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83 lines
3.1 KiB
Go
83 lines
3.1 KiB
Go
package core
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type Command string
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const (
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CommandSelect Command = "SELECT"
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CommandInsert Command = "INSERT"
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CommandUpdate Command = "UPDATE"
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CommandDelete Command = "DELETE"
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)
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type PrepareResult struct {
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Command Command `json:"command,omitempty"`
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Columns []Column `json:"columns"`
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Parameters []Parameter `json:"parameters"`
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Stars []StarExpansion `json:"stars,omitempty"`
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}
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// StarExpansion is what a star in a target list stands for. The analyzer
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// resolves the reference against the query's scope and reports the columns it
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// covers; rewriting the query text with them is the caller's to do, since only
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// it knows how the engine quotes an identifier.
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type StarExpansion struct {
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// Location is where the target the star belongs to starts, measured the
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// way the AST measures a node: from the beginning of the file the
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// statement was parsed from.
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Location int `json:"location"`
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// Fields is the reference as it was written, with the star as its last
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// element: ["*"] for a bare star and ["foo", "*"] for a qualified one.
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Fields []string `json:"fields"`
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// Alias is the output name the target was given, if any.
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Alias string `json:"alias,omitempty"`
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Columns []StarColumn `json:"columns"`
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}
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// StarColumn is a single column a star expanded to.
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type StarColumn struct {
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// Relation is the name the column's relation goes by in the query, which
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// is its alias when it was given one.
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Relation string `json:"relation,omitempty"`
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Name string `json:"name"`
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DataType string `json:"data_type,omitempty"`
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}
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type ColumnSource struct {
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Schema string `json:"schema,omitempty"`
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Table string `json:"table,omitempty"`
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TableAlias string `json:"table_alias,omitempty"`
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Column string `json:"column,omitempty"`
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}
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type Column struct {
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Name string `json:"name"`
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DataType string `json:"data_type"`
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// Type is the column's type as an expression, carrying what DataType
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// and IsArray flatten away: arguments, nesting and inner nullability.
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Type *TypeExpr `json:"type,omitempty"`
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TypeOID int64 `json:"type_oid,omitempty"`
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NotNull bool `json:"not_null"`
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IsArray bool `json:"is_array,omitempty"`
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SourceClassOID int64 `json:"source_class_oid,omitempty"`
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SourceAttributeOID int64 `json:"source_attribute_oid,omitempty"`
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Source *ColumnSource `json:"source,omitempty"`
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DeclType string `json:"decl_type,omitempty"`
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IsPrimaryKey bool `json:"is_primary_key,omitempty"`
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IsUnique bool `json:"is_unique,omitempty"`
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IsAutoIncrement bool `json:"is_auto_increment,omitempty"`
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}
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type Parameter struct {
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Number int `json:"number"`
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Name string `json:"name,omitempty"`
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DataType string `json:"data_type,omitempty"`
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Type *TypeExpr `json:"type,omitempty"`
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TypeOID int64 `json:"type_oid,omitempty"`
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NotNull bool `json:"not_null"`
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IsArray bool `json:"is_array,omitempty"`
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Source *ColumnSource `json:"source,omitempty"`
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}
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