Package org.olap4j.mdx.parser
Interface MdxParser
- All Known Implementing Classes:
DefaultMdxParserImpl
public interface MdxParser
Parser for the MDX query language.
A parser is reusable but not reentrant: you can call parseSelect(java.lang.String)
and parseExpression(java.lang.String)
several times, but not at the same time
from different threads.
- Since:
- Aug 22, 2006
- Author:
- jhyde
- See Also:
-
Method Summary
Modifier and TypeMethodDescriptionparseExpression
(String mdx) Parses an MDX expression and returns a parse tree.parseSelect
(String mdx) Parses an MDX Select statement and returns theSelectNode
at the root of the parse tree.
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Method Details
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parseSelect
Parses an MDX Select statement and returns theSelectNode
at the root of the parse tree.In order to be parsed successfully, the expression must be syntactically correct but does not need to be valid. (Syntactic correctness and validity are described further in the description of
parseExpression(String)
.)- Parameters:
mdx
- MDX query string- Returns:
- Parse tree
-
parseExpression
Parses an MDX expression and returns a parse tree.An expression is a combination of operators and operands, which can occur in many places inside an MDX query, such as the definition of a calculated member or an axis.
In order to be parsed successfully, the expression must be syntactically correct but does not need to be valid. For example,
is syntactically incorrect, because there are more open parentheses "(" than close parentheses ")", and the parser will give an error. Conversely,(1 + (2 + 3)
is syntactically correct, and the parser will successfully create a parse tree, even if(1 + [Measures].[Bad Measure])
[Measures].[Bad Measure]
does not exist.- Parameters:
mdx
- MDX expression- Returns:
- Parse tree
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