd, lteq, JdbcConstants.SQL_SERVER);
if (query instanceof SQLSelectQueryBlock) {
SQLServerSelectQueryBlock queryBlock = (SQLServerSelectQueryBlock) query;
@@ -262,13 +267,17 @@ public class PagerUtils {
if (queryBlock.getGroupBy() == null && select.getOrderBy() == null && offset <= 0) {
SQLExpr condition = new SQLBinaryOpExpr(new SQLIdentifierExpr("ROWNUM"), //
SQLBinaryOperator.LessThanOrEqual, //
new SQLNumberExpr(count));
new SQLNumberExpr(count), //
JdbcConstants.ORACLE
);
if (queryBlock.getWhere() == null) {
queryBlock.setWhere(condition);
} else {
queryBlock.setWhere(new SQLBinaryOpExpr(queryBlock.getWhere(), //
SQLBinaryOperator.BooleanAnd, //
condition));
condition, //
JdbcConstants.ORACLE
));
}
return SQLUtils.toSQLString(select, dbType);
@@ -282,7 +291,8 @@ public class PagerUtils {
countQueryBlock.setFrom(new SQLSubqueryTableSource(select, "XX"));
countQueryBlock.setWhere(new SQLBinaryOpExpr(new SQLIdentifierExpr("ROWNUM"), //
SQLBinaryOperator.LessThanOrEqual, //
new SQLNumberExpr(count + offset)));
new SQLNumberExpr(count + offset), //
JdbcConstants.ORACLE));
if (offset <= 0) {
return SQLUtils.toSQLString(countQueryBlock, dbType);
}
@@ -292,7 +302,8 @@ public class PagerUtils {
offsetQueryBlock.setFrom(new SQLSubqueryTableSource(new SQLSelect(countQueryBlock), "XXX"));
offsetQueryBlock.setWhere(new SQLBinaryOpExpr(new SQLIdentifierExpr("RN"), //
SQLBinaryOperator.GreaterThan, //
new SQLNumberExpr(offset)));
new SQLNumberExpr(offset), //
JdbcConstants.ORACLE));
return SQLUtils.toSQLString(offsetQueryBlock, dbType);
}