2023-03-05
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2023-03-05
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IslandSQL Episode 4: Expressions

Introduction In the last episode, we extended the IslandSQL grammar covering the complete lock table statement. However, the support for expressions was very limited. It was not possible to use a date literal or to_date function to determine a partition to be locked. Time to fix that. In this episode, we will have […]
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2023-02-19
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2023-02-19
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IslandSQL Episode 3: Lock Table

Introduction In the last episode we extended the IslandSQL grammar to cover all DML statements as single lexer token. Now it’s time to handle the complete grammar for one DML statement. The simplest one is lock table. A good reason to start with it and lay the foundation for the other DML commands. […]
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2023-02-07
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2023-02-07
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IslandSQL Episode 2: All DML Statements

Introduction In the last episode we build the initial version of IslandSQL. An Island grammar for SQL scripts covering select statements. In this blog post we extend the grammar to handle the remaining DML statements. The full source code is available on GitHub and the binaries on Maven Central. Lexer Changes The […]
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2023-02-04
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2023-02-04
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IslandSQL Episode 1: Select Statement

Introduction An island grammar focuses only on a small part of a grammar. The island represents the small, interesting part and the sea the rest. In this blog post, I explain the components of an island grammar for SQL scripts named IslandSQL. In the first iteration, we focus on the select statement. Everything […]
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