46 lines
1.1 KiB
Go
46 lines
1.1 KiB
Go
package duckdb
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import (
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_ "github.com/marcboeker/go-duckdb"
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"git.fsdpf.net/go/db"
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"git.fsdpf.net/go/db/exp"
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)
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func DialectOptions() *db.SQLDialectOptions {
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do := db.DefaultDialectOptions()
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// DuckDB uses PostgreSQL-style placeholders ($1, $2, etc.)
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do.PlaceHolderFragment = []byte("$")
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do.IncludePlaceholderNum = true
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// DuckDB supports most PostgreSQL features
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do.SupportsReturn = true
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do.SupportsOrderByOnUpdate = false
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do.SupportsLimitOnUpdate = false
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do.SupportsOrderByOnDelete = false
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do.SupportsLimitOnDelete = false
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do.SupportsConflictUpdateWhere = true
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do.SupportsInsertIgnoreSyntax = false
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do.SupportsConflictTarget = true
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do.SupportsWithCTE = true
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do.SupportsWithCTERecursive = true
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do.SupportsDistinctOn = true
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do.SupportsWindowFunction = true
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// Use double quotes for identifiers (PostgreSQL-style)
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do.QuoteRune = '"'
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// regexp_matches(col, pattern) 做部分匹配，等价于 MySQL REGEXP
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do.BooleanFunctionLookup = map[exp.BooleanOperation][]byte{
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exp.RegexpLikeOp: []byte("REGEXP_MATCHES"),
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exp.RegexpILikeOp: []byte("REGEXP_MATCHES"),
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}
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return do
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}
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func init() {
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db.RegisterDialect("duckdb", DialectOptions())
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}
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