dialect

package

v0.1.13 Latest Latest Go to latest Published: Oct 11, 2026 License: MIT Imports: 0 Imported by: 0

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github.com/nethinwei/sql-mcp-server

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Documentation ¶

Overview ¶

Package dialect abstracts SQL dialect differences: identifier quoting, parameter placeholders, EXPLAIN wrapping, and capability negotiation.

Concrete dialect implementations live in x/providers alongside each database adapter. The heavier EXPLAIN-result parsing (cost.Explainer) and schema introspection (introspect.Introspector) also stay in x/providers because they require live database access. Capabilities drive both codegen rendering and which Gate layers are assembled per database.

Constants ¶

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Variables ¶

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Functions ¶

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Types ¶

type Capabilities ¶

type Capabilities struct {
	Returning       bool // INSERT ... RETURNING (PG has; MySQL lacks -> exec + last insert id)
	ExplainCost     bool // EXPLAIN yields a numeric cost (SQLite does not)
	ExplainAccurate bool // estimate trustworthiness (PG high; MySQL/OB medium; SQLite low)
}

Capabilities declares what a database supports. It drives codegen rendering (RETURNING or a second statement for the inserted key) and whether the cost gate assembles the Estimate layer. See the cost gate design.

type Dialect ¶

type Dialect interface {
	Name() string
	QuoteIdent(name string) string
	Placeholder(index int) string
	Capabilities() Capabilities
}

Dialect abstracts the SQL differences core codegen needs. Implementations are stateless and safe for concurrent use.

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