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  • Isomorphic
    replied
    To get just an "=" you would need to use a case-sensitive operator (such as "equals" instead of "iEquals" or "contains" instead of "iContains"). "LIKE BINARY" is required to do a case sensitive comparison.

    However, done how we do it, indices are used and there should not be a table scan, because the LIKE BINARY comparison is done only after the index has been used to find the case-insensitive match.

    Leave a comment:


  • aderosso
    replied
    We're getting what your describing, both "=" and "LIKE BINARY". How do we get just the = without LIKE BINARY?

    Leave a comment:


  • Isomorphic
    replied
    This is surprising. It worked for us locally as expected, i.e. for the case sensitive request (textMatchStyle=exactCase) we've got the following SQL condition generated (schematically):
    Code:
    table.column = 'value..' AND table.column LIKE BINARY 'value...'
    Could you please share more details, ideally standalone use case (modified sample for example) showcasing the problem?

    Leave a comment:


  • aderosso
    replied
    We've upgraded our application to 13.0. We also tried using the:

    Code:
    sql.mysql.optimizeCaseSensitiveCriteria: true
    We're still getting the "LIKE BINARY" instead of "=".

    Is there something else we can do in the ds.xml to control how the clause is generated?

    Leave a comment:


  • Isomorphic
    replied
    Yes, in 13.0 this is enabled by default.

    Leave a comment:


  • aderosso
    replied
    Perfect. we're actually in the midst of upgrading right now to 13.0 so we'll check that out.

    Is this enabled by default in 13.0?

    Leave a comment:


  • Isomorphic
    replied
    Since Smartclient 13.0 we are using complex comparison for Mysql case sensitive equality check to ensure efficiency and accuracy:
    - the regular "=" comparison to enable index usage and
    - LIKE BINARY comparison to ensure case sensitivity

    In Smartclient 12.1 this was a hidden setting disabled by default and not officially supported, but it is now. In the nightly builds since March 18 (tomorrow) this setting will be enabled by default, but you don't have to wait for it and configure it manually in your server.properties:
    Code:
    sql.mysql.optimizeCaseSensitiveCriteria: true

    Leave a comment:


  • aderosso
    started a topic SQL DataSource Equals Instead of Like

    SQL DataSource Equals Instead of Like

    SmartGWT Enterprise version 12.1-p20220107

    We have a SQL data source, using MySQL. There is a table that uses a varchar as a primary key. We're able to execute DSRequests from a ListGrid just fine, but we're having performance issues with the query. Here's the criteria being sent:

    Code:
     data:{
            operator:"and",
            criteria:[
                {
                    fieldName:"price_book_id",
                    operator:"equals",
                    value:"211557947"
                },
                {
                    fieldName:"hdw_type_id",
                    operator:"equals",
                    value:"LO"
                }
            ]
        },
    And the where clause generated is:

    Code:
    WHERE
        ((hdw_line.price_book_id = 211557947
            AND hdw_line.price_book_id IS NOT NULL)
            AND (hdw_std.hdw_type_id LIKE BINARY 'LO'
            AND hdw_std.hdw_type_id IS NOT NULL))
    The query using LIKE BINARY works correctly, but is much slower than using "=". Is there a way to get the query to use the equals operator instead of LIKE?
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