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Code Issues Releases Wiki Activity

improved odps sql parser, support more 'change column' syntax.

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This commit is contained in:
wenshao
2017-04-05 20:14:10 +08:00
parent 99337c1ffb
commit 23d2bf5fe7
6 changed files with 167 additions and 8 deletions
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src/main/java/com/alibaba/druid/sql/parser/SQLStatementParser.java
+28 -8
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@@ -885,18 +885,38 @@ public class SQLStatementParser extends SQLParser {
lexer.nextToken();
accept(Token.COLUMN);
SQLName columnName = this.exprParser.name();
accept(Token.COMMENT);
SQLExpr comment = this.exprParser.primary();
SQLColumnDefinition columnDefinition = new SQLColumnDefinition();
columnDefinition.setName(columnName);
columnDefinition.setComment(comment);
if (identifierEquals("RENAME")) {
lexer.nextToken();
accept(Token.TO);
SQLName toName = this.exprParser.name();
SQLAlterTableRenameColumn renameColumn = new SQLAlterTableRenameColumn();
SQLAlterTableAlterColumn changeColumn = new SQLAlterTableAlterColumn();
renameColumn.setColumn(columnName);
renameColumn.setTo(toName);
changeColumn.setColumn(columnDefinition);
stmt.addItem(renameColumn);
} else if (lexer.token() == Token.COMMENT) {
lexer.nextToken();
SQLExpr comment = this.exprParser.primary();
stmt.addItem(changeColumn);
SQLColumnDefinition columnDefinition = new SQLColumnDefinition();
columnDefinition.setName(columnName);
columnDefinition.setComment(comment);
SQLAlterTableAlterColumn changeColumn = new SQLAlterTableAlterColumn();
changeColumn.setColumn(columnDefinition);
stmt.addItem(changeColumn);
} else {
SQLColumnDefinition column = this.exprParser.parseColumn();
SQLAlterTableAlterColumn alterColumn = new SQLAlterTableAlterColumn();
alterColumn.setColumn(column);
alterColumn.setOriginColumn(columnName);
stmt.addItem(alterColumn);
}
} else if (lexer.token() == Token.WITH) {
lexer.nextToken();
acceptIdentifier("NOCHECK");